planner: don't push down topN when the expressions in projection is mutable effective

[Reminiscent]

…utable effective

What problem does this PR solve?

Issue Number: close #37986

Problem Summary:
planner: don't push down topN when the expressions in projection is mutable effective

What is changed and how it works?

planner: don't push down topN when the expressions in projection is mutable effective

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• chrysan
• qw4990

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[qw4990]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 8542943

[Reminiscent]

/hold

[Reminiscent]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 96cfca0

[ti-chi-bot]

@Reminiscent: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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[hawkingrei]

/run-mysql-test

[Reminiscent]

/hold

[Reminiscent]

The test case will failed after this PR.

drop table t1;
create table t1(f1 int, f2 int);
insert into t1 values (1,2),(3,1),(2,3);
SET sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));
select @var:=f2 from t1 group by f1 order by f2 desc limit 1;
select @var;

We should get the answer 3, but it will get answer 1. Because of we execute projection first, and then do the sort.(Both MySQL and PG).

[ti-chi-bot]

@Reminiscent: PR needs rebase.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.