David Li created ARROW-14185:
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Summary: [C++] HashJoinNode should validate HashJoinOptions
Key: ARROW-14185
URL: https://issues.apache.org/jira/browse/ARROW-14185
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: David Li
Fix For: 6.0.0
At the very least key_cmp needs to match the number of join columns, there may
be other invariants to uphold. Probably all the ones from the [semi-join
PR|https://github.com/apache/arrow/pull/10845/files#diff-1028a02ecee91ae8a9fbb7318e1ce650760716d317457d48e0740c802287fbdbR38]:
there must be the same, non-zero number of keys on both sides.
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