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From "Takuya Ueshin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-2431) Refine StringComparison and related codes.
Date Thu, 10 Jul 2014 16:28:04 GMT

    [ https://issues.apache.org/jira/browse/SPARK-2431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14057640#comment-14057640
] 

Takuya Ueshin commented on SPARK-2431:
--------------------------------------

PRed: https://github.com/apache/spark/pull/1357

> Refine StringComparison and related codes.
> ------------------------------------------
>
>                 Key: SPARK-2431
>                 URL: https://issues.apache.org/jira/browse/SPARK-2431
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Takuya Ueshin
>
> Refine {{StringComparison}} and related codes as follows:
> - {{StringComparison}} could be similar to {{StringRegexExpression}} or {{CaseConversionExpression}}.
> - Nullability of {{StringRegexExpression}} could depend on children's nullabilities.
> - Add a case that the like condition includes no wildcard to {{LikeSimplification}}.



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