session: add resource group name in stmt context (#49422)

[ti-chi-bot]

This is an automated cherry-pick of #49422

What problem does this PR solve?

Issue Number: ref #49318

Problem Summary:

What changed and how does it work?

In the current implementation, in order to support statement level hint /* +RESOURCE_GROUP(name) */ to execute a statement under specific resource group, we change the ResourceGroupName in session ctx during optimization and change back after the statement. This is currently done in the function session.ExecuteStmt(with a defer block). This life time may not be long enough as we have other operations such as query slow-log, query duration metrics, statement summary that depend on statement resource group but is run after session.ExecuteStmt is finished.

So this PR add a new field ResourceGroupName in StmtCtx and the /* Resource_Group() */ hint will change this filed isstead of directly change session context and this value can last until the next statement. The PR changes all statement related operation to use this field.

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

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-02-19 03:46:38.118718272 +0000 UTC m=+242486.866341383: ☑️ agreed by nolouch.
• 2024-02-19 03:58:46.467964324 +0000 UTC m=+243215.215587435: ☑️ agreed by glorv.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-7.5@bdcd16d). Click here to learn what that means.
The diff coverage is 94.5945%.

Additional details and impacted files

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Flag	Coverage Δ
unit	72.0090% <94.5945%> (?)

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

Components	Coverage Δ
dumpling	53.9913% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	53.3622% <0.0000%> (?)

[glorv]

/retest

[easonn7]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: easonn7, glorv, nolouch, wjhuang2016, XuHuaiyu

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Needs approval from an approver in each of these files:

• OWNERS [XuHuaiyu,glorv,wjhuang2016]
• pkg/ddl/OWNERS [wjhuang2016]
• pkg/distsql/OWNERS [XuHuaiyu]
• pkg/expression/OWNERS [XuHuaiyu]
• pkg/sessionctx/variable/OWNERS [easonn7]

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