execution: avoid decimal overflow and check valid

[fzhedu]

Signed-off-by: fzhedu fzhedu@gmail.com

What problem does this PR solve?

Issue Number: close #34388. close #30347

Problem Summary:

1. avoid the flen/decimal overflow, so check the flen and decimal when set them for decimal;
2. check the valid decimal when pushing down decimal, because TiFlash cannot solve invalid flen/decimal of decimal.

What is changed and how it works?

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:

• guo-shaoge
• windtalker

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[sre-bot]

Please follow PR Title Format:

• pkg [, pkg2, pkg3]: what is changed

Or if the count of mainly changed packages are more than 3, use

• *: what is changed

After you have format title, you can leave a comment /run-check_title to recheck it

[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/15fe79f479c6e2e377c3aefc265223e3aac12987

[fzhedu]

/rebuild

[fzhedu]

/rebuild

[fzhedu]

/rebuild

[fzhedu]

/merge

[ti-chi-bot]

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

Commit hash: 15fe79f

[ti-srebot]

cherry pick to release-5.0 in PR #35479

[ti-srebot]

cherry pick to release-5.1 in PR #35480

[ti-srebot]

cherry pick to release-5.2 in PR #35481

[ti-srebot]

cherry pick to release-5.3 in PR #35482

[ti-srebot]

cherry pick to release-5.4 in PR #35483

[ti-srebot]

cherry pick to release-6.0 in PR #35484

[ti-srebot]

cherry pick to release-6.1 in PR #35485

[sre-bot]

TiDB MergeCI notify

✅ Well Done! New fixed [1] after this pr merged.

CI Name	Result	Duration	Compare with Parent commit
idc-jenkins-ci-tidb/integration-common-test	✅ all 11 tests passed	17 min	Fixed
idc-jenkins-ci/integration-cdc-test	🟢 all 34 tests passed	25 min	Existing passed
idc-jenkins-ci-tidb/common-test	🟢 all 12 tests passed	12 min	Existing passed
idc-jenkins-ci-tidb/tics-test	🟢 all 1 tests passed	6 min 10 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-2	🟢 all 28 tests passed	5 min 54 sec	Existing passed
idc-jenkins-ci-tidb/integration-ddl-test	🟢 all 6 tests passed	5 min 46 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-1	🟢 all 26 tests passed	5 min 46 sec	Existing passed
idc-jenkins-ci-tidb/integration-compatibility-test	🟢 all 1 tests passed	4 min 6 sec	Existing passed
idc-jenkins-ci-tidb/mybatis-test	🟢 all 1 tests passed	3 min 57 sec	Existing passed
idc-jenkins-ci-tidb/plugin-test	🟢 build success, plugin test success	4min	Existing passed