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https://issues.apache.org/jira/browse/HIVE-15680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16341987#comment-16341987
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Anthony Hsu commented on HIVE-15680:
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[~prasanth_j], [~niklaus.xiao]: thanks for the comments on the review. You guys
are right – there seem to be correctness bugs in my patch; I think
[~prasanth_j]'s patch to disable pushing filters for MR is the better approach
for now. Thanks for fixing, [~prasanth_j]!
> Incorrect results when hive.optimize.index.filter=true and same ORC table is
> referenced twice in query
> ------------------------------------------------------------------------------------------------------
>
> Key: HIVE-15680
> URL: https://issues.apache.org/jira/browse/HIVE-15680
> Project: Hive
> Issue Type: Bug
> Affects Versions: 1.1.0, 2.2.0
> Reporter: Anthony Hsu
> Assignee: Anthony Hsu
> Priority: Major
> Fix For: 3.0.0, 2.4.0
>
> Attachments: HIVE-15680.1.patch, HIVE-15680.2.patch,
> HIVE-15680.3.patch, HIVE-15680.4.patch, HIVE-15680.5.patch,
> HIVE-15680.6.patch, HIVE-15680.7.patch
>
>
> To repro:
> {noformat}
> set hive.optimize.index.filter=true;
> create table test_table(number int) stored as ORC;
> -- Two insertions will create two files, with one stripe each
> insert into table test_table VALUES (1);
> insert into table test_table VALUES (2);
> -- This should and does return 2 records
> select * from test_table;
> -- These should and do each return 1 record
> select * from test_table where number = 1;
> select * from test_table where number = 2;
> -- This should return 2 records but only returns 1 record
> select * from test_table where number = 1
> union all
> select * from test_table where number = 2;
> {noformat}
> What's happening is only the last predicate is being pushed down.
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