alexeykudinkin opened a new pull request, #6820:
URL: https://github.com/apache/hudi/pull/6820
### Change Logs
This PR aims at relaxing current `MERGE INTO` constraints to permit limited
casting operations w/in matched-on conditions by:
- Stripping out superfluous symmetrical casting (`cast(target.id as string)
= cast(source.id as string`)
- Verifying that the incoming source dataset's primary-key could actually
be up-casted to the target table's primary-key data-type w/o loss of precision
(for ex, when `target.id` is of type `Int` and `source.id` is of type `Short`)
### Impact
**Risk level: Low**
### Documentation Update
No docs update are required
### Contributor's checklist
- [ ] Read through [contributor's
guide](https://hudi.apache.org/contribute/how-to-contribute)
- [ ] Change Logs and Impact were stated clearly
- [ ] Adequate tests were added if applicable
- [ ] CI passed
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