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fix for bug #12651 (item of a prepared query allocated on non-permanent

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are thus dangling later)
This commit is contained in:
andrey@lmy004.
2005-09-08 21:30:05 +02:00
parent b5583947df
commit 1a46ea1057
3 changed files with 40 additions and 0 deletions
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17
sql/sql_base.cc
View File

@ -2612,6 +2612,8 @@ find_field_in_view(THD *thd, TABLE_LIST *table_list,
table_list->alias, name, item_name, (ulong) ref));
Field_iterator_view field_it;
field_it.set(table_list);
Query_arena *arena, backup;
DBUG_ASSERT(table_list->schema_table_reformed ||
(ref != 0 && table_list->view != 0));
for (; !field_it.end_of_fields(); field_it.next())
@ -2633,7 +2635,13 @@ find_field_in_view(THD *thd, TABLE_LIST *table_list,
name, length))
DBUG_RETURN(WRONG_GRANT);
#endif
// in PS use own arena or data will be freed after prepare
if (register_tree_change)
arena= thd->activate_stmt_arena_if_needed(&backup);
Item *item= field_it.create_item(thd);
if (register_tree_change && arena)
thd->restore_active_arena(arena, &backup);
if (!item)
DBUG_RETURN(0);
/*
@ -2695,6 +2703,8 @@ find_field_in_natural_join(THD *thd, TABLE_LIST *table_ref, const char *name,
field_it(*(table_ref->join_columns));
Natural_join_column *nj_col;
Field *found_field;
Query_arena *arena, backup;
DBUG_ENTER("find_field_in_natural_join");
DBUG_PRINT("enter", ("field name: '%s', ref 0x%lx",
name, (ulong) ref));
@ -2723,7 +2733,14 @@ find_field_in_natural_join(THD *thd, TABLE_LIST *table_ref, const char *name,
The found field is a view field, we do as in find_field_in_view()
and return a pointer to pointer to the Item of that field.
*/
if (register_tree_change)
arena= thd->activate_stmt_arena_if_needed(&backup);
Item *item= nj_col->create_item(thd);
if (register_tree_change && arena)
thd->restore_active_arena(arena, &backup);
if (!item)
DBUG_RETURN(NULL);
DBUG_ASSERT(nj_col->table_field == NULL);