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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/19165/
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Review request for hive and Gunther Hagleitner.
Bugs: HIVE-6643
https://issues.apache.org/jira/browse/HIVE-6643
Repository: hive-git
Description
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Now that we support old style join syntax, it is easy to write queries that
generate a plan with a cross product.
For e.g. say you have A join B join C join D on A.x = B.x and A.y = D.y and C.z
= D.z
So the JoinTree is:
A — B
__ D — C
Since we don't reorder join graphs, we will end up with a cross product between
(A join B) and C
Diffs
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itests/qtest/pom.xml f8b81a2
ql/src/java/org/apache/hadoop/hive/ql/optimizer/physical/CrossProductCheck.java
PRE-CREATION
ql/src/java/org/apache/hadoop/hive/ql/optimizer/physical/PhysicalOptimizer.java
d593d08
ql/src/java/org/apache/hadoop/hive/ql/parse/TezCompiler.java a5e6cbf
ql/src/test/queries/clientpositive/cross_product_check_1.q PRE-CREATION
ql/src/test/queries/clientpositive/cross_product_check_2.q PRE-CREATION
ql/src/test/results/clientpositive/cross_product_check_1.q.out PRE-CREATION
ql/src/test/results/clientpositive/cross_product_check_2.q.out PRE-CREATION
ql/src/test/results/clientpositive/tez/cross_product_check_1.q.out
PRE-CREATION
ql/src/test/results/clientpositive/tez/cross_product_check_2.q.out
PRE-CREATION
Diff: https://reviews.apache.org/r/19165/diff/
Testing
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added new tests
Thanks,
Harish Butani
