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https://issues.apache.org/jira/browse/SPARK-17821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15553942#comment-15553942
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Apache Spark commented on SPARK-17821:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/15388
> Expression Canonicalization should support Add and Or
> -----------------------------------------------------
>
> Key: SPARK-17821
> URL: https://issues.apache.org/jira/browse/SPARK-17821
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Liang-Chi Hsieh
>
> Currently {{Canonicalize}} object doesn't support {{And}} and {{Or}}. So we
> can compare canonicalized form of predicates consistently. We should add the
> support.
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