[I] feat(datafusion): support partition predicate pushdown [paimon-rust]

["QuakeWang (via GitHub)" <gi...@apache.org>]

QuakeWang opened a new issue, #172:
URL: https://github.com/apache/paimon-rust/issues/172

   ### Search before asking
   
   - [x] I searched in the [issues](https://github.com/apache/paimon-rust/issues) and found nothing similar.
   
   
   ### Description
   
   The current DataFusion integration ignores pushed-down filters and always plans a full Paimon scan.
   
   This task is to add partition predicate pushdown support in `paimon-datafusion` by translating exact partition-only DataFusion filters and wiring them into the existing Paimon scan planning path.
   
   For a partitioned table, queries such as:
   
   ```sql
   SELECT * FROM t WHERE dt = '2024-01-01'
   SELECT * FROM t WHERE dt = '2024-01-01' AND hr = 10
   ```
   
   should only plan matching partitions.
   
   Unsupported or non-partition filters should remain as residual DataFusion filters.
   
   Out of scope:
   - data predicate pushdown into TableRead
   - manifest stats pruning
   - data file stats pruning
   - limit pushdown
   
   This task depends on the core partition predicate pruning support from issue #155 / PR #167.
   
   ### Willingness to contribute
   
   - [x] I'm willing to submit a PR!


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Re: [I] feat(datafusion): support partition predicate pushdown [paimon-rust]

["JingsongLi (via GitHub)" <gi...@apache.org>]

JingsongLi closed issue #172: feat(datafusion): support partition predicate pushdown
URL: https://github.com/apache/paimon-rust/issues/172


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