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Posted to issues@arrow.apache.org by "Weston Pace (Jira)" <ji...@apache.org> on 2022/05/24 22:41:00 UTC

[jira] [Created] (ARROW-16646) [C++] HashJoin node can crash if a key column is a scalar

Weston Pace created ARROW-16646:
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             Summary: [C++] HashJoin node can crash if a key column is a scalar
                 Key: ARROW-16646
                 URL: https://issues.apache.org/jira/browse/ARROW-16646
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Weston Pace


This only happens when the node has a bloom filter pushed down into it.  In that case it will attempt to hash the key columns in {{arrow::compute::HashJoinBasicImpl::ApplyBloomFiltersToBatch}} by calling {{Hashing32::HashBatch}} on a batch made up only of key columns.

If one of those key columns happens to be a scalar, and not an array, then this method triggers a {{DCHECK}} and crashes.



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