Auto merge from trunk

15 files changed, 149 insertions, 40 deletions

diff --git a/libmysql/Makefile.shared b/libmysql/Makefile.shared
index 71649b83991..71a4fd867bd 100644
--- a/libmysql/Makefile.shared
+++ b/libmysql/Makefile.shared
@@ -56,7 +56,7 @@ mysysobjects1 =		my_init.lo my_static.lo my_malloc.lo my_realloc.lo \
 			my_create.lo my_delete.lo mf_tempfile.lo my_open.lo \
 			my_file.lo my_read.lo my_write.lo errors.lo \
 			my_error.lo my_getwd.lo my_div.lo \
-			mf_pack.lo my_messnc.lo mf_dirname.lo mf_fn_ext.lo\
+			mf_pack.lo my_mess.lo mf_dirname.lo mf_fn_ext.lo\
 			mf_wcomp.lo typelib.lo safemalloc.lo my_alloc.lo \
 			mf_format.lo mf_path.lo mf_unixpath.lo my_fopen.lo \
 			my_symlink.lo my_fstream.lo mf_arr_appstr.lo \
diff --git a/mysql-test/r/mdl_sync.result b/mysql-test/r/mdl_sync.result
index 8f236521f99..b78b8dadc77 100644
--- a/mysql-test/r/mdl_sync.result
+++ b/mysql-test/r/mdl_sync.result
@@ -2390,8 +2390,8 @@ SHOW FULL COLUMNS FROM t1;
 SET DEBUG_SYNC= "now WAIT_FOR waiting";
 SHOW FULL COLUMNS FROM t1;
 Field	Type	Collation	Null	Key	Default	Extra	Privileges	Comment
-a	char(255)	latin1_swedish_ci	YES		NULL		select,insert,update,references	
+a	char(255)	latin1_swedish_ci	YES		NULL		#	
 SET DEBUG_SYNC= "now SIGNAL completed";
 Field	Type	Collation	Null	Key	Default	Extra	Privileges	Comment
-a	char(255)	latin1_swedish_ci	YES		NULL		select,insert,update,references	
+a	char(255)	latin1_swedish_ci	YES		NULL		#	
 DROP TABLE t1;
diff --git a/mysql-test/r/merge.result b/mysql-test/r/merge.result
index ff9b1a84dbc..e46d8e75ab1 100644
--- a/mysql-test/r/merge.result
+++ b/mysql-test/r/merge.result
@@ -277,7 +277,7 @@ t3	CREATE TABLE `t3` (
 drop table t3,t2,t1;
 create table t1 (a int not null, key(a)) engine=merge;
 select * from t1;
-ERROR HY000: Got error 124 from storage engine
+a
 drop table t1;
 create table t1 (a int not null, b int not null, key(a,b));
 create table t2 (a int not null, b int not null, key(a,b));
@@ -988,6 +988,11 @@ m1	CREATE TABLE `m1` (
   `a` int(11) DEFAULT NULL
 ) ENGINE=MRG_MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t1, m1;
+CREATE TABLE t1(a INT, KEY(a)) ENGINE=merge;
+SELECT MAX(a) FROM t1;
+MAX(a)
+NULL
+DROP TABLE t1;
 CREATE TABLE t1(a INT);
 CREATE TABLE t2(a VARCHAR(10));
 CREATE TABLE m1(a INT) ENGINE=MERGE UNION=(t1, t2);
diff --git a/mysql-test/r/order_by.result b/mysql-test/r/order_by.result
index 6827fd0bc76..fa5d8142baf 100644
--- a/mysql-test/r/order_by.result
+++ b/mysql-test/r/order_by.result
@@ -1618,3 +1618,32 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	10	Using join buffer
 DROP TABLE t1, t2;
 End of 5.1 tests
+#
+# Bug #38745: MySQL 5.1 optimizer uses filesort for ORDER BY
+#             when it should use index
+#
+CREATE TABLE t1 (i1 integer NOT NULL PRIMARY KEY);
+CREATE TABLE t2 (i2 integer NOT NULL PRIMARY KEY);
+CREATE TABLE t3 (i3 integer);
+INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11), (12);
+INSERT INTO t2 SELECT * FROM t1;
+EXPLAIN EXTENDED
+SELECT t1.*, t2.* FROM t1 JOIN t2 ON t1.i1 = t2.i2 
+LEFT JOIN t3 ON t2.i2 = t3.i3
+ORDER BY t1.i1 LIMIT 5;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	0.00	const row not found
+1	SIMPLE	t1	index	PRIMARY	PRIMARY	4	NULL	5	240.00	Using index
+1	SIMPLE	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.i1	1	100.00	Using index
+Warnings:
+Note	1003	select `test`.`t1`.`i1` AS `i1`,`test`.`t2`.`i2` AS `i2` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`i2` = `test`.`t1`.`i1`) order by `test`.`t1`.`i1` limit 5
+SELECT t1.*, t2.* FROM t1 JOIN t2 ON t1.i1 = t2.i2 
+LEFT JOIN t3 ON t2.i2 = t3.i3
+ORDER BY t1.i1 LIMIT 5;
+i1	i2
+1	1
+2	2
+3	3
+4	4
+5	5
+DROP TABLE t1, t2, t3;
diff --git a/mysql-test/t/mdl_sync.test b/mysql-test/t/mdl_sync.test
index dff29d2f6b6..0b4b9af5bc6 100644
--- a/mysql-test/t/mdl_sync.test
+++ b/mysql-test/t/mdl_sync.test
@@ -3479,9 +3479,10 @@ SET DEBUG_SYNC= "get_schema_column SIGNAL waiting WAIT_FOR completed";
 
 connection default;
 SET DEBUG_SYNC= "now WAIT_FOR waiting";
+--replace_column 8 #
 SHOW FULL COLUMNS FROM t1;
 SET DEBUG_SYNC= "now SIGNAL completed";
-
+--replace_column 8 #
 connection con1;
 --reap
 connection default;
diff --git a/mysql-test/t/merge.test b/mysql-test/t/merge.test
index ab901185e43..a9d98da0403 100644
--- a/mysql-test/t/merge.test
+++ b/mysql-test/t/merge.test
@@ -126,7 +126,6 @@ drop table t3,t2,t1;
 # Test table without unions
 #
 create table t1 (a int not null, key(a)) engine=merge;
---error 1030
 select * from t1;
 drop table t1;
 
@@ -616,6 +615,14 @@ SHOW CREATE TABLE m1;
 DROP TABLE t1, m1;
 
 #
+# BUG#35274 - merge table doesn't need any base tables, gives error 124 when
+#             key accessed
+#
+CREATE TABLE t1(a INT, KEY(a)) ENGINE=merge;
+SELECT MAX(a) FROM t1;
+DROP TABLE t1;
+
+#
 # BUG#32047 - 'Spurious' errors while opening MERGE tables
 #
 CREATE TABLE t1(a INT);
diff --git a/mysql-test/t/order_by.test b/mysql-test/t/order_by.test
index 36b6015c5d8..2ea169d950d 100644
--- a/mysql-test/t/order_by.test
+++ b/mysql-test/t/order_by.test
@@ -1468,3 +1468,27 @@ SELECT * FROM t1 FORCE INDEX FOR JOIN (a), t2 WHERE t1.a < 2 ORDER BY t1.a;
 DROP TABLE t1, t2;
 
 --echo End of 5.1 tests
+
+
+--echo #
+--echo # Bug #38745: MySQL 5.1 optimizer uses filesort for ORDER BY
+--echo #             when it should use index
+--echo #
+
+CREATE TABLE t1 (i1 integer NOT NULL PRIMARY KEY);
+CREATE TABLE t2 (i2 integer NOT NULL PRIMARY KEY);
+CREATE TABLE t3 (i3 integer);
+
+INSERT INTO t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11), (12);
+INSERT INTO t2 SELECT * FROM t1;
+
+EXPLAIN EXTENDED
+SELECT t1.*, t2.* FROM t1 JOIN t2 ON t1.i1 = t2.i2 
+                     LEFT JOIN t3 ON t2.i2 = t3.i3
+  ORDER BY t1.i1 LIMIT 5;
+
+SELECT t1.*, t2.* FROM t1 JOIN t2 ON t1.i1 = t2.i2 
+                     LEFT JOIN t3 ON t2.i2 = t3.i3
+  ORDER BY t1.i1 LIMIT 5;
+
+DROP TABLE t1, t2, t3;
diff --git a/sql/field.cc b/sql/field.cc
index fcabaeaa74d..ee7d91c1fb6 100644
--- a/sql/field.cc
+++ b/sql/field.cc
@@ -9125,7 +9125,7 @@ void Create_field::create_length_to_internal_length(void)
 void Create_field::init_for_tmp_table(enum_field_types sql_type_arg,
                                       uint32 length_arg, uint32 decimals_arg,
                                       bool maybe_null, bool is_unsigned,
-                                      uint pack_length)
+                                      uint pack_length_arg)
 {
   DBUG_ENTER("Create_field::init_for_tmp_table");
 
@@ -9138,7 +9138,7 @@ void Create_field::init_for_tmp_table(enum_field_types sql_type_arg,
   geom_type= Field::GEOM_GEOMETRY;
 
   DBUG_PRINT("enter", ("sql_type: %d, length: %u, pack_length: %u",
-                       sql_type_arg, length_arg, pack_length));
+                       sql_type_arg, length_arg, pack_length_arg));
 
   /*
     These pack flags are crafted to get it correctly through the
@@ -9202,8 +9202,8 @@ void Create_field::init_for_tmp_table(enum_field_types sql_type_arg,
   case MYSQL_TYPE_GEOMETRY:
     // If you are going to use the above types, you have to pass a
     // pack_length as parameter. Assert that is really done.
-    DBUG_ASSERT(pack_length != ~0U);
-    pack_flag|= pack_length_to_packflag(pack_length);
+    DBUG_ASSERT(pack_length_arg != ~0U);
+    pack_flag|= pack_length_to_packflag(pack_length_arg);
     break;
   default:
     /* Nothing */
diff --git a/sql/item.cc b/sql/item.cc
index ff036a9fb54..c59a17a0ea3 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -1,4 +1,4 @@
-/* Copyright 2000-2008 MySQL AB, 2008 Sun Microsystems, Inc.
+/* Copyright (c) 2000, 2010 Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -3434,9 +3434,9 @@ Item_param::set_param_type_and_swap_value(Item_param *src)
 bool
 Item_param::set_value(THD *thd, sp_rcontext *ctx, Item **it)
 {
-  Item *value= *it;
+  Item *arg= *it;
 
-  if (value->is_null())
+  if (arg->is_null())
   {
     set_null();
     return FALSE;
@@ -3444,12 +3444,12 @@ Item_param::set_value(THD *thd, sp_rcontext *ctx, Item **it)
 
   null_value= FALSE;
 
-  switch (value->result_type()) {
+  switch (arg->result_type()) {
   case STRING_RESULT:
   {
     char str_buffer[STRING_BUFFER_USUAL_SIZE];
     String sv_buffer(str_buffer, sizeof(str_buffer), &my_charset_bin);
-    String *sv= value->val_str(&sv_buffer);
+    String *sv= arg->val_str(&sv_buffer);
 
     if (!sv)
       return TRUE;
@@ -3466,19 +3466,19 @@ Item_param::set_value(THD *thd, sp_rcontext *ctx, Item **it)
   }
 
   case REAL_RESULT:
-    set_double(value->val_real());
+    set_double(arg->val_real());
       param_type= MYSQL_TYPE_DOUBLE;
     break;
 
   case INT_RESULT:
-    set_int(value->val_int(), value->max_length);
+    set_int(arg->val_int(), arg->max_length);
     param_type= MYSQL_TYPE_LONG;
     break;
 
   case DECIMAL_RESULT:
   {
     my_decimal dv_buf;
-    my_decimal *dv= value->val_decimal(&dv_buf);
+    my_decimal *dv= arg->val_decimal(&dv_buf);
 
     if (!dv)
       return TRUE;
@@ -3498,8 +3498,8 @@ Item_param::set_value(THD *thd, sp_rcontext *ctx, Item **it)
     return FALSE;
   }
 
-  item_result_type= value->result_type();
-  item_type= value->type();
+  item_result_type= arg->result_type();
+  item_type= arg->type();
   return FALSE;
 }
 
diff --git a/sql/item.h b/sql/item.h
index 8360fa61498..e441a6ff261 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -1181,6 +1181,10 @@ public:
     collation.set(&my_charset_numeric, DERIVATION_NUMERIC, MY_REPERTOIRE_ASCII);
     fix_char_length(max_char_length_arg);
   }
+  /*
+    Return TRUE if the item points to a column of an outer-joined table.
+  */
+  virtual bool is_outer_field() const { DBUG_ASSERT(fixed); return FALSE; }
 };
 
 
@@ -1694,6 +1698,11 @@ public:
   int fix_outer_field(THD *thd, Field **field, Item **reference);
   virtual Item *update_value_transformer(uchar *select_arg);
   virtual void print(String *str, enum_query_type query_type);
+  bool is_outer_field() const
+  {
+    DBUG_ASSERT(fixed);
+    return field->table->pos_in_table_list->outer_join;
+  }
   Field::geometry_type get_geometry_type() const
   {
     DBUG_ASSERT(field_type() == MYSQL_TYPE_GEOMETRY);
@@ -2506,7 +2515,13 @@ public:
     DBUG_ASSERT(fixed);
     return (*ref)->get_time(ltime);
   }
-  bool basic_const_item() { return (*ref)->basic_const_item(); }
+  virtual bool basic_const_item() const { return (*ref)->basic_const_item(); }
+  bool is_outer_field() const
+  {
+    DBUG_ASSERT(fixed);
+    DBUG_ASSERT(ref);
+    return (*ref)->is_outer_field();
+  }
 
 };
 
@@ -3367,6 +3382,7 @@ public:
     cmp_context= STRING_RESULT;
   }
 
+  virtual void store(Item *item) { Item_cache::store(item); }
   void store(Item *item, longlong val_arg);
   double val_real();
   longlong val_int();
diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc
index 19e8385539f..3c871bc0663 100644
--- a/sql/item_cmpfunc.cc
+++ b/sql/item_cmpfunc.cc
@@ -5466,7 +5466,21 @@ void Item_equal::update_const()
   Item *item;
   while ((item= it++))
   {
-    if (item->const_item())
+    if (item->const_item() &&
+        /*
+          Don't propagate constant status of outer-joined column.
+          Such a constant status here is a result of:
+            a) empty outer-joined table: in this case such a column has a
+               value of NULL; but at the same time other arguments of
+               Item_equal don't have to be NULLs and the value of the whole
+               multiple equivalence expression doesn't have to be NULL or FALSE
+               because of the outer join nature;
+          or
+            b) outer-joined table contains only 1 row: the result of
+               this column is equal to a row field value *or* NULL.
+          Both values are inacceptable as Item_equal constants.
+        */
+        !item->is_outer_field())
     {
       it.remove();
       add(item);
@@ -5505,7 +5519,8 @@ void Item_equal::update_used_tables()
   {
     item->update_used_tables();
     used_tables_cache|= item->used_tables();
-    const_item_cache&= item->const_item();
+    /* see commentary at Item_equal::update_const() */
+    const_item_cache&= item->const_item() && !item->is_outer_field();
   }
 }
 
diff --git a/sql/item_sum.h b/sql/item_sum.h
index 5f2c4f166e6..c76f3102003 100644
--- a/sql/item_sum.h
+++ b/sql/item_sum.h
@@ -303,6 +303,8 @@ class st_select_lex;
 
 class Item_sum :public Item_result_field
 {
+  friend class Aggregator_distinct;
+
 protected:
   /**
     Aggregator class instance. Not set initially. Allocated only after
diff --git a/sql/partition_info.cc b/sql/partition_info.cc
index 7be10ecde2c..a689d53d953 100644
--- a/sql/partition_info.cc
+++ b/sql/partition_info.cc
@@ -1,4 +1,4 @@
-/* Copyright (C) 2006-2008 MySQL AB, Sun Microsystems Inc. 2008-2009
+/* Copyright (c) 2006, 2010 Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -603,12 +603,12 @@ bool partition_info::check_engine_mix(handlerton *engine_type,
 {
   handlerton *old_engine_type= engine_type;
   bool first= TRUE;
-  uint num_parts= partitions.elements;
+  uint n_parts= partitions.elements;
   DBUG_ENTER("partition_info::check_engine_mix");
   DBUG_PRINT("info", ("in: engine_type = %s, table_engine_set = %u",
                        ha_resolve_storage_engine_name(engine_type),
                        table_engine_set));
-  if (num_parts)
+  if (n_parts)
   {
     List_iterator<partition_element> part_it(partitions);
     uint i= 0;
@@ -621,7 +621,7 @@ bool partition_info::check_engine_mix(handlerton *engine_type,
       if (is_sub_partitioned() &&
           part_elem->subpartitions.elements)
       {
-        uint num_subparts= part_elem->subpartitions.elements;
+        uint n_subparts= part_elem->subpartitions.elements;
         uint j= 0;
         List_iterator<partition_element> sub_it(part_elem->subpartitions);
         do
@@ -633,7 +633,7 @@ bool partition_info::check_engine_mix(handlerton *engine_type,
           if (check_engine_condition(sub_elem, table_engine_set,
                                      &engine_type, &first))
             goto error;
-        } while (++j < num_subparts);
+        } while (++j < n_subparts);
         /* ensure that the partition also has correct engine */
         if (check_engine_condition(part_elem, table_engine_set,
                                    &engine_type, &first))
@@ -642,7 +642,7 @@ bool partition_info::check_engine_mix(handlerton *engine_type,
       else if (check_engine_condition(part_elem, table_engine_set,
                                       &engine_type, &first))
         goto error;
-    } while (++i < num_parts);
+    } while (++i < n_parts);
   }
   DBUG_PRINT("info", ("engine_type = %s",
                        ha_resolve_storage_engine_name(engine_type)));
@@ -1315,15 +1315,15 @@ end:
   RETURN VALUES
 */
 
-void partition_info::print_no_partition_found(TABLE *table)
+void partition_info::print_no_partition_found(TABLE *table_arg)
 {
   char buf[100];
   char *buf_ptr= (char*)&buf;
   TABLE_LIST table_list;
 
   bzero(&table_list, sizeof(table_list));
-  table_list.db= table->s->db.str;
-  table_list.table_name= table->s->table_name.str;
+  table_list.db= table_arg->s->db.str;
+  table_list.table_name= table_arg->s->table_name.str;
 
   if (check_single_table_access(current_thd,
                                 SELECT_ACL, &table_list, TRUE))
@@ -1337,13 +1337,13 @@ void partition_info::print_no_partition_found(TABLE *table)
       buf_ptr= (char*)"from column_list";
     else
     {
-      my_bitmap_map *old_map= dbug_tmp_use_all_columns(table, table->read_set);
+      my_bitmap_map *old_map= dbug_tmp_use_all_columns(table_arg, table_arg->read_set);
       if (part_expr->null_value)
         buf_ptr= (char*)"NULL";
       else
         longlong2str(err_value, buf,
                      part_expr->unsigned_flag ? 10 : -10);
-      dbug_tmp_restore_column_map(table->read_set, old_map);
+      dbug_tmp_restore_column_map(table_arg->read_set, old_map);
     }
     my_error(ER_NO_PARTITION_FOR_GIVEN_VALUE, MYF(0), buf_ptr);
   }
@@ -2003,7 +2003,7 @@ bool partition_info::fix_column_value_functions(THD *thd,
                                                 part_elem_value *val,
                                                 uint part_id)
 {
-  uint num_columns= part_field_list.elements;
+  uint n_columns= part_field_list.elements;
   bool result= FALSE;
   uint i;
   part_column_list_val *col_val= val->col_val_array;
@@ -2013,7 +2013,7 @@ bool partition_info::fix_column_value_functions(THD *thd,
   {
     DBUG_RETURN(FALSE);
   }
-  for (i= 0; i < num_columns; col_val++, i++)
+  for (i= 0; i < n_columns; col_val++, i++)
   {
     Item *column_item= col_val->item_expression;
     Field *field= part_field_array[i];
diff --git a/sql/sql_load.cc b/sql/sql_load.cc
index 6054bb0ac23..2c42f29ae71 100644
--- a/sql/sql_load.cc
+++ b/sql/sql_load.cc
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000-2006 MySQL AB, 2008-2009 Sun Microsystems, Inc
+/* Copyright (c) 2000, 2010 Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -1708,7 +1708,7 @@ bool READ_INFO::find_start_of_fields()
 /*
   Clear taglist from tags with a specified level
 */
-int READ_INFO::clear_level(int level)
+int READ_INFO::clear_level(int level_arg)
 {
   DBUG_ENTER("READ_INFO::read_xml clear_level");
   List_iterator<XML_TAG> xmlit(taglist);
@@ -1717,7 +1717,7 @@ int READ_INFO::clear_level(int level)
   
   while ((tag= xmlit++))
   {
-     if(tag->level >= level)
+     if(tag->level >= level_arg)
      {
        xmlit.remove();
        delete tag;
diff --git a/storage/myisammrg/myrg_queue.c b/storage/myisammrg/myrg_queue.c
index d2579053784..2c447083558 100644
--- a/storage/myisammrg/myrg_queue.c
+++ b/storage/myisammrg/myrg_queue.c
@@ -65,7 +65,17 @@ int _myrg_init_queue(MYRG_INFO *info,int inx,enum ha_rkey_function search_flag)
     }
   }
   else
-    my_errno= error= HA_ERR_WRONG_INDEX;
+  {
+    /*
+      inx may be bigger than info->keys if there are no underlying tables
+      defined. In this case we should return empty result. As we check for
+      underlying tables conformance when we open a table, we may not enter
+      this branch with underlying table that has less keys than merge table
+      have.
+    */
+    DBUG_ASSERT(!info->tables);
+    error= my_errno= HA_ERR_END_OF_FILE;
+  }
   return error;
 }