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https://issues.apache.org/jira/browse/HIVE-12762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15088123#comment-15088123
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Sergio Peña commented on HIVE-12762:
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[~aihuaxu] The patch looks good to me.
+1
> Common join on parquet tables returns incorrect result when
> hive.optimize.index.filter set to true
> --------------------------------------------------------------------------------------------------
>
> Key: HIVE-12762
> URL: https://issues.apache.org/jira/browse/HIVE-12762
> Project: Hive
> Issue Type: Bug
> Components: Logical Optimizer
> Affects Versions: 2.1.0
> Reporter: Aihua Xu
> Assignee: Aihua Xu
> Attachments: HIVE-12762.2.patch, HIVE-12762.patch
>
>
> The following query will give incorrect result.
> {noformat}
> CREATE TABLE tbl1(id INT) STORED AS PARQUET;
> INSERT INTO tbl1 VALUES(1), (2);
> CREATE TABLE tbl2(id INT, value STRING) STORED AS PARQUET;
> INSERT INTO tbl2 VALUES(1, 'value1');
> INSERT INTO tbl2 VALUES(1, 'value2');
> set hive.optimize.index.filter = true;
> set hive.auto.convert.join=false;
> select tbl1.id, t1.value, t2.value
> FROM tbl1
> JOIN (SELECT * FROM tbl2 WHERE value='value1') t1 ON tbl1.id=t1.id
> JOIN (SELECT * FROM tbl2 WHERE value='value2') t2 ON tbl1.id=t2.id;
> {noformat}
> We are enforcing to use common join and tbl2 will have 2 files after 2
> insertions underneath.
> the map job contains 3 TableScan operators (2 for tbl2 and 1 for tbl1). When
> hive.optimize.index.filter is set to true, we are incorrectly applying the
> later filtering condition to each block, which causes no data is returned for
> the subquery {{SELECT * FROM tbl2 WHERE value='value1'}}.
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