planner: fix the fail when we compare multi fields in the subquery (#21699)

[ti-srebot]

cherry-pick #21699 to release-4.0

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What problem does this PR solve?

Issue Number: close #13551 close #21674

Problem Summary:
When we use (SELECT c1, c2 FROM t2 LIMIT 1) = ANY (SELECT c1, c2 FROM t1) in the where statement, the expressionRewrite.ctxStack will store the result value of SELECT c1, c2 FROM t2 LIMIT 1. So in issue#21674, when the value of c1 is zero, the plan will be convert to tableDual.

What is changed and how it works?

So, we should set expressionRewrite.asScalar = true like handleInSubquery function. It will use the parent expression's last column from the schema to represents whether the condition is matched(https://github.com/pingcap/tidb/blob/master/planner/core/expression_rewriter.go#L558-L561).

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• Need to cherry-pick to the release branch

Check List

Tests

• Unit test
• Integration test

Release note

• fix the fail when we compare multi fields in the subquery

[ti-srebot]

/run-all-tests

[ti-srebot]

@Reminiscent you're already a collaborator in bot's repo.

[Reminiscent]

/run-all-tests

[qw4990]

LGTM

[qw4990]

PTAL @XuHuaiyu @lzmhhh123

[lzmhhh123]

LGTM