[SPARK-55617] Add VariantGet to V2ExpressionBuilder for DSv2 filter pushdown#54394
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[SPARK-55617] Add VariantGet to V2ExpressionBuilder for DSv2 filter pushdown#54394qlong wants to merge 1 commit intoapache:masterfrom
qlong wants to merge 1 commit intoapache:masterfrom
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…ushdown Add a VariantGet case in V2ExpressionBuilder.generateExpression() so that variant_get and try_variant_get predicates can be translated into V2 UserDefinedScalarFunc and pushed down to connectors via SupportsPushDownV2Filters. This is to support file-level skipping for shredded variant columns in Iceberg. Only foldable paths and direct table column references for the variant column are supported.
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- SparkV2Filters: Convert variant_get/try_variant_get to Expressions.extract() - Spark3Util.describe: Output extract terms as variant_get() for EXPLAIN - Add tests for both Depends on Spark PR: apache/spark#54394
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This is the PR on the iceberg side for variant filter pushdown for file skipping. apache/iceberg#15385 |
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Add a VariantGet case in V2ExpressionBuilder.generateExpression() so that variant_get and try_variant_get predicates can be translated into V2 UserDefinedScalarFunc and pushed down to connectors via SupportsPushDownV2Filters.
This is to support file-level skipping for shredded variant columns in Iceberg. Only foldable paths and direct table column references for the variant column are supported.
What changes were proposed in this pull request?
Add a VariantGet case in V2ExpressionBuilder.generateExpression() so that variant_get and try_variant_get predicates can be translated into V2 UserDefinedScalarFunc and pushed down to connectors via SupportsPushDownV2Filters.
Jira: https://issues.apache.org/jira/browse/SPARK-55617
Why are the changes needed?
This is to support file-level skipping for shredded variant columns in Iceberg. Only foldable paths and direct table column references for the variant column are supported.
Does this PR introduce any user-facing change?
No
How was this patch tested?
Added unit tests.
Was this patch authored or co-authored using generative AI tooling?
Co-authored with Claude Sonnet.