minni31 opened a new pull request, #12113:
URL: https://github.com/apache/gluten/pull/12113
Implements VeloxRDDScanTransformer to offload RDDScanExec to Velox's native
row-to-columnar conversion path. This enables columnar execution for DataFrames
backed by LogicalRDD (e.g., from df.checkpoint(), df.localCheckpoint(), or
programmatic RDD creation).
Key design:
- Validates schema via VeloxValidatorApi.validateSchema (recursive) plus
Arrow compatibility checks (rejects MapType, interval types)
- Handles BatchCarrierRow (from checkpoint) by unwrapping directly
- Standard InternalRow path delegates to
RowToVeloxColumnarExec.toColumnarBatchIterator
- Preserves original partitioning and ordering from the source RDDScanExec
- Unsupported schemas fall back gracefully to vanilla Spark
Test coverage: 13 tests covering basic types, complex types, aggregation,
empty RDD, nulls, fallback scenarios, and BatchCarrierRow from checkpoint.
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