Fixed failing test cases 'row.test' when running with --ps-protocol

Simple optimzations done while reviewing code


client/mysqltest.c:
  Added options --enable-ps-warnings and --disable-ps-warnings
  (to fix failing test case)
mysql-test/t/row.test:
  Disable warnings that comes from 'parse' parth
sql/field.cc:
  Removed calls to is_null() in field functions.
  (Not needed as NULL handling is done on the level above fields)
  Indentation fixes
  Removed calls to alloca() as buffer needed was quite small.
sql/field.h:
  Indentation changes and comment fixes
sql/filesort.cc:
  Simple optimization during code review
sql/item.cc:
  Indentation fixes
  Removed some unnecessary tests (added DBUG_ASSERTS() instead)
sql/item_buff.cc:
  Indentation fixes
sql/my_decimal.cc:
  Indentation fixes
  Simple optimization
  Fixed compiler warning
sql/sql_update.cc:
  Removed unnessessary assignment

7 files changed, 106 insertions, 115 deletions

diff --git a/sql/field.cc b/sql/field.cc
index bc95e1dab54..f51b06028f7 100644
--- a/sql/field.cc
+++ b/sql/field.cc
@@ -572,8 +572,7 @@ my_decimal* Field_num::val_decimal(my_decimal *decimal_value)
 {
   DBUG_ASSERT(result_type() == INT_RESULT);
   longlong nr= val_int();
-  if (!is_null())
-    int2my_decimal(E_DEC_FATAL_ERROR, nr, unsigned_flag, decimal_value);
+  int2my_decimal(E_DEC_FATAL_ERROR, nr, unsigned_flag, decimal_value);
   return decimal_value;
 }
 
@@ -605,7 +604,7 @@ void Field_num::make_field(Send_field *field)
     d         value for storing
 
   NOTE
-    Field_str is the base class for fields like Field_date, and some
+    Field_str is the base class for fields like Field_enum, Field_date and some
     similar.  Some dates use fraction and also string value should be
     converted to floating point value according our rules, so we use double
     to store value of decimal in string
@@ -629,8 +628,7 @@ my_decimal *Field_str::val_decimal(my_decimal *decimal_value)
 {
   DBUG_ASSERT(result_type() == INT_RESULT);
   longlong nr= val_int();
-  if (is_null())
-    int2my_decimal(E_DEC_FATAL_ERROR, nr, 0, decimal_value);
+  int2my_decimal(E_DEC_FATAL_ERROR, nr, 0, decimal_value);
   return decimal_value;
 }
 
@@ -733,6 +731,7 @@ Field *Field::new_key_field(MEM_ROOT *root, struct st_table *new_table,
   return tmp;
 }
 
+
 /* 
   SYNOPSIS
   Field::quote_data()
@@ -749,44 +748,35 @@ Field *Field::new_key_field(MEM_ROOT *root, struct st_table *new_table,
     void      Upon prepending/appending quotes on each side of variable
 
 */
+
 bool Field::quote_data(String *unquoted_string)
 {
   char escaped_string[IO_SIZE];
   char *unquoted_string_buffer= (char *)(unquoted_string->ptr());
   uint need_quotes;
-  
   DBUG_ENTER("Field::quote_data");
+
   // this is the same call that mysql_real_escape_string() calls
   escape_string_for_mysql(&my_charset_bin, (char *)escaped_string,
     unquoted_string->ptr(), unquoted_string->length());
 
-
-  if (is_null())
-    DBUG_RETURN(0);
-
   need_quotes= needs_quotes();
 
   if (need_quotes == 0)
-  {
     DBUG_RETURN(0);
-  }
-  else
-  {
-    // reset string, then re-append with quotes and escaped values
-    unquoted_string->length(0);
-    if (unquoted_string->append("'"))
-      DBUG_RETURN(1);
-    if (unquoted_string->append((char *)escaped_string))
-      DBUG_RETURN(1);
-    if (unquoted_string->append("'"))
-      DBUG_RETURN(1);
-  }
-  //DBUG_PRINT("Field::quote_data",
-   // ("FINAL quote_flag %d unquoted_string %s escaped_string %s", 
-    //needs_quotes, unquoted_string->c_ptr_quick(), escaped_string));
+
+  // reset string, then re-append with quotes and escaped values
+  unquoted_string->length(0);
+  if (unquoted_string->append('\''))
+    DBUG_RETURN(1);
+  if (unquoted_string->append((char *)escaped_string))
+    DBUG_RETURN(1);
+  if (unquoted_string->append('\''))
+    DBUG_RETURN(1);
   DBUG_RETURN(0);
 }
 
+
 /*
   Quote a field type if needed
 
@@ -802,6 +792,7 @@ bool Field::quote_data(String *unquoted_string)
       0   if value is of type NOT needing quotes
       1   if value is of type needing quotes
 */
+
 bool Field::needs_quotes(void)
 {
   DBUG_ENTER("Field::type_quote");
@@ -840,9 +831,9 @@ bool Field::needs_quotes(void)
   default: DBUG_RETURN(0);
   }
   DBUG_RETURN(0);
-
 }
 
+
 /****************************************************************************
   Field_null, a field that always return NULL
 ****************************************************************************/
@@ -4646,8 +4637,6 @@ String *Field_newdate::val_str(String *val_buffer,
 
 bool Field_newdate::get_date(TIME *ltime,uint fuzzydate)
 {
-  if (is_null())
-    return 1;
   uint32 tmp=(uint32) uint3korr(ptr);
   ltime->day=   tmp & 31;
   ltime->month= (tmp >> 5) & 15;
@@ -5058,17 +5047,16 @@ int Field_string::store(longlong nr)
   return Field_string::store(buff,(uint)l,cs);
 }
 
+
 int Field_longstr::store_decimal(const my_decimal *d)
 {
-  uint buf_size= my_decimal_string_length(d);
-  char *buff= (char *)my_alloca(buf_size);
-  String str(buff, buf_size, &my_charset_bin);
+  char buff[DECIMAL_MAX_STR_LENGTH+1];
+  String str(buff, sizeof(buff), &my_charset_bin);
   my_decimal2string(E_DEC_FATAL_ERROR, d, 0, 0, 0, &str);
-  int result= store(str.ptr(), str.length(), str.charset());
-  my_afree(buff);
-  return result;
+  return store(str.ptr(), str.length(), str.charset());
 }
 
+
 double Field_string::val_real(void)
 {
   int not_used;
diff --git a/sql/field.h b/sql/field.h
index 327fb4c885b..cfed2eb19e1 100644
--- a/sql/field.h
+++ b/sql/field.h
@@ -367,7 +367,9 @@ public:
   my_decimal *val_decimal(my_decimal *);
 };
 
-/* base class for Item_string, Item_valstring, Item_blob */
+
+/* base class for Field_string, Field_varstring and Field_blob */
+
 class Field_longstr :public Field_str
 {
 public:
@@ -1181,7 +1183,9 @@ public:
   bool has_charset(void) const
   { return charset() == &my_charset_bin ? FALSE : TRUE; }
   field_cast_enum field_cast_type() { return FIELD_CAST_BLOB; }
-  uint32 max_length();};
+  uint32 max_length();
+};
+
 
 #ifdef HAVE_SPATIAL
 class Field_geom :public Field_blob {
diff --git a/sql/filesort.cc b/sql/filesort.cc
index 956ac2ef61b..c05baa7cc04 100644
--- a/sql/filesort.cc
+++ b/sql/filesort.cc
@@ -619,20 +619,21 @@ static void make_sortkey(register SORTPARAM *param,
     else
     {						// Item
       Item *item=sort_field->item;
+      maybe_null= item->maybe_null;
       switch (sort_field->result_type) {
       case STRING_RESULT:
 	{
           CHARSET_INFO *cs=item->collation.collation;
 	  char fill_char= ((cs->state & MY_CS_BINSORT) ? (char) 0 : ' ');
 
-	  if ((maybe_null=item->maybe_null))
+	  if (maybe_null)
 	    *to++=1;
 	  /* All item->str() to use some extra byte for end null.. */
 	  String tmp((char*) to,sort_field->length+4,cs);
 	  String *res=item->val_str(&tmp);
 	  if (!res)
 	  {
-	    if (item->maybe_null)
+	    if (maybe_null)
 	      bzero((char*) to-1,sort_field->length+1);
 	    else
 	    {
@@ -672,20 +673,22 @@ static void make_sortkey(register SORTPARAM *param,
       case INT_RESULT:
 	{
 	  longlong value=item->val_int();
-	  if ((maybe_null=item->maybe_null))
+	  if (maybe_null)
+          {
 	    *to++=1;				/* purecov: inspected */
-	  if (item->null_value)
-	  {
-	    if (item->maybe_null)
-	      bzero((char*) to-1,sort_field->length+1);
-	    else
-	    {
-	      DBUG_PRINT("warning",
-			 ("Got null on something that shouldn't be null"));
-	      bzero((char*) to,sort_field->length);
-	    }
-	    break;
-	  }
+            if (item->null_value)
+            {
+              if (maybe_null)
+                bzero((char*) to-1,sort_field->length+1);
+              else
+              {
+                DBUG_PRINT("warning",
+                           ("Got null on something that shouldn't be null"));
+                bzero((char*) to,sort_field->length);
+              }
+              break;
+            }
+          }
 #if SIZEOF_LONG_LONG > 4
 	  to[7]= (uchar) value;
 	  to[6]= (uchar) (value >> 8);
@@ -706,14 +709,16 @@ static void make_sortkey(register SORTPARAM *param,
       case DECIMAL_RESULT:
         {
           my_decimal dec_buf, *dec_val= item->val_decimal(&dec_buf);
-          if ((maybe_null=item->null_value))
-          { 
-            bzero((char*)to, sort_field->length+1);
-            to++;
-            break;
-          }
-          if ((maybe_null=item->maybe_null))
+          if (maybe_null)
+          {
+            if (item->null_value)
+            { 
+              bzero((char*)to, sort_field->length+1);
+              to++;
+              break;
+            }
             *to++=1;
+          }
           my_decimal2binary(E_DEC_FATAL_ERROR, dec_val, (byte*)to,
                             item->max_length - (item->decimals ? 1:0),
                             item->decimals);
@@ -722,14 +727,16 @@ static void make_sortkey(register SORTPARAM *param,
       case REAL_RESULT:
 	{
 	  double value= item->val_real();
-	  if ((maybe_null=item->null_value))
-	  {
-	    bzero((char*) to,sort_field->length+1);
-	    to++;
-	    break;
-	  }
-	  if ((maybe_null=item->maybe_null))
+	  if (maybe_null)
+          {
+            if (item->null_value)
+            {
+              bzero((char*) to,sort_field->length+1);
+              to++;
+              break;
+            }
 	    *to++=1;
+          }
 	  change_double_for_sort(value,(byte*) to);
 	  break;
 	}
diff --git a/sql/item.cc b/sql/item.cc
index 53d9d532b3d..4eb4e017ef2 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -48,10 +48,10 @@ void item_init(void)
 /*
 TODO: make this functions class dependent
 */
+
 bool Item::val_bool()
 {
-  switch(result_type())
-  {
+  switch(result_type()) {
   case INT_RESULT:
     return val_int();
   case DECIMAL_RESULT:
@@ -68,6 +68,7 @@ bool Item::val_bool()
   case ROW_RESULT:
   default:
     DBUG_ASSERT(0);
+    return 0;                                   // Wrong (but safe)
   }
 }
 
@@ -991,8 +992,7 @@ bool Item_field::val_bool_result()
 {
   if ((null_value= result_field->is_null()))
     return FALSE;
-  switch (result_field->result_type())
-  {
+  switch (result_field->result_type()) {
   case INT_RESULT:
     return result_field->val_int();
   case DECIMAL_RESULT:
@@ -1060,8 +1060,9 @@ Item *Item_field::get_tmp_table_item(THD *thd)
 
 
 /*
-  Create an item from a string we KNOW points to a valid longlong/ulonglong
-  end \0 terminated number string
+  Create an item from a string we KNOW points to a valid longlong
+  end \0 terminated number string.
+  This is always 'signed'. Unsigned values are created with Item_uint()
 */
 
 Item_int::Item_int(const char *str_arg, uint length)
@@ -1071,7 +1072,6 @@ Item_int::Item_int(const char *str_arg, uint length)
   value= my_strtoll10(str_arg, &end_ptr, &error);
   max_length= (uint) (end_ptr - str_arg);
   name= (char*) str_arg;
-  unsigned_flag= value > 0;
   fixed= 1;
 }
 
@@ -2436,8 +2436,8 @@ bool Item_field::fix_fields(THD *thd, TABLE_LIST *tables, Item **reference)
 	  rf is Item_ref => never substitute other items (in this case)
 	  during fix_fields() => we can use rf after fix_fields()
 	*/
-        if (!rf->fixed &&
-            rf->fix_fields(thd, tables, reference) || rf->check_cols(1))
+        DBUG_ASSERT(!rf->fixed);                // Assured by Item_ref()
+        if (rf->fix_fields(thd, tables, reference) || rf->check_cols(1))
 	  return TRUE;
 
 	mark_as_dependent(thd, last, current_sel, rf);
@@ -2458,8 +2458,8 @@ bool Item_field::fix_fields(THD *thd, TABLE_LIST *tables, Item **reference)
 	    rf is Item_ref => never substitute other items (in this case)
 	    during fix_fields() => we can use rf after fix_fields()
 	  */
-          return (!rf->fixed &&
-                  rf->fix_fields(thd, tables, reference) ||  rf->check_cols(1));
+          DBUG_ASSERT(!rf->fixed);                // Assured by Item_ref()
+          return (rf->fix_fields(thd, tables, reference) || rf->check_cols(1));
 	}
       }
     }
@@ -2706,8 +2706,7 @@ void Item_empty_string::make_field(Send_field *tmp_field)
 
 enum_field_types Item::field_type() const
 {
-  switch (result_type())
-  {
+  switch (result_type()) {
   case STRING_RESULT:  return MYSQL_TYPE_VARCHAR;
   case INT_RESULT:     return FIELD_TYPE_LONGLONG;
   case DECIMAL_RESULT: return FIELD_TYPE_NEWDECIMAL;
@@ -2715,8 +2714,8 @@ enum_field_types Item::field_type() const
   case ROW_RESULT:
   default:
     DBUG_ASSERT(0);
-    return FIELD_TYPE_VAR_STRING;
-  };
+    return MYSQL_TYPE_VARCHAR;
+  }
 }
 
 
@@ -3662,18 +3661,17 @@ bool Item_ref::val_bool_result()
   {
     if ((null_value= result_field->is_null()))
       return 0;
-    switch (result_field->result_type())
-    {
+    switch (result_field->result_type()) {
     case INT_RESULT:
       return result_field->val_int();
     case DECIMAL_RESULT:
-      {
-        my_decimal decimal_value;
-        my_decimal *val= result_field->val_decimal(&decimal_value);
-        if (val)
-          return !my_decimal_is_zero(val);
-        return 0;
-      }
+    {
+      my_decimal decimal_value;
+      my_decimal *val= result_field->val_decimal(&decimal_value);
+      if (val)
+        return !my_decimal_is_zero(val);
+      return 0;
+    }
     case REAL_RESULT:
     case STRING_RESULT:
       return result_field->val_real() != 0.0;
@@ -4049,8 +4047,7 @@ void resolve_const_item(THD *thd, Item **ref, Item *comp_item)
 				     item->result_type());
   char *name=item->name;			// Alloced by sql_alloc
 
-  switch (res_type)
-  {
+  switch (res_type) {
   case STRING_RESULT:
   {
     char buff[MAX_FIELD_WIDTH];
@@ -4146,8 +4143,7 @@ bool field_is_equal_to_item(Field *field,Item *item)
 
 Item_cache* Item_cache::get_cache(Item_result type)
 {
-  switch (type)
-  {
+  switch (type) {
   case INT_RESULT:
     return new Item_cache_int();
   case REAL_RESULT:
@@ -4617,8 +4613,7 @@ uint32 Item_type_holder::real_length(Item *item)
   if (item->type() == Item::FIELD_ITEM)
     return ((Item_field *)item)->max_disp_length();
 
-  switch (item->result_type())
-  {
+  switch (item->result_type()) {
   case STRING_RESULT:
   case DECIMAL_RESULT:
     return item->max_length;
diff --git a/sql/item_buff.cc b/sql/item_buff.cc
index 7c77f7fa3bc..af17d377e31 100644
--- a/sql/item_buff.cc
+++ b/sql/item_buff.cc
@@ -28,8 +28,7 @@ Item_buff *new_Item_buff(Item *item)
   if (item->type() == Item::FIELD_ITEM &&
       !(((Item_field *) item)->field->flags & BLOB_FLAG))
     return new Item_field_buff((Item_field *) item);
-  switch (item->result_type())
-  {
+  switch (item->result_type()) {
   case STRING_RESULT:
     return new Item_str_buff((Item_field *) item);
   case INT_RESULT:
diff --git a/sql/my_decimal.cc b/sql/my_decimal.cc
index 027b33f1d1c..f028b1fa1a1 100644
--- a/sql/my_decimal.cc
+++ b/sql/my_decimal.cc
@@ -23,16 +23,18 @@
     decimal_operation_results()
     result  decimal library return code (E_DEC_* see include/decimal.h)
 
-  return
+  TODO
+    Fix error messages
+
+  RETURN
     result
 */
+
 int decimal_operation_results(int result)
 {
-  switch (result)
-  {
+  switch (result) {
   case E_DEC_OK:
     break;
-//TODO: fix error messages
   case E_DEC_TRUNCATED:
     push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
 			WARN_DATA_TRUNCATED, ER(WARN_DATA_TRUNCATED),
@@ -78,20 +80,18 @@ int decimal_operation_results(int result)
 */
 
 int my_decimal2string(uint mask, const my_decimal *d,
-                   int fixed_prec, int fixed_dec,
-                   char filler, String *str)
+                      int fixed_prec, int fixed_dec,
+                      char filler, String *str)
 {
   int length= (fixed_prec ? (fixed_prec + 1) : my_decimal_string_length(d));
   int result;
   if (str->alloc(length))
-    return  check_result(mask, E_DEC_OOM);
-  char *sptr= (char *)str->ptr();
-  int res= decimal2string((decimal *)d, sptr,
-                          &length, fixed_prec, fixed_dec,
-                          filler);
-  result= check_result(mask, res);
+    return check_result(mask, E_DEC_OOM);
+  result= decimal2string((decimal*) d, (char*) str->ptr(),
+                         &length, fixed_prec, fixed_dec,
+                         filler);
   str->length(length);
-  return result;
+  return check_result(mask, result);
 }
 
 
@@ -171,7 +171,7 @@ int str2my_decimal(uint mask, const char *from, uint length,
   }
   my_decimal_set_zero(decimal_value);
   err= string2decimal((char *)from, (decimal *)decimal_value, &end);
-  if ((end-from) != length && !err)
+  if ((uint) (end-from) != length && !err)
     err= E_DEC_TRUNCATED;
   check_result(mask, err);
   return err;
diff --git a/sql/sql_update.cc b/sql/sql_update.cc
index f9df1be2abd..17179bf9c5f 100644
--- a/sql/sql_update.cc
+++ b/sql/sql_update.cc
@@ -264,10 +264,8 @@ int mysql_update(THD *thd,
   else if ((used_index=table->file->key_used_on_scan) < MAX_KEY)
     used_key_is_modified=check_if_key_used(table, used_index, fields);
   else
-  {
     used_key_is_modified=0;
-    used_index= MAX_KEY;
-  }
+
   if (used_key_is_modified || order)
   {
     /*