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https://issues.apache.org/jira/browse/SPARK-12314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15055344#comment-15055344
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Hyukjin Kwon commented on SPARK-12314:
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I will work on this.
> isnull operator not pushed down for JDBC datasource.
> ----------------------------------------------------
>
> Key: SPARK-12314
> URL: https://issues.apache.org/jira/browse/SPARK-12314
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.6.0
> Reporter: Hyukjin Kwon
>
> {{IsNull}} filter is not being pushed down for JDBC datasource.
> It looks it is SQL standard according to SQL-92, SQL:1999, SQL:2003, SQL:201x
> and I believe most databases support this.
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