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https://issues.apache.org/jira/browse/HIVE-11726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14804324#comment-14804324
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Hari Sankar Sivarama Subramaniyan commented on HIVE-11726:
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Agree with [~jcamachorodriguez] on this. I think PointLookUpOptimizer should
have logic to only transform OR/AND predicates to IN. HIVE-11634 should support
separating the partition columns (which should take place even for an user
input IN(STRUCT(..) query). HIVE-11726 should have the logic to push predicates
to the metastore filter. We should make sure that these transformations work
independently as well, i.e all possible combinations of enable/disable of point
lookup/partition column separation.
Thanks
Hari
> Pushed IN predicates created by PointLookupOptimizer to the metastore
> ---------------------------------------------------------------------
>
> Key: HIVE-11726
> URL: https://issues.apache.org/jira/browse/HIVE-11726
> Project: Hive
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Attachments: HIVE-11726.patch
>
>
> The PointLookupOptimizer can turn off some of the optimizations due to its
> use of tuple IN() clauses.
> HIVE-11573 introduced the extraction of sub-clauses that could be pushed down
> till the TableScan operators, though they wouldn't be pushed down to the
> metastore.
> In this issue, we tackle this problem by:
> 1) Grouping the columns in the sub-clauses depending on their lineage. This
> way PPD will be able to push them down throw the plan without any extension.
> For instance, if a, b, and c are partition columns, a and b belong to table1,
> and c belong to table2:
> {code}
> (a,b,c) IN ((1,2,3),(2,3,4)) ->
> (a,b) IN ((1,2),(2,3)) and c in (3,4) and (a,b,c) IN
> ((1,2,3),(2,3,4))
> {code}
> 2) Extending the filter parser of the metastore to support IN clauses,
> including multiple columns. This allows to push those additional predicates
> down throw directSQL to the metastore.
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