[DNM]*: demo for no_null_index and use index(tiflash) on release 8.5

[YangKeao]

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary:

ref #61044 and #60010

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

[ti-chi-bot]

This cherry pick PR is for a release branch and has not yet been approved by triage owners.
Adding the do-not-merge/cherry-pick-not-approved label.

To merge this cherry pick:

1. It must be approved by the approvers firstly.
2. AFTER it has been approved by approvers, please wait for the cherry-pick merging approval from triage owners.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[tiprow]

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

Test name	Commit	Details	Required	Rerun command
fast_test_tiprow	cc5c074	link	true	/test fast_test_tiprow
tidb_parser_test	cc5c074	link	true	/test tidb_parser_test

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[YangKeao]

/retest

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign bornchanger, d3hunter, rustin170506, tangenta, yudongusa for approval. For more information see the Code Review Process.
Please ensure that each of them provides their approval before proceeding.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS
• pkg/ddl/OWNERS
• pkg/meta/OWNERS
• pkg/parser/OWNERS
• pkg/planner/OWNERS
• pkg/table/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[codecov]

Codecov Report

Attention: Patch coverage is 72.80702% with 62 lines in your changes missing coverage. Please review.

Please upload report for BASE (release-8.5@b992ca8). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.5     #61123   +/-   ##
================================================
  Coverage               ?   77.1922%           
================================================
  Files                  ?       1642           
  Lines                  ?     450346           
  Branches               ?          0           
================================================
  Hits                   ?     347632           
  Misses                 ?      81407           
  Partials               ?      21307           

Flag	Coverage Δ
integration	50.3495% <71.4912%> (?)
unit	72.6495% <38.1578%> (?)

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

Components	Coverage Δ
dumpling	52.9278% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	63.1155% <0.0000%> (?)

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[ti-chi-bot]

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

Test name	Commit	Details	Required	Rerun command
pull-integration-e2e-test	cc5c074	link	true	/test pull-integration-e2e-test
pull-integration-ddl-test	cc5c074	link	true	/test pull-integration-ddl-test
pull-mysql-client-test	cc5c074	link	true	/test pull-mysql-client-test
pull-lightning-integration-test	cc5c074	link	true	/test pull-lightning-integration-test

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[YangKeao]

pkg/executor/test/seqtest exceeds time limit 🤦 . Let me check.