bp #42882#43246#43336
We pick these PRs together because they all fix one problem and if not
do so, the regression test won't be passed.
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Co-authored-by: Sun Chenyang <csun5285@gmail.com>
Co-authored-by: qidaye <luen@selectdb.com>
### What problem does this PR solve?
pick #43000
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Issue Number: close #xxx
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Problem Summary:
### Check List (For Committer)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
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- Behavior changed:
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nereids will parse function statement when replay create alias function,
when do parse, need to get sql mode and other variable. because replay
thread do not have connect context, NPE be thrown when parsing
### What problem does this PR solve?
Problem Summary:
There is a memory leak on FE side when continue running `export`
command.
The `ExportTaskExecutor` instances will be added to
`TransientTaskManager` and never be removed.
This PR mainly changes:
1. Remove unused `ExportTaskRegister` in `Env`.
2. Remove `ExportTaskExecutor` from `TransientTaskManager` once export
job is finished or cancelled.
### Release note
Fix FE memory leak by removing `ExportTaskExecutor` from
`TransientTaskManager` once export job is finished or cancelled.
pick:#42007
add Nereids GarbageCollect Time and Nereids BeFoldConst Time to profile
## Proposed changes
Issue Number: close #xxx
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pick from master #42576
intro by #39316. it want to fix a problem intro by #36699. but forgot to
remove all wrong code in #36699.
after #39316, we should not set offset on exchange, when the exchange is
on the top of a limit with offset.
## Proposed changes
1. Fix forward query exception if no status code is set in master
execution. EOF may result in this status.
2. Fix forward query stuck due to no result packet sent to mysql
channel. Should use result packets from master.
3. Fix potential forward query result loss if follower can read status
change during query process. Should judge by the status once before
execution.
4. Add assertion for regression test.
