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https://issues.apache.org/jira/browse/SPARK-17075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16181784#comment-16181784
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Apache Spark commented on SPARK-17075:
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User 'ron8hu' has created a pull request for this issue:
https://github.com/apache/spark/pull/19357
> Cardinality Estimation of Predicate Expressions
> -----------------------------------------------
>
> Key: SPARK-17075
> URL: https://issues.apache.org/jira/browse/SPARK-17075
> Project: Spark
> Issue Type: Sub-task
> Components: Optimizer
> Affects Versions: 2.0.0
> Reporter: Ron Hu
> Assignee: Ron Hu
> Fix For: 2.2.0
>
>
> A filter condition is the predicate expression specified in the WHERE clause
> of a SQL select statement. A predicate can be a compound logical expression
> with logical AND, OR, NOT operators combining multiple single conditions. A
> single condition usually has comparison operators such as =, <, <=, >, >=,
> ‘like’, etc.
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