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[CALCITE-6451] Improve Nullability Derivation for Intersect and Minus #3845

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[CALCITE-6451] Improve Nullability Derivation for Intersect and Minus #3845

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Commits on Jul 6, 2024

  1. [CALCITE-6451] Refine nullability of outputs for MINUS and INTERSECT 

    For Minus, the output column nullability is that of the primary input

For Intersect, an output column is nullable if and only if it is
nullable in all of the inputs
    @vbarua
    vbarua committed Jul 6, 2024
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Commits on Jul 20, 2024

  1. [CALCITE-6451] refine null handling in IntersectToDistinctRule 

    Updates the IntersectToDistinctRule to:
* Filter inputs before aggregation to exclude nulls when possible
* Force the correct nullabilities for output columns
    @vbarua
    vbarua committed Jul 20, 2024
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