Jesus Camacho Rodriguez created HIVE-15369:
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Summary: Extend column pruner to account for residual filter
expression in Join operator
Key: HIVE-15369
URL: https://issues.apache.org/jira/browse/HIVE-15369
Project: Hive
Issue Type: Bug
Components: Logical Optimizer
Affects Versions: 2.2.0
Reporter: Jesus Camacho Rodriguez
Assignee: Jesus Camacho Rodriguez
Introduced by HIVE-15251.
We need to extend ColumnPruner logic to take into account residual filter
expressions in Join operator. Otherwise, query will fail at execution time.
Issue can be reproduced as follows:
{code:sql}
set hive.strict.checks.cartesian.product=false;
CREATE TABLE test1 (key INT, value INT, col_1 STRING);
INSERT INTO test1 VALUES (NULL, NULL, 'None'), (98, NULL, 'None'),
(99, 0, 'Alice'), (99, 2, 'Mat'), (100, 1, 'Bob'), (101, 2, 'Car');
CREATE TABLE test2 (key INT, value INT, col_2 STRING);
INSERT INTO test2 VALUES (102, 2, 'Del'), (103, 2, 'Ema'),
(104, 3, 'Fli'), (105, NULL, 'None');
-- Complex condition and column projection
EXPLAIN
SELECT col_1, col_2
FROM test1 LEFT OUTER JOIN test2
ON (test1.value=test2.value
OR test1.key=test2.key);
SELECT col_1, col_2
FROM test1 LEFT OUTER JOIN test2
ON (test1.value=test2.value
OR test1.key=test2.key);
{code}
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