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Commit 1af0dee4 authored by Bogdan Raducanu's avatar Bogdan Raducanu Committed by Herman van Hovell
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[SPARK-19512][SQL] codegen for compare structs fails

## What changes were proposed in this pull request?

Set currentVars to null in GenerateOrdering.genComparisons before genCode is called. genCode ignores INPUT_ROW if currentVars is not null and in genComparisons we want it to use INPUT_ROW.

## How was this patch tested?

Added test with 2 queries in WholeStageCodegenSuite

Author: Bogdan Raducanu <bogdan.rdc@gmail.com>

Closes #16852 from bogdanrdc/SPARK-19512.
parent 4064574d
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