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Bug#31797: error while parsing subqueries -- WHERE is parsed as HAVING

Browse Source 
The name resolution for correlated subqueries and HAVING clauses
failed to distinguish which of two was being performed when there 
was a reference to an outer aliased field.
Fixed by adding the condition that HAVING clause name resulotion
is being performed.


mysql-test/r/group_by.result:
  Bug#31797: Test result
mysql-test/t/group_by.test:
  Bug#31797: Test case
sql/item.cc:
  Bug#31797: 
  Corrected function comment.
  The fix, raising the error is restricted to HAVING name resolution.
This commit is contained in:
unknown
2008-01-11 18:50:54 +01:00
parent 62a7e160bc
commit df8e9fc234
3 changed files with 86 additions and 1 deletions
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36
mysql-test/r/group_by.result
View File

@ -1113,3 +1113,39 @@ c b
3 1
3 2
DROP TABLE t1;
CREATE TABLE t1 ( a INT, b INT );
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1;
c (SELECT a FROM t1 WHERE b = c)
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1
HAVING b = 10;
c (SELECT a FROM t1 WHERE b = c)
SELECT MAX(b) c, (SELECT a FROM t1 WHERE b = c)
FROM t1
HAVING b = 10;
ERROR 42S22: Reference 'c' not supported (reference to group function)
SET @old_sql_mode = @@sql_mode;
SET @@sql_mode='ONLY_FULL_GROUP_BY';
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1;
c (SELECT a FROM t1 WHERE b = c)
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1
HAVING b = 10;
ERROR 42000: non-grouping field 'b' is used in HAVING clause
SELECT MAX(b) c, (SELECT a FROM t1 WHERE b = c)
FROM t1
HAVING b = 10;
ERROR 42S22: Reference 'c' not supported (reference to group function)
INSERT INTO t1 VALUES (1, 1);
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1;
c (SELECT a FROM t1 WHERE b = c)
1 1
INSERT INTO t1 VALUES (2, 1);
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1;
ERROR 21000: Subquery returns more than 1 row
DROP TABLE t1;
SET @@sql_mode = @old_sql_mode;

48
mysql-test/t/group_by.test
View File

@ -815,3 +815,51 @@ EXPLAIN SELECT c,b FROM t1 GROUP BY c,b;
SELECT c,b FROM t1 GROUP BY c,b;
DROP TABLE t1;
#
# Bug #31797: error while parsing subqueries -- WHERE is parsed as HAVING
#
CREATE TABLE t1 ( a INT, b INT );
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1;
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1
HAVING b = 10;
--error ER_ILLEGAL_REFERENCE
SELECT MAX(b) c, (SELECT a FROM t1 WHERE b = c)
FROM t1
HAVING b = 10;
SET @old_sql_mode = @@sql_mode;
SET @@sql_mode='ONLY_FULL_GROUP_BY';
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1;
--error ER_NON_GROUPING_FIELD_USED
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1
HAVING b = 10;
--error ER_ILLEGAL_REFERENCE
SELECT MAX(b) c, (SELECT a FROM t1 WHERE b = c)
FROM t1
HAVING b = 10;
INSERT INTO t1 VALUES (1, 1);
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1;
INSERT INTO t1 VALUES (2, 1);
--error ER_SUBQUERY_NO_1_ROW
SELECT b c, (SELECT a FROM t1 WHERE b = c)
FROM t1;
DROP TABLE t1;
SET @@sql_mode = @old_sql_mode;

3
sql/item.cc
View File

@ -3352,7 +3352,7 @@ static Item** find_field_in_group_list(Item *find_item, ORDER *group_list)
resolve_ref_in_select_and_group()
thd current thread
ref column reference being resolved
select the sub-select that ref is resolved against
select the select that ref is resolved against
DESCRIPTION
Resolve a column reference (usually inside a HAVING clause) against the
@ -3423,6 +3423,7 @@ resolve_ref_in_select_and_group(THD *thd, Item_ident *ref, SELECT_LEX *select)
}
if (thd->variables.sql_mode & MODE_ONLY_FULL_GROUP_BY &&
select->having_fix_field &&
select_ref != not_found_item && !group_by_ref)
{
/*