disttask, ddl: refine disttask_flow

[ywqzzy]

What problem does this PR solve?

Issue Number: ref #46258

Problem Summary:

What is changed and how it works?

Make the code cleaner.
Add realtikv test for non-partition table.

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]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

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Hi @ywqzzy. Thanks for your PR.

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[codecov]

Codecov Report

Merging #46472 (5054030) into master (c38f0c1) will decrease coverage by 0.6423%.
Report is 41 commits behind head on master.
The diff coverage is 42.6229%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #46472        +/-   ##
================================================
- Coverage   73.3859%   72.7436%   -0.6423%     
================================================
  Files          1291       1323        +32     
  Lines        393578     401591      +8013     
================================================
+ Hits         288831     292132      +3301     
- Misses        86372      91002      +4630     
- Partials      18375      18457        +82     

Flag	Coverage Δ
integration	25.7005% <7.3770%> (?)
unit	73.4191% <42.6229%> (+0.0331%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	54.0444% <ø> (ø)
parser	85.0638% <ø> (+0.0005%)	⬆️
br	48.0763% <ø> (-4.1894%)	⬇️

[ywqzzy]

/ok-to-test

[tiprow]

@ywqzzy: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
tiprow_fast_test	5054030	link	true	/test tiprow_fast_test

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[GMHDBJD]

LGTM

[GMHDBJD]

Can we log here instead of return the error but ignore?

[ywqzzy]

ignore

I think current implementation is ok, we can't assume the d DDL is *ddl

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: GMHDBJD, tangenta

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-08-29 07:48:42.070776174 +0000 UTC m=+1826886.619792157: ☑️ agreed by tangenta.
• 2023-08-29 09:42:54.414490731 +0000 UTC m=+1833738.963506717: ☑️ agreed by GMHDBJD.