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Bug #31794: no syntax error on SELECT id FROM t HAVING count(*)>2

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The HAVING clause is subject to the same rules as the SELECT list
about using aggregated and non-aggregated columns.
But this was not enforced when processing implicit grouping from
using aggregate functions.
Fixed by performing the same checks for HAVING as for SELECT.
This commit is contained in:
gkodinov/kgeorge@magare.gmz
2007-11-01 18:36:24 +02:00
parent f370e4b3d4
commit 92a5605d43
3 changed files with 44 additions and 2 deletions
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15
mysql-test/r/func_group.result
View File

@ -1392,4 +1392,19 @@ SELECT MIN(b) FROM t1 WHERE a=1 AND b>'2007-08-01';
MIN(b)
NULL
DROP TABLE t1;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2),(3),(4);
SET SQL_MODE=ONLY_FULL_GROUP_BY;
SELECT a FROM t1 HAVING COUNT(*)>2;
ERROR 42000: Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause
SELECT COUNT(*), a FROM t1;
ERROR 42000: Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause
SET SQL_MODE=DEFAULT;
SELECT a FROM t1 HAVING COUNT(*)>2;
a
1
SELECT COUNT(*), a FROM t1;
COUNT(*) a
4 1
DROP TABLE t1;
End of 5.0 tests

19
mysql-test/t/func_group.test
View File

@ -882,5 +882,24 @@ CREATE TABLE t1 (a int, b date NOT NULL, KEY k1 (a,b));
SELECT MIN(b) FROM t1 WHERE a=1 AND b>'2007-08-01';
DROP TABLE t1;
#
# Bug #31794: no syntax error on SELECT id FROM t HAVING count(*)>2;
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2),(3),(4);
SET SQL_MODE=ONLY_FULL_GROUP_BY;
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
SELECT a FROM t1 HAVING COUNT(*)>2;
--error ER_MIX_OF_GROUP_FUNC_AND_FIELDS
SELECT COUNT(*), a FROM t1;
SET SQL_MODE=DEFAULT;
SELECT a FROM t1 HAVING COUNT(*)>2;
SELECT COUNT(*), a FROM t1;
DROP TABLE t1;
###
--echo End of 5.0 tests

12
sql/sql_select.cc
View File

@ -565,11 +565,12 @@ JOIN::prepare(Item ***rref_pointer_array,
/*
Check if one one uses a not constant column with group functions
and no GROUP BY.
Check if there are references to un-aggregated columns when computing
aggregate functions with implicit grouping (there is no GROUP BY).
TODO: Add check of calculation of GROUP functions and fields:
SELECT COUNT(*)+table.col1 from table1;
*/
if (thd->variables.sql_mode & MODE_ONLY_FULL_GROUP_BY)
{
if (!group_list)
{
@ -583,6 +584,13 @@ JOIN::prepare(Item ***rref_pointer_array,
else if (!(flag & 2) && !item->const_during_execution())
flag|=2;
}
if (having)
{
if (having->with_sum_func)
flag |= 1;
else if (!having->const_during_execution())
flag |= 2;
}
if (flag == 3)
{
my_message(ER_MIX_OF_GROUP_FUNC_AND_FIELDS,