zhanghe

[BugFix] fix an issue that user-defined variables sql unable to handle variable dependencies

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## Why I'm doing: ## What I'm doing: Fixes #47370 ## What type of PR is this: - [x] BugFix - [ ] Feature - [ ] Enhancement - [...

[BugFix] In a concurrency scenario, after a tablet is deleted, its corresponding data directory still exists.

3

## Why I'm doing: ## What I'm doing: Fixes #50383 ## What type of PR is this: - [x] BugFix - [ ] Feature - [ ] Enhancement - [...

### Steps to reproduce the behavior (Required) ``` BE log: I0826 11:32:01.586261 892877 storage_engine.cpp:994] start to sweep trash(first sweep) BE log: I0826 11:32:18.161396 268541 agent_task.cpp:358] local tablet migration succeeded. status:...

[BugFix] Setting max_compaction_concurrency to -1/0 via dynamic parameter is not as expected.

3

## Why I'm doing: ## What I'm doing: Fixes #50876 ## What type of PR is this: - [x] BugFix - [ ] Feature - [ ] Enhancement - [...

[BugFix] The update_config interface still returns success after the dynamic parameter setup fails.

3

## Why I'm doing: ## What I'm doing: Fixes #50822 ## What type of PR is this: - [x] BugFix - [ ] Feature - [ ] Enhancement - [...