EasonBall

There are many duplicated logic in cross join, you can try to make it cleaner.

Refactor expression module structure.

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The code of expression module can have a better structure and code style.

[DNM]infoschema: speed up reader for some tables

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### What problem does this PR solve? Issue Number: ref #50305 Problem Summary: ### What changed and how does it work? ### Check List Tests - [x] Unit test -...

DFE: Can't start worker normally when met worker suicide for master failover

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### What did you do? 1. master-0 failover to master-1 2. previous worker commit suicide 3. start a new worker but the worker stopped quickly. 4. repeat step 3 forever...