expression: Support Push Down All Extract Function to TiFlash
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component/tiflash
type/enhancement
- Dominant language
- Go
- Stars
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Description
## Enhancement
Function extract can not be fully pushed down to TiFlash.
Starting from #22832, the function extract is pushed down to TiFlash, however, the support is incomplete.
The current support for the extract function in TiFlash is shown as follows.
- [x] extract datetime(#22832) https://github.com/pingcap/tiflash/pull/1406
- [x] extract duration(#39105) https://github.com/pingcap/tiflash/pull/6205
- [ ] extract datetime from string https://github.com/pingcap/tiflash/pull/6300
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