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https://issues.apache.org/jira/browse/HIVE-16940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16058934#comment-16058934
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Gopal V commented on HIVE-16940:
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There's the planning part which throws out vectorization and then all the
specialized map-joins need to replace all forward() calls with
forwardToFilter() and bounce the output VRBs through any filters if they exist.
> Residual predicates in join operator prevent vectorization
> ----------------------------------------------------------
>
> Key: HIVE-16940
> URL: https://issues.apache.org/jira/browse/HIVE-16940
> Project: Hive
> Issue Type: Improvement
> Components: Vectorization
> Affects Versions: 3.0.0
> Reporter: Jesus Camacho Rodriguez
>
> With HIVE-16885, filter predicates in ON clause for INNER joins are pushed
> within the join operator (residual predicates in the operator). Previously,
> residual predicates were only used for OUTER join operators.
> Currently, vectorization does not support the evaluation of residual
> predicates that are within an INNER join, and thus, it gets disabled if the
> filter expression is pushed within the join. We should implement the
> vectorization of INNER join in the presence of residual predicates.
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