fix(tianmu): the instance crashed while exporting data (#1961)

[TomeC]

Summary about this PR

Issue Number: close #1961

Tests Check List

• [x] Unit test
• [ ] Integration test
• [ ] Manual test (add detailed scripts or steps below)
• [ ] No code

Changelog

• [ ] New Feature
• [x] Bug Fix
• [ ] Performance Improvement
• [ ] Build/Testing/CI/CD
• [ ] Documentation
• [ ] Not for changelog (changelog entry is not required)

Documentation

• [ ] Affects user behaviors
• [ ] Contains syntax changes
• [ ] Contains variable changes
• [ ] Contains experimental features

[mergify[bot]]

Thanks for the contribution! I have applied any labels matching special text in your PR Changelog.

Please review the labels and make any necessary changes.

[TomeC]

@Nliver StoneDB Compile & MTR failed, reason:

This request was automatically failed because there were no enabled runners online to process the request for more than 1 days.

[Nliver]

@Nliver StoneDB Compile & MTR failed, reason:

This request was automatically failed because there were no enabled runners online to process the request for more than 1 days.

Thanks a lot, We will check this issue and fix it~

[Nliver]

@Nliver StoneDB Compile & MTR failed, reason:

This request was automatically failed because there were no enabled runners online to process the request for more than 1 days.

Hello, our Github Action has been restored~

[codecov[bot]]

Codecov Report

Attention: 57 lines in your changes are missing coverage. Please review.

Comparison is base (6a560a0) 60.23% compared to head (5c4dad0) 60.07%. Report is 28 commits behind head on stonedb-5.7-dev.

Files	Patch %	Lines
storage/tianmu/core/tianmu_table.cpp	5.55%	17 Missing :warning:
storage/tianmu/handler/ha_tianmu.cpp	0.00%	9 Missing :warning:
storage/tianmu/core/engine.cpp	53.33%	7 Missing :warning:
storage/tianmu/loader/load_parser.cpp	55.55%	4 Missing :warning:
sql/sql_yacc.yy	0.00%	3 Missing :warning:
storage/tianmu/optimizer/aggregator_basic.cpp	40.00%	3 Missing :warning:
storage/tianmu/core/value_or_null.cpp	77.77%	2 Missing :warning:
storage/tianmu/vc/multi_value_column.h	0.00%	2 Missing :warning:
sql/binlog.cc	0.00%	1 Missing :warning:
storage/tianmu/core/item_tianmu_field.cpp	80.00%	1 Missing :warning:
... and 8 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## stonedb-5.7-dev #1964 +/- ## =================================================== - Coverage 60.23% 60.07% -0.17% =================================================== Files 1837 1837 Lines 380671 380786 +115 =================================================== - Hits 229316 228744 -572 - Misses 151355 152042 +687 ```

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[TomeC]

codecov/project Failing, But according to the prompts, I did not modify those files.

[Nliver]

codecov/project Failing, But according to the prompts, I did not modify those files.

We are checking what caused it and fixing the problem later~

[mergify[bot]]

Thanks for the contribution! I have applied any labels matching special text in your PR Changelog.

Please review the labels and make any necessary changes.