HIVE-29287: Iceberg: Variant Shredding support #6152
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deniskuzZ
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same thing as apache/iceberg#14297 |
deniskuzZ
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deniskuzZ
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Oct 31, 2025
| TableScan | ||
| alias: tbl_shredded_variant | ||
| filterExpr: (UDFToDouble(variant_get(data, '$.age')) > 25.0D) (type: boolean) | ||
| Statistics: Num rows: 3 Data size: 1020 Basic stats: COMPLETE Column stats: NONE |
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PPD is not supported here, would be addressed in a separate JIRA
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What changes were proposed in this pull request?
Support for variant shredding, enabling Hive to write shredded variant data into Iceberg tables.
Ideally, this should follow the approach described in the reader/writer API proposal for Iceberg V4, where an execution engine provides the shredded writer schema.
As an interim solution, this PR introduces a writer that infers the shredded schema from the sample record captured before the Parquet writer is initialized.
Why are the changes needed?
Enables data skipping (predicate pushdown)
Does this PR introduce any user-facing change?
No
How was this patch tested?
variant_type_shredding.q