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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2017/02/24 06:18:44 UTC
[jira] [Commented] (SPARK-17075) Cardinality Estimation of
Predicate Expressions
[ https://issues.apache.org/jira/browse/SPARK-17075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15882043#comment-15882043 ]
Apache Spark commented on SPARK-17075:
--------------------------------------
User 'lins05' has created a pull request for this issue:
https://github.com/apache/spark/pull/17051
> 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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