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Takuya Ueshin commented on SPARK-2509: -------------------------------------- PRed: https://github.com/apache/spark/pull/1428 > Add optimization for Substring. > ------------------------------- > > Key: SPARK-2509 > URL: https://issues.apache.org/jira/browse/SPARK-2509 > Project: Spark > Issue Type: Improvement > Components: SQL > Reporter: Takuya Ueshin > > {{Substring}} including {{null}} literal cases could be added to > {{NullPropagation}}. -- This message was sent by Atlassian JIRA (v6.2#6252)