pingcap / pingcap/tidb

Enble executing CTE on the MPP side by default

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#61,241 0 comments 0 reactions 0 assignees View on GitHub
type/enhancement
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Description

## Enhancement

Make executing CTE on the MPP side by default

- [x] be compatible with tiflash's new CTE operator
- [x] solving issues that CTE can't be converted to MPP one.
- [ ] solving the issue that union all may block the mpp execution

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