types: Fix `TIMESTAMPADD` lost fractional digits

[birdstorm]

Signed-off-by: birdstorm [email protected]

What problem does this PR solve?

Issue Number: close #31795

Problem Summary:

What is changed and how it works?

TiDB lost fractional digits when using SECOND as unit type for interval. Refrence

Check List

Tests

• [x] Unit test
• [x] 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
• [x] 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:

• windtalker
• winoros

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[birdstorm]

/run-mysql-test tidb-test=pr/2018

[birdstorm]

/run-mysql-test tidb-test=pr/2018

[birdstorm]

/run-check_dev_2

[birdstorm]

/run-mysql-test tidb-test=pr/2018

[windtalker]

/merge

[ti-chi-bot]

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

Commit hash: 330599d7b9d34342ec04ff62c75b9f1a17f8538c

[windtalker]

/run-mysql-test tidb-test=pr/2018

[birdstorm]

/run-unit-test

[birdstorm]

/run-unit-test

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #39285.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #39286.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #39287.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #39288.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #39289.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #39290.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #39291.

[sre-bot]

TiDB MergeCI notify

🔴 Bad News! New failing [3] after this pr merged. These new failed integration tests seem to be caused by the current PR, please try to fix these new failed integration tests, thanks!

CI Name	Result	Duration	Compare with Parent commit
idc-jenkins-ci-tidb/integration-common-test	🟥 failed 2, success 15, total 17	16 min	New failing
idc-jenkins-ci-tidb/common-test	🟥 failed 1, success 10, total 11	9 min 21 sec	New failing
idc-jenkins-ci-tidb/integration-ddl-test	🟥 failed 1, success 5, total 6	6 min 21 sec	New failing
idc-jenkins-ci/integration-cdc-test	🔴 failed 1, success 38, total 39	21 min	Existing failure
idc-jenkins-ci-tidb/mybatis-test	🔴 failed 1, success 0, total 1	11 min	Existing failure
idc-jenkins-ci-tidb/tics-test	🟢 all 1 tests passed	6 min 40 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-2	🟢 all 28 tests passed	4 min 51 sec	Existing passed
idc-jenkins-ci-tidb/sqllogic-test-1	🟢 all 26 tests passed	4 min 42 sec	Existing passed
idc-jenkins-ci-tidb/integration-compatibility-test	🟢 all 1 tests passed	2 min 43 sec	Existing passed
idc-jenkins-ci-tidb/plugin-test	🟢 build success, plugin test success	4min	Existing passed

[birdstorm]

In response to MergeCI:

• common-test and integration-common-test are related to mysql-test pr#2018, and should be fixed now after merging.
• other test failures are not related to this PR