TiDB throw error when explain a complex sql

[windtalker]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

mysql> show create table bb;
+-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
+-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| BB    | CREATE TABLE `BB` (
  `col_int` int(11) DEFAULT NULL,
  `col_varchar_10` varchar(10) DEFAULT NULL,
  `pk` int(11) NOT NULL AUTO_INCREMENT,
  `col_int_not_null` int(11) NOT NULL,
  `col_decimal` decimal(10,0) DEFAULT NULL,
  `col_datetime` datetime DEFAULT NULL,
  `col_decimal_not_null` decimal(10,0) NOT NULL,
  `col_datetime_not_null` datetime NOT NULL,
  `col_varchar_10_not_null` varchar(10) NOT NULL,
  PRIMARY KEY (`pk`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin AUTO_INCREMENT=2000001 |
+-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> explain SELECT OUTR . col2 AS X FROM (SELECT INNR . col1 as col1, SUM( INNR . col2 ) as col2 FROM (SELECT INNR . `col_int_not_null` + 1 as col1, INNR . `pk` as col2 FROM BB AS INNR) AS INNR GROUP BY col1) AS OUTR2 INNER JOIN (SELECT INNR . col1 as col1, MAX( INNR . col2 ) as col2 FROM (SELECT INNR . `col_int_not_null` + 1 as col1, INNR . `pk` as col2 FROM BB AS INNR) AS INNR GROUP BY col1) AS OUTR ON OUTR2.col1 = OUTR.col1 GROUP BY OUTR . col1, OUTR2 . col1 HAVING X <> 'b';
ERROR 1105 (HY000): runtime error: index out of range [-1]

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

the query plan

3. What did you see instead (Required)

runtime error

4. What is your TiDB version? (Required)

mysql> select tidb_version();
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| tidb_version()                                                                                                                                                                                                                                                                                                            |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Release Version: v4.0.0-beta.2-2548-ge2a296144
Edition: Community
Git Commit Hash: e2a296144097273d97f31001cbfbdafde975769e
Git Branch: master
UTC Build Time: 2021-04-01 17:02:46
GoVersion: go1.13
Race Enabled: false
TiKV Min Version: v3.0.0-60965b006877ca7234adaced7890d7b029ed1306
Check Table Before Drop: false |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

[xuyifangreeneyes]

/assign

[xuyifangreeneyes]

a simplified case:

mysql> CREATE TABLE `BB` (
    ->   `pk` int(11) NOT NULL AUTO_INCREMENT,
    ->   `col_int_not_null` int NOT NULL,
    ->   PRIMARY KEY (`pk`)
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql> EXPLAIN
    -> SELECT OUTR . col2 AS X
    -> FROM
    ->   BB AS OUTR2
    -> INNER JOIN
    ->   (SELECT col_int_not_null AS col1,
    ->           pk AS col2
    ->    FROM BB) AS OUTR ON OUTR2.col_int_not_null = OUTR.col1
    -> GROUP BY OUTR2.col_int_not_null;
ERROR 1105 (HY000): runtime error: index out of range [-1]

[ti-srebot]

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