Aihua Xu created HIVE-12762:
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Summary: 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
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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