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Fixed bug #27348.

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If a set function with a outer reference s(outer_ref) cannot be aggregated 
the outer query against which the reference has been resolved then MySQL
interpretes s(outer_ref) in the same way as it would interpret s(const).
Hovever the standard requires throwing an error in this situation.
Added some code to support this requirement in ansi mode.
Corrected another minor bug in Item_sum::check_sum_func.
 


mysql-test/r/subselect.result:
  Added a test case for bug #27348.
mysql-test/t/subselect.test:
  Added a test case for bug #27348.
sql/item_sum.cc:
  Fixed bug #27348.
  If a set function with a outer reference s(outer_ref) cannot be aggregated 
  the outer query against which the reference has been resolved then MySQL
  interprets s(outer_ref) in the same way as it would interpret s(const).
  Hovever the standard requires throwing an error in this situation.
  Added some code to support this requirement in ansi mode.
  Corrected another minor bug in Item_sum::check_sum_func.
This commit is contained in:
unknown 2007-03-27 09:48:10 -07:00
parent 6e93d2939d
commit ec3de56263
3 changed files with 55 additions and 2 deletions
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23
mysql-test/r/subselect.result
View File

@ -3924,3 +3924,26 @@ c a (SELECT GROUP_CONCAT(COUNT(a)+1) FROM t2 WHERE m = a)
3 3 4
1 4 2,2
DROP table t1,t2;
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (2,22),(1,11),(2,22);
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
a
1
2
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
a
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
a
1
2
SET @@sql_mode='ansi';
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
ERROR HY000: Invalid use of group function
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
ERROR HY000: Invalid use of group function
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
ERROR HY000: Invalid use of group function
SET @@sql_mode=default;
DROP TABLE t1;

27
mysql-test/t/subselect.test
View File

@ -2782,3 +2782,30 @@ SELECT COUNT(*) c, a,
FROM t1 GROUP BY a;
DROP table t1,t2;
#
# Bug #27348: SET FUNCTION used in a subquery from WHERE condition
#
CREATE TABLE t1 (a int, b int);
INSERT INTO t1 VALUES (2,22),(1,11),(2,22);
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
SET @@sql_mode='ansi';
--error 1111
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 0 GROUP BY a;
--error 1111
SELECT a FROM t1 WHERE (SELECT COUNT(b) FROM DUAL) > 1 GROUP BY a;
--error 1111
SELECT a FROM t1 t0
WHERE (SELECT COUNT(t0.b) FROM t1 t WHERE t.b>20) GROUP BY a;
SET @@sql_mode=default;
DROP TABLE t1;

7
sql/item_sum.cc
View File

@ -149,6 +149,8 @@ bool Item_sum::check_sum_func(THD *thd, Item **ref)
if (register_sum_func(thd, ref))
return TRUE;
invalid= aggr_level < 0 && !(allow_sum_func & (1 << nest_level));
if (!invalid && thd->variables.sql_mode & MODE_ANSI)
invalid= aggr_level < 0 && max_arg_level < nest_level;
}
if (!invalid && aggr_level < 0)
{
@ -164,8 +166,9 @@ bool Item_sum::check_sum_func(THD *thd, Item **ref)
Additionally we have to check whether possible nested set functions
are acceptable here: they are not, if the level of aggregation of
some of them is less than aggr_level.
*/
invalid= aggr_level <= max_sum_func_level;
*/
if (!invalid)
invalid= aggr_level <= max_sum_func_level;
if (invalid)
{
my_message(ER_INVALID_GROUP_FUNC_USE, ER(ER_INVALID_GROUP_FUNC_USE),