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CTE doesn't handle apply properly #31255

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guo-shaoge opened this issue Jan 3, 2022 · 2 comments · Fixed by #31256
Closed

CTE doesn't handle apply properly #31255

guo-shaoge opened this issue Jan 3, 2022 · 2 comments · Fixed by #31256
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affects-5.1 This bug affects 5.1.x versions. affects-5.2 This bug affects 5.2.x versions. affects-5.3 This bug affects 5.3.x versions. affects-5.4 This bug affects 5.4.x versions. severity/major type/bug This issue is a bug.

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@guo-shaoge
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Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

drop table if exists t1, t2;
create table t1(c1 int, c2 int);
insert into t1 values(2, 1);
insert into t1 values(2, 2);
create table t2(c1 int, c2 int);
insert into t2 values(1, 1);
insert into t2 values(3, 2);
select * from t1 where c1 > all(with cte1 as (select c1 from t2 where t2.c2 = t1.c2) select c1 from cte1);

2. What did you expect to see? (Required)

mysql>     select * from t1 where c1 > all(with cte1 as (select c1 from t2 where t2.c2 = t1.c2) select c1 from cte1);
+------+------+
| c1   | c2   |
+------+------+
|    2 |    1 |
+------+------+

3. What did you see instead (Required)

mysql>     select * from t1 where c1 > all(with cte1 as (select c1 from t2 where t2.c2 = t1.c2) select c1 from cte1);
+------+------+
| c1   | c2   |
+------+------+
|    2 |    1 |
|    2 |    2 |
+------+------+
2 rows in set (0.00 sec)

4. What is your TiDB version? (Required)

master

@guo-shaoge guo-shaoge added the type/bug This issue is a bug. label Jan 3, 2022
@guo-shaoge guo-shaoge added affects-5.4 This bug affects 5.4.x versions. affects-5.1 This bug affects 5.1.x versions. affects-5.2 This bug affects 5.2.x versions. affects-5.3 This bug affects 5.3.x versions. labels Jan 3, 2022
@guo-shaoge guo-shaoge self-assigned this Jan 3, 2022
@wjhuang2016
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It's a corner case and only happens when CTE is on the inner side.

@github-actions
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github-actions bot commented Jan 6, 2022

Please check whether the issue should be labeled with 'affects-x.y' or 'fixes-x.y.z', and then remove 'needs-more-info' label.

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Labels
affects-5.1 This bug affects 5.1.x versions. affects-5.2 This bug affects 5.2.x versions. affects-5.3 This bug affects 5.3.x versions. affects-5.4 This bug affects 5.4.x versions. severity/major type/bug This issue is a bug.
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2 participants