924060929 opened a new pull request, #11654:
URL: https://github.com/apache/doris/pull/11654
# Proposed changes
1. add `StatementContext`, and `PlannerContext` is renamed to
`CascadsContext`. `CascadsContext` belong to a `StatementContext`, and
`StatementContext` belong to a `ConnectionContext`, and the lifecycle increases
in turn. StatementContext can wrap some statement's lifecycle-related state,
such as ExpressionId, TableLock. `MemoTestUtil` can simplify create a
CascadesContext and Memo for test.
3. add ·PlanPreprocessor` to process parsed logical plan before copy into
memo. and add a `PlanPostprocessor` to process physical plan after copy out
from memo.
4. utilize PlanPreprocessor to process SET_VAR hint
## Checklist(Required)
1. Does it affect the original behavior:
- [ ] Yes
- [x] No
- [ ] I don't know
5. Has unit tests been added:
- [x] Yes
- [ ] No
- [ ] No Need
6. Has document been added or modified:
- [ ] Yes
- [ ] No
- [x] No Need
7. Does it need to update dependencies:
- [ ] Yes
- [x] No
8. Are there any changes that cannot be rolled back:
- [ ] Yes (If Yes, please explain WHY)
- [x] No
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