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Backport 5.5=>5.1 Patch for Bug#13805127:

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Stored program cache produces wrong result in same THD.
This commit is contained in:
Tor Didriksen
2012-04-18 13:14:05 +02:00
parent a9a7e6ea24
commit d612986b36
8 changed files with 487 additions and 2 deletions
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16
sql/sql_lex.h
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@ -40,6 +40,7 @@ class Event_parse_data;
*/
#include "set_var.h"
#include "mem_root_array.h"
#ifdef MYSQL_YACC
#define LEX_YYSTYPE void *
@ -183,6 +184,7 @@ enum enum_drop_mode
};
typedef List<Item> List_item;
typedef Mem_root_array<ORDER*, true> Group_list_ptrs;
/* SERVERS CACHE CHANGES */
typedef struct st_lex_server_options
@ -590,7 +592,16 @@ public:
enum olap_type olap;
/* FROM clause - points to the beginning of the TABLE_LIST::next_local list. */
SQL_I_List<TABLE_LIST> table_list;
SQL_I_List<ORDER> group_list; /* GROUP BY clause. */
/*
GROUP BY clause.
This list may be mutated during optimization (by remove_const()),
so for prepared statements, we keep a copy of the ORDER.next pointers in
group_list_ptrs, and re-establish the original list before each execution.
*/
SQL_I_List<ORDER> group_list;
Group_list_ptrs *group_list_ptrs;
List<Item> item_list; /* list of fields & expressions */
List<String> interval_list;
bool is_item_list_lookup;
@ -779,7 +790,8 @@ public:
bool test_limit();
friend void lex_start(THD *thd);
st_select_lex() : n_sum_items(0), n_child_sum_items(0) {}
st_select_lex() : group_list_ptrs(NULL), n_sum_items(0), n_child_sum_items(0)
{}
void make_empty_select()
{
init_query();