vamsikarnika opened a new pull request, #18106:
URL: https://github.com/apache/hudi/pull/18106
### Describe the issue this Pull Request addresses
For pre-v9 tables (e.g., version 6), getRecordMergeMode() returns null
because the hoodie.record.merge.mode property didn't exist. This caused
generateRequiredSchema to skip the CUSTOM merge mode path, returning selective
fields instead of the full table schema for custom payload classes like
HoodieMetadataPayload.
The fix adds the same inferMergingConfigsForPreV9Table inference that
getMandatoryFieldsForMerging already uses, ensuring consistent behavior between
v6 and v9 tables.
### Impact
No public API changes. For pre-v9 tables using custom payload classes (e.g.,
metadata tables with HoodieMetadataPayload), the file group reader will now
correctly return the full table schema instead of selective fields, matching
the behavior of v9 tables.
### Risk Level
Low
### Documentation Update
None. This is an internal bug fix with no new configs or user-facing changes.
### Contributor's checklist
- [ ] Read through [contributor's
guide](https://hudi.apache.org/contribute/how-to-contribute)
- [ ] Enough context is provided in the sections above
- [ ] Adequate tests were added if applicable
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