fix(tianmu): tianmu.primary_secondary_bit crashed or failed(#1212)

[konghaiya]

There is a problem with the judgment condition for obtaining the unique constraint. The key should be determined in advance_ Whether the number of parts is greater than 0

Summary about this PR

Issue Number: close #1212

Tests Check List

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

Changelog

• New Feature
• 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]

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[codecov]

Codecov Report

Base: 43.33% // Head: 43.35% // Increases project coverage by +0.01% 🎉

Coverage data is based on head (7a90be8) compared to base (71a27c4).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head 7a90be8 differs from pull request most recent head 55bcb62. Consider uploading reports for the commit 55bcb62 to get more accurate results

Additional details and impacted files

@@                 Coverage Diff                 @@
##           stonedb-5.7-dev    #1233      +/-   ##
===================================================
+ Coverage            43.33%   43.35%   +0.01%     
===================================================
  Files                 1830     1830              
  Lines               396140   396142       +2     
===================================================
+ Hits                171682   171731      +49     
+ Misses              224458   224411      -47     

Impacted Files	Coverage Δ
sql/log_event_push_cond.cc	83.21% <100.00%> (+0.23%)	⬆️
storage/innobase/sync/sync0arr.cc	53.38% <0.00%> (-0.85%)	⬇️
storage/tianmu/compress/top_bit_dict.cpp	61.53% <0.00%> (-0.66%)	⬇️
sql/sql_profile.cc	10.30% <0.00%> (-0.43%)	⬇️
storage/innobase/btr/btr0sea.cc	74.45% <0.00%> (-0.19%)	⬇️
storage/innobase/trx/trx0rec.cc	82.85% <0.00%> (-0.16%)	⬇️
storage/innobase/row/row0merge.cc	72.26% <0.00%> (-0.09%)	⬇️
storage/tianmu/core/engine.cpp	54.76% <0.00%> (+0.08%)	⬆️
storage/innobase/buf/buf0flu.cc	85.87% <0.00%> (+0.10%)	⬆️
storage/innobase/include/ib0mutex.h	72.20% <0.00%> (+0.37%)	⬆️
... and 4 more

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[lujiashun]

LGTM

[mergify]

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

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