Bruno Volpato created CALCITE-7817:
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Summary: Enumerable merge ANTI join drops left rows with NULL keys
Key: CALCITE-7817
URL: https://issues.apache.org/jira/browse/CALCITE-7817
Project: Calcite
Issue Type: Bug
Reporter: Bruno Volpato
With ascending, NULLS LAST inputs, an equality ANTI join of left `[1, 2, NULL]`
and right `[1]` returns `[2]`. The `NULL` key does not match under strict
equality, so the result should be `[2, NULL]`.
The enumerable merge join stops processing left rows when it reaches a NULL
join key. The ANTI path should preserve those rows across all merge-join
advancement paths.
Fix and regression tests: https://github.com/apache/calcite/pull/5242
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