Merge commit '6b8802e8dd5467556a024d807a1df23940b00895' into bb-10.3-fix_len_decbb-10.3-fix_len_dec

27 files changed, 892 insertions, 592 deletions

diff --git a/mysql-test/main/alter_table.result b/mysql-test/main/alter_table.result
index cb5553a086c..ac6f9aba17b 100644
--- a/mysql-test/main/alter_table.result
+++ b/mysql-test/main/alter_table.result
@@ -2380,5 +2380,16 @@ t1	CREATE TABLE `t1` (
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 drop table t1;
 #
+# MDEV-11071: Assertion `thd->transaction.stmt.is_empty()' failed
+# in Locked_tables_list::unlock_locked_tables
+#
+CREATE TABLE t1 (d DATETIME DEFAULT CURRENT_TIMESTAMP, i INT) ENGINE=InnoDB;
+INSERT INTO t1 (i) VALUES (1),(1);
+LOCK TABLE t1 WRITE;
+ALTER TABLE t1 ADD UNIQUE(i);
+ERROR 23000: Duplicate entry '1' for key 'i'
+UNLOCK TABLES;
+DROP TABLE t1;
+#
 # End of 10.2 tests
 #
diff --git a/mysql-test/main/alter_table.test b/mysql-test/main/alter_table.test
index aa9faf710f5..c9302d588da 100644
--- a/mysql-test/main/alter_table.test
+++ b/mysql-test/main/alter_table.test
@@ -1938,5 +1938,21 @@ show create table t1;
 drop table t1;
 
 --echo #
+--echo # MDEV-11071: Assertion `thd->transaction.stmt.is_empty()' failed
+--echo # in Locked_tables_list::unlock_locked_tables
+--echo #
+
+CREATE TABLE t1 (d DATETIME DEFAULT CURRENT_TIMESTAMP, i INT) ENGINE=InnoDB;
+INSERT INTO t1 (i) VALUES (1),(1);
+LOCK TABLE t1 WRITE;
+--error ER_DUP_ENTRY
+ALTER TABLE t1 ADD UNIQUE(i);
+
+# Cleanup
+UNLOCK TABLES;
+DROP TABLE t1;
+
+
+--echo #
 --echo # End of 10.2 tests
 --echo #
diff --git a/sql/item.h b/sql/item.h
index 10ce987e289..0ee60afb3be 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -4674,7 +4674,7 @@ public:
     also to make printing of items inherited from Item_sum uniform.
   */
   virtual const char *func_name() const= 0;
-  virtual void fix_length_and_dec()= 0;
+  virtual bool fix_length_and_dec()= 0;
   bool const_item() const { return const_item_cache; }
   table_map used_tables() const { return used_tables_cache; }
   Item* build_clone(THD *thd);
diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc
index 3034636dca3..37ec33c8358 100644
--- a/sql/item_cmpfunc.cc
+++ b/sql/item_cmpfunc.cc
@@ -449,7 +449,7 @@ bool Item_func::setup_args_and_comparator(THD *thd, Arg_comparator *cmp)
 }
 
 
-void Item_bool_rowready_func2::fix_length_and_dec()
+bool Item_bool_rowready_func2::fix_length_and_dec()
 {
   max_length= 1;				     // Function returns 0 or 1
 
@@ -458,8 +458,8 @@ void Item_bool_rowready_func2::fix_length_and_dec()
     we have to check for out of memory conditions here
   */
   if (!args[0] || !args[1])
-    return;
-  setup_args_and_comparator(current_thd, &cmp);
+    return FALSE;
+  return setup_args_and_comparator(current_thd, &cmp);
 }
 
 
@@ -1107,12 +1107,13 @@ int Arg_comparator::compare_e_str_json()
 }
 
 
-void Item_func_truth::fix_length_and_dec()
+bool Item_func_truth::fix_length_and_dec()
 {
   maybe_null= 0;
   null_value= 0;
   decimals= 0;
   max_length= 1;
+  return FALSE;
 }
 
 
@@ -1731,10 +1732,11 @@ longlong Item_func_eq::val_int()
 
 /** Same as Item_func_eq, but NULL = NULL. */
 
-void Item_func_equal::fix_length_and_dec()
+bool Item_func_equal::fix_length_and_dec()
 {
-  Item_bool_rowready_func2::fix_length_and_dec();
+  bool rc= Item_bool_rowready_func2::fix_length_and_dec();
   maybe_null=null_value=0;
+  return rc;
 }
 
 longlong Item_func_equal::val_int()
@@ -1831,7 +1833,7 @@ bool Item_func_interval::fix_fields(THD *thd, Item **ref)
 }
 
 
-void Item_func_interval::fix_length_and_dec()
+bool Item_func_interval::fix_length_and_dec()
 {
   uint rows= row->cols();
   
@@ -1849,10 +1851,13 @@ void Item_func_interval::fix_length_and_dec()
       not_null_consts&= el->const_item() && !el->is_null();
     }
 
-    if (not_null_consts &&
-        (intervals= (interval_range*) current_thd->alloc(sizeof(interval_range) *
-                                                         (rows - 1))))
+    if (not_null_consts)
     {
+      intervals= (interval_range*) current_thd->alloc(sizeof(interval_range) *
+                                                         (rows - 1));
+      if (!intervals)
+        return TRUE;
+
       if (use_decimal_comparison)
       {
         for (uint i= 1; i < rows; i++)
@@ -1893,6 +1898,7 @@ void Item_func_interval::fix_length_and_dec()
   with_sum_func= with_sum_func || row->with_sum_func;
   with_param= with_param || row->with_param;
   with_field= with_field || row->with_field;
+  return FALSE;
 }
 
 
@@ -2053,7 +2059,7 @@ void Item_func_between::fix_after_pullout(st_select_lex *new_parent,
   eval_not_null_tables(NULL);
 }
 
-void Item_func_between::fix_length_and_dec()
+bool Item_func_between::fix_length_and_dec()
 {
   max_length= 1;
 
@@ -2062,15 +2068,16 @@ void Item_func_between::fix_length_and_dec()
     we have to check for out of memory conditions here
   */
   if (!args[0] || !args[1] || !args[2])
-    return;
+    return TRUE;
   if (m_comparator.aggregate_for_comparison(Item_func_between::func_name(),
                                             args, 3, true))
   {
     DBUG_ASSERT(current_thd->is_error());
-    return;
+    return TRUE;
   }
 
-  m_comparator.type_handler()->Item_func_between_fix_length_and_dec(this);
+  return m_comparator.type_handler()->
+    Item_func_between_fix_length_and_dec(this);
 }
 
 
@@ -2093,7 +2100,7 @@ bool Item_func_between::fix_length_and_dec_numeric(THD *thd)
       }
     }
   }
-  return false;
+  return FALSE;
 }
 
 
@@ -2455,7 +2462,7 @@ void Item_func_nullif::update_used_tables()
 
 
 
-void
+bool
 Item_func_nullif::fix_length_and_dec()
 {
   /*
@@ -2605,6 +2612,8 @@ Item_func_nullif::fix_length_and_dec()
     m_cache= args[0]->cmp_type() == STRING_RESULT ?
              new (thd->mem_root) Item_cache_str_for_nullif(thd, args[0]) :
              args[0]->get_cache(thd);
+    if (!m_cache)
+      return TRUE;
     m_cache->setup(thd, args[0]);
     m_cache->store(args[0]);
     m_cache->set_used_tables(args[0]->used_tables());
@@ -2618,7 +2627,8 @@ Item_func_nullif::fix_length_and_dec()
   fix_char_length(args[2]->max_char_length());
   maybe_null=1;
   m_arg0= args[0];
-  setup_args_and_comparator(thd, &cmp);
+  if (setup_args_and_comparator(thd, &cmp))
+    return TRUE;
   /*
     A special code for EXECUTE..PREPARE.
 
@@ -2658,6 +2668,7 @@ Item_func_nullif::fix_length_and_dec()
   */
   if (args[0] == m_arg0)
     m_arg0= NULL;
+  return FALSE;
 }
 
 
@@ -3053,26 +3064,26 @@ bool Item_func_case_simple::prepare_predicant_and_values(THD *thd,
 }
 
 
-void Item_func_case_searched::fix_length_and_dec()
+bool Item_func_case_searched::fix_length_and_dec()
 {
   THD *thd= current_thd;
-  aggregate_then_and_else_arguments(thd, when_count());
+  return aggregate_then_and_else_arguments(thd, when_count());
 }
 
 
-void Item_func_case_simple::fix_length_and_dec()
+bool Item_func_case_simple::fix_length_and_dec()
 {
   THD *thd= current_thd;
-  if (!aggregate_then_and_else_arguments(thd, when_count() + 1))
-    aggregate_switch_and_when_arguments(thd, false);
+  return (aggregate_then_and_else_arguments(thd, when_count() + 1) ||
+          aggregate_switch_and_when_arguments(thd, false));
 }
 
 
-void Item_func_decode_oracle::fix_length_and_dec()
+bool Item_func_decode_oracle::fix_length_and_dec()
 {
   THD *thd= current_thd;
-  if (!aggregate_then_and_else_arguments(thd, when_count() + 1))
-    aggregate_switch_and_when_arguments(thd, true);
+  return (aggregate_then_and_else_arguments(thd, when_count() + 1) ||
+          aggregate_switch_and_when_arguments(thd, true));
 }
 
 
@@ -4178,7 +4189,7 @@ bool Item_func_in::prepare_predicant_and_values(THD *thd, uint *found_types)
 }
 
 
-void Item_func_in::fix_length_and_dec()
+bool Item_func_in::fix_length_and_dec()
 {
   THD *thd= current_thd;
   uint found_types;
@@ -4188,18 +4199,20 @@ void Item_func_in::fix_length_and_dec()
   if (prepare_predicant_and_values(thd, &found_types))
   {
     DBUG_ASSERT(thd->is_error()); // Must set error
-    return;
+    return TRUE;
   }
 
   if (arg_types_compatible) // Bisection condition #1
   {
-    m_comparator.type_handler()->
-      Item_func_in_fix_comparator_compatible_types(thd, this);
+    if (m_comparator.type_handler()->
+        Item_func_in_fix_comparator_compatible_types(thd, this))
+      return TRUE;
   }
   else
   {
     DBUG_ASSERT(m_comparator.cmp_type() != ROW_RESULT);
-    fix_for_scalar_comparison_using_cmp_items(thd, found_types);
+    if ( fix_for_scalar_comparison_using_cmp_items(thd, found_types))
+      return TRUE;
   }
 
   DBUG_EXECUTE_IF("Item_func_in",
@@ -4207,6 +4220,7 @@ void Item_func_in::fix_length_and_dec()
                   ER_UNKNOWN_ERROR, "DBUG: types_compatible=%s bisect=%s",
                   arg_types_compatible ? "yes" : "no",
                   array != NULL ? "yes" : "no"););
+  return FALSE;
 }
 
 
@@ -4634,7 +4648,8 @@ Item_cond::fix_fields(THD *thd, Item **ref)
     with_window_func|= item->with_window_func;
     maybe_null|=       item->maybe_null;
   }
-  fix_length_and_dec();
+  if (fix_length_and_dec())
+    return TRUE;
   fixed= 1;
   return FALSE;
 }
@@ -5669,16 +5684,16 @@ bool Item_func_regex::fix_fields(THD *thd, Item **ref)
   return Item_bool_func::fix_fields(thd, ref);
 }
 
-void
+bool
 Item_func_regex::fix_length_and_dec()
 {
-  Item_bool_func::fix_length_and_dec();
-
-  if (agg_arg_charsets_for_comparison(cmp_collation, args, 2))
-    return;
+  if (Item_bool_func::fix_length_and_dec() ||
+      agg_arg_charsets_for_comparison(cmp_collation, args, 2))
+    return TRUE;
 
   re.init(cmp_collation.collation, 0);
   re.fix_owner(this, args[0], args[1]);
+  return FALSE;
 }
 
 
@@ -5702,15 +5717,16 @@ bool Item_func_regexp_instr::fix_fields(THD *thd, Item **ref)
 }
 
 
-void
+bool
 Item_func_regexp_instr::fix_length_and_dec()
 {
   if (agg_arg_charsets_for_comparison(cmp_collation, args, 2))
-    return;
+    return TRUE;
 
   re.init(cmp_collation.collation, 0);
   re.fix_owner(this, args[0], args[1]);
   max_length= MY_INT32_NUM_DECIMAL_DIGITS; // See also Item_func_locate
+  return FALSE;
 }
 
 
@@ -6653,7 +6669,8 @@ bool Item_equal::fix_fields(THD *thd, Item **ref)
   }
   if (prev_equal_field && last_equal_field != first_equal_field)
     last_equal_field->next_equal_field= first_equal_field;
-  fix_length_and_dec();
+  if (fix_length_and_dec())
+    return TRUE;
   fixed= 1;
   return FALSE;
 }
@@ -6739,11 +6756,12 @@ longlong Item_equal::val_int()
 }
 
 
-void Item_equal::fix_length_and_dec()
+bool Item_equal::fix_length_and_dec()
 {
   Item *item= get_first(NO_PARTICULAR_TAB, NULL);
   const Type_handler *handler= item->type_handler();
   eval_item= handler->make_cmp_item(current_thd, item->collation.collation);
+  return eval_item == NULL;
 }
 
 
diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h
index 30d682f05aa..c321b826ea4 100644
--- a/sql/item_cmpfunc.h
+++ b/sql/item_cmpfunc.h
@@ -218,7 +218,7 @@ public:
   const Type_handler *type_handler() const { return &type_handler_long; }
   bool is_bool_type() { return true; }
   virtual CHARSET_INFO *compare_collation() const { return NULL; }
-  void fix_length_and_dec() { decimals=0; max_length=1; }
+  bool fix_length_and_dec() { decimals=0; max_length=1; return FALSE; }
   uint decimal_precision() const { return 1; }
   bool need_parentheses_in_default() { return true; }
 };
@@ -234,7 +234,7 @@ class Item_func_truth : public Item_bool_func
 public:
   virtual bool val_bool();
   virtual longlong val_int();
-  virtual void fix_length_and_dec();
+  virtual bool fix_length_and_dec();
   virtual void print(String *str, enum_query_type query_type);
   enum precedence precedence() const { return CMP_PRECEDENCE; }
 
@@ -521,7 +521,7 @@ public:
                                       cond);
     return this;
   }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   int set_cmp_func()
   {
     return cmp.set_cmp_func(this, tmp_arg, tmp_arg + 1, true);
@@ -734,7 +734,7 @@ public:
   Item_func_equal(THD *thd, Item *a, Item *b):
     Item_bool_rowready_func2(thd, a, b) {}
   longlong val_int();
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   table_map not_null_tables() const { return 0; }
   enum Functype functype() const { return EQUAL_FUNC; }
   enum Functype rev_functype() const { return EQUAL_FUNC; }
@@ -903,7 +903,7 @@ public:
   enum Functype functype() const   { return BETWEEN; }
   const char *func_name() const { return "between"; }
   enum precedence precedence() const { return BETWEEN_PRECEDENCE; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool fix_length_and_dec_string(THD *)
   {
     return agg_arg_charsets_for_comparison(cmp_collation, args, 3);
@@ -950,10 +950,12 @@ public:
   longlong val_int();
   uint decimal_precision() const { return 1; }
   const char *func_name() const { return "strcmp"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    agg_arg_charsets_for_comparison(cmp_collation, args, 2);
-    fix_char_length(2); // returns "1" or "0" or "-1"
+    if (agg_arg_charsets_for_comparison(cmp_collation, args, 2))
+      return TRUE;
+    fix_char_length(2);
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_strcmp>(thd, this); }
@@ -982,7 +984,7 @@ public:
   { }
   bool fix_fields(THD *, Item **);
   longlong val_int();
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "interval"; }
   uint decimal_precision() const { return 2; }
   void print(String *str, enum_query_type query_type)
@@ -1008,10 +1010,12 @@ public:
   my_decimal *decimal_op(my_decimal *);
   bool date_op(MYSQL_TIME *ltime, ulonglong fuzzydate);
   bool time_op(MYSQL_TIME *ltime);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    if (!aggregate_for_result(func_name(), args, arg_count, true))
-      fix_attributes(args, arg_count);
+    if (aggregate_for_result(func_name(), args, arg_count, true))
+      return TRUE;
+    fix_attributes(args, arg_count);
+    return FALSE;
   }
   const char *func_name() const { return "coalesce"; }
   table_map not_null_tables() const { return 0; }
@@ -1029,10 +1033,12 @@ public:
 class Item_func_case_abbreviation2 :public Item_func_case_expression
 {
 protected:
-  void fix_length_and_dec2(Item **items)
+  bool fix_length_and_dec2(Item **items)
   {
-    if (!aggregate_for_result(func_name(), items, 2, true))
-      fix_attributes(items, 2);
+    if (aggregate_for_result(func_name(), items, 2, true))
+      return TRUE;
+    fix_attributes(items, 2);
+    return FALSE;
   }
 
   void cache_type_info(const Item *source, bool maybe_null_arg)
@@ -1042,7 +1048,7 @@ protected:
     maybe_null= maybe_null_arg;
   }
 
-  void fix_length_and_dec2_eliminate_null(Item **items)
+  bool fix_length_and_dec2_eliminate_null(Item **items)
   {
     // Let IF(cond, expr, NULL) and IF(cond, NULL, expr) inherit type from expr.
     if (items[0]->type() == NULL_ITEM)
@@ -1058,8 +1064,10 @@ protected:
     }
     else
     {
-      fix_length_and_dec2(items);
+      if (fix_length_and_dec2(items))
+        return TRUE;
     }
+    return FALSE;
   }
 
 public:
@@ -1081,10 +1089,12 @@ public:
   my_decimal *decimal_op(my_decimal *);
   bool date_op(MYSQL_TIME *ltime, ulonglong fuzzydate);
   bool time_op(MYSQL_TIME *ltime);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    Item_func_case_abbreviation2::fix_length_and_dec2(args);
+    if (Item_func_case_abbreviation2::fix_length_and_dec2(args))
+      return TRUE;
     maybe_null= args[1]->maybe_null;
+    return FALSE;
   }
   const char *func_name() const { return "ifnull"; }
 
@@ -1150,9 +1160,9 @@ public:
     Item_func_case_abbreviation2_switch(thd, a, b, c)
   {}
   bool fix_fields(THD *, Item **);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    fix_length_and_dec2_eliminate_null(args + 1);
+    return fix_length_and_dec2_eliminate_null(args + 1);
   }
   const char *func_name() const { return "if"; }
   bool eval_not_null_tables(void *opt_arg);
@@ -1174,9 +1184,9 @@ public:
     Item_func_case_abbreviation2_switch(thd, a, b, c)
   {}
   const char *func_name() const { return "nvl2"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    fix_length_and_dec2_eliminate_null(args + 1);
+    return fix_length_and_dec2_eliminate_null(args + 1);
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_nvl2>(thd, this); }
@@ -1236,7 +1246,7 @@ public:
   longlong int_op();
   String *str_op(String *str);
   my_decimal *decimal_op(my_decimal *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool walk(Item_processor processor, bool walk_subquery, void *arg);
   const char *func_name() const { return "nullif"; }
   void print(String *str, enum_query_type query_type);
@@ -2145,7 +2155,7 @@ public:
     reorder_args(0);
   }
   void print(String *str, enum_query_type query_type);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond)
   {
     // None of the arguments are in a comparison context
@@ -2197,7 +2207,7 @@ public:
     DBUG_VOID_RETURN;
   }
   void print(String *str, enum_query_type query_type);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond);
   Item *find_item();
   Item *build_clone(THD *thd)
@@ -2222,7 +2232,7 @@ public:
   { }
   const char *func_name() const { return "decode_oracle"; }
   void print(String *str, enum_query_type query_type);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *find_item();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_decode_oracle>(thd, this); }
@@ -2310,7 +2320,7 @@ public:
   { }
   longlong val_int();
   bool fix_fields(THD *, Item **);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool compatible_types_scalar_bisection_possible()
   {
     DBUG_ASSERT(m_comparator.cmp_type() != ROW_RESULT);
@@ -2469,7 +2479,11 @@ public:
   }
   CHARSET_INFO *compare_collation() const
   { return args[0]->collation.collation; }
-  void fix_length_and_dec() { decimals=0; max_length=1; maybe_null=0; }
+  bool fix_length_and_dec()
+  {
+    decimals=0; max_length=1; maybe_null=0;
+    return FALSE;
+  }
   bool count_sargable_conds(void *arg);
 };
 
@@ -2693,10 +2707,10 @@ public:
   const char *func_name() const { return "like"; }
   enum precedence precedence() const { return CMP_PRECEDENCE; }
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     max_length= 1;
-    agg_arg_charsets_for_comparison(cmp_collation, args, 2);
+    return agg_arg_charsets_for_comparison(cmp_collation, args, 2);
   }
   void cleanup();
 
@@ -2817,7 +2831,7 @@ public:
   }
   longlong val_int();
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "regexp"; }
   enum precedence precedence() const { return CMP_PRECEDENCE; }
   Item *get_copy(THD *thd)
@@ -2867,7 +2881,7 @@ public:
   }
   longlong val_int();
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "regexp_instr"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_regexp_instr>(thd, this); }
@@ -3103,7 +3117,7 @@ public:
   longlong val_int(); 
   const char *func_name() const { return "multiple equal"; }
   void sort(Item_field_cmpfunc compare, void *arg);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool fix_fields(THD *thd, Item **ref);
   void cleanup()
   {
diff --git a/sql/item_func.cc b/sql/item_func.cc
index 567c813de3c..5693484ad3b 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -377,8 +377,7 @@ Item_func::fix_fields(THD *thd, Item **ref)
   }
   if (check_arguments())
     return true;
-  fix_length_and_dec();
-  if (unlikely(thd->is_error())) // An error inside fix_length_and_dec occurred
+  if (fix_length_and_dec())
     return TRUE;
   fixed= 1;
   return FALSE;
@@ -762,10 +761,12 @@ String *Item_int_func::val_str(String *str)
 }
 
 
-void Item_func_connection_id::fix_length_and_dec()
+bool Item_func_connection_id::fix_length_and_dec()
 {
-  Item_long_func::fix_length_and_dec();
+  if (Item_long_func::fix_length_and_dec())
+    return TRUE;
   max_length= 10;
+  return FALSE;
 }
 
 
@@ -792,19 +793,19 @@ bool Item_num_op::fix_type_handler(const Type_aggregator *aggregator)
 }
 
 
-void Item_func_plus::fix_length_and_dec(void)
+bool Item_func_plus::fix_length_and_dec(void)
 {
   DBUG_ENTER("Item_func_plus::fix_length_and_dec");
   DBUG_PRINT("info", ("name %s", func_name()));
   const Type_aggregator *aggregator= &type_handler_data->m_type_aggregator_for_plus;
   DBUG_EXECUTE_IF("num_op", aggregator= &type_handler_data->m_type_aggregator_for_result;);
   DBUG_ASSERT(aggregator->is_commutative());
-  if (!fix_type_handler(aggregator))
-  {
-    Item_func_plus::type_handler()->Item_func_plus_fix_length_and_dec(this);
-    DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
-  }
-  DBUG_VOID_RETURN;
+  if (fix_type_handler(aggregator))
+    DBUG_RETURN(TRUE);
+  if (Item_func_plus::type_handler()->Item_func_plus_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
+  DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -1319,19 +1320,19 @@ void Item_func_minus::fix_unsigned_flag()
 }
 
 
-void Item_func_minus::fix_length_and_dec()
+bool Item_func_minus::fix_length_and_dec()
 {
   DBUG_ENTER("Item_func_minus::fix_length_and_dec");
   DBUG_PRINT("info", ("name %s", func_name()));
   const Type_aggregator *aggregator= &type_handler_data->m_type_aggregator_for_minus;
   DBUG_EXECUTE_IF("num_op", aggregator= &type_handler_data->m_type_aggregator_non_commutative_test;);
   DBUG_ASSERT(!aggregator->is_commutative());
-  if (!fix_type_handler(aggregator))
-  {
-    Item_func_minus::type_handler()->Item_func_minus_fix_length_and_dec(this);
-    DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
-  }
-  DBUG_VOID_RETURN;
+  if (fix_type_handler(aggregator))
+    DBUG_RETURN(TRUE);
+  if (Item_func_minus::type_handler()->Item_func_minus_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
+  DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -1551,19 +1552,19 @@ void Item_func_mul::result_precision()
 }
 
 
-void Item_func_mul::fix_length_and_dec(void)
+bool Item_func_mul::fix_length_and_dec(void)
 {
   DBUG_ENTER("Item_func_mul::fix_length_and_dec");
   DBUG_PRINT("info", ("name %s", func_name()));
   const Type_aggregator *aggregator= &type_handler_data->m_type_aggregator_for_mul;
   DBUG_EXECUTE_IF("num_op", aggregator= &type_handler_data->m_type_aggregator_for_result;);
   DBUG_ASSERT(aggregator->is_commutative());
-  if (!fix_type_handler(aggregator))
-  {
-    Item_func_mul::type_handler()->Item_func_mul_fix_length_and_dec(this);
-    DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
-  }
-  DBUG_VOID_RETURN;
+  if (fix_type_handler(aggregator))
+    DBUG_RETURN(TRUE);
+  if (Item_func_mul::type_handler()->Item_func_mul_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
+  DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -1658,7 +1659,7 @@ void Item_func_div::fix_length_and_dec_int(void)
 }
 
 
-void Item_func_div::fix_length_and_dec(void)
+bool Item_func_div::fix_length_and_dec()
 {
   DBUG_ENTER("Item_func_div::fix_length_and_dec");
   DBUG_PRINT("info", ("name %s", func_name()));
@@ -1668,12 +1669,12 @@ void Item_func_div::fix_length_and_dec(void)
   const Type_aggregator *aggregator= &type_handler_data->m_type_aggregator_for_div;
   DBUG_EXECUTE_IF("num_op", aggregator= &type_handler_data->m_type_aggregator_non_commutative_test;);
   DBUG_ASSERT(!aggregator->is_commutative());
-  if (!fix_type_handler(aggregator))
-  {
-    Item_func_div::type_handler()->Item_func_div_fix_length_and_dec(this);
-    DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
-  }
-  DBUG_VOID_RETURN;
+  if (fix_type_handler(aggregator))
+    DBUG_RETURN(TRUE);
+  if (Item_func_div::type_handler()->Item_func_div_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
+  DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -1749,7 +1750,7 @@ longlong Item_func_int_div::val_int()
 }
 
 
-void Item_func_int_div::fix_length_and_dec()
+bool Item_func_int_div::fix_length_and_dec()
 {
   Item_result argtype= args[0]->result_type();
   /* use precision ony for the data type it is applicable for and valid */
@@ -1760,6 +1761,7 @@ void Item_func_int_div::fix_length_and_dec()
                   MY_INT64_NUM_DECIMAL_DIGITS : char_length);
   maybe_null=1;
   unsigned_flag=args[0]->unsigned_flag | args[1]->unsigned_flag;
+  return false;
 }
 
 
@@ -1843,7 +1845,7 @@ void Item_func_mod::result_precision()
 }
 
 
-void Item_func_mod::fix_length_and_dec()
+bool Item_func_mod::fix_length_and_dec()
 {
   DBUG_ENTER("Item_func_mod::fix_length_and_dec");
   DBUG_PRINT("info", ("name %s", func_name()));
@@ -1851,12 +1853,12 @@ void Item_func_mod::fix_length_and_dec()
   const Type_aggregator *aggregator= &type_handler_data->m_type_aggregator_for_mod;
   DBUG_EXECUTE_IF("num_op", aggregator= &type_handler_data->m_type_aggregator_non_commutative_test;);
   DBUG_ASSERT(!aggregator->is_commutative());
-  if (!fix_type_handler(aggregator))
-  {
-    Item_func_mod::type_handler()->Item_func_mod_fix_length_and_dec(this);
-    DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
-  }
-  DBUG_VOID_RETURN;
+  if (fix_type_handler(aggregator))
+    DBUG_RETURN(TRUE);
+  if (Item_func_mod::type_handler()->Item_func_mod_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
+  DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -1954,13 +1956,15 @@ void Item_func_neg::fix_length_and_dec_decimal()
 }
 
 
-void Item_func_neg::fix_length_and_dec()
+bool Item_func_neg::fix_length_and_dec()
 {
   DBUG_ENTER("Item_func_neg::fix_length_and_dec");
   DBUG_PRINT("info", ("name %s", func_name()));
-  args[0]->cast_to_int_type_handler()->Item_func_neg_fix_length_and_dec(this);
+  if (args[0]->cast_to_int_type_handler()->
+      Item_func_neg_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
   DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -1999,7 +2003,6 @@ my_decimal *Item_func_abs::decimal_op(my_decimal *decimal_value)
   return 0;
 }
 
-
 void Item_func_abs::fix_length_and_dec_int()
 {
   max_length= args[0]->max_length;
@@ -2026,13 +2029,15 @@ void Item_func_abs::fix_length_and_dec_decimal()
 }
 
 
-void Item_func_abs::fix_length_and_dec()
+bool Item_func_abs::fix_length_and_dec()
 {
   DBUG_ENTER("Item_func_abs::fix_length_and_dec");
   DBUG_PRINT("info", ("name %s", func_name()));
-  args[0]->cast_to_int_type_handler()->Item_func_abs_fix_length_and_dec(this);
+  if (args[0]->cast_to_int_type_handler()->
+      Item_func_abs_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
   DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -2298,14 +2303,15 @@ void Item_func_int_val::fix_length_and_dec_double()
 }
 
 
-void Item_func_int_val::fix_length_and_dec()
+bool Item_func_int_val::fix_length_and_dec()
 {
   DBUG_ENTER("Item_func_int_val::fix_length_and_dec");
   DBUG_PRINT("info", ("name %s", func_name()));
-  args[0]->cast_to_int_type_handler()->
-    Item_func_int_val_fix_length_and_dec(this);
+  if (args[0]->cast_to_int_type_handler()->
+      Item_func_int_val_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
   DBUG_PRINT("info", ("Type: %s", type_handler()->name().ptr()));
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -2485,7 +2491,6 @@ void Item_func_round::fix_arg_int()
   }
   else
     fix_length_and_dec_double(args[0]->decimals);
-
 }
 
 
@@ -3042,14 +3047,15 @@ longlong Item_func_field::val_int()
 }
 
 
-void Item_func_field::fix_length_and_dec()
+bool Item_func_field::fix_length_and_dec()
 {
   maybe_null=0; max_length=3;
   cmp_type= args[0]->result_type();
   for (uint i=1; i < arg_count ; i++)
     cmp_type= item_cmp_type(cmp_type, args[i]->result_type());
   if (cmp_type == STRING_RESULT)
-    agg_arg_charsets_for_comparison(cmp_collation, args, arg_count);
+    return agg_arg_charsets_for_comparison(cmp_collation, args, arg_count);
+  return FALSE;
 }
 
 
@@ -3096,7 +3102,7 @@ longlong Item_func_ord::val_int()
 	/* Returns number of found type >= 1 or 0 if not found */
 	/* This optimizes searching in enums to bit testing! */
 
-void Item_func_find_in_set::fix_length_and_dec()
+bool Item_func_find_in_set::fix_length_and_dec()
 {
   decimals=0;
   max_length=3;					// 1-999
@@ -3118,7 +3124,7 @@ void Item_func_find_in_set::fix_length_and_dec()
       }
     }
   }
-  agg_arg_charsets_for_comparison(cmp_collation, args, 2);
+  return agg_arg_charsets_for_comparison(cmp_collation, args, 2);
 }
 
 static const char separator=',';
@@ -3319,7 +3325,8 @@ udf_handler::fix_fields(THD *thd, Item_func_or_sum *func,
       DBUG_RETURN(TRUE);
     }
   }
-  func->fix_length_and_dec();
+  if (func->fix_length_and_dec())
+    DBUG_RETURN(TRUE);
   initid.max_length=func->max_length;
   initid.maybe_null=func->maybe_null;
   initid.const_item=func->const_item_cache;
@@ -3659,13 +3666,13 @@ String *Item_func_udf_decimal::val_str(String *str)
 
 /* Default max_length is max argument length */
 
-void Item_func_udf_str::fix_length_and_dec()
+bool Item_func_udf_str::fix_length_and_dec()
 {
   DBUG_ENTER("Item_func_udf_str::fix_length_and_dec");
   max_length=0;
   for (uint i = 0; i < arg_count; i++)
     set_if_bigger(max_length,args[i]->max_length);
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 String *Item_func_udf_str::val_str(String *str)
@@ -4573,7 +4580,7 @@ bool Item_func_set_user_var::fix_fields(THD *thd, Item **ref)
 }
 
 
-void
+bool
 Item_func_set_user_var::fix_length_and_dec()
 {
   maybe_null=args[0]->maybe_null;
@@ -4587,6 +4594,7 @@ Item_func_set_user_var::fix_length_and_dec()
                            args[0]->collation.collation);
   }
   unsigned_flag= args[0]->unsigned_flag;
+  return FALSE;
 }
 
 
@@ -5426,7 +5434,7 @@ err:
   return 1;
 }
 
-void Item_func_get_user_var::fix_length_and_dec()
+bool Item_func_get_user_var::fix_length_and_dec()
 {
   THD *thd=current_thd;
   int error;
@@ -5475,6 +5483,7 @@ void Item_func_get_user_var::fix_length_and_dec()
     set_handler(&type_handler_long_blob);
     max_length= MAX_BLOB_WIDTH;
   }
+  return false;
 }
 
 
@@ -5627,7 +5636,7 @@ void Item_func_get_system_var::update_null_value()
 }
 
 
-void Item_func_get_system_var::fix_length_and_dec()
+bool Item_func_get_system_var::fix_length_and_dec()
 {
   char *cptr;
   maybe_null= TRUE;
@@ -5639,7 +5648,7 @@ void Item_func_get_system_var::fix_length_and_dec()
     {
       my_error(ER_INCORRECT_GLOBAL_LOCAL_VAR, MYF(0),
                var->name.str, var_type == OPT_GLOBAL ? "SESSION" : "GLOBAL");
-      return;
+      return TRUE;
     }
     /* As there was no local variable, return the global value */
     var_type= OPT_GLOBAL;
@@ -5703,6 +5712,7 @@ void Item_func_get_system_var::fix_length_and_dec()
       my_error(ER_VAR_CANT_BE_READ, MYF(0), var->name.str);
       break;
   }
+  return FALSE;
 }
 
 
@@ -6362,7 +6372,7 @@ bool Item_func_sp::is_expensive()
   @note called from Item::fix_fields.
 */
 
-void Item_func_sp::fix_length_and_dec()
+bool Item_func_sp::fix_length_and_dec()
 {
   DBUG_ENTER("Item_func_sp::fix_length_and_dec");
 
@@ -6372,7 +6382,7 @@ void Item_func_sp::fix_length_and_dec()
   collation.derivation= DERIVATION_COERCIBLE;
   maybe_null= 1;
 
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -6687,11 +6697,12 @@ bool Item_func_last_value::get_date(MYSQL_TIME *ltime, ulonglong fuzzydate)
 }
 
 
-void Item_func_last_value::fix_length_and_dec()
+bool Item_func_last_value::fix_length_and_dec()
 {
   last_value=          args[arg_count -1];
   Type_std_attributes::set(last_value);
   maybe_null=          last_value->maybe_null;
+  return FALSE;
 }
 
 
diff --git a/sql/item_func.h b/sql/item_func.h
index 049ef82f71e..b4f3cce612d 100644
--- a/sql/item_func.h
+++ b/sql/item_func.h
@@ -397,8 +397,12 @@ public:
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate)
   { return get_date_from_real(ltime, fuzzydate); }
   const Type_handler *type_handler() const { return &type_handler_double; }
-  void fix_length_and_dec()
-  { decimals= NOT_FIXED_DEC; max_length= float_length(decimals); }
+  bool fix_length_and_dec()
+  {
+    decimals= NOT_FIXED_DEC;
+    max_length= float_length(decimals);
+    return FALSE;
+  }
 };
 
 
@@ -784,7 +788,7 @@ public:
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate)
   { return get_date_from_int(ltime, fuzzydate); }
   const Type_handler *type_handler() const= 0;
-  void fix_length_and_dec() {}
+  bool fix_length_and_dec() { return FALSE; }
 };
 
 
@@ -798,7 +802,7 @@ public:
   Item_long_func(THD *thd, List<Item> &list): Item_int_func(thd, list) { }
   Item_long_func(THD *thd, Item_long_func *item) :Item_int_func(thd, item) {}
   const Type_handler *type_handler() const { return &type_handler_long; }
-  void fix_length_and_dec() { max_length= 11; }
+  bool fix_length_and_dec() { max_length= 11; return FALSE; }
 };
 
 
@@ -860,7 +864,7 @@ class Item_func_connection_id :public Item_long_func
 public:
   Item_func_connection_id(THD *thd): Item_long_func(thd) { unsigned_flag=1; }
   const char *func_name() const { return "connection_id"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool fix_fields(THD *thd, Item **ref);
   longlong val_int() { DBUG_ASSERT(fixed == 1); return value; }
   bool check_vcol_func_processor(void *arg)
@@ -917,9 +921,9 @@ public:
     set_if_bigger(char_length, 1U + (unsigned_flag ? 0 : 1));
     fix_char_length(char_length);
   }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    args[0]->type_handler()->Item_func_signed_fix_length_and_dec(this);
+    return args[0]->type_handler()->Item_func_signed_fix_length_and_dec(this);
   }
   virtual void print(String *str, enum_query_type query_type);
   uint decimal_precision() const { return args[0]->decimal_precision(); }
@@ -949,9 +953,9 @@ public:
     null_value= args[0]->null_value;
     return value;
   }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    args[0]->type_handler()->Item_func_unsigned_fix_length_and_dec(this);
+    return args[0]->type_handler()->Item_func_unsigned_fix_length_and_dec(this);
   }
   uint decimal_precision() const { return max_length; }
   virtual void print(String *str, enum_query_type query_type);
@@ -980,9 +984,10 @@ public:
   { return get_date_from_decimal(ltime, fuzzydate); }
   const Type_handler *type_handler() const { return &type_handler_newdecimal; }
   void fix_length_and_dec_generic() {}
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    args[0]->type_handler()->Item_decimal_typecast_fix_length_and_dec(this);
+    return
+      args[0]->type_handler()->Item_decimal_typecast_fix_length_and_dec(this);
   }
   const char *func_name() const { return "decimal_typecast"; }
   virtual void print(String *str, enum_query_type query_type);
@@ -1003,9 +1008,10 @@ public:
   }
   double val_real();
   void fix_length_and_dec_generic() { maybe_null= 1; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    args[0]->type_handler()->Item_double_typecast_fix_length_and_dec(this);
+    return
+      args[0]->type_handler()->Item_double_typecast_fix_length_and_dec(this);
   }
   const char *func_name() const { return "double_typecast"; }
   virtual void print(String *str, enum_query_type query_type);
@@ -1032,7 +1038,7 @@ public:
     Item_func_additive_op(thd, a, b) {}
   const char *func_name() const { return "+"; }
   enum precedence precedence() const { return ADD_PRECEDENCE; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   longlong int_op();
   double real_op();
   my_decimal *decimal_op(my_decimal *);
@@ -1050,7 +1056,7 @@ public:
   longlong int_op();
   double real_op();
   my_decimal *decimal_op(my_decimal *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   void fix_unsigned_flag();
   void fix_length_and_dec_double()
   {
@@ -1083,7 +1089,7 @@ public:
   double real_op();
   my_decimal *decimal_op(my_decimal *);
   void result_precision();
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
   Item *get_copy(THD *thd)
@@ -1101,7 +1107,7 @@ public:
   my_decimal *decimal_op(my_decimal *);
   const char *func_name() const { return "/"; }
   enum precedence precedence() const { return MUL_PRECEDENCE; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   void fix_length_and_dec_double();
   void fix_length_and_dec_int();
   void result_precision();
@@ -1120,7 +1126,7 @@ public:
   enum precedence precedence() const { return MUL_PRECEDENCE; }
   const Type_handler *type_handler() const
   { return type_handler_long_or_longlong(); }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   void print(String *str, enum_query_type query_type)
   {
     print_op(str, query_type);
@@ -1144,7 +1150,7 @@ public:
   const char *func_name() const { return "MOD"; }
   enum precedence precedence() const { return MUL_PRECEDENCE; }
   void result_precision();
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   void fix_length_and_dec_double()
   {
     Item_num_op::fix_length_and_dec_double();
@@ -1187,7 +1193,7 @@ public:
   void fix_length_and_dec_int();
   void fix_length_and_dec_double();
   void fix_length_and_dec_decimal();
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   uint decimal_precision() const { return args[0]->decimal_precision(); }
   bool need_parentheses_in_default() { return true; }
   Item *get_copy(THD *thd)
@@ -1206,7 +1212,7 @@ public:
   void fix_length_and_dec_int();
   void fix_length_and_dec_double();
   void fix_length_and_dec_decimal();
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_abs>(thd, this); }
 };
@@ -1220,10 +1226,11 @@ class Item_dec_func :public Item_real_func
  public:
   Item_dec_func(THD *thd, Item *a): Item_real_func(thd, a) {}
   Item_dec_func(THD *thd, Item *a, Item *b): Item_real_func(thd, a, b) {}
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals=NOT_FIXED_DEC; max_length=float_length(decimals);
     maybe_null=1;
+    return FALSE;
   }
 };
 
@@ -1383,7 +1390,7 @@ public:
   Item_func_int_val(THD *thd, Item *a): Item_func_num1(thd, a) {}
   void fix_length_and_dec_double();
   void fix_length_and_dec_int_or_decimal();
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
 };
 
 
@@ -1429,9 +1436,9 @@ public:
   void fix_arg_decimal();
   void fix_arg_int();
   void fix_arg_double();
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    args[0]->type_handler()->Item_func_round_fix_length_and_dec(this);
+    return args[0]->type_handler()->Item_func_round_fix_length_and_dec(this);
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_round>(thd, this); }
@@ -1473,7 +1480,7 @@ public:
   Item_func_sign(THD *thd, Item *a): Item_long_func(thd, a) {}
   const char *func_name() const { return "sign"; }
   uint decimal_precision() const { return 1; }
-  void fix_length_and_dec() { fix_char_length(2); }
+  bool fix_length_and_dec() { fix_char_length(2); return FALSE; }
   longlong val_int();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_sign>(thd, this); }
@@ -1492,8 +1499,12 @@ public:
     Item_real_func(thd, a), name(name_arg), mul(mul_arg), add(add_arg) {}
   double val_real();
   const char *func_name() const { return name; }
-  void fix_length_and_dec()
-  { decimals= NOT_FIXED_DEC; max_length= float_length(decimals); }
+  bool fix_length_and_dec()
+  {
+    decimals= NOT_FIXED_DEC;
+    max_length= float_length(decimals);
+    return FALSE;
+  }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_units>(thd, this); }
 };
@@ -1577,11 +1588,12 @@ public:
     Item_func::aggregate_attributes_real(items, nitems);
     max_length= float_length(decimals);
   }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     if (aggregate_for_min_max(func_name(), args, arg_count))
-      return;
+      return true;
     fix_attributes(args, arg_count);
+    return false;
   }
 };
 
@@ -1626,11 +1638,12 @@ public:
   const char *func_name() const { return "rollup_const"; }
   bool const_item() const { return 0; }
   const Type_handler *type_handler() const { return args[0]->type_handler(); }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation= args[0]->collation;
     max_length= args[0]->max_length;
     decimals=args[0]->decimals;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_rollup_const>(thd, this); }
@@ -1643,7 +1656,7 @@ class Item_long_func_length: public Item_long_func
   { return args[0]->check_type_can_return_str(func_name()); }
 public:
   Item_long_func_length(THD *thd, Item *a): Item_long_func(thd, a) {}
-  void fix_length_and_dec() { max_length=10; }
+  bool fix_length_and_dec() { max_length=10; return FALSE; }
 };
 
 
@@ -1663,9 +1676,10 @@ class Item_func_bit_length :public Item_longlong_func
   String value;
 public:
   Item_func_bit_length(THD *thd, Item *a): Item_longlong_func(thd, a) {}
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     max_length= 11; // 0x100000000*8 = 34,359,738,368
+    return FALSE;
   }
   longlong val_int();
   const char *func_name() const { return "bit_length"; }
@@ -1692,7 +1706,7 @@ public:
   Item_func_coercibility(THD *thd, Item *a): Item_long_func(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "coercibility"; }
-  void fix_length_and_dec() { max_length=10; maybe_null= 0; }
+  bool fix_length_and_dec() { max_length=10; maybe_null= 0; return FALSE; }
   bool eval_not_null_tables(void *)
   {
     not_null_tables_cache= 0;
@@ -1728,10 +1742,10 @@ public:
    :Item_long_func(thd, a, b, c) {}
   const char *func_name() const { return "locate"; }
   longlong val_int();
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     max_length= MY_INT32_NUM_DECIMAL_DIGITS;
-    agg_arg_charsets_for_comparison(cmp_collation, args, 2);
+    return agg_arg_charsets_for_comparison(cmp_collation, args, 2);
   }
   virtual void print(String *str, enum_query_type query_type);
   Item *get_copy(THD *thd)
@@ -1748,7 +1762,7 @@ public:
   Item_func_field(THD *thd, List<Item> &list): Item_long_func(thd, list) {}
   longlong val_int();
   const char *func_name() const { return "field"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_field>(thd, this); }
 };
@@ -1763,7 +1777,7 @@ public:
   Item_func_ascii(THD *thd, Item *a): Item_long_func(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "ascii"; }
-  void fix_length_and_dec() { max_length=3; }
+  bool fix_length_and_dec() { max_length=3; return FALSE; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_ascii>(thd, this); }
 };
@@ -1775,7 +1789,7 @@ class Item_func_ord :public Item_long_func
   String value;
 public:
   Item_func_ord(THD *thd, Item *a): Item_long_func(thd, a) {}
-  void fix_length_and_dec() { fix_char_length(7); }
+  bool fix_length_and_dec() { fix_char_length(7); return FALSE; }
   longlong val_int();
   const char *func_name() const { return "ord"; }
   Item *get_copy(THD *thd)
@@ -1795,7 +1809,7 @@ public:
     Item_long_func(thd, a, b), enum_value(0) {}
   longlong val_int();
   const char *func_name() const { return "find_in_set"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_find_in_set>(thd, this); }
 };
@@ -1809,7 +1823,7 @@ class Item_func_bit: public Item_longlong_func
 public:
   Item_func_bit(THD *thd, Item *a, Item *b): Item_longlong_func(thd, a, b) {}
   Item_func_bit(THD *thd, Item *a): Item_longlong_func(thd, a) {}
-  void fix_length_and_dec() { unsigned_flag= 1; }
+  bool fix_length_and_dec() { unsigned_flag= 1; return FALSE; }
 
   virtual inline void print(String *str, enum_query_type query_type)
   {
@@ -1848,7 +1862,7 @@ public:
   Item_func_bit_count(THD *thd, Item *a): Item_long_func(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "bit_count"; }
-  void fix_length_and_dec() { max_length=2; }
+  bool fix_length_and_dec() { max_length=2; return FALSE; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_bit_count>(thd, this); }
 };
@@ -1901,11 +1915,12 @@ public:
   Item_func_last_insert_id(THD *thd, Item *a): Item_longlong_func(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "last_insert_id"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     unsigned_flag= true;
     if (arg_count)
       max_length= args[0]->max_length;
+    return FALSE;
   }
   bool fix_fields(THD *thd, Item **ref);
   bool check_vcol_func_processor(void *arg)
@@ -1930,7 +1945,7 @@ public:
   {}
   longlong val_int();
   const char *func_name() const { return "benchmark"; }
-  void fix_length_and_dec() { max_length=1; maybe_null=0; }
+  bool fix_length_and_dec() { max_length=1; maybe_null=0; return FALSE; }
   virtual void print(String *str, enum_query_type query_type);
   bool check_vcol_func_processor(void *arg)
   {
@@ -1950,7 +1965,7 @@ class Item_func_sleep :public Item_long_func
   { return args[0]->check_type_can_return_real(func_name()); }
 public:
   Item_func_sleep(THD *thd, Item *a): Item_long_func(thd, a) {}
-  void fix_length_and_dec() { fix_char_length(1); }
+  bool fix_length_and_dec() { fix_char_length(1); return FALSE; }
   bool const_item() const { return 0; }
   const char *func_name() const { return "sleep"; }
   table_map used_tables() const
@@ -2094,7 +2109,7 @@ class Item_func_udf_float :public Item_udf_func
   double val_real();
   String *val_str(String *str);
   const Type_handler *type_handler() const { return &type_handler_double; }
-  void fix_length_and_dec() { fix_num_length_and_dec(); }
+  bool fix_length_and_dec() { fix_num_length_and_dec(); return FALSE; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_udf_float>(thd, this); }
 };
@@ -2112,7 +2127,7 @@ public:
   double val_real() { return (double) Item_func_udf_int::val_int(); }
   String *val_str(String *str);
   const Type_handler *type_handler() const { return &type_handler_longlong; }
-  void fix_length_and_dec() { decimals= 0; max_length= 21; }
+  bool fix_length_and_dec() { decimals= 0; max_length= 21; return FALSE; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_udf_int>(thd, this); }
 };
@@ -2130,7 +2145,7 @@ public:
   my_decimal *val_decimal(my_decimal *);
   String *val_str(String *str);
   const Type_handler *type_handler() const { return &type_handler_newdecimal; }
-  void fix_length_and_dec() { fix_num_length_and_dec(); }
+  bool fix_length_and_dec() { fix_num_length_and_dec(); return FALSE; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_udf_decimal>(thd, this); }
 };
@@ -2169,7 +2184,7 @@ public:
     return dec_buf;
   }
   const Type_handler *type_handler() const { return string_type_handler(); }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_udf_str>(thd, this); }
 };
@@ -2222,7 +2237,7 @@ public:
     { DBUG_ASSERT(fixed == 1); null_value=1; return 0; }
   double val_real() { DBUG_ASSERT(fixed == 1); null_value= 1; return 0.0; }
   longlong val_int() { DBUG_ASSERT(fixed == 1); null_value=1; return 0; }
-  void fix_length_and_dec() { maybe_null=1; max_length=0; }
+  bool fix_length_and_dec() { maybe_null=1; max_length=0; return FALSE; }
 };
 
 #endif /* HAVE_DLOPEN */
@@ -2242,7 +2257,7 @@ class Item_func_get_lock :public Item_long_func
   Item_func_get_lock(THD *thd, Item *a, Item *b) :Item_long_func(thd, a, b) {}
   longlong val_int();
   const char *func_name() const { return "get_lock"; }
-  void fix_length_and_dec() { max_length=1; maybe_null=1;}
+  bool fix_length_and_dec() { max_length=1; maybe_null=1; return FALSE; }
   table_map used_tables() const
   {
     return used_tables_cache | RAND_TABLE_BIT;
@@ -2266,7 +2281,7 @@ public:
   Item_func_release_lock(THD *thd, Item *a): Item_long_func(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "release_lock"; }
-  void fix_length_and_dec() { max_length= 1; maybe_null= 1;}
+  bool fix_length_and_dec() { max_length= 1; maybe_null= 1; return FALSE; }
   table_map used_tables() const
   {
     return used_tables_cache | RAND_TABLE_BIT;
@@ -2303,7 +2318,7 @@ public:
     Item_longlong_func(thd, a, b, c, d) {}
   longlong val_int();
   const char *func_name() const { return "master_pos_wait"; }
-  void fix_length_and_dec() { max_length=21; maybe_null=1;}
+  bool fix_length_and_dec() { max_length=21; maybe_null=1; return FALSE; }
   bool check_vcol_func_processor(void *arg)
   {
     return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
@@ -2328,7 +2343,7 @@ public:
    :Item_long_func(thd, a, b) {}
   longlong val_int();
   const char *func_name() const { return "master_gtid_wait"; }
-  void fix_length_and_dec() { max_length=2; }
+  bool fix_length_and_dec() { max_length=2; return FALSE; }
   bool check_vcol_func_processor(void *arg)
   {
     return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
@@ -2425,7 +2440,7 @@ public:
   void save_item_result(Item *item);
   bool update();
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   void print(String *str, enum_query_type query_type);
   enum precedence precedence() const { return ASSIGN_PRECEDENCE; }
   void print_as_stmt(String *str, enum_query_type query_type);
@@ -2460,7 +2475,7 @@ public:
   longlong val_int();
   my_decimal *val_decimal(my_decimal*);
   String *val_str(String* str);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   virtual void print(String *str, enum_query_type query_type);
   /*
     We must always return variables as strings to guard against selects of type
@@ -2577,7 +2592,7 @@ public:
                            size_t name_len_arg);
   enum Functype functype() const { return GSYSVAR_FUNC; }
   void update_null_value();
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   void print(String *str, enum_query_type query_type);
   bool const_item() const { return true; }
   table_map used_tables() const { return 0; }
@@ -2721,7 +2736,11 @@ public:
   Item_func_is_free_lock(THD *thd, Item *a): Item_long_func(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "is_free_lock"; }
-  void fix_length_and_dec() { decimals=0; max_length=1; maybe_null=1;}
+  bool fix_length_and_dec()
+  {
+    decimals=0; max_length=1; maybe_null=1;
+    return FALSE;
+  }
   bool check_vcol_func_processor(void *arg)
   {
     return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
@@ -2739,7 +2758,11 @@ public:
   Item_func_is_used_lock(THD *thd, Item *a): Item_long_func(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "is_used_lock"; }
-  void fix_length_and_dec() { decimals=0; max_length=10; maybe_null=1;}
+  bool fix_length_and_dec()
+  {
+    decimals=0; max_length=10; maybe_null=1;
+    return FALSE;
+  }
   bool check_vcol_func_processor(void *arg)
   {
     return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
@@ -2788,7 +2811,7 @@ public:
   Item_func_row_count(THD *thd): Item_longlong_func(thd) {}
   longlong val_int();
   const char *func_name() const { return "row_count"; }
-  void fix_length_and_dec() { decimals= 0; maybe_null=0; }
+  bool fix_length_and_dec() { decimals= 0; maybe_null=0; return FALSE; }
   bool check_vcol_func_processor(void *arg)
   {
     return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
@@ -2906,7 +2929,7 @@ public:
   virtual enum Functype functype() const { return FUNC_SP; }
 
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec(void);
+  bool fix_length_and_dec(void);
   bool is_expensive();
 
   inline Field *get_sp_result_field()
@@ -2946,7 +2969,7 @@ public:
   Item_func_found_rows(THD *thd): Item_longlong_func(thd) {}
   longlong val_int();
   const char *func_name() const { return "found_rows"; }
-  void fix_length_and_dec() { decimals= 0; maybe_null=0; }
+  bool fix_length_and_dec() { decimals= 0; maybe_null=0; return FALSE; }
   bool check_vcol_func_processor(void *arg)
   {
     return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
@@ -2989,10 +3012,11 @@ public:
   {
     return mark_unsupported_function(func_name(), "()", arg, VCOL_IMPOSSIBLE);
   }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     maybe_null= null_value= false;
     max_length= 11;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_sqlcode>(thd, this); }
@@ -3008,8 +3032,8 @@ public:
   const char *func_name() const { return "uuid_short"; }
   longlong val_int();
   bool const_item() const { return false; }
-  void fix_length_and_dec()
-  { max_length= 21; unsigned_flag=1; }
+  bool fix_length_and_dec()
+  { max_length= 21; unsigned_flag=1; return FALSE; }
   table_map used_tables() const { return RAND_TABLE_BIT; }
   bool check_vcol_func_processor(void *arg)
   {
@@ -3031,7 +3055,7 @@ public:
   String *val_str(String *);
   my_decimal *val_decimal(my_decimal *);
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "last_value"; }
   const Type_handler *type_handler() const { return last_value->type_handler(); }
   bool eval_not_null_tables(void *)
@@ -3063,11 +3087,12 @@ public:
   Item_longlong_func(thd), table_list(table_list_arg) {}
   longlong val_int();
   const char *func_name() const { return "nextval"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     unsigned_flag= 0;
     max_length= MAX_BIGINT_WIDTH;
     maybe_null= 1;                              /* In case of errors */
+    return FALSE;
   }
   /*
     update_table() function must be called during the value function
diff --git a/sql/item_geofunc.cc b/sql/item_geofunc.cc
index aee44a7a01f..4c2a2fa8b11 100644
--- a/sql/item_geofunc.cc
+++ b/sql/item_geofunc.cc
@@ -40,12 +40,13 @@
 #include "opt_range.h"
 
 
-void Item_geometry_func::fix_length_and_dec()
+bool Item_geometry_func::fix_length_and_dec()
 {
   collation.set(&my_charset_bin);
   decimals=0;
   max_length= (uint32) UINT_MAX32;
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -214,11 +215,12 @@ String *Item_func_as_wkt::val_str_ascii(String *str)
 }
 
 
-void Item_func_as_wkt::fix_length_and_dec()
+bool Item_func_as_wkt::fix_length_and_dec()
 {
   collation.set(default_charset(), DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
   max_length= (uint32) UINT_MAX32;
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -240,11 +242,12 @@ String *Item_func_as_wkb::val_str(String *str)
 }
 
 
-void Item_func_as_geojson::fix_length_and_dec()
+bool Item_func_as_geojson::fix_length_and_dec()
 {
   collation.set(default_charset(), DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
   max_length=MAX_BLOB_WIDTH;
   maybe_null= 1;
+  return FALSE;
 }
 
 
diff --git a/sql/item_geofunc.h b/sql/item_geofunc.h
index 8101433abb5..0e727829ce7 100644
--- a/sql/item_geofunc.h
+++ b/sql/item_geofunc.h
@@ -38,7 +38,7 @@ public:
   Item_geometry_func(THD *thd, Item *a, Item *b, Item *c):
     Item_str_func(thd, a, b, c) {}
   Item_geometry_func(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const Type_handler *type_handler() const { return &type_handler_geometry; }
 };
 
@@ -253,7 +253,7 @@ public:
    :Item_str_ascii_func_args_geometry(thd, a) {}
   const char *func_name() const { return "st_astext"; }
   String *val_str_ascii(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_as_wkt>(thd, this); }
 };
@@ -266,12 +266,13 @@ public:
   const char *func_name() const { return "st_aswkb"; }
   String *val_str(String *);
   const Type_handler *type_handler() const { return &type_handler_long_blob; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation.set(&my_charset_bin);
     decimals=0;
     max_length= (uint32) UINT_MAX32;
     maybe_null= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_as_wkb>(thd, this); }
@@ -294,7 +295,7 @@ public:
   Item_func_as_geojson(THD *thd, Item *js, Item *max_dec_digits, Item *opt)
    :Item_str_ascii_func_args_geometry(thd, js, max_dec_digits, opt) {}
   const char *func_name() const { return "st_asgeojson"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str_ascii(String *);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_as_geojson>(thd, this); }
@@ -308,11 +309,12 @@ public:
    :Item_str_ascii_func_args_geometry(thd, a) {}
   String *val_str_ascii(String *);
   const char *func_name() const { return "st_geometrytype"; }
-  void fix_length_and_dec() 
+  bool fix_length_and_dec()
   {
     // "GeometryCollection" is the longest
     fix_length_and_charset(20, default_charset());
     maybe_null= 1;
+    return FALSE;
   };
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_geometry_type>(thd, this); }
@@ -504,9 +506,10 @@ public:
     item_type=it;
   }
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    Item_geometry_func::fix_length_and_dec();
+    if (Item_geometry_func::fix_length_and_dec())
+      return TRUE;
     for (unsigned int i= 0; i < arg_count; ++i)
     {
       if (args[i]->fixed && args[i]->field_type() != MYSQL_TYPE_GEOMETRY)
@@ -516,8 +519,10 @@ public:
         str.append('\0');
         my_error(ER_ILLEGAL_VALUE_FOR_TYPE, MYF(0), "non geometric",
                  str.ptr());
+        return TRUE;
       }
     }
+    return FALSE;
   }
  
   const char *func_name() const { return "geometrycollection"; }
@@ -727,7 +732,7 @@ public:
    :Item_bool_func_args_geometry(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "st_isempty"; }
-  void fix_length_and_dec() { maybe_null= 1; }
+  bool fix_length_and_dec() { maybe_null= 1; return FALSE; }
   bool need_parentheses_in_default() { return false; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_isempty>(thd, this); }
@@ -744,7 +749,7 @@ public:
    :Item_long_func_args_geometry(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "st_issimple"; }
-  void fix_length_and_dec() { decimals=0; max_length=2; }
+  bool fix_length_and_dec() { decimals=0; max_length=2; return FALSE; }
   uint decimal_precision() const { return 1; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_issimple>(thd, this); }
@@ -757,7 +762,7 @@ public:
    :Item_long_func_args_geometry(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "st_isclosed"; }
-  void fix_length_and_dec() { decimals=0; max_length=2; }
+  bool fix_length_and_dec() { decimals=0; max_length=2; return FALSE; }
   uint decimal_precision() const { return 1; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_isclosed>(thd, this); }
@@ -780,7 +785,7 @@ public:
    :Item_long_func_args_geometry(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "st_dimension"; }
-  void fix_length_and_dec() { max_length= 10; maybe_null= 1; }
+  bool fix_length_and_dec() { max_length= 10; maybe_null= 1; return FALSE; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_dimension>(thd, this); }
 };
@@ -792,10 +797,12 @@ public:
   Item_func_x(THD *thd, Item *a): Item_real_func_args_geometry(thd, a) {}
   double val_real();
   const char *func_name() const { return "st_x"; }
-  void fix_length_and_dec() 
-  { 
-    Item_real_func::fix_length_and_dec();
-    maybe_null= 1; 
+  bool fix_length_and_dec()
+  {
+    if (Item_real_func::fix_length_and_dec())
+      return TRUE;
+    maybe_null= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_x>(thd, this); }
@@ -808,10 +815,12 @@ public:
   Item_func_y(THD *thd, Item *a): Item_real_func_args_geometry(thd, a) {}
   double val_real();
   const char *func_name() const { return "st_y"; }
-  void fix_length_and_dec() 
-  { 
-    Item_real_func::fix_length_and_dec();
-    maybe_null= 1; 
+  bool fix_length_and_dec()
+  {
+    if (Item_real_func::fix_length_and_dec())
+      return TRUE;
+    maybe_null= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_y>(thd, this); }
@@ -825,7 +834,7 @@ public:
    :Item_long_func_args_geometry(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "st_numgeometries"; }
-  void fix_length_and_dec() { max_length= 10; maybe_null= 1; }
+  bool fix_length_and_dec() { max_length= 10; maybe_null= 1; return FALSE; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_numgeometries>(thd, this); }
 };
@@ -838,7 +847,7 @@ public:
    :Item_long_func_args_geometry(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "st_numinteriorrings"; }
-  void fix_length_and_dec() { max_length= 10; maybe_null= 1; }
+  bool fix_length_and_dec() { max_length= 10; maybe_null= 1; return FALSE; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_numinteriorring>(thd, this); }
 };
@@ -851,7 +860,7 @@ public:
    :Item_long_func_args_geometry(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "st_numpoints"; }
-  void fix_length_and_dec() { max_length= 10; maybe_null= 1; }
+  bool fix_length_and_dec() { max_length= 10; maybe_null= 1; return FALSE; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_numpoints>(thd, this); }
 };
@@ -863,10 +872,12 @@ public:
   Item_func_area(THD *thd, Item *a): Item_real_func_args_geometry(thd, a) {}
   double val_real();
   const char *func_name() const { return "st_area"; }
-  void fix_length_and_dec() 
-  { 
-    Item_real_func::fix_length_and_dec();
-    maybe_null= 1; 
+  bool fix_length_and_dec()
+  {
+    if (Item_real_func::fix_length_and_dec())
+      return TRUE;
+    maybe_null= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_area>(thd, this); }
@@ -881,10 +892,12 @@ public:
    :Item_real_func_args_geometry(thd, a) {}
   double val_real();
   const char *func_name() const { return "st_length"; }
-  void fix_length_and_dec() 
-  { 
-    Item_real_func::fix_length_and_dec();
-    maybe_null= 1; 
+  bool fix_length_and_dec()
+  {
+    if (Item_real_func::fix_length_and_dec())
+      return TRUE;
+    maybe_null= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_glength>(thd, this); }
@@ -898,7 +911,7 @@ public:
    :Item_long_func_args_geometry(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "srid"; }
-  void fix_length_and_dec() { max_length= 10; maybe_null= 1; }
+  bool fix_length_and_dec() { max_length= 10; maybe_null= 1; return FALSE; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_srid>(thd, this); }
 };
@@ -944,7 +957,7 @@ class Item_func_gis_debug: public Item_long_func
   public:
     Item_func_gis_debug(THD *thd, Item *a): Item_long_func(thd, a)
     { null_value= false; }
-    void fix_length_and_dec() { fix_char_length(10); }
+    bool fix_length_and_dec() { fix_char_length(10); return FALSE; }
     const char *func_name() const  { return "st_gis_debug"; }
     longlong val_int();
     bool check_vcol_func_processor(void *arg)
diff --git a/sql/item_inetfunc.h b/sql/item_inetfunc.h
index d934cef43dd..024ff8ce4f0 100644
--- a/sql/item_inetfunc.h
+++ b/sql/item_inetfunc.h
@@ -32,12 +32,13 @@ public:
   Item_func_inet_aton(THD *thd, Item *a): Item_longlong_func(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "inet_aton"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals= 0;
     max_length= 21;
     maybe_null= 1;
     unsigned_flag= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_inet_aton>(thd, this); }
@@ -55,11 +56,12 @@ public:
   { }
   String* val_str(String* str);
   const char *func_name() const { return "inet_ntoa"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals= 0;
     fix_length_and_charset(3 * 8 + 7, default_charset());
     maybe_null= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_inet_ntoa>(thd, this); }
@@ -124,11 +126,12 @@ public:
   virtual const char *func_name() const
   { return "inet6_aton"; }
 
-  virtual void fix_length_and_dec()
+  virtual bool fix_length_and_dec()
   {
     decimals= 0;
     fix_length_and_charset(16, &my_charset_bin);
     maybe_null= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_inet6_aton>(thd, this); }
@@ -153,7 +156,7 @@ public:
   virtual const char *func_name() const
   { return "inet6_ntoa"; }
 
-  virtual void fix_length_and_dec()
+  virtual bool fix_length_and_dec()
   {
     decimals= 0;
 
@@ -163,6 +166,7 @@ public:
     fix_length_and_charset(8 * 4 + 7, default_charset());
 
     maybe_null= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_inet6_ntoa>(thd, this); }
diff --git a/sql/item_jsonfunc.cc b/sql/item_jsonfunc.cc
index e67357000da..52042c56fcc 100644
--- a/sql/item_jsonfunc.cc
+++ b/sql/item_jsonfunc.cc
@@ -388,11 +388,13 @@ longlong Item_func_json_valid::val_int()
 }
 
 
-void Item_func_json_exists::fix_length_and_dec()
+bool Item_func_json_exists::fix_length_and_dec()
 {
-  Item_bool_func::fix_length_and_dec();
+  if (Item_bool_func::fix_length_and_dec())
+    return TRUE;
   maybe_null= 1;
   path.set_constant_flag(args[1]->const_item());
+  return FALSE;
 }
 
 
@@ -439,12 +441,13 @@ err_return:
 }
 
 
-void Item_func_json_value::fix_length_and_dec()
+bool Item_func_json_value::fix_length_and_dec()
 {
   collation.set(args[0]->collation);
   max_length= args[0]->max_length;
   path.set_constant_flag(args[1]->const_item());
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -546,7 +549,7 @@ bool Item_func_json_query::check_and_get_value(json_engine_t *je, String *res,
 }
 
 
-void Item_func_json_quote::fix_length_and_dec()
+bool Item_func_json_quote::fix_length_and_dec()
 {
   collation.set(&my_charset_utf8mb4_bin);
   /*
@@ -554,6 +557,7 @@ void Item_func_json_quote::fix_length_and_dec()
     of the argument turn into '\uXXXX\uXXXX', which is 12.
   */
   max_length= args[0]->max_length * 12 + 2;
+  return FALSE;
 }
 
 
@@ -581,12 +585,13 @@ String *Item_func_json_quote::val_str(String *str)
 }
 
 
-void Item_func_json_unquote::fix_length_and_dec()
+bool Item_func_json_unquote::fix_length_and_dec()
 {
   collation.set(&my_charset_utf8_general_ci,
                 DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
   max_length= args[0]->max_length;
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -702,13 +707,14 @@ void Item_json_str_multipath::cleanup()
 }
 
 
-void Item_func_json_extract::fix_length_and_dec()
+bool Item_func_json_extract::fix_length_and_dec()
 {
   collation.set(args[0]->collation);
   max_length= args[0]->max_length * (arg_count - 1);
 
   mark_constant_paths(paths, args+1, arg_count-1);
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -937,14 +943,14 @@ double Item_func_json_extract::val_real()
 }
 
 
-void Item_func_json_contains::fix_length_and_dec()
+bool Item_func_json_contains::fix_length_and_dec()
 {
   a2_constant= args[1]->const_item();
   a2_parsed= FALSE;
   maybe_null= 1;
   if (arg_count > 2)
     path.set_constant_flag(args[2]->const_item());
-  Item_bool_func::fix_length_and_dec();
+  return Item_bool_func::fix_length_and_dec();
 }
 
 
@@ -1190,13 +1196,13 @@ bool Item_func_json_contains_path::fix_fields(THD *thd, Item **ref)
 }
 
 
-void Item_func_json_contains_path::fix_length_and_dec()
+bool Item_func_json_contains_path::fix_length_and_dec()
 {
   ooa_constant= args[1]->const_item();
   ooa_parsed= FALSE;
   maybe_null= 1;
   mark_constant_paths(paths, args+2, arg_count-2);
-  Item_bool_func::fix_length_and_dec();
+  return Item_bool_func::fix_length_and_dec();
 }
 
 
@@ -1455,7 +1461,7 @@ append_null:
 }
 
 
-void Item_func_json_array::fix_length_and_dec()
+bool Item_func_json_array::fix_length_and_dec()
 {
   ulonglong char_length= 2;
   uint n_arg;
@@ -1468,17 +1474,18 @@ void Item_func_json_array::fix_length_and_dec()
                   DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
     tmp_val.set_charset(&my_charset_utf8_general_ci);
     max_length= 2;
-    return;
+    return FALSE;
   }
 
   if (agg_arg_charsets_for_string_result(collation, args, arg_count))
-    return;
+    return TRUE;
 
   for (n_arg=0 ; n_arg < arg_count ; n_arg++)
     char_length+= args[n_arg]->max_char_length() + 4;
 
   fix_char_length_ulonglong(char_length);
   tmp_val.set_charset(collation.collation);
+  return FALSE;
 }
 
 
@@ -1522,7 +1529,7 @@ err_return:
 }
 
 
-void Item_func_json_array_append::fix_length_and_dec()
+bool Item_func_json_array_append::fix_length_and_dec()
 {
   uint n_arg;
   ulonglong char_length;
@@ -1537,6 +1544,7 @@ void Item_func_json_array_append::fix_length_and_dec()
   }
 
   fix_char_length_ulonglong(char_length);
+  return FALSE;
 }
 
 
@@ -2124,12 +2132,13 @@ null_return:
 }
 
 
-void Item_func_json_length::fix_length_and_dec()
+bool Item_func_json_length::fix_length_and_dec()
 {
   if (arg_count > 1)
     path.set_constant_flag(args[1]->const_item());
   maybe_null= 1;
   max_length= 10;
+  return FALSE;
 }
 
 
@@ -2269,11 +2278,12 @@ longlong Item_func_json_depth::val_int()
 }
 
 
-void Item_func_json_type::fix_length_and_dec()
+bool Item_func_json_type::fix_length_and_dec()
 {
   collation.set(&my_charset_utf8_general_ci);
   max_length= 12;
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -2326,7 +2336,7 @@ error:
 }
 
 
-void Item_func_json_insert::fix_length_and_dec()
+bool Item_func_json_insert::fix_length_and_dec()
 {
   uint n_arg;
   ulonglong char_length;
@@ -2342,6 +2352,7 @@ void Item_func_json_insert::fix_length_and_dec()
 
   fix_char_length_ulonglong(char_length);
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -2586,13 +2597,14 @@ return_null:
 }
 
 
-void Item_func_json_remove::fix_length_and_dec()
+bool Item_func_json_remove::fix_length_and_dec()
 {
   collation.set(args[0]->collation);
   max_length= args[0]->max_length;
 
   mark_constant_paths(paths, args+1, arg_count-1);
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -2772,13 +2784,14 @@ null_return:
 }
 
 
-void Item_func_json_keys::fix_length_and_dec()
+bool Item_func_json_keys::fix_length_and_dec()
 {
   collation.set(args[0]->collation);
   max_length= args[0]->max_length;
   maybe_null= 1;
   if (arg_count > 1)
     path.set_constant_flag(args[1]->const_item());
+  return FALSE;
 }
 
 
@@ -2939,7 +2952,7 @@ bool Item_func_json_search::fix_fields(THD *thd, Item **ref)
 
 static const uint SQR_MAX_BLOB_WIDTH= (uint) sqrt(MAX_BLOB_WIDTH);
 
-void Item_func_json_search::fix_length_and_dec()
+bool Item_func_json_search::fix_length_and_dec()
 {
   collation.set(args[0]->collation);
 
@@ -2961,6 +2974,7 @@ void Item_func_json_search::fix_length_and_dec()
   if (arg_count > 4)
     mark_constant_paths(paths, args+4, arg_count-4);
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -3138,11 +3152,12 @@ const char *Item_func_json_format::func_name() const
 }
 
 
-void Item_func_json_format::fix_length_and_dec()
+bool Item_func_json_format::fix_length_and_dec()
 {
   decimals= 0;
   max_length= args[0]->max_length;
   maybe_null= 1;
+  return FALSE;
 }
 
 
diff --git a/sql/item_jsonfunc.h b/sql/item_jsonfunc.h
index 354de69eee4..af0995b9605 100644
--- a/sql/item_jsonfunc.h
+++ b/sql/item_jsonfunc.h
@@ -49,10 +49,12 @@ public:
   Item_func_json_valid(THD *thd, Item *json) : Item_bool_func(thd, json) {}
   longlong val_int();
   const char *func_name() const { return "json_valid"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    Item_bool_func::fix_length_and_dec();
+    if (Item_bool_func::fix_length_and_dec())
+      return TRUE;
     maybe_null= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_json_valid>(thd, this); }
@@ -69,7 +71,7 @@ public:
   Item_func_json_exists(THD *thd, Item *js, Item *i_path):
     Item_bool_func(thd, js, i_path) {}
   const char *func_name() const { return "json_exists"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_json_exists>(thd, this); }
   longlong val_int();
@@ -86,7 +88,7 @@ public:
   Item_func_json_value(THD *thd, Item *js, Item *i_path):
     Item_str_func(thd, js, i_path) {}
   const char *func_name() const { return "json_value"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *);
   virtual bool check_and_get_value(json_engine_t *je, String *res, int *error);
   Item *get_copy(THD *thd)
@@ -115,7 +117,7 @@ protected:
 public:
   Item_func_json_quote(THD *thd, Item *s): Item_str_func(thd, s) {}
   const char *func_name() const { return "json_quote"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_json_quote>(thd, this); }
@@ -130,7 +132,7 @@ protected:
 public:
   Item_func_json_unquote(THD *thd, Item *s): Item_str_func(thd, s) {}
   const char *func_name() const { return "json_unquote"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_json_unquote>(thd, this); }
@@ -163,7 +165,7 @@ public:
     Item_json_str_multipath(thd, list) {}
   const char *func_name() const { return "json_extract"; }
   enum Functype functype() const   { return JSON_EXTRACT_FUNC; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *);
   longlong val_int();
   double val_real();
@@ -185,7 +187,7 @@ public:
   Item_func_json_contains(THD *thd, List<Item> &list):
     Item_bool_func(thd, list) {}
   const char *func_name() const { return "json_contains"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   longlong val_int();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_json_contains>(thd, this); }
@@ -207,7 +209,7 @@ public:
     Item_bool_func(thd, list), tmp_paths(0) {}
   const char *func_name() const { return "json_contains_path"; }
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   void cleanup();
   longlong val_int();
   Item *get_copy(THD *thd)
@@ -227,7 +229,7 @@ public:
     Item_str_func(thd, list) {}
   String *val_str(String *);
   bool is_json_type() { return true; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "json_array"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_json_array>(thd, this); }
@@ -242,7 +244,7 @@ protected:
 public:
   Item_func_json_array_append(THD *thd, List<Item> &list):
     Item_json_str_multipath(thd, list) {}
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *);
   uint get_n_paths() const { return arg_count/2; }
   const char *func_name() const { return "json_array_append"; }
@@ -309,7 +311,7 @@ public:
   Item_func_json_length(THD *thd, List<Item> &list):
     Item_long_func(thd, list) {}
   const char *func_name() const { return "json_length"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   longlong val_int();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_json_length>(thd, this); }
@@ -325,7 +327,7 @@ protected:
 public:
   Item_func_json_depth(THD *thd, Item *js): Item_long_func(thd, js) {}
   const char *func_name() const { return "json_depth"; }
-  void fix_length_and_dec() { max_length= 10; }
+  bool fix_length_and_dec() { max_length= 10; return FALSE; }
   longlong val_int();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_json_depth>(thd, this); }
@@ -339,7 +341,7 @@ protected:
 public:
   Item_func_json_type(THD *thd, Item *js): Item_str_func(thd, js) {}
   const char *func_name() const { return "json_type"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_json_type>(thd, this); }
@@ -356,7 +358,7 @@ public:
   Item_func_json_insert(bool i_mode, bool r_mode, THD *thd, List<Item> &list):
     Item_json_str_multipath(thd, list),
       mode_insert(i_mode), mode_replace(r_mode) {}
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *);
   uint get_n_paths() const { return arg_count/2; }
   const char *func_name() const
@@ -376,7 +378,7 @@ protected:
 public:
   Item_func_json_remove(THD *thd, List<Item> &list):
     Item_json_str_multipath(thd, list) {}
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *);
   uint get_n_paths() const { return arg_count - 1; }
   const char *func_name() const { return "json_remove"; }
@@ -395,7 +397,7 @@ public:
   Item_func_json_keys(THD *thd, List<Item> &list):
     Item_str_func(thd, list) {}
   const char *func_name() const { return "json_keys"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_json_keys>(thd, this); }
@@ -419,7 +421,7 @@ public:
     Item_json_str_multipath(thd, list) {}
   const char *func_name() const { return "json_search"; }
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *);
   uint get_n_paths() const { return arg_count > 4 ? arg_count - 4 : 0; }
   Item *get_copy(THD *thd)
@@ -447,7 +449,7 @@ public:
     Item_str_func(thd, list), fmt(DETAILED) {}
 
   const char *func_name() const;
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str(String *str);
   String *val_json(String *str);
   bool is_json_type() { return true; }
diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc
index 6af49d494d4..c914c6cbdf8 100644
--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -188,10 +188,11 @@ String *Item_func_sha::val_str_ascii(String *str)
   return 0;
 }
 
-void Item_func_sha::fix_length_and_dec()
+bool Item_func_sha::fix_length_and_dec()
 {
   // size of hex representation of hash
   fix_length_and_charset(MY_SHA1_HASH_SIZE * 2, default_charset());
+  return FALSE;
 }
 
 String *Item_func_sha2::val_str_ascii(String *str)
@@ -267,7 +268,7 @@ String *Item_func_sha2::val_str_ascii(String *str)
 }
 
 
-void Item_func_sha2::fix_length_and_dec()
+bool Item_func_sha2::fix_length_and_dec()
 {
   maybe_null= 1;
   max_length = 0;
@@ -292,6 +293,7 @@ void Item_func_sha2::fix_length_and_dec()
                         ER_THD(thd, ER_WRONG_PARAMETERS_TO_NATIVE_FCT),
                         "sha2");
   }
+  return FALSE;
 }
 
 /* Implementation of AES encryption routines */
@@ -344,23 +346,25 @@ String *Item_aes_crypt::val_str(String *str2)
   return 0;
 }
 
-void Item_func_aes_encrypt::fix_length_and_dec()
+bool Item_func_aes_encrypt::fix_length_and_dec()
 {
   max_length=my_aes_get_size(MY_AES_ECB, args[0]->max_length);
   what= ENCRYPTION_FLAG_ENCRYPT;
+  return FALSE;
 }
 
 
 
-void Item_func_aes_decrypt::fix_length_and_dec()
+bool Item_func_aes_decrypt::fix_length_and_dec()
 {
   max_length=args[0]->max_length;
   maybe_null= 1;
   what= ENCRYPTION_FLAG_DECRYPT;
+  return FALSE;
 }
 
 
-void Item_func_to_base64::fix_length_and_dec()
+bool Item_func_to_base64::fix_length_and_dec()
 {
   maybe_null= args[0]->maybe_null;
   collation.set(default_charset(), DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
@@ -375,6 +379,7 @@ void Item_func_to_base64::fix_length_and_dec()
     DBUG_ASSERT(length > 0);
     fix_char_length_ulonglong((ulonglong) length - 1);
   }
+  return FALSE;
 }
 
 
@@ -410,7 +415,7 @@ String *Item_func_to_base64::val_str_ascii(String *str)
 }
 
 
-void Item_func_from_base64::fix_length_and_dec()
+bool Item_func_from_base64::fix_length_and_dec()
 {
   if (args[0]->max_length > (uint) my_base64_decode_max_arg_length())
   {
@@ -422,6 +427,7 @@ void Item_func_from_base64::fix_length_and_dec()
     fix_char_length_ulonglong((ulonglong) length);
   }
   maybe_null= 1; // Can be NULL, e.g. in case of badly formed input string
+  return FALSE;
 }
 
 
@@ -670,17 +676,18 @@ bool Item_func_concat::append_value(THD *thd, String *res, const String *app)
 }
 
 
-void Item_func_concat::fix_length_and_dec()
+bool Item_func_concat::fix_length_and_dec()
 {
   ulonglong char_length= 0;
 
   if (agg_arg_charsets_for_string_result(collation, args, arg_count))
-    return;
+    return TRUE;
 
   for (uint i=0 ; i < arg_count ; i++)
     char_length+= args[i]->max_char_length();
 
   fix_char_length_ulonglong(char_length);
+  return FALSE;
 }
 
 /**
@@ -1032,12 +1039,12 @@ null:
 }
 
 
-void Item_func_concat_ws::fix_length_and_dec()
+bool Item_func_concat_ws::fix_length_and_dec()
 {
   ulonglong char_length;
 
   if (agg_arg_charsets_for_string_result(collation, args, arg_count))
-    return;
+    return TRUE;
 
   /*
      arg_count cannot be less than 2,
@@ -1049,6 +1056,7 @@ void Item_func_concat_ws::fix_length_and_dec()
     char_length+= args[i]->max_char_length();
 
   fix_char_length_ulonglong(char_length);
+  return FALSE;
 }
 
 
@@ -1102,11 +1110,13 @@ String *Item_func_reverse::val_str(String *str)
 }
 
 
-void Item_func_reverse::fix_length_and_dec()
+bool Item_func_reverse::fix_length_and_dec()
 {
-  agg_arg_charsets_for_string_result(collation, args, 1);
+  if (agg_arg_charsets_for_string_result(collation, args, 1))
+    return TRUE;
   DBUG_ASSERT(collation.collation != NULL);
   fix_char_length(args[0]->max_char_length());
+  return FALSE;
 }
 
 /**
@@ -1259,7 +1269,7 @@ null:
 }
 
 
-void Item_func_replace::fix_length_and_dec()
+bool Item_func_replace::fix_length_and_dec()
 {
   ulonglong char_length= (ulonglong) args[0]->max_char_length();
   int diff=(int) (args[2]->max_char_length() - args[1]->max_char_length());
@@ -1270,8 +1280,9 @@ void Item_func_replace::fix_length_and_dec()
   }
 
   if (agg_arg_charsets_for_string_result_with_comparison(collation, args, 3))
-    return;
+    return TRUE;
   fix_char_length_ulonglong(char_length);
+  return FALSE;
 }
 
 
@@ -1283,13 +1294,14 @@ bool Item_func_regexp_replace::fix_fields(THD *thd, Item **ref)
 }
 
 
-void Item_func_regexp_replace::fix_length_and_dec()
+bool Item_func_regexp_replace::fix_length_and_dec()
 {
   if (agg_arg_charsets_for_string_result_with_comparison(collation, args, 3))
-    return;
+    return TRUE;
   max_length= MAX_BLOB_WIDTH;
   re.init(collation.collation, 0);
   re.fix_owner(this, args[0], args[1]);
+  return FALSE;
 }
 
 
@@ -1425,13 +1437,14 @@ bool Item_func_regexp_substr::fix_fields(THD *thd, Item **ref)
 }
 
 
-void Item_func_regexp_substr::fix_length_and_dec()
+bool Item_func_regexp_substr::fix_length_and_dec()
 {
   if (agg_arg_charsets_for_string_result_with_comparison(collation, args, 2))
-    return;
+    return TRUE;
   fix_char_length(args[0]->max_char_length());
   re.init(collation.collation, 0);
   re.fix_owner(this, args[0], args[1]);
+  return FALSE;
 }
 
 
@@ -1539,16 +1552,17 @@ null:
 }
 
 
-void Item_func_insert::fix_length_and_dec()
+bool Item_func_insert::fix_length_and_dec()
 {
   ulonglong char_length;
 
   // Handle character set for args[0] and args[3].
   if (agg_arg_charsets_for_string_result(collation, args, 2, 3))
-    return;
+    return TRUE;
   char_length= ((ulonglong) args[0]->max_char_length() +
                 (ulonglong) args[3]->max_char_length());
   fix_char_length_ulonglong(char_length);
+  return FALSE;
 }
 
 
@@ -1585,22 +1599,26 @@ String *Item_str_conv::val_str(String *str)
 }
 
 
-void Item_func_lcase::fix_length_and_dec()
+bool Item_func_lcase::fix_length_and_dec()
 {
-  agg_arg_charsets_for_string_result(collation, args, 1);
+  if (agg_arg_charsets_for_string_result(collation, args, 1))
+    return TRUE;
   DBUG_ASSERT(collation.collation != NULL);
   multiply= collation.collation->casedn_multiply;
   converter= collation.collation->cset->casedn;
   fix_char_length_ulonglong((ulonglong) args[0]->max_char_length() * multiply);
+  return FALSE;
 }
 
-void Item_func_ucase::fix_length_and_dec()
+bool Item_func_ucase::fix_length_and_dec()
 {
-  agg_arg_charsets_for_string_result(collation, args, 1);
+  if (agg_arg_charsets_for_string_result(collation, args, 1))
+    return TRUE;
   DBUG_ASSERT(collation.collation != NULL);
   multiply= collation.collation->caseup_multiply;
   converter= collation.collation->cset->caseup;
   fix_char_length_ulonglong((ulonglong) args[0]->max_char_length() * multiply);
+  return FALSE;
 }
 
 
@@ -1643,11 +1661,13 @@ void Item_str_func::left_right_max_length()
 }
 
 
-void Item_func_left::fix_length_and_dec()
+bool Item_func_left::fix_length_and_dec()
 {
-  agg_arg_charsets_for_string_result(collation, args, 1);
+  if (agg_arg_charsets_for_string_result(collation, args, 1))
+    return TRUE;
   DBUG_ASSERT(collation.collation != NULL);
   left_right_max_length();
+  return FALSE;
 }
 
 
@@ -1677,11 +1697,13 @@ String *Item_func_right::val_str(String *str)
 }
 
 
-void Item_func_right::fix_length_and_dec()
+bool Item_func_right::fix_length_and_dec()
 {
-  agg_arg_charsets_for_string_result(collation, args, 1);
+  if (agg_arg_charsets_for_string_result(collation, args, 1))
+    return TRUE;
   DBUG_ASSERT(collation.collation != NULL);
   left_right_max_length();
+  return FALSE;
 }
 
 
@@ -1732,11 +1754,12 @@ String *Item_func_substr::val_str(String *str)
 }
 
 
-void Item_func_substr::fix_length_and_dec()
+bool Item_func_substr::fix_length_and_dec()
 {
   max_length=args[0]->max_length;
 
-  agg_arg_charsets_for_string_result(collation, args, 1);
+  if (agg_arg_charsets_for_string_result(collation, args, 1))
+    return TRUE;
   DBUG_ASSERT(collation.collation != NULL);
   if (args[1]->const_item())
   {
@@ -1757,14 +1780,16 @@ void Item_func_substr::fix_length_and_dec()
       set_if_smaller(max_length,(uint) length);
   }
   max_length*= collation.collation->mbmaxlen;
+  return FALSE;
 }
 
 
-void Item_func_substr_index::fix_length_and_dec()
-{ 
+bool Item_func_substr_index::fix_length_and_dec()
+{
   if (agg_arg_charsets_for_string_result_with_comparison(collation, args, 2))
-    return;
+    return TRUE;
   fix_char_length(args[0]->max_char_length());
+  return FALSE;
 }
 
 
@@ -2088,11 +2113,12 @@ String *Item_func_trim::val_str(String *str)
   return trimmed_value(res, (uint32) (ptr - res->ptr()), (uint32) (end - ptr));
 }
 
-void Item_func_trim::fix_length_and_dec()
+bool Item_func_trim::fix_length_and_dec()
 {
   if (arg_count == 1)
   {
-    agg_arg_charsets_for_string_result(collation, args, 1);
+    if (agg_arg_charsets_for_string_result(collation, args, 1))
+      return TRUE;
     DBUG_ASSERT(collation.collation != NULL);
     remove.set_charset(collation.collation);
     remove.set_ascii(" ",1);
@@ -2103,9 +2129,10 @@ void Item_func_trim::fix_length_and_dec()
     // Note that we pass args[1] as the first item, and args[0] as the second.
     if (agg_arg_charsets_for_string_result_with_comparison(collation,
                                                            &args[1], 2, -1))
-      return;
+      return TRUE;
   }
   fix_char_length(args[0]->max_char_length());
+  return FALSE;
 }
 
 void Item_func_trim::print(String *str, enum_query_type query_type)
@@ -2245,7 +2272,7 @@ bool Item_func_encode::seed()
   return FALSE;
 }
 
-void Item_func_encode::fix_length_and_dec()
+bool Item_func_encode::fix_length_and_dec()
 {
   max_length=args[0]->max_length;
   maybe_null=args[0]->maybe_null || args[1]->maybe_null;
@@ -2253,6 +2280,7 @@ void Item_func_encode::fix_length_and_dec()
   /* Precompute the seed state if the item is constant. */
   seeded= args[1]->const_item() &&
           (args[1]->result_type() == STRING_RESULT) && !seed();
+  return FALSE;
 }
 
 String *Item_func_encode::val_str(String *str)
@@ -2417,13 +2445,15 @@ bool Item_func_current_role::fix_fields(THD *thd, Item **ref)
   return 0;
 }
 
-void Item_func_soundex::fix_length_and_dec()
+bool Item_func_soundex::fix_length_and_dec()
 {
   uint32 char_length= args[0]->max_char_length();
-  agg_arg_charsets_for_string_result(collation, args, 1);
+  if (agg_arg_charsets_for_string_result(collation, args, 1))
+    return TRUE;
   DBUG_ASSERT(collation.collation != NULL);
   set_if_bigger(char_length, 4);
   fix_char_length(char_length);
+  return FALSE;
 }
 
 
@@ -2581,7 +2611,7 @@ String *Item_func_soundex::val_str(String *str)
 const int FORMAT_MAX_DECIMALS= 30;
 
 
-void Item_func_format::fix_length_and_dec()
+bool Item_func_format::fix_length_and_dec()
 {
   uint32 char_length= args[0]->max_char_length();
   uint32 max_sep_count= (char_length / 3) + (decimals ? 1 : 0) + /*sign*/1;
@@ -2591,6 +2621,7 @@ void Item_func_format::fix_length_and_dec()
     locale= args[2]->basic_const_item() ? args[2]->locale_from_val_str() : NULL;
   else
     locale= &my_locale_en_US; /* Two arguments */
+  return FALSE;
 }
 
 
@@ -2704,13 +2735,13 @@ String *Item_func_format::val_str_ascii(String *str)
 }
 
 
-void Item_func_elt::fix_length_and_dec()
+bool Item_func_elt::fix_length_and_dec()
 {
   uint32 char_length= 0;
   decimals=0;
 
   if (agg_arg_charsets_for_string_result(collation, args + 1, arg_count - 1))
-    return;
+    return TRUE;
 
   for (uint i= 1 ; i < arg_count ; i++)
   {
@@ -2719,6 +2750,7 @@ void Item_func_elt::fix_length_and_dec()
   }
   fix_char_length(char_length);
   maybe_null=1;					// NULL if wrong first arg
+  return FALSE;
 }
 
 
@@ -2765,16 +2797,17 @@ String *Item_func_elt::val_str(String *str)
 }
 
 
-void Item_func_make_set::fix_length_and_dec()
+bool Item_func_make_set::fix_length_and_dec()
 {
   uint32 char_length= arg_count - 2; /* Separators */
 
   if (agg_arg_charsets_for_string_result(collation, args + 1, arg_count - 1))
-    return;
+    return TRUE;
   
   for (uint i=1 ; i < arg_count ; i++)
     char_length+= args[i]->max_char_length();
   fix_char_length(char_length);
+  return FALSE;
 }
 
 
@@ -2927,9 +2960,10 @@ inline String* alloc_buffer(String *res,String *str,String *tmp_value,
 }
 
 
-void Item_func_repeat::fix_length_and_dec()
+bool Item_func_repeat::fix_length_and_dec()
 {
-  agg_arg_charsets_for_string_result(collation, args, 1);
+  if (agg_arg_charsets_for_string_result(collation, args, 1))
+    return TRUE;
   DBUG_ASSERT(collation.collation != NULL);
   if (args[1]->const_item())
   {
@@ -2951,6 +2985,7 @@ void Item_func_repeat::fix_length_and_dec()
     max_length= MAX_BLOB_WIDTH;
     maybe_null= 1;
   }
+  return FALSE;
 }
 
 /**
@@ -3012,7 +3047,7 @@ err:
 }
 
 
-void Item_func_space::fix_length_and_dec()
+bool Item_func_space::fix_length_and_dec()
 {
   collation.set(default_charset(), DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
   if (args[0]->const_item())
@@ -3028,12 +3063,13 @@ void Item_func_space::fix_length_and_dec()
     if (count > INT_MAX32)
       count= INT_MAX32;
     fix_char_length_ulonglong(count);
-    return;
+    return FALSE;
   }
 
 end:
   max_length= MAX_BLOB_WIDTH;
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -3083,11 +3119,12 @@ err:
 }
 
 
-void Item_func_binlog_gtid_pos::fix_length_and_dec()
+bool Item_func_binlog_gtid_pos::fix_length_and_dec()
 {
   collation.set(system_charset_info);
   max_length= MAX_BLOB_WIDTH;
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -3123,18 +3160,18 @@ err:
 }
 
 
-void Item_func_pad::fix_length_and_dec()
+bool Item_func_pad::fix_length_and_dec()
 {
   if (arg_count == 3)
   {
     // Handle character set for args[0] and args[2].
     if (agg_arg_charsets_for_string_result(collation, &args[0], 2, 2))
-      return;
+      return TRUE;
   }
   else
   {
     if (agg_arg_charsets_for_string_result(collation, &args[0], 1, 1))
-      return;
+      return TRUE;
     pad_str.set_charset(collation.collation);
     pad_str.length(0);
     pad_str.append(" ", 1);
@@ -3157,6 +3194,7 @@ void Item_func_pad::fix_length_and_dec()
     max_length= MAX_BLOB_WIDTH;
     maybe_null= 1;
   }
+  return FALSE;
 }
 
 
@@ -3411,10 +3449,11 @@ String *Item_func_conv_charset::val_str(String *str)
     0 : str;
 }
 
-void Item_func_conv_charset::fix_length_and_dec()
+bool Item_func_conv_charset::fix_length_and_dec()
 {
   DBUG_ASSERT(collation.derivation == DERIVATION_IMPLICIT);
   fix_char_length(args[0]->max_char_length());
+  return FALSE;
 }
 
 void Item_func_conv_charset::print(String *str, enum_query_type query_type)
@@ -3436,17 +3475,18 @@ String *Item_func_set_collation::val_str(String *str)
   return str;
 }
 
-void Item_func_set_collation::fix_length_and_dec()
+bool Item_func_set_collation::fix_length_and_dec()
 {
   if (!my_charset_same(args[0]->collation.collation, m_set_collation))
   {
     my_error(ER_COLLATION_CHARSET_MISMATCH, MYF(0),
              m_set_collation->name, args[0]->collation.collation->csname);
-    return;
+    return TRUE;
   }
   collation.set(m_set_collation, DERIVATION_EXPLICIT,
                 args[0]->collation.repertoire);
   max_length= args[0]->max_length;
+  return FALSE;
 }
 
 
@@ -3489,7 +3529,7 @@ String *Item_func_collation::val_str(String *str)
 }
 
 
-void Item_func_weight_string::fix_length_and_dec()
+bool Item_func_weight_string::fix_length_and_dec()
 {
   CHARSET_INFO *cs= args[0]->collation.collation;
   collation.set(&my_charset_bin, args[0]->collation.derivation);
@@ -3507,6 +3547,7 @@ void Item_func_weight_string::fix_length_and_dec()
     max_length= (uint32)cs->coll->strnxfrmlen(cs, char_length * cs->mbmaxlen);
   }
   maybe_null= 1;
+  return FALSE;
 }
 
 
@@ -3878,15 +3919,16 @@ String* Item_func_export_set::val_str(String* str)
   return str;
 }
 
-void Item_func_export_set::fix_length_and_dec()
+bool Item_func_export_set::fix_length_and_dec()
 {
   uint32 length= MY_MAX(args[1]->max_char_length(), args[2]->max_char_length());
   uint32 sep_length= (arg_count > 3 ? args[3]->max_char_length() : 1);
 
   if (agg_arg_charsets_for_string_result(collation,
                                          args + 1, MY_MIN(4, arg_count) - 1))
-    return;
+    return TRUE;
   fix_char_length(length * 64 + sep_length * 63);
+  return FALSE;
 }
 
 
@@ -4286,12 +4328,13 @@ bool Item_func_dyncol_create::fix_fields(THD *thd, Item **ref)
 }
 
 
-void Item_func_dyncol_create::fix_length_and_dec()
+bool Item_func_dyncol_create::fix_length_and_dec()
 {
   max_length= MAX_BLOB_WIDTH;
   maybe_null= TRUE;
   collation.set(&my_charset_bin);
   decimals= 0;
+  return FALSE;
 }
 
 bool Item_func_dyncol_create::prepare_arguments(THD *thd, bool force_names_arg)
@@ -5211,10 +5254,11 @@ Item_temptable_rowid::Item_temptable_rowid(TABLE *table_arg)
   max_length= table->file->ref_length;
 }
 
-void Item_temptable_rowid::fix_length_and_dec()
+bool Item_temptable_rowid::fix_length_and_dec()
 {
   used_tables_cache= table->map;
   const_item_cache= false;
+  return FALSE;
 }
 
 String *Item_temptable_rowid::val_str(String *str)
diff --git a/sql/item_strfunc.h b/sql/item_strfunc.h
index eb084c3f58d..29af0b43d9d 100644
--- a/sql/item_strfunc.h
+++ b/sql/item_strfunc.h
@@ -144,9 +144,10 @@ class Item_func_md5 :public Item_str_ascii_checksum_func
 public:
   Item_func_md5(THD *thd, Item *a): Item_str_ascii_checksum_func(thd, a) {}
   String *val_str_ascii(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     fix_length_and_charset(32, default_charset());
+    return FALSE;
   }
   const char *func_name() const { return "md5"; }
   Item *get_copy(THD *thd)
@@ -159,7 +160,7 @@ class Item_func_sha :public Item_str_ascii_checksum_func
 public:
   Item_func_sha(THD *thd, Item *a): Item_str_ascii_checksum_func(thd, a) {}
   String *val_str_ascii(String *);    
-  void fix_length_and_dec();      
+  bool fix_length_and_dec();
   const char *func_name() const { return "sha"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_sha>(thd, this); }
@@ -171,7 +172,7 @@ public:
   Item_func_sha2(THD *thd, Item *a, Item *b)
    :Item_str_ascii_checksum_func(thd, a, b) {}
   String *val_str_ascii(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "sha2"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_sha2>(thd, this); }
@@ -184,7 +185,7 @@ public:
   Item_func_to_base64(THD *thd, Item *a)
    :Item_str_ascii_checksum_func(thd, a) {}
   String *val_str_ascii(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "to_base64"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_to_base64>(thd, this); }
@@ -197,7 +198,7 @@ public:
   Item_func_from_base64(THD *thd, Item *a)
    :Item_str_binary_checksum_func(thd, a) { }
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "from_base64"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_from_base64>(thd, this); }
@@ -224,7 +225,7 @@ class Item_func_aes_encrypt :public Item_aes_crypt
 public:
   Item_func_aes_encrypt(THD *thd, Item *a, Item *b)
    :Item_aes_crypt(thd, a, b) {}
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "aes_encrypt"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_aes_encrypt>(thd, this); }
@@ -235,7 +236,7 @@ class Item_func_aes_decrypt :public Item_aes_crypt
 public:
   Item_func_aes_decrypt(THD *thd, Item *a, Item *b):
     Item_aes_crypt(thd, a, b) {}
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "aes_decrypt"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_aes_decrypt>(thd, this); }
@@ -259,7 +260,7 @@ public:
   Item_func_concat(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
   Item_func_concat(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "concat"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_concat>(thd, this); }
@@ -294,11 +295,12 @@ public:
   Item_func_decode_histogram(THD *thd, Item *a, Item *b):
     Item_str_func(thd, a, b) {}
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation.set(system_charset_info);
     max_length= MAX_BLOB_WIDTH;
     maybe_null= 1;
+    return FALSE;
   }
   const char *func_name() const { return "decode_histogram"; }
   Item *get_copy(THD *thd)
@@ -311,7 +313,7 @@ class Item_func_concat_ws :public Item_str_func
 public:
   Item_func_concat_ws(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "concat_ws"; }
   table_map not_null_tables() const { return 0; }
   Item *get_copy(THD *thd)
@@ -324,7 +326,7 @@ class Item_func_reverse :public Item_str_func
 public:
   Item_func_reverse(THD *thd, Item *a): Item_str_func(thd, a) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "reverse"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_reverse>(thd, this); }
@@ -338,7 +340,7 @@ public:
   Item_func_replace(THD *thd, Item *org, Item *find, Item *replace):
     Item_str_func(thd, org, find, replace) {}
   String *val_str(String *to) { return val_str_internal(to, NULL); };
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   String *val_str_internal(String *str, String *empty_string_for_null);
   const char *func_name() const { return "replace"; }
   Item *get_copy(THD *thd)
@@ -378,7 +380,7 @@ public:
   }
   String *val_str(String *str);
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "regexp_replace"; }
   Item *get_copy(THD *thd) { return 0;}
 };
@@ -400,7 +402,7 @@ public:
   }
   String *val_str(String *str);
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "regexp_substr"; }
   Item *get_copy(THD *thd) { return 0; }
 };
@@ -414,7 +416,7 @@ public:
                    Item *new_str):
     Item_str_func(thd, org, start, length, new_str) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "insert"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_insert>(thd, this); }
@@ -438,7 +440,7 @@ class Item_func_lcase :public Item_str_conv
 public:
   Item_func_lcase(THD *thd, Item *item): Item_str_conv(thd, item) {}
   const char *func_name() const { return "lcase"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_lcase>(thd, this); }
 };
@@ -448,7 +450,7 @@ class Item_func_ucase :public Item_str_conv
 public:
   Item_func_ucase(THD *thd, Item *item): Item_str_conv(thd, item) {}
   const char *func_name() const { return "ucase"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_ucase>(thd, this); }
 };
@@ -460,7 +462,7 @@ class Item_func_left :public Item_str_func
 public:
   Item_func_left(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "left"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_left>(thd, this); }
@@ -473,7 +475,7 @@ class Item_func_right :public Item_str_func
 public:
   Item_func_right(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "right"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_right>(thd, this); }
@@ -490,7 +492,7 @@ public:
   Item_func_substr(THD *thd, Item *a, Item *b, Item *c):
     Item_str_func(thd, a, b, c) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "substr"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_substr>(thd, this); }
@@ -508,10 +510,11 @@ public:
     Item_func_substr(thd, a, b) {}
   Item_func_substr_oracle(THD *thd, Item *a, Item *b, Item *c):
     Item_func_substr(thd, a, b, c) {}
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    Item_func_substr::fix_length_and_dec();
+    bool res= Item_func_substr::fix_length_and_dec();
     maybe_null= true;
+    return res;
   }
   const char *func_name() const { return "substr_oracle"; }
   Item *get_copy(THD *thd)
@@ -525,7 +528,7 @@ public:
   Item_func_substr_index(THD *thd, Item *a,Item *b,Item *c):
     Item_str_func(thd, a, b, c) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "substring_index"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_substr_index>(thd, this); }
@@ -561,7 +564,7 @@ public:
   Item_func_trim(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b) {}
   Item_func_trim(THD *thd, Item *a): Item_str_func(thd, a) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "trim"; }
   void print(String *str, enum_query_type query_type);
   virtual const char *mode_name() const { return "both"; }
@@ -581,10 +584,11 @@ public:
     Item_func_trim(thd, a, b) {}
   Item_func_trim_oracle(THD *thd, Item *a): Item_func_trim(thd, a) {}
   const char *func_name() const { return "trim_oracle"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    Item_func_trim::fix_length_and_dec();
+    bool res= Item_func_trim::fix_length_and_dec();
     maybe_null= true;
+    return res;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_trim_oracle>(thd, this); }
@@ -615,10 +619,11 @@ public:
     Item_func_ltrim(thd, a, b) {}
   Item_func_ltrim_oracle(THD *thd, Item *a): Item_func_ltrim(thd, a) {}
   const char *func_name() const { return "ltrim_oracle"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    Item_func_ltrim::fix_length_and_dec();
+    bool res= Item_func_ltrim::fix_length_and_dec();
     maybe_null= true;
+    return res;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_ltrim_oracle>(thd, this); }
@@ -649,10 +654,11 @@ public:
     Item_func_rtrim(thd, a, b) {}
   Item_func_rtrim_oracle(THD *thd, Item *a): Item_func_rtrim(thd, a) {}
   const char *func_name() const { return "rtrim_oracle"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    Item_func_rtrim::fix_length_and_dec();
+    bool res= Item_func_rtrim::fix_length_and_dec();
     maybe_null= true;
+    return res;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_rtrim_oracle>(thd, this); }
@@ -681,12 +687,13 @@ public:
     Item_str_ascii_checksum_func(thd, a), alg(al), deflt(0) {}
   String *val_str_ascii(String *str);
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     fix_length_and_charset((alg == 1 ?
                             SCRAMBLED_PASSWORD_CHAR_LENGTH :
                             SCRAMBLED_PASSWORD_CHAR_LENGTH_323),
                            default_charset());
+    return FALSE;
   }
   const char *func_name() const { return ((deflt || alg == 1) ?
                                           "password" : "old_password"); }
@@ -707,11 +714,12 @@ public:
   Item_func_des_encrypt(THD *thd, Item *a, Item *b)
    :Item_str_binary_checksum_func(thd, a, b) {}
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     maybe_null=1;
     /* 9 = MAX ((8- (arg_len % 8)) + 1) */
     max_length = args[0]->max_length + 9;
+    return FALSE;
   }
   const char *func_name() const { return "des_encrypt"; }
   Item *get_copy(THD *thd)
@@ -727,13 +735,14 @@ public:
   Item_func_des_decrypt(THD *thd, Item *a, Item *b)
    :Item_str_binary_checksum_func(thd, a, b) {}
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     maybe_null=1;
     /* 9 = MAX ((8- (arg_len % 8)) + 1) */
     max_length= args[0]->max_length;
     if (max_length >= 9U)
       max_length-= 9U;
+    return FALSE;
   }
   const char *func_name() const { return "des_decrypt"; }
   Item *get_copy(THD *thd)
@@ -766,7 +775,7 @@ public:
     constructor_helper();
   }
   String *val_str(String *);
-  void fix_length_and_dec() { maybe_null=1; max_length = 13; }
+  bool fix_length_and_dec() { maybe_null=1; max_length = 13; return FALSE; }
   const char *func_name() const { return "encrypt"; }
   bool check_vcol_func_processor(void *arg)
   {
@@ -790,7 +799,7 @@ public:
   Item_func_encode(THD *thd, Item *a, Item *seed_arg):
     Item_str_binary_checksum_func(thd, a, seed_arg) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "encode"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_encode>(thd, this); }
@@ -840,10 +849,11 @@ class Item_func_database :public Item_func_sysconst
 public:
   Item_func_database(THD *thd): Item_func_sysconst(thd) {}
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     max_length= MAX_FIELD_NAME * system_charset_info->mbmaxlen;
     maybe_null=1;
+    return FALSE;
   }
   const char *func_name() const { return "database"; }
   const char *fully_qualified_func_name() const { return "database()"; }
@@ -863,10 +873,11 @@ public:
   {
     str->append(func_name());
   }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     max_length= 512 * system_charset_info->mbmaxlen;
     null_value= maybe_null= false;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_sqlerrm>(thd, this); }
@@ -889,10 +900,11 @@ public:
     return (null_value ? 0 : &str_value);
   }
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     max_length= (uint32) (username_char_length +
                  HOSTNAME_LENGTH + 1) * SYSTEM_CHARSET_MBMAXLEN;
+    return FALSE;
   }
   const char *func_name() const { return "user"; }
   const char *fully_qualified_func_name() const { return "user()"; }
@@ -932,8 +944,11 @@ public:
   Item_func_current_role(THD *thd, Name_resolution_context *context_arg):
     Item_func_sysconst(thd), context(context_arg) {}
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec()
-  { max_length= (uint32) username_char_length * SYSTEM_CHARSET_MBMAXLEN; }
+  bool fix_length_and_dec()
+  {
+    max_length= (uint32) username_char_length * SYSTEM_CHARSET_MBMAXLEN;
+    return FALSE;
+  }
   int save_in_field(Field *field, bool no_conversions)
   { return save_str_value_in_field(field, &str_value); }
   const char *func_name() const { return "current_role"; }
@@ -961,7 +976,7 @@ class Item_func_soundex :public Item_str_func
 public:
   Item_func_soundex(THD *thd, Item *a): Item_str_func(thd, a) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "soundex"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_soundex>(thd, this); }
@@ -975,7 +990,7 @@ public:
   double val_real();
   longlong val_int();
   String *val_str(String *str);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "elt"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_elt>(thd, this); }
@@ -989,7 +1004,7 @@ class Item_func_make_set :public Item_str_func
 public:
   Item_func_make_set(THD *thd, List<Item> &list): Item_str_func(thd, list) {}
   String *val_str(String *str);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "make_set"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_make_set>(thd, this); }
@@ -1006,7 +1021,7 @@ public:
     Item_str_ascii_func(thd, org, dec, lang) {}
 
   String *val_str_ascii(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "format"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_format>(thd, this); }
@@ -1026,9 +1041,10 @@ public:
   { collation.set(cs); }
   String *val_str(String *);
   void append_char(String * str, int32 num);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     max_length= arg_count * 4;
+    return FALSE;
   }
   const char *func_name() const { return "char"; }
   void print(String *str, enum_query_type query_type);
@@ -1042,9 +1058,10 @@ public:
   Item_func_chr(THD *thd, Item *arg1, CHARSET_INFO *cs):
     Item_func_char(thd, arg1, cs) {}
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     max_length= 4;
+    return FALSE;
   }
   const char *func_name() const { return "chr"; }
   Item *get_copy(THD *thd)
@@ -1058,7 +1075,7 @@ public:
   Item_func_repeat(THD *thd, Item *arg1, Item *arg2):
     Item_str_func(thd, arg1, arg2) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "repeat"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_repeat>(thd, this); }
@@ -1070,7 +1087,7 @@ class Item_func_space :public Item_str_func
 public:
   Item_func_space(THD *thd, Item *arg1): Item_str_func(thd, arg1) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "space"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_space>(thd, this); }
@@ -1083,7 +1100,7 @@ public:
   Item_func_binlog_gtid_pos(THD *thd, Item *arg1, Item *arg2):
     Item_str_func(thd, arg1, arg2) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "binlog_gtid_pos"; }
   bool check_vcol_func_processor(void *arg)
   {
@@ -1103,7 +1120,7 @@ public:
     Item_str_func(thd, arg1, arg2, arg3) {}
   Item_func_pad(THD *thd, Item *arg1, Item *arg2):
     Item_str_func(thd, arg1, arg2) {}
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
 };
 
 
@@ -1130,10 +1147,11 @@ public:
     Item_func_rpad(thd, arg1, arg2, arg3) {}
   Item_func_rpad_oracle(THD *thd, Item *arg1, Item *arg2):
     Item_func_rpad(thd, arg1, arg2) {}
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    Item_func_rpad::fix_length_and_dec();
+    bool res= Item_func_rpad::fix_length_and_dec();
     maybe_null= true;
+    return res;
   }
   const char *func_name() const { return "rpad_oracle"; }
   Item *get_copy(THD *thd)
@@ -1164,10 +1182,11 @@ public:
     Item_func_lpad(thd, arg1, arg2, arg3) {}
   Item_func_lpad_oracle(THD *thd, Item *arg1, Item *arg2):
     Item_func_lpad(thd, arg1, arg2) {}
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    Item_func_lpad::fix_length_and_dec();
+    bool res= Item_func_lpad::fix_length_and_dec();
     maybe_null= true;
+    return res;
   }
   const char *func_name() const { return "lpad_oracle"; }
   Item *get_copy(THD *thd)
@@ -1182,11 +1201,12 @@ public:
     Item_str_func(thd, a, b, c) {}
   const char *func_name() const { return "conv"; }
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation.set(default_charset());
     max_length=64;
     maybe_null= 1;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_conv>(thd, this); }
@@ -1216,12 +1236,13 @@ public:
     DBUG_ASSERT(fixed);
     return m_arg0_type_handler->Item_func_hex_val_str_ascii(this, str);
   }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation.set(default_charset(), DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
     decimals=0;
     fix_char_length(args[0]->max_length * 2);
     m_arg0_type_handler= args[0]->type_handler();
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_hex>(thd, this); }
@@ -1238,11 +1259,12 @@ public:
   }
   const char *func_name() const { return "unhex"; }
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation.set(&my_charset_bin);
     decimals=0;
     max_length=(1+args[0]->max_length)/2;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_unhex>(thd, this); }
@@ -1261,11 +1283,12 @@ public:
     Item_str_func(thd, a, b), is_min(is_min_arg)
   { maybe_null= 1; }
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation.set(args[0]->collation);
     decimals=0;
     max_length= MAX_BLOB_WIDTH;
+    return FALSE;
   }
 };
 
@@ -1306,10 +1329,11 @@ public:
       tmp->set_charset(&my_charset_bin);
     return tmp;
   }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation.set(&my_charset_bin);
     max_length=args[0]->max_length;
+    return FALSE;
   }
   void print(String *str, enum_query_type query_type);
   const char *func_name() const { return "cast_as_binary"; }
@@ -1326,11 +1350,12 @@ public:
   Item_load_file(THD *thd, Item *a): Item_str_func(thd, a) {}
   String *val_str(String *);
   const char *func_name() const { return "load_file"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation.set(&my_charset_bin, DERIVATION_COERCIBLE);
     maybe_null=1;
     max_length=MAX_BLOB_WIDTH;
+    return FALSE;
   }
   bool check_vcol_func_processor(void *arg)
   {
@@ -1351,7 +1376,7 @@ class Item_func_export_set: public Item_str_func
   Item_func_export_set(THD *thd, Item *a, Item *b, Item* c, Item* d, Item* e):
     Item_str_func(thd, a, b, c, d, e) {}
   String  *val_str(String *str);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "export_set"; }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_export_set>(thd, this); }
@@ -1365,12 +1390,13 @@ public:
   Item_func_quote(THD *thd, Item *a): Item_str_func(thd, a) {}
   const char *func_name() const { return "quote"; }
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation.set(args[0]->collation);
     ulonglong max_result_length= (ulonglong) args[0]->max_length * 2 +
                                   2 * collation.collation->mbmaxlen;
     max_length= (uint32) MY_MIN(max_result_length, MAX_BLOB_WIDTH);
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_quote>(thd, this); }
@@ -1453,7 +1479,7 @@ public:
       return 1;
     return res;
   }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const { return "convert"; }
   void print(String *str, enum_query_type query_type);
   Item *get_copy(THD *thd)
@@ -1467,7 +1493,7 @@ public:
   Item_func_set_collation(THD *thd, Item *a, CHARSET_INFO *set_collation):
     Item_str_func(thd, a), m_set_collation(set_collation) {}
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool eq(const Item *item, bool binary_cmp) const;
   const char *func_name() const { return "collate"; }
   enum precedence precedence() const { return COLLATE_PRECEDENCE; }
@@ -1488,11 +1514,12 @@ class Item_func_expr_str_metadata :public Item_str_func
 {
 public:
   Item_func_expr_str_metadata(THD *thd, Item *a): Item_str_func(thd, a) { }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
      collation.set(system_charset_info);
      max_length= 64 * collation.collation->mbmaxlen; // should be enough
      maybe_null= 0;
+     return FALSE;
   };
   table_map not_null_tables() const { return 0; }
   Item* propagate_equal_fields(THD *thd, const Context &ctx, COND_EQUAL *cond)
@@ -1542,7 +1569,7 @@ public:
   }
   const char *func_name() const { return "weight_string"; }
   String *val_str(String *);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool eq(const Item *item, bool binary_cmp) const
   {
     if (!Item_str_func::eq(item, binary_cmp))
@@ -1568,7 +1595,7 @@ public:
   Item_func_crc32(THD *thd, Item *a): Item_long_func(thd, a)
   { unsigned_flag= 1; }
   const char *func_name() const { return "crc32"; }
-  void fix_length_and_dec() { max_length=10; }
+  bool fix_length_and_dec() { max_length=10; return FALSE; }
   longlong val_int();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_crc32>(thd, this); }
@@ -1581,7 +1608,7 @@ public:
   Item_func_uncompressed_length(THD *thd, Item *a)
    :Item_long_func_length(thd, a) {}
   const char *func_name() const{return "uncompressed_length";}
-  void fix_length_and_dec() { max_length=10; maybe_null= true; }
+  bool fix_length_and_dec() { max_length=10; maybe_null= true; return FALSE; }
   longlong val_int();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_uncompressed_length>(thd, this); }
@@ -1599,7 +1626,11 @@ class Item_func_compress: public Item_str_binary_checksum_func
 public:
   Item_func_compress(THD *thd, Item *a)
    :Item_str_binary_checksum_func(thd, a) {}
-  void fix_length_and_dec(){max_length= (args[0]->max_length*120)/100+12;}
+  bool fix_length_and_dec()
+  {
+    max_length= (args[0]->max_length * 120) / 100 + 12;
+    return FALSE;
+  }
   const char *func_name() const{return "compress";}
   String *val_str(String *) ZLIB_DEPENDED_FUNCTION
   Item *get_copy(THD *thd)
@@ -1612,7 +1643,11 @@ class Item_func_uncompress: public Item_str_binary_checksum_func
 public:
   Item_func_uncompress(THD *thd, Item *a)
    :Item_str_binary_checksum_func(thd, a) {}
-  void fix_length_and_dec(){ maybe_null= 1; max_length= MAX_BLOB_WIDTH; }
+  bool fix_length_and_dec()
+  {
+    maybe_null= 1; max_length= MAX_BLOB_WIDTH;
+    return FALSE;
+  }
   const char *func_name() const{return "uncompress";}
   String *val_str(String *) ZLIB_DEPENDED_FUNCTION
   Item *get_copy(THD *thd)
@@ -1624,11 +1659,12 @@ class Item_func_uuid: public Item_str_func
 {
 public:
   Item_func_uuid(THD *thd): Item_str_func(thd) {}
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     collation.set(system_charset_info,
                   DERIVATION_COERCIBLE, MY_REPERTOIRE_ASCII);
     fix_char_length(MY_UUID_STRING_LENGTH);
+    return FALSE;
   }
   bool const_item() const { return false; }
   table_map used_tables() const { return RAND_TABLE_BIT; }
@@ -1656,7 +1692,7 @@ protected:
 public:
   Item_func_dyncol_create(THD *thd, List<Item> &args, DYNCALL_CREATE_DEF *dfs);
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   const char *func_name() const{ return "column_create"; }
   String *val_str(String *);
   void print(String *str, enum_query_type query_type);
@@ -1686,11 +1722,12 @@ public:
     {collation.set(DYNCOL_UTF);}
   const char *func_name() const{ return "column_json"; }
   String *val_str(String *);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     max_length= MAX_BLOB_WIDTH;
     maybe_null= 1;
     decimals= 0;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_dyncol_json>(thd, this); }
@@ -1705,8 +1742,8 @@ class Item_dyncol_get: public Item_str_func
 public:
   Item_dyncol_get(THD *thd, Item *str, Item *num): Item_str_func(thd, str, num)
   {}
-  void fix_length_and_dec()
-  { maybe_null= 1;; max_length= MAX_BLOB_WIDTH; }
+  bool fix_length_and_dec()
+  { maybe_null= 1;; max_length= MAX_BLOB_WIDTH; return FALSE; }
   /* Mark that collation can change between calls */
   bool dynamic_result() { return 1; }
 
@@ -1744,7 +1781,8 @@ class Item_func_dyncol_list: public Item_str_func
 public:
   Item_func_dyncol_list(THD *thd, Item *str): Item_str_func(thd, str)
     {collation.set(DYNCOL_UTF);}
-  void fix_length_and_dec() { maybe_null= 1; max_length= MAX_BLOB_WIDTH; };
+  bool fix_length_and_dec()
+  { maybe_null= 1; max_length= MAX_BLOB_WIDTH; return FALSE; };
   const char *func_name() const{ return "column_list"; }
   String *val_str(String *);
   Item *get_copy(THD *thd)
@@ -1767,7 +1805,7 @@ public:
   String *val_str(String *str);
   enum Functype functype() const { return  TEMPTABLE_ROWID; }
   const char *func_name() const { return "<rowid>"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_temptable_rowid>(thd, this); }
 };
diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc
index 4280a67e356..1947a45186a 100644
--- a/sql/item_subselect.cc
+++ b/sql/item_subselect.cc
@@ -310,10 +310,14 @@ bool Item_subselect::fix_fields(THD *thd_param, Item **ref)
     if (engine->cols() > max_columns)
     {
       my_error(ER_OPERAND_COLUMNS, MYF(0), 1);
-
+      res= TRUE;
+      goto end;
+    }
+    if (fix_length_and_dec())
+    {
+      res= TRUE;
       goto end;
     }
-    fix_length_and_dec();
   }
   else
     goto end;
@@ -910,9 +914,11 @@ Item::Type Item_subselect::type() const
 }
 
 
-void Item_subselect::fix_length_and_dec()
+bool Item_subselect::fix_length_and_dec()
 {
-  engine->fix_length_and_dec(0);
+  if (engine->fix_length_and_dec(0))
+    return TRUE;
+  return FALSE;
 }
 
 
@@ -1186,18 +1192,19 @@ const Type_handler *Item_singlerow_subselect::type_handler() const
   return engine->type_handler();
 }
 
-void Item_singlerow_subselect::fix_length_and_dec()
+bool Item_singlerow_subselect::fix_length_and_dec()
 {
   if ((max_columns= engine->cols()) == 1)
   {
-    engine->fix_length_and_dec(row= &value);
+    if (engine->fix_length_and_dec(row= &value))
+      return TRUE;
   }
   else
   {
     if (!(row= (Item_cache**) current_thd->alloc(sizeof(Item_cache*) *
-                                                 max_columns)))
-      return;
-    engine->fix_length_and_dec(row);
+                                                 max_columns)) ||
+        engine->fix_length_and_dec(row))
+      return TRUE;
     value= *row;
   }
   unsigned_flag= value->unsigned_flag;
@@ -1213,6 +1220,7 @@ void Item_singlerow_subselect::fix_length_and_dec()
     for (uint i= 0; i < max_columns; i++)
       row[i]->maybe_null= TRUE;
   }
+  return FALSE;
 }
 
 
@@ -1497,7 +1505,7 @@ void Item_exists_subselect::init_length_and_dec()
 }
 
 
-void Item_exists_subselect::fix_length_and_dec()
+bool Item_exists_subselect::fix_length_and_dec()
 {
   DBUG_ENTER("Item_exists_subselect::fix_length_and_dec");
   init_length_and_dec();
@@ -1505,14 +1513,17 @@ void Item_exists_subselect::fix_length_and_dec()
     We need only 1 row to determine existence (i.e. any EXISTS that is not
     an IN always requires LIMIT 1)
   */
+  Item *item= new (thd->mem_root) Item_int(thd, (int32) 1);
+  if (!item)
+    DBUG_RETURN(TRUE);
   thd->change_item_tree(&unit->global_parameters()->select_limit,
-                        new (thd->mem_root) Item_int(thd, (int32) 1));
+                        item);
   DBUG_PRINT("info", ("Set limit to 1"));
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 
-void Item_in_subselect::fix_length_and_dec()
+bool Item_in_subselect::fix_length_and_dec()
 {
   DBUG_ENTER("Item_in_subselect::fix_length_and_dec");
   init_length_and_dec();
@@ -1520,7 +1531,7 @@ void Item_in_subselect::fix_length_and_dec()
     Unlike Item_exists_subselect, LIMIT 1 is set later for
     Item_in_subselect, depending on the chosen strategy.
   */
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -3705,11 +3716,11 @@ bool subselect_single_select_engine::no_rows()
 }
 
 
-/* 
- makes storage for the output values for the subquery and calcuates 
+/**
+ Makes storage for the output values for the subquery and calcuates
  their data and column types and their nullability.
-*/ 
-void subselect_engine::set_row(List<Item> &item_list, Item_cache **row)
+*/
+bool subselect_engine::set_row(List<Item> &item_list, Item_cache **row)
 {
   Item *sel_item;
   List_iterator_fast<Item> li(item_list);
@@ -3722,44 +3733,51 @@ void subselect_engine::set_row(List<Item> &item_list, Item_cache **row)
     item->unsigned_flag= sel_item->unsigned_flag;
     maybe_null= sel_item->maybe_null;
     if (!(row[i]= sel_item->get_cache(thd)))
-      return;
+      return TRUE;
     row[i]->setup(thd, sel_item);
  //psergey-backport-timours:   row[i]->store(sel_item);
   }
   if (item_list.elements > 1)
     set_handler(&type_handler_row);
+  return FALSE;
 }
 
-void subselect_single_select_engine::fix_length_and_dec(Item_cache **row)
+bool subselect_single_select_engine::fix_length_and_dec(Item_cache **row)
 {
   DBUG_ASSERT(row || select_lex->item_list.elements==1);
-  set_row(select_lex->item_list, row);
+  if (set_row(select_lex->item_list, row))
+    return TRUE;
   item->collation.set(row[0]->collation);
   if (cols() != 1)
     maybe_null= 0;
+  return FALSE;
 }
 
-void subselect_union_engine::fix_length_and_dec(Item_cache **row)
+bool subselect_union_engine::fix_length_and_dec(Item_cache **row)
 {
   DBUG_ASSERT(row || unit->first_select()->item_list.elements==1);
 
   if (unit->first_select()->item_list.elements == 1)
   {
-    set_row(unit->types, row);
+    if (set_row(unit->types, row))
+      return TRUE;
     item->collation.set(row[0]->collation);
   }
   else
   {
     bool maybe_null_saved= maybe_null;
-    set_row(unit->types, row);
+    if (set_row(unit->types, row))
+      return TRUE;
     maybe_null= maybe_null_saved;
   }
+  return FALSE;
 }
 
-void subselect_uniquesubquery_engine::fix_length_and_dec(Item_cache **row)
+bool subselect_uniquesubquery_engine::fix_length_and_dec(Item_cache **row)
 {
   //this never should be called
   DBUG_ASSERT(0);
+  return FALSE;
 }
 
 int  read_first_record_seq(JOIN_TAB *tab);
@@ -5586,9 +5604,10 @@ void subselect_hash_sj_engine::print(String *str, enum_query_type query_type)
          ));
 }
 
-void subselect_hash_sj_engine::fix_length_and_dec(Item_cache** row)
+bool subselect_hash_sj_engine::fix_length_and_dec(Item_cache** row)
 {
   DBUG_ASSERT(FALSE);
+  return FALSE;
 }
 
 void subselect_hash_sj_engine::exclude()
diff --git a/sql/item_subselect.h b/sql/item_subselect.h
index dfe3287615b..363dbba4ddd 100644
--- a/sql/item_subselect.h
+++ b/sql/item_subselect.h
@@ -197,7 +197,7 @@ public:
     const_item_cache= 0;
     forced_const= TRUE; 
   }
-  virtual void fix_length_and_dec();
+  virtual bool fix_length_and_dec();
   table_map used_tables() const;
   table_map not_null_tables() const { return 0; }
   bool const_item() const;
@@ -306,7 +306,7 @@ public:
   bool val_bool();
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate);
   const Type_handler *type_handler() const;
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
 
   uint cols() const;
   Item* element_index(uint i) { return reinterpret_cast<Item*>(row[i]); }
@@ -404,7 +404,7 @@ public:
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzydate)
   { return get_date_from_int(ltime, fuzzydate); }
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   void print(String *str, enum_query_type query_type);
   bool select_transformer(JOIN *join);
   void top_level_item() { abort_on_null=1; }
@@ -627,7 +627,7 @@ public:
   void print(String *str, enum_query_type query_type);
   enum precedence precedence() const { return CMP_PRECEDENCE; }
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   void fix_after_pullout(st_select_lex *new_parent, Item **ref, bool merge);
   bool const_item() const
   {
@@ -808,7 +808,7 @@ public:
   void set_thd(THD *thd_arg);
   THD * get_thd() { return thd ? thd : current_thd; }
   virtual int prepare(THD *)= 0;
-  virtual void fix_length_and_dec(Item_cache** row)= 0;
+  virtual bool fix_length_and_dec(Item_cache** row)= 0;
   /*
     Execute the engine
 
@@ -849,7 +849,7 @@ public:
   virtual int get_identifier() { DBUG_ASSERT(0); return 0; }
   virtual void force_reexecution() {}
 protected:
-  void set_row(List<Item> &item_list, Item_cache **row);
+  bool set_row(List<Item> &item_list, Item_cache **row);
 };
 
 
@@ -865,7 +865,7 @@ public:
 				 Item_subselect *item);
   void cleanup();
   int prepare(THD *thd);
-  void fix_length_and_dec(Item_cache** row);
+  bool fix_length_and_dec(Item_cache** row);
   int exec();
   uint cols() const;
   uint8 uncacheable();
@@ -901,7 +901,7 @@ public:
 			 Item_subselect *item);
   void cleanup();
   int prepare(THD *);
-  void fix_length_and_dec(Item_cache** row);
+  bool fix_length_and_dec(Item_cache** row);
   int exec();
   uint cols() const;
   uint8 uncacheable();
@@ -959,7 +959,7 @@ public:
   ~subselect_uniquesubquery_engine();
   void cleanup();
   int prepare(THD *);
-  void fix_length_and_dec(Item_cache** row);
+  bool fix_length_and_dec(Item_cache** row);
   int exec();
   uint cols() const { return 1; }
   uint8 uncacheable() { return UNCACHEABLE_DEPENDENT_INJECTED; }
@@ -1108,7 +1108,7 @@ public:
     TODO: factor out all these methods in a base subselect_index_engine class
     because all of them have dummy implementations and should never be called.
   */
-  void fix_length_and_dec(Item_cache** row);//=>base class
+  bool fix_length_and_dec(Item_cache** row);//=>base class
   void exclude(); //=>base class
   //=>base class
   bool change_result(Item_subselect *si,
@@ -1381,7 +1381,7 @@ public:
                                  uint count_columns_with_nulls_arg);
   int prepare(THD *thd_arg) { set_thd(thd_arg); return 0; }
   int exec();
-  void fix_length_and_dec(Item_cache**) {}
+  bool fix_length_and_dec(Item_cache**) { return FALSE; }
   uint cols() const { /* TODO: what is the correct value? */ return 1; }
   uint8 uncacheable() { return UNCACHEABLE_DEPENDENT; }
   void exclude() {}
diff --git a/sql/item_sum.cc b/sql/item_sum.cc
index 0e506cc26f2..3163fb9ea2e 100644
--- a/sql/item_sum.cc
+++ b/sql/item_sum.cc
@@ -1139,9 +1139,8 @@ Item_sum_num::fix_fields(THD *thd, Item **ref)
   result_field=0;
   max_length=float_length(decimals);
   null_value=1;
-  fix_length_and_dec();
-
-  if (check_sum_func(thd, ref))
+  if (fix_length_and_dec() ||
+      check_sum_func(thd, ref))
     return TRUE;
 
   memcpy (orig_args, args, sizeof (Item *) * arg_count);
@@ -1167,7 +1166,9 @@ Item_sum_hybrid::fix_fields(THD *thd, Item **ref)
   with_param= args[0]->with_param;
   with_window_func|= args[0]->with_window_func;
 
-  fix_length_and_dec();
+  if (fix_length_and_dec())
+    DBUG_RETURN(TRUE);
+
   if (!is_window_func_sum_expr())
     setup_hybrid(thd, args[0], NULL);
   result_field=0;
@@ -1181,11 +1182,11 @@ Item_sum_hybrid::fix_fields(THD *thd, Item **ref)
 }
 
 
-void Item_sum_hybrid::fix_length_and_dec()
+bool Item_sum_hybrid::fix_length_and_dec()
 {
   DBUG_ASSERT(args[0]->field_type() == args[0]->real_item()->field_type());
   DBUG_ASSERT(args[0]->result_type() == args[0]->real_item()->result_type());
-  (void) args[0]->type_handler()->Item_sum_hybrid_fix_length_and_dec(this);
+  return args[0]->type_handler()->Item_sum_hybrid_fix_length_and_dec(this);
 }
 
 
@@ -1304,7 +1305,8 @@ Item_sum_sp::fix_fields(THD *thd, Item **ref)
   result_field= NULL;
   max_length= float_length(decimals);
   null_value= 1;
-  fix_length_and_dec();
+  if (fix_length_and_dec())
+    return TRUE;
 
   if (check_sum_func(thd, ref))
     return TRUE;
@@ -1386,14 +1388,14 @@ Item_sum_sp::cleanup()
   @note called from Item::fix_fields.
 */
 
-void
+bool
 Item_sum_sp::fix_length_and_dec()
 {
   DBUG_ENTER("Item_sum_sp::fix_length_and_dec");
   DBUG_ASSERT(sp_result_field);
   Type_std_attributes::set(sp_result_field->type_std_attributes());
-  Item_sum::fix_length_and_dec();
-  DBUG_VOID_RETURN;
+  bool res= Item_sum::fix_length_and_dec();
+  DBUG_RETURN(res);
 }
 
 const char *
@@ -1489,14 +1491,16 @@ void Item_sum_sum::fix_length_and_dec_decimal()
 }
 
 
-void Item_sum_sum::fix_length_and_dec()
+bool Item_sum_sum::fix_length_and_dec()
 {
   DBUG_ENTER("Item_sum_sum::fix_length_and_dec");
   maybe_null=null_value=1;
-  args[0]->cast_to_int_type_handler()->Item_sum_sum_fix_length_and_dec(this);
+  if (args[0]->cast_to_int_type_handler()->
+      Item_sum_sum_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
   DBUG_PRINT("info", ("Type: %s (%d, %d)", type_handler()->name().ptr(),
                       max_length, (int) decimals));
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -1913,15 +1917,17 @@ void Item_sum_avg::fix_length_and_dec_double()
 }
 
 
-void Item_sum_avg::fix_length_and_dec()
+bool Item_sum_avg::fix_length_and_dec()
 {
   DBUG_ENTER("Item_sum_avg::fix_length_and_dec");
   prec_increment= current_thd->variables.div_precincrement;
   maybe_null=null_value=1;
-  args[0]->cast_to_int_type_handler()->Item_sum_avg_fix_length_and_dec(this);
+  if (args[0]->cast_to_int_type_handler()->
+      Item_sum_avg_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
   DBUG_PRINT("info", ("Type: %s (%d, %d)", type_handler()->name().ptr(),
                       max_length, (int) decimals));
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -2133,7 +2139,7 @@ void Item_sum_variance::fix_length_and_dec_decimal()
 }
 
 
-void Item_sum_variance::fix_length_and_dec()
+bool Item_sum_variance::fix_length_and_dec()
 {
   DBUG_ENTER("Item_sum_variance::fix_length_and_dec");
   maybe_null= null_value= 1;
@@ -2145,11 +2151,11 @@ void Item_sum_variance::fix_length_and_dec()
     type of the result is an implementation-defined aproximate numeric
     type.
   */
-
-  args[0]->type_handler()->Item_sum_variance_fix_length_and_dec(this);
+  if (args[0]->type_handler()->Item_sum_variance_fix_length_and_dec(this))
+    DBUG_RETURN(TRUE);
   DBUG_PRINT("info", ("Type: %s (%d, %d)", type_handler()->name().ptr(),
                       max_length, (int)decimals));
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 
@@ -3375,13 +3381,13 @@ my_decimal *Item_sum_udf_int::val_decimal(my_decimal *dec)
 
 /** Default max_length is max argument length. */
 
-void Item_sum_udf_str::fix_length_and_dec()
+bool Item_sum_udf_str::fix_length_and_dec()
 {
   DBUG_ENTER("Item_sum_udf_str::fix_length_and_dec");
   max_length=0;
   for (uint i = 0; i < arg_count; i++)
     set_if_bigger(max_length,args[i]->max_length);
-  DBUG_VOID_RETURN;
+  DBUG_RETURN(FALSE);
 }
 
 
diff --git a/sql/item_sum.h b/sql/item_sum.h
index b66f6ab6143..b400ebd5f80 100644
--- a/sql/item_sum.h
+++ b/sql/item_sum.h
@@ -457,7 +457,8 @@ public:
     Updated value is then saved in the field.
   */
   virtual void update_field()=0;
-  virtual void fix_length_and_dec() { maybe_null=1; null_value=1; }
+  virtual bool fix_length_and_dec()
+  { maybe_null=1; null_value=1; return FALSE; }
   virtual Item *result_item(THD *thd, Field *field);
 
   void update_used_tables ();
@@ -753,8 +754,8 @@ public:
   String *val_str(String*str);
   my_decimal *val_decimal(my_decimal *);
   const Type_handler *type_handler() const { return &type_handler_longlong; }
-  void fix_length_and_dec()
-  { decimals=0; max_length=21; maybe_null=null_value=0; }
+  bool fix_length_and_dec()
+  { decimals=0; max_length=21; maybe_null=null_value=0; return FALSE; }
 };
 
 
@@ -770,7 +771,7 @@ protected:
   my_decimal direct_sum_decimal;
   my_decimal dec_buffs[2];
   uint curr_dec_buff;
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
 
 public:
   Item_sum_sum(THD *thd, Item *item_par, bool distinct):
@@ -905,7 +906,7 @@ public:
 
   void fix_length_and_dec_double();
   void fix_length_and_dec_decimal();
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   enum Sumfunctype sum_func () const 
   {
     return has_with_distinct() ? AVG_DISTINCT_FUNC : AVG_FUNC;
@@ -965,7 +966,7 @@ But, this falls prey to catastrophic cancellation.  Instead, use the recurrence
 
 class Item_sum_variance : public Item_sum_num
 {
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
 
 public:
   double recurrence_m, recurrence_s;    /* Used in recurrence relation. */
@@ -1052,7 +1053,7 @@ protected:
     cmp_sign(item->cmp_sign), was_values(item->was_values)
   { }
   bool fix_fields(THD *, Item **);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   void setup_hybrid(THD *thd, Item *item, Item *value_arg);
   void clear();
   void direct_add(Item *item);
@@ -1132,8 +1133,11 @@ public:
   longlong val_int();
   void reset_field();
   void update_field();
-  void fix_length_and_dec()
-  { decimals= 0; max_length=21; unsigned_flag= 1; maybe_null= null_value= 0; }
+  bool fix_length_and_dec()
+  {
+    decimals= 0; max_length=21; unsigned_flag= 1; maybe_null= null_value= 0;
+    return FALSE;
+  }
   void cleanup()
   {
     bits= reset_bits;
@@ -1302,7 +1306,7 @@ public:
   {
     return create_table_field_from_handler(table);
   }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool fix_fields(THD *thd, Item **ref);
   const char *func_name() const;
   const Type_handler *type_handler() const;
@@ -1562,7 +1566,7 @@ class Item_sum_udf_float :public Item_udf_sum
   String *val_str(String*str);
   my_decimal *val_decimal(my_decimal *);
   const Type_handler *type_handler() const { return &type_handler_double; }
-  void fix_length_and_dec() { fix_num_length_and_dec(); }
+  bool fix_length_and_dec() { fix_num_length_and_dec(); return FALSE; }
   Item *copy_or_same(THD* thd);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_sum_udf_float>(thd, this); }
@@ -1584,7 +1588,7 @@ public:
   String *val_str(String*str);
   my_decimal *val_decimal(my_decimal *);
   const Type_handler *type_handler() const { return &type_handler_longlong; }
-  void fix_length_and_dec() { decimals=0; max_length=21; }
+  bool fix_length_and_dec() { decimals=0; max_length=21; return FALSE; }
   Item *copy_or_same(THD* thd);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_sum_udf_int>(thd, this); }
@@ -1625,7 +1629,7 @@ public:
   }
   my_decimal *val_decimal(my_decimal *dec);
   const Type_handler *type_handler() const { return string_type_handler(); }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *copy_or_same(THD* thd);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_sum_udf_str>(thd, this); }
@@ -1646,7 +1650,7 @@ public:
   longlong val_int();
   my_decimal *val_decimal(my_decimal *);
   const Type_handler *type_handler() const { return &type_handler_newdecimal; }
-  void fix_length_and_dec() { fix_num_length_and_dec(); }
+  bool fix_length_and_dec() { fix_num_length_and_dec(); return FALSE; }
   Item *copy_or_same(THD* thd);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_sum_udf_decimal>(thd, this); }
@@ -1720,7 +1724,7 @@ public:
     { DBUG_ASSERT(fixed == 1); null_value=1; return 0; }
   double val_real() { DBUG_ASSERT(fixed == 1); null_value=1; return 0.0; }
   longlong val_int() { DBUG_ASSERT(fixed == 1); null_value=1; return 0; }
-  void fix_length_and_dec() { maybe_null=1; max_length=0; }
+  bool fix_length_and_dec() { maybe_null=1; max_length=0; return FALSE; }
   enum Sumfunctype sum_func () const { return UDF_SUM_FUNC; }
   void clear() {}
   bool add() { return 0; }  
diff --git a/sql/item_timefunc.cc b/sql/item_timefunc.cc
index e01114fb0ad..b4d929e0f70 100644
--- a/sql/item_timefunc.cc
+++ b/sql/item_timefunc.cc
@@ -954,7 +954,7 @@ longlong Item_func_month::val_int()
 }
 
 
-void Item_func_monthname::fix_length_and_dec()
+bool Item_func_monthname::fix_length_and_dec()
 {
   THD* thd= current_thd;
   CHARSET_INFO *cs= thd->variables.collation_connection;
@@ -962,7 +962,8 @@ void Item_func_monthname::fix_length_and_dec()
   collation.set(cs, DERIVATION_COERCIBLE, locale->repertoire());
   decimals=0;
   max_length= locale->max_month_name_length * collation.collation->mbmaxlen;
-  maybe_null=1; 
+  maybe_null=1;
+  return FALSE;
 }
 
 
@@ -1102,7 +1103,7 @@ longlong Item_func_weekday::val_int()
                                  odbc_type) + MY_TEST(odbc_type);
 }
 
-void Item_func_dayname::fix_length_and_dec()
+bool Item_func_dayname::fix_length_and_dec()
 {
   THD* thd= current_thd;
   CHARSET_INFO *cs= thd->variables.collation_connection;
@@ -1110,7 +1111,8 @@ void Item_func_dayname::fix_length_and_dec()
   collation.set(cs, DERIVATION_COERCIBLE, locale->repertoire());
   decimals=0;
   max_length= locale->max_day_name_length * collation.collation->mbmaxlen;
-  maybe_null=1; 
+  maybe_null=1;
+  return FALSE;
 }
 
 
@@ -1842,7 +1844,7 @@ overflow:
   return 0;
 }
 
-void Item_func_date_format::fix_length_and_dec()
+bool Item_func_date_format::fix_length_and_dec()
 {
   THD* thd= current_thd;
   if (!is_time_format)
@@ -1881,6 +1883,7 @@ void Item_func_date_format::fix_length_and_dec()
     set_if_smaller(max_length,MAX_BLOB_WIDTH);
   }
   maybe_null=1;					// If wrong date
+  return FALSE;
 }
 
 
@@ -2034,13 +2037,14 @@ null_date:
 }
 
 
-void Item_func_from_unixtime::fix_length_and_dec()
-{ 
+bool Item_func_from_unixtime::fix_length_and_dec()
+{
   THD *thd= current_thd;
   thd->time_zone_used= 1;
   tz= thd->variables.time_zone;
   fix_attributes_datetime_not_fixed_dec(args[0]->decimals);
   maybe_null= true;
+  return FALSE;
 }
 
 
@@ -2112,7 +2116,7 @@ void Item_func_convert_tz::cleanup()
 }
 
 
-void Item_date_add_interval::fix_length_and_dec()
+bool Item_date_add_interval::fix_length_and_dec()
 {
   enum_field_types arg0_field_type;
 
@@ -2121,7 +2125,7 @@ void Item_date_add_interval::fix_length_and_dec()
     my_error(ER_ILLEGAL_PARAMETER_DATA_TYPES2_FOR_OPERATION, MYF(0),
              args[0]->type_handler()->name().ptr(),
              "interval", func_name());
-    return;
+    return TRUE;
   }
   /*
     The field type for the result of an Item_datefunc is defined as
@@ -2189,6 +2193,7 @@ void Item_date_add_interval::fix_length_and_dec()
     fix_char_length_temporal_not_fixed_dec(MAX_DATETIME_WIDTH, dec);
   }
   maybe_null= true;
+  return FALSE;
 }
 
 
@@ -2259,7 +2264,7 @@ void Item_extract::print(String *str, enum_query_type query_type)
   str->append(')');
 }
 
-void Item_extract::fix_length_and_dec()
+bool Item_extract::fix_length_and_dec()
 {
   maybe_null=1;					// If wrong date
   switch (int_type) {
@@ -2285,6 +2290,7 @@ void Item_extract::fix_length_and_dec()
   case INTERVAL_SECOND_MICROSECOND: set_time_length(8); break; // ssffffff
   case INTERVAL_LAST: DBUG_ASSERT(0); break; /* purecov: deadcode */
   }
+  return FALSE;
 }
 
 
@@ -2688,7 +2694,7 @@ err:
 }
 
 
-void Item_func_add_time::fix_length_and_dec()
+bool Item_func_add_time::fix_length_and_dec()
 {
   enum_field_types arg0_field_type;
 
@@ -2698,7 +2704,7 @@ void Item_func_add_time::fix_length_and_dec()
     my_error(ER_ILLEGAL_PARAMETER_DATA_TYPES2_FOR_OPERATION, MYF(0),
              args[0]->type_handler()->name().ptr(),
              args[1]->type_handler()->name().ptr(), func_name());
-    return;
+    return TRUE;
   }
   /*
     The field type for the result of an Item_func_add_time function is defined
@@ -2734,6 +2740,7 @@ void Item_func_add_time::fix_length_and_dec()
     fix_char_length_temporal_not_fixed_dec(MAX_DATETIME_WIDTH, dec);
   }
   maybe_null= true;
+  return FALSE;
 }
 
 /**
@@ -3220,7 +3227,7 @@ get_date_time_result_type(const char *format, uint length)
 }
 
 
-void Item_func_str_to_date::fix_length_and_dec()
+bool Item_func_str_to_date::fix_length_and_dec()
 {
   if (!args[0]->type_handler()->is_traditional_type() ||
       !args[1]->type_handler()->is_traditional_type())
@@ -3228,10 +3235,10 @@ void Item_func_str_to_date::fix_length_and_dec()
     my_error(ER_ILLEGAL_PARAMETER_DATA_TYPES2_FOR_OPERATION, MYF(0),
              args[0]->type_handler()->name().ptr(),
              args[1]->type_handler()->name().ptr(), func_name());
-    return;
+    return TRUE;
   }
   if (agg_arg_charsets(collation, args, 2, MY_COLL_ALLOW_CONV, 1))
-    return;
+    return TRUE;
   if (collation.collation->mbminlen > 1)
     internal_charset= &my_charset_utf8mb4_general_ci;
 
@@ -3275,6 +3282,7 @@ void Item_func_str_to_date::fix_length_and_dec()
     }
   }
   cached_timestamp_type= mysql_timestamp_type();
+  return FALSE;
 }
 
 
diff --git a/sql/item_timefunc.h b/sql/item_timefunc.h
index 30d5018ff36..51ce3bf2988 100644
--- a/sql/item_timefunc.h
+++ b/sql/item_timefunc.h
@@ -62,9 +62,10 @@ public:
   Item_func_period_add(THD *thd, Item *a, Item *b): Item_long_func(thd, a, b) {}
   longlong val_int();
   const char *func_name() const { return "period_add"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     max_length=6*MY_CHARSET_BIN_MB_MAXLEN;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_period_add>(thd, this); }
@@ -79,10 +80,11 @@ public:
   Item_func_period_diff(THD *thd, Item *a, Item *b): Item_long_func(thd, a, b) {}
   longlong val_int();
   const char *func_name() const { return "period_diff"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals=0;
     max_length=6*MY_CHARSET_BIN_MB_MAXLEN;
+    return FALSE;
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_period_diff>(thd, this); }
@@ -95,11 +97,12 @@ public:
   Item_func_to_days(THD *thd, Item *a): Item_long_func_date_field(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "to_days"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals=0; 
     max_length=6*MY_CHARSET_BIN_MB_MAXLEN;
-    maybe_null=1; 
+    maybe_null=1;
+    return FALSE;
   }
   enum_monotonicity_info get_monotonicity_info() const;
   longlong val_int_endpoint(bool left_endp, bool *incl_endp);
@@ -122,11 +125,12 @@ public:
   Item_func_to_seconds(THD *thd, Item *a): Item_longlong_func(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "to_seconds"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals=0; 
     fix_char_length(12);
     maybe_null= 1;
+    return FALSE;
   }
   enum_monotonicity_info get_monotonicity_info() const;
   longlong val_int_endpoint(bool left_endp, bool *incl_endp);
@@ -148,11 +152,12 @@ public:
   Item_func_dayofmonth(THD *thd, Item *a): Item_long_func_date_field(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "dayofmonth"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals=0; 
     max_length=2*MY_CHARSET_BIN_MB_MAXLEN;
-    maybe_null=1; 
+    maybe_null=1;
+    return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -187,11 +192,12 @@ public:
   }
   const char *func_name() const { return "month"; }
   const Type_handler *type_handler() const { return &type_handler_long; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals= 0;
     fix_char_length(2);
     maybe_null=1;
+    return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -211,7 +217,7 @@ public:
   Item_func_monthname(THD *thd, Item *a): Item_str_func(thd, a) {}
   const char *func_name() const { return "monthname"; }
   String *val_str(String *str);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool check_partition_func_processor(void *int_arg) {return TRUE;}
   bool check_valid_arguments_processor(void *int_arg)
   {
@@ -232,11 +238,12 @@ public:
   Item_func_dayofyear(THD *thd, Item *a): Item_long_func_date_field(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "dayofyear"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals= 0;
     fix_char_length(3);
     maybe_null=1;
+    return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -255,11 +262,12 @@ public:
   Item_func_hour(THD *thd, Item *a): Item_long_func_time_field(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "hour"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals=0;
     max_length=2*MY_CHARSET_BIN_MB_MAXLEN;
     maybe_null=1;
+    return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -278,11 +286,12 @@ public:
   Item_func_minute(THD *thd, Item *a): Item_long_func_time_field(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "minute"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals=0;
     max_length=2*MY_CHARSET_BIN_MB_MAXLEN;
     maybe_null=1;
+    return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -301,11 +310,12 @@ public:
   Item_func_quarter(THD *thd, Item *a): Item_long_func_date_field(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "quarter"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
      decimals=0;
      max_length=1*MY_CHARSET_BIN_MB_MAXLEN;
      maybe_null=1;
+     return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -324,11 +334,12 @@ public:
   Item_func_second(THD *thd, Item *a): Item_long_func_time_field(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "second"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals=0;
     max_length=2*MY_CHARSET_BIN_MB_MAXLEN;
     maybe_null=1;
+    return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -353,11 +364,12 @@ public:
   Item_func_week(THD *thd, Item *a, Item *b): Item_long_func(thd, a, b) {}
   longlong val_int();
   const char *func_name() const { return "week"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals=0;
     max_length=2*MY_CHARSET_BIN_MB_MAXLEN;
     maybe_null=1;
+    return FALSE;
   }
   bool check_vcol_func_processor(void *arg)
   {
@@ -385,11 +397,12 @@ public:
    :Item_long_func(thd, a, b) {}
   longlong val_int();
   const char *func_name() const { return "yearweek"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals=0;
     max_length=6*MY_CHARSET_BIN_MB_MAXLEN;
     maybe_null=1;
+    return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -410,11 +423,12 @@ public:
   const char *func_name() const { return "year"; }
   enum_monotonicity_info get_monotonicity_info() const;
   longlong val_int_endpoint(bool left_endp, bool *incl_endp);
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals=0;
     max_length=4*MY_CHARSET_BIN_MB_MAXLEN;
     maybe_null=1;
+    return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -450,11 +464,12 @@ public:
     return type_handler()->Item_get_date(this, ltime, fuzzydate);
   }
   const Type_handler *type_handler() const { return &type_handler_long; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals= 0;
     fix_char_length(1);
     maybe_null=1;
+    return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -474,7 +489,7 @@ class Item_func_dayname :public Item_func_weekday
   const char *func_name() const { return "dayname"; }
   String *val_str(String *str);
   const Type_handler *type_handler() const { return &type_handler_varchar; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool check_partition_func_processor(void *int_arg) {return TRUE;}
   bool check_vcol_func_processor(void *arg)
   {
@@ -535,9 +550,10 @@ public:
       return FALSE;
     return mark_unsupported_function(func_name(), "()", arg, VCOL_TIME_FUNC);
   }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    fix_length_and_dec_generic(arg_count ? args[0]->datetime_precision() : 0);
+    fix_length_and_dec_generic(arg_count ?  args[0]->datetime_precision() : 0);
+    return FALSE;
   }
   longlong int_op();
   my_decimal *decimal_op(my_decimal* buf);
@@ -558,9 +574,10 @@ public:
   {
     return !has_time_args();
   }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     fix_length_and_dec_generic(args[0]->time_precision());
+    return FALSE;
   }
   longlong int_op();
   my_decimal *decimal_op(my_decimal* buf);
@@ -629,10 +646,11 @@ public:
   Item_datefunc(THD *thd, Item *a): Item_temporal_func(thd, a) { }
   Item_datefunc(THD *thd, Item *a, Item *b): Item_temporal_func(thd, a, b) { }
   const Type_handler *type_handler() const { return &type_handler_newdate; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     fix_attributes_date();
     maybe_null= (arg_count > 0);
+    return FALSE;
   }
 };
 
@@ -670,7 +688,7 @@ public:
   Item_func_curtime(THD *thd, uint dec): Item_timefunc(thd), last_query_id(0)
   { decimals= dec; }
   bool fix_fields(THD *, Item **);
-  void fix_length_and_dec() { fix_attributes_time(decimals); }
+  bool fix_length_and_dec() { fix_attributes_time(decimals); return FALSE; }
   bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date);
   /* 
     Abstract method that defines which time zone is used for conversion.
@@ -757,7 +775,8 @@ public:
   Item_func_now(THD *thd, uint dec): Item_datetimefunc(thd), last_query_id(0)
   { decimals= dec; }
   bool fix_fields(THD *, Item **);
-  void fix_length_and_dec() { fix_attributes_datetime(decimals); }
+  bool fix_length_and_dec()
+  { fix_attributes_datetime(decimals); return FALSE;}
   bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date);
   virtual void store_now_in_TIME(THD *thd, MYSQL_TIME *now_time)=0;
   bool check_vcol_func_processor(void *arg)
@@ -864,7 +883,7 @@ public:
     Item_str_func(thd, a, b, c), locale(0), is_time_format(false) {}
   String *val_str(String *str);
   const char *func_name() const { return "date_format"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   uint format_length(const String *format);
   bool eq(const Item *item, bool binary_cmp) const;
   bool check_vcol_func_processor(void *arg)
@@ -897,7 +916,7 @@ class Item_func_from_unixtime :public Item_datetimefunc
  public:
   Item_func_from_unixtime(THD *thd, Item *a): Item_datetimefunc(thd, a) {}
   const char *func_name() const { return "from_unixtime"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_from_unixtime>(thd, this); }
@@ -937,10 +956,11 @@ class Item_func_convert_tz :public Item_datetimefunc
   Item_func_convert_tz(THD *thd, Item *a, Item *b, Item *c):
     Item_datetimefunc(thd, a, b, c), from_tz_cached(0), to_tz_cached(0) {}
   const char *func_name() const { return "convert_tz"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     fix_attributes_datetime(args[0]->datetime_precision());
     maybe_null= true;
+    return FALSE;
   }
   bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date);
   void cleanup();
@@ -956,10 +976,11 @@ class Item_func_sec_to_time :public Item_timefunc
 public:
   Item_func_sec_to_time(THD *thd, Item *item): Item_timefunc(thd, item) {}
   bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     fix_attributes_time(args[0]->decimals);
     maybe_null= true;
+    return FALSE;
   }
   const char *func_name() const { return "sec_to_time"; }
   Item *get_copy(THD *thd)
@@ -977,7 +998,7 @@ public:
     Item_temporal_hybrid_func(thd, a, b),int_type(type_arg),
     date_sub_interval(neg_arg) {}
   const char *func_name() const { return "date_add_interval"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date);
   bool eq(const Item *item, bool binary_cmp) const;
   void print(String *str, enum_query_type query_type);
@@ -1045,7 +1066,7 @@ class Item_extract :public Item_int_func
   longlong val_int();
   enum Functype functype() const { return EXTRACT_FUNC; }
   const char *func_name() const { return "extract"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool eq(const Item *item, bool binary_cmp) const;
   void print(String *str, enum_query_type query_type);
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
@@ -1125,9 +1146,9 @@ public:
     fix_length_and_dec_generic();
     m_suppress_warning_to_error_escalation= true;
   }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    args[0]->type_handler()->Item_char_typecast_fix_length_and_dec(this);
+    return args[0]->type_handler()->Item_char_typecast_fix_length_and_dec(this);
   }
   void print(String *str, enum_query_type query_type);
   bool need_parentheses_in_default() { return true; }
@@ -1152,9 +1173,9 @@ public:
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date);
   const char *cast_type() const { return "date"; }
   const Type_handler *type_handler() const { return &type_handler_newdate; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    args[0]->type_handler()->Item_date_typecast_fix_length_and_dec(this);
+    return args[0]->type_handler()->Item_date_typecast_fix_length_and_dec(this);
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_date_typecast>(thd, this); }
@@ -1170,9 +1191,10 @@ public:
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date);
   const char *cast_type() const { return "time"; }
   const Type_handler *type_handler() const { return &type_handler_time2; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    args[0]->type_handler()->Item_time_typecast_fix_length_and_dec(this);
+    return args[0]->type_handler()->
+           Item_time_typecast_fix_length_and_dec(this);
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_time_typecast>(thd, this); }
@@ -1188,9 +1210,10 @@ public:
   const char *cast_type() const { return "datetime"; }
   const Type_handler *type_handler() const { return &type_handler_datetime2; }
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date);
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    args[0]->type_handler()->Item_datetime_typecast_fix_length_and_dec(this);
+    return args[0]->type_handler()->
+           Item_datetime_typecast_fix_length_and_dec(this);
   }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_datetime_typecast>(thd, this); }
@@ -1220,7 +1243,7 @@ public:
   Item_func_add_time(THD *thd, Item *a, Item *b, bool type_arg, bool neg_arg):
     Item_temporal_hybrid_func(thd, a, b), is_date(type_arg)
   { sign= neg_arg ? -1 : 1; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date);
   void print(String *str, enum_query_type query_type);
   const char *func_name() const { return "add_time"; }
@@ -1235,11 +1258,12 @@ class Item_func_timediff :public Item_timefunc
 public:
   Item_func_timediff(THD *thd, Item *a, Item *b): Item_timefunc(thd, a, b) {}
   const char *func_name() const { return "timediff"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     uint dec= MY_MAX(args[0]->time_precision(), args[1]->time_precision());
     fix_attributes_time(dec);
     maybe_null= true;
+    return FALSE;
   }
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date);
   Item *get_copy(THD *thd)
@@ -1257,10 +1281,11 @@ public:
   Item_func_maketime(THD *thd, Item *a, Item *b, Item *c):
     Item_timefunc(thd, a, b, c)
   {}
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     fix_attributes_time(args[2]->decimals);
     maybe_null= true;
+    return FALSE;
   }
   const char *func_name() const { return "maketime"; }
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date);
@@ -1275,11 +1300,12 @@ public:
   Item_func_microsecond(THD *thd, Item *a): Item_long_func_time_field(thd, a) {}
   longlong val_int();
   const char *func_name() const { return "microsecond"; }
-  void fix_length_and_dec()
-  { 
+  bool fix_length_and_dec()
+  {
     decimals=0;
     maybe_null=1;
     fix_char_length(6);
+    return FALSE;
   }
   bool check_partition_func_processor(void *int_arg) {return FALSE;}
   bool check_vcol_func_processor(void *arg) { return FALSE;}
@@ -1302,10 +1328,11 @@ public:
     Item_longlong_func(thd, a, b), int_type(type_arg) {}
   const char *func_name() const { return "timestampdiff"; }
   longlong val_int();
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals=0;
     maybe_null=1;
+    return FALSE;
   }
   virtual void print(String *str, enum_query_type query_type);
   Item *get_copy(THD *thd)
@@ -1327,11 +1354,12 @@ public:
   {}
   String *val_str_ascii(String *str);
   const char *func_name() const { return "get_format"; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     maybe_null= 1;
     decimals=0;
     fix_length_and_charset(17, default_charset());
+    return FALSE;
   }
   virtual void print(String *str, enum_query_type query_type);
   Item *get_copy(THD *thd)
@@ -1353,7 +1381,7 @@ public:
   {}
   bool get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date);
   const char *func_name() const { return "str_to_date"; }
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_str_to_date>(thd, this); }
 };
diff --git a/sql/item_vers.h b/sql/item_vers.h
index 17ad3daa73c..8b9c0e6056c 100644
--- a/sql/item_vers.h
+++ b/sql/item_vers.h
@@ -38,7 +38,8 @@ public:
   bool get_date(MYSQL_TIME *res, ulonglong fuzzy_date);
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_func_trt_ts>(thd, this); }
-  void fix_length_and_dec() { fix_attributes_datetime(decimals); }
+  bool fix_length_and_dec()
+  { fix_attributes_datetime(decimals); return FALSE; }
 };
 
 class Item_func_trt_id : public Item_longlong_func
@@ -69,10 +70,11 @@ public:
     return NULL;
   }
 
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
-    Item_int_func::fix_length_and_dec();
+    bool res= Item_int_func::fix_length_and_dec();
     max_length= 20;
+    return res;
   }
 
   longlong val_int();
diff --git a/sql/item_windowfunc.cc b/sql/item_windowfunc.cc
index 66c4f5be665..b523235b3ad 100644
--- a/sql/item_windowfunc.cc
+++ b/sql/item_windowfunc.cc
@@ -122,7 +122,8 @@ Item_window_func::fix_fields(THD *thd, Item **ref)
   with_window_func= true;
   with_sum_func= false;
 
-  fix_length_and_dec();
+  if (fix_length_and_dec())
+    return TRUE;
 
   max_length= window_func()->max_length;
   maybe_null= window_func()->maybe_null;
@@ -362,7 +363,8 @@ bool Item_sum_hybrid_simple::fix_fields(THD *thd, Item **ref)
   maybe_null= 1;
   result_field=0;
   null_value=1;
-  fix_length_and_dec();
+  if (fix_length_and_dec())
+    return TRUE;
 
   if (check_sum_func(thd, ref))
     return TRUE;
diff --git a/sql/item_windowfunc.h b/sql/item_windowfunc.h
index cb85a2c06d1..48851da7d96 100644
--- a/sql/item_windowfunc.h
+++ b/sql/item_windowfunc.h
@@ -526,10 +526,11 @@ class Item_sum_percent_rank: public Item_sum_window_with_row_count
   bool add();
   const Type_handler *type_handler() const { return &type_handler_double; }
 
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals = 10;  // TODO-cvicentiu find out how many decimals the standard
                     // requires.
+    return FALSE;
   }
 
   void setup_window_func(THD *thd, Window_spec *window_spec);
@@ -614,10 +615,11 @@ class Item_sum_cume_dist: public Item_sum_window_with_row_count
   void update_field() {}
   const Type_handler *type_handler() const { return &type_handler_double; }
 
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals = 10;  // TODO-cvicentiu find out how many decimals the standard
                     // requires.
+    return FALSE;
   }
   
   Item *get_copy(THD *thd)
@@ -820,10 +822,11 @@ public:
   const Type_handler *type_handler() const
   {return Type_handler_hybrid_field_type::type_handler();}
 
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals = 10;  // TODO-cvicentiu find out how many decimals the standard
                     // requires.
+    return FALSE;
   }
 
   Item *get_copy(THD *thd)
@@ -950,10 +953,11 @@ public:
   const Type_handler *type_handler() const
   {return Type_handler_hybrid_field_type::type_handler();}
 
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals = 10;  // TODO-cvicentiu find out how many decimals the standard
                     // requires.
+    return FALSE;
   }
 
   Item *get_copy(THD *thd)
@@ -1292,9 +1296,10 @@ public:
   void split_sum_func(THD *thd, Ref_ptr_array ref_pointer_array,
                               List<Item> &fields, uint flags);
 
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     decimals = window_func()->decimals;
+    return FALSE;
   }
 
   const char* func_name() const { return "WF"; }
diff --git a/sql/item_xmlfunc.cc b/sql/item_xmlfunc.cc
index 63cc07fa34c..63734ecf9ac 100644
--- a/sql/item_xmlfunc.cc
+++ b/sql/item_xmlfunc.cc
@@ -222,13 +222,14 @@ public:
     return str;
   }
   enum Item_result result_type () const { return STRING_RESULT; }
-  void fix_length_and_dec()
+  bool fix_length_and_dec()
   {
     max_length= MAX_BLOB_WIDTH;
     collation.collation= pxml->charset();
     // To avoid premature evaluation, mark all nodeset functions as non-const.
     used_tables_cache= RAND_TABLE_BIT;
     const_item_cache= false;
+    return FALSE;
   }
   const char *func_name() const { return "nodeset"; }
   bool check_vcol_func_processor(void *arg)
@@ -456,7 +457,7 @@ public:
     Item_nodeset_func(thd, pxml), string_cache(str_arg) { }
   String *val_nodeset(String *res)
   { return string_cache; }
-  void fix_length_and_dec() { max_length= MAX_BLOB_WIDTH; }
+  bool fix_length_and_dec() { max_length= MAX_BLOB_WIDTH;; return FALSE;  }
   Item *get_copy(THD *thd)
   { return get_item_copy<Item_nodeset_context_cache>(thd, this); }
 };
@@ -470,7 +471,7 @@ public:
   Item_func_xpath_position(THD *thd, Item *a, String *p):
     Item_long_func(thd, a), pxml(p) {}
   const char *func_name() const { return "xpath_position"; }
-  void fix_length_and_dec() { max_length=10; }
+  bool fix_length_and_dec() { max_length=10; return FALSE; }
   longlong val_int()
   {
     String *flt= args[0]->val_nodeset(&tmp_value);
@@ -491,7 +492,7 @@ public:
   Item_func_xpath_count(THD *thd, Item *a, String *p):
     Item_long_func(thd, a), pxml(p) {}
   const char *func_name() const { return "xpath_count"; }
-  void fix_length_and_dec() { max_length=10; }
+  bool fix_length_and_dec() { max_length=10; return FALSE; }
   longlong val_int()
   {
     uint predicate_supplied_context_size;
@@ -2728,10 +2729,10 @@ my_xpath_parse(MY_XPATH *xpath, const char *str, const char *strend)
 }
 
 
-void Item_xml_str_func::fix_length_and_dec()
+bool Item_xml_str_func::fix_length_and_dec()
 {
   max_length= MAX_BLOB_WIDTH;
-  agg_arg_charsets_for_comparison(collation, args, arg_count);
+  return agg_arg_charsets_for_comparison(collation, args, arg_count);
 }
 
 
diff --git a/sql/item_xmlfunc.h b/sql/item_xmlfunc.h
index 33e85ba5628..6846063aab7 100644
--- a/sql/item_xmlfunc.h
+++ b/sql/item_xmlfunc.h
@@ -82,7 +82,7 @@ public:
     maybe_null= TRUE;
   }
   bool fix_fields(THD *thd, Item **ref);
-  void fix_length_and_dec();
+  bool fix_length_and_dec();
   bool const_item() const
   {
     return const_item_cache && (!nodeset_func || nodeset_func->const_item());
diff --git a/sql/sql_select.cc b/sql/sql_select.cc
index 54bb877ea2f..73bd29642ef 100644
--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -14034,7 +14034,8 @@ COND *Item_func_eq::build_equal_items(THD *thd,
       List_iterator_fast<Item_equal> it(cond_equal.current_level);
       while ((item_equal= it++))
       {
-        item_equal->fix_length_and_dec();
+        if (item_equal->fix_length_and_dec())
+          return NULL;
         item_equal->update_used_tables();
         set_if_bigger(thd->lex->current_select->max_equal_elems,
                       item_equal->n_field_items());  
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 6835d92773c..2b0c4439146 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -4961,7 +4961,12 @@ int create_table_impl(THD *thd,
     file= mysql_create_frm_image(thd, orig_db, orig_table_name, create_info,
                                  alter_info, create_table_mode, key_info,
                                  key_count, frm);
-    if (!file)
+    /*
+    TODO: remove this check of thd->is_error() (now it intercept
+    errors in some val_*() methoids and bring some single place to
+    such error interception).
+    */
+    if (!file || thd->is_error())
       goto err;
     if (rea_create_table(thd, frm, path, db->str, table_name->str, create_info,
                          file, frm_only))
@@ -7621,10 +7626,15 @@ static bool mysql_inplace_alter_table(THD *thd,
   /*
     Replace the old .FRM with the new .FRM, but keep the old name for now.
     Rename to the new name (if needed) will be handled separately below.
+
+    TODO: remove this check of thd->is_error() (now it intercept
+    errors in some val_*() methoids and bring some single place to
+    such error interception).
   */
   if (mysql_rename_table(db_type, &alter_ctx->new_db, &alter_ctx->tmp_name,
                          &alter_ctx->db, &alter_ctx->alias,
-                         FN_FROM_IS_TMP | NO_HA_TABLE))
+                         FN_FROM_IS_TMP | NO_HA_TABLE) ||
+                         thd->is_error())
   {
     // Since changes were done in-place, we can't revert them.
     (void) quick_rm_table(thd, db_type,