sessionctx,executor: support div_precision_increment sysvar | tidb-test=pr/2311

[yibin87]

What problem does this PR solve?

Issue Number: close #51501

Problem Summary:

What changed and how does it work?

Check List

Tests

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

  • I checked and no code files have been changed.

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

[tiprow]

Hi @yibin87. Thanks for your PR.

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[codecov]

Codecov Report

Merging #51538 (48c8145) into master (dbdae85) will increase coverage by 2.2089%.
Report is 4 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #51538        +/-   ##
================================================
+ Coverage   70.7379%   72.9468%   +2.2089%     
================================================
  Files          1476       1476                
  Lines        437399     443926      +6527     
================================================
+ Hits         309407     323830     +14423     
+ Misses       108615      99971      -8644     
- Partials      19377      20125       +748     

Flag	Coverage Δ
integration	49.0321% <82.5000%> (?)
unit	70.5344% <100.0000%> (-0.0179%)	⬇️

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

Components	Coverage Δ
dumpling	53.9957% <ø> (ø)
parser	∅ <ø> (∅)
br	51.4970% <ø> (+5.5809%)	⬆️

[yibin87]

/test build

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[yibin87]

/test build

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[hawkingrei]

/ok-to-test

[yibin87]

/test build

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[yibin87]

/cc @windtalker @SeaRise

[windtalker]

LGTM

[yibin87]

/hold

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-03-08 02:30:24.124005796 +0000 UTC m=+393451.146252181: ☑️ agreed by SeaRise.
• 2024-03-11 01:23:16.513680449 +0000 UTC m=+648623.535926837: ☑️ agreed by windtalker.

[yibin87]

/cc @easonn7

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[easonn7]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: easonn7, SeaRise, windtalker

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Needs approval from an approver in each of these files:

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[yibin87]

/unhold

[yibin87]

/test check-dev

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[yibin87]

/test check-dev2

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[yibin87]

/test unit-test

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