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https://issues.apache.org/jira/browse/SPARK-60636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-60636:
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Labels: pull-request-available (was: )
> Use SQL signed-zero equality in constant-map hash lookups
> ---------------------------------------------------------
>
> Key: SPARK-60636
> URL: https://issues.apache.org/jira/browse/SPARK-60636
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 5.0.0
> Reporter: Linhong Liu
> Priority: Major
> Labels: pull-request-available
>
> Hash lookups for foldable FLOAT- and DOUBLE-keyed maps distinguish negative
> zero from positive zero, while the linear lookup uses SQL equality and treats
> both signs as equal. Thus the selected lookup strategy can change a result
> from a stored value to NULL. Normalize zero consistently when building and
> probing the interpreted hash index and generated hash buckets. Preserve
> first-match behavior for physical maps containing duplicate zero keys. Tests
> should cover both types and signs, duplicate order, interpreted and generated
> evaluation, and ordinary, NaN, missing, and NULL controls.
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