CTE is blocked when got error in Projection

[guo-shaoge]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

go run t.go . Create table and insert rows.

with recursive cte(iter, first, second, result) as (select 1, first, second, first+second from src  union all  select iter+1, second, result, second+result from cte where iter < 80 ) select * from cte;

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

mysql> with recursive cte(iter, first, second, result) as (select 1, first, second, first+second from src  union all  select iter+1, second, result, second+result from cte where iter < 80 ) select * from cte;
ERROR 1690 (22003): BIGINT value is out of range in '(src.src.second + Column#14)'

3. What did you see instead (Required)

blocked

4. What is your TiDB version? (Required)

+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| tidb_version()
                                      |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Release Version: v5.5.0-alpha-22-g68642193b9-dirty
Edition: Community
Git Commit Hash: 68642193b9d1105a2521009986efa10c9e85f1b7
Git Branch: fix_cte_apply
UTC Build Time: 2022-01-04 14:26:18
GoVersion: go1.16.4
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false |
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

[guo-shaoge]

We can set tidb_projection_concurrency to 1 to avoid this problem.