caiconghui

[Bug] set enable_projection to false will cause select stmt analyze failed

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### Search before asking - [X] I had searched in the [issues](https://github.com/apache/incubator-doris/issues?q=is%3Aissue) and found no similar issues. ### Version master and lts ### What's Wrong? set enable_projection=false; select count() from...

[enhancement](transaction) Reduce hold writeLock time for DatabaseTransactionMgr to clear transaction

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# Proposed changes Issue Number: close #xxx ## Problem summary make clear transaction operation log more light to reduce hold writeLock time ## Checklist(Required) * [ ] Does it affect...

[enhancement](export) filter empty partition before export table to remote storage

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## Proposed changes Issue Number: close #xxx ## Further comments If this is a relatively large or complex change, kick off the discussion at [[email protected]](mailto:[email protected]) by explaining why you chose...

[enhancement](export) filter empty partition before export table to remote storage

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## Proposed changes Issue Number: close #xxx ## Further comments If this is a relatively large or complex change, kick off the discussion at [[email protected]](mailto:[email protected]) by explaining why you chose...

[fix](export) fix that export table retry with same label should succeed when first export job failed

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## Proposed changes Issue Number: close #xxx