feat(spark): add arrays_overlap with Spark three-valued null semantics#20781
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n0r0shi wants to merge 1 commit intoapache:mainfrom
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feat(spark): add arrays_overlap with Spark three-valued null semantics#20781n0r0shi wants to merge 1 commit intoapache:mainfrom
arrays_overlap with Spark three-valued null semantics#20781n0r0shi wants to merge 1 commit intoapache:mainfrom
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DataFusion's built-in `array_has_any` returns `false` when arrays have no definite overlap but contain null elements. Spark's `arrays_overlap` returns `null` in this case (three-valued logic: overlap is unknown because nulls could match any value). This wraps `array_has_any` and patches results where `false` + either array has nulls → `null`, following the same pattern as SparkArrayContains.
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it might be similar to #20611 |
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Which issue does this PR close?
Closes #15914 (partial — adds one more Spark-compatible function)
Related: apache/datafusion-comet#3645
Rationale
Spark's
arrays_overlapuses three-valued null logic, which differs from DataFusion's built-inarray_has_any:arrays_overlaparray_has_any[1, 2],[2, 3]truetrue[1, 2],[3, 4]falsefalse[1, NULL],[3]nullfalse[1, 2],[3, NULL]nullfalse[1, NULL],[1, 3]truetrueIn Spark, when there's no definite overlap but either array contains a null element, the result is
null.What changes are included in this PR?
Adds
SparkArraysOverlapto thedatafusion-sparkcrate, following the same pattern asSparkArrayContains: delegate to DataFusion'sarray_has_any, then patch rows where the result isfalseand either input array contains null elements tonull.Are these changes tested?
Unit tests covering:
truefalsenullnulltrue(definite match trumps null)null