fix: ut and more idx error

[SchrodingerZhu]

Signed-off-by: SchrodingerZhu i@zhuyi.fan

What problem does this PR solve?

Issue Number: close #4778

This PR fixes the problem mentioned in #4778 and add variant frame lengths to cover the cases.

What is changed and how it works?

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

fix potential data corruption for large indices

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• hehechen
• lidezhu

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After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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[SchrodingerZhu]

/run-all-tests

[sre-bot]

Coverage for changed files

Filename                                Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Server/DTTool/DTToolMigrate.cpp             223                80    64.13%          11                 1    90.91%         283               154    45.58%         132                76    42.42%
Server/tests/gtest_dttool.cpp               422                53    87.44%           7                 0   100.00%         223                 6    97.31%         150                64    57.33%
Storages/DeltaMerge/File/DMFile.cpp         341               109    68.04%          46                 2    95.65%         691               122    82.34%         204                64    68.63%
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                                       986               242    75.46%          64                 3    95.31%        1197               282    76.44%         486               204    58.02%

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18056      10153            43.77%    200047  100965       49.53%

full coverage report (for internal network access only)

[SchrodingerZhu]

/merge

[ti-chi-bot]

@SchrodingerZhu: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

You only need to trigger /merge once, and if the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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[ti-chi-bot]

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

Commit hash: 2b3417e

[ti-chi-bot]

@SchrodingerZhu: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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 ti-community-infra/tichi repository.

[sre-bot]

Coverage for changed files

Filename                                Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Server/DTTool/DTToolMigrate.cpp             223                80    64.13%          11                 1    90.91%         283               154    45.58%         132                76    42.42%
Server/tests/gtest_dttool.cpp               422                53    87.44%           7                 0   100.00%         223                 6    97.31%         150                64    57.33%
Storages/DeltaMerge/File/DMFile.cpp         341               109    68.04%          46                 2    95.65%         691               122    82.34%         204                64    68.63%
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                                       986               242    75.46%          64                 3    95.31%        1197               282    76.44%         486               204    58.02%

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18056      10152            43.77%    200047  100944       49.54%

full coverage report (for internal network access only)

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #4789.

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #4790.