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  1. Blazegraph (by SYSTAP)
  2. BLZG-713

AST2BOpUtility wraps UNION with an unnecessary hash join

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      Description

      We changed UNION to use a simple TEE operator (or set of TEEs), but we never fixed it so that the UNION wasn't wrapped by a hash join (it needed to be when UNION was a subquery operator).

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        mikepersonick mikepersonick added a comment -

        I fixed it. The convertJoinGroup method now special cases a UnionNode separately from other GraphPatternGroups and skips the hash join step.

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        mikepersonick mikepersonick added a comment - I fixed it. The convertJoinGroup method now special cases a UnionNode separately from other GraphPatternGroups and skips the hash join step.

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          • Assignee:
            mikepersonick mikepersonick
            Reporter:
            mikepersonick mikepersonick
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