Takuya Ueshin created SPARK-2431:
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Summary: 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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