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https://issues.apache.org/jira/browse/SPARK-10442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14741550#comment-14741550
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Yin Huai commented on SPARK-10442:
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We need to document this behavior change in our release note. The new behavior
is that casting a string to a boolean will return true for 't' 'true' 'y' 'yes'
'1', false for 'f' 'false' 'n' 'no' '0' and null for others. The matching of
those literals are case in-sensitive.
> select cast('false' as boolean) returns true
> --------------------------------------------
>
> Key: SPARK-10442
> URL: https://issues.apache.org/jira/browse/SPARK-10442
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Yin Huai
> Priority: Critical
> Labels: release_notes, releasenotes
> Fix For: 1.6.0
>
>
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