planner: check readEngines when building plan for index hint (#15723)

[sre-bot]

cherry-pick #15723 to release-3.1

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What problem does this PR solve?

Issue Number: close #15494

Problem Summary: set @@session.tidb_isolation_read_engines='tiflash'; and use index can't get correct error information.

What is changed and how it works?

What's Changed: Check ReadEngines whether has TiKV when building an indexScan.

How it Works:

Related changes

• Need to cherry-pick to the release branch 4.0

Check List

Tests

• Manual test (add detailed scripts or steps below)

mysql> drop table t;
Query OK, 0 rows affected (0.19 sec)

mysql> create table t(a int, index idx(a));
Query OK, 0 rows affected (0.07 sec)

mysql> ALTER TABLE t SET TIFLASH REPLICA 1;
Query OK, 0 rows affected (0.07 sec)

mysql> set @@session.tidb_isolation_read_engines='tiflash';
Query OK, 0 rows affected (0.00 sec)

mysql> select * from t use index(idx);
ERROR 1176 (42000): Key 'idx' doesn't exist in table 't'
mysql> select /*+ use_index(t, idx)*/ * from t;
Empty set, 1 warning (0.01 sec)

mysql> show warnings;
+---------+------+--------------------------------------+
| Level   | Code | Message                              |
+---------+------+--------------------------------------+
| Warning | 1176 | Key 'idx' doesn't exist in table 't' |
+---------+------+--------------------------------------+
1 row in set (0.00 sec)

mysql> desc select /*+ use_index(t, idx)*/ * from t;
+-----------------------+----------+--------------+-----------------------------------------+
| id                    | estRows  | task         | operator info                           |
+-----------------------+----------+--------------+-----------------------------------------+
| TableReader_5         | 10000.00 | root         | data:TableFullScan_4                    |
| └─TableFullScan_4     | 10000.00 | cop[tiflash] | table:t, keep order:false, stats:pseudo |
+-----------------------+----------+--------------+-----------------------------------------+
2 rows in set, 1 warning (0.00 sec)

Side effects

Release note

[sre-bot]

/run-all-tests

[lzmhhh123]

LGTM

[zz-jason]

LGTM

[sre-bot]

Your auto merge job has been accepted, waiting for 15678

[sre-bot]

/run-all-tests