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Fixed LP bug #793386.

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Auto-generated names for view field items must be allocated in
the statement memory, not in the execution memory of the statement.
This commit is contained in:
Igor Babaev 2011-07-11 10:56:48 -07:00
parent f8db35bd15
commit 47aee19827
3 changed files with 45 additions and 0 deletions
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18
mysql-test/r/view.result
View file

@ -4277,3 +4277,21 @@ Warnings:
Note 1003 select `v2`.`b` AS `b` from `test`.`v2` where 0
DROP VIEW v1,v2;
DROP TABLE t1;
#
# LP bug #793386: unexpected 'Duplicate column name ''' error
# at the second execution of a PS using a view
#
CREATE TABLE t1 (f1 int, f2 int, f3 int, f4 int);
CREATE VIEW v1 AS
SELECT t.f1, t.f2, s.f3, s.f4 FROM t1 t, t1 s
WHERE t.f4 >= s.f2 AND s.f3 < 0;
PREPARE stmt1 FROM
"SELECT s.f1 AS f1, s.f2 AS f2, s.f3 AS f3, t.f4 AS f4
FROM v1 AS t LEFT JOIN v1 AS s ON t.f4=s.f4 WHERE t.f2 <> 1225";
EXECUTE stmt1;
f1 f2 f3 f4
EXECUTE stmt1;
f1 f2 f3 f4
DEALLOCATE PREPARE stmt1;
DROP VIEW v1;
DROP TABLE t1;

22
mysql-test/t/view.test
View file

@ -4213,3 +4213,25 @@ SELECT * FROM (SELECT b FROM v2 WHERE b = 0) t WHERE b;
DROP VIEW v1,v2;
DROP TABLE t1;
--echo #
--echo # LP bug #793386: unexpected 'Duplicate column name ''' error
--echo # at the second execution of a PS using a view
--echo #
CREATE TABLE t1 (f1 int, f2 int, f3 int, f4 int);
CREATE VIEW v1 AS
SELECT t.f1, t.f2, s.f3, s.f4 FROM t1 t, t1 s
WHERE t.f4 >= s.f2 AND s.f3 < 0;
PREPARE stmt1 FROM
"SELECT s.f1 AS f1, s.f2 AS f2, s.f3 AS f3, t.f4 AS f4
FROM v1 AS t LEFT JOIN v1 AS s ON t.f4=s.f4 WHERE t.f2 <> 1225";
EXECUTE stmt1;
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
DROP VIEW v1;
DROP TABLE t1;

5
sql/sql_base.cc
View file

@ -5861,10 +5861,15 @@ find_field_in_view(THD *thd, TABLE_LIST *table_list,
*/
if (*ref && !(*ref)->is_autogenerated_name)
{
if (register_tree_change &&
thd->stmt_arena->is_stmt_prepare_or_first_stmt_execute())
arena= thd->activate_stmt_arena_if_needed(&backup);
item->set_name((*ref)->name, (*ref)->name_length,
system_charset_info);
item->real_item()->set_name((*ref)->name, (*ref)->name_length,
system_charset_info);
if (arena)
thd->restore_active_arena(arena, &backup);
}
if (register_tree_change)
thd->change_item_tree(ref, item);