[pull] master from prestodb:master#751
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Summary: `findTableScanNodes()` does not match `IndexSourceNode`, so index splits never reach Spark task assignments. `IndexLookupJoin` sees zero index splits and produces no matches -- inner joins return empty results, and left joins silently fill the right side with NULLs. Fix: extend the predicate to also match `IndexSourceNode`. ## Release Notes ``` == NO RELEASE NOTE == ```
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