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Fix of LP BUG#675248.

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Registration of pointer change if we assign it to other pointer which should be identical after statement execution (PS/SP).

mysql-test/r/subselect.result:
  Test suite.
mysql-test/t/subselect.test:
  Test suite.
sql/sql_class.cc:
  The procedure of the pointer registration.
sql/sql_class.h:
  The procedure of the pointer registration.
sql/sql_lex.cc:
  Registration of pointer change if we assign it to other pointer which should be identical after statement execution (PS/SP).
This commit is contained in:
unknown
2010-11-23 20:43:34 +02:00
parent 7840965db9
commit 34c8930c09
5 changed files with 95 additions and 4 deletions
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20
sql/sql_class.h
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@@ -1568,7 +1568,7 @@ public:
/*
This is to track items changed during execution of a prepared
statement/stored procedure. It's created by
register_item_tree_change() in memory root of THD, and freed in
nocheck_register_item_tree_change() in memory root of THD, and freed in
rollback_item_tree_changes(). For conventional execution it's always
empty.
*/
@@ -2175,8 +2175,26 @@ public:
nocheck_register_item_tree_change(place, *place, mem_root);
*place= new_value;
}
/**
Make change in item tree after checking whether it needs registering
@param place place where we should assign new value
@param new_value place of the new value
@details
see check_and_register_item_tree_change details
*/
void check_and_register_item_tree(Item **place, Item **new_value)
{
if (!stmt_arena->is_conventional())
check_and_register_item_tree_change(place, new_value, mem_root);
*place= *new_value;
}
void nocheck_register_item_tree_change(Item **place, Item *old_value,
MEM_ROOT *runtime_memroot);
void check_and_register_item_tree_change(Item **place, Item **new_value,
MEM_ROOT *runtime_memroot);
void rollback_item_tree_changes();
/*