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https://issues.apache.org/jira/browse/SPARK-2431?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust resolved SPARK-2431.
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Resolution: Fixed
Fix Version/s: 1.0.2
1.1.0
Assignee: Takuya Ueshin
> 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
> Assignee: Takuya Ueshin
> Fix For: 1.1.0, 1.0.2
>
>
> 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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