[jira] [Assigned] (SPARK-19555) Improve inefficient StringUtils.escapeLikeRegex() method
[ https://issues.apache.org/jira/browse/SPARK-19555?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Apache Spark reassigned SPARK-19555: Assignee: Apache Spark > Improve inefficient StringUtils.escapeLikeRegex() method > > > Key: SPARK-19555 > URL: https://issues.apache.org/jira/browse/SPARK-19555 > Project: Spark > Issue Type: Improvement > Components: SQL >Affects Versions: 2.0.0 >Reporter: Josh Rosen >Assignee: Apache Spark > > Spark's StringUtils.escapeLikeRegex() method is written inefficiently, > performing tons of object allocations due to the use zip(), flatMap() , and > mkString. Instead, I think method should be rewritten in an imperative style > using a Java string builder. > This method can become a performance bottleneck in cases where regex > expressions are used with non-constant-foldable expressions (e.g. the regex > expression comes from the data rather than being part of the query). > Here's the code in question: > https://github.com/apache/spark/blob/d785217b791882e075ad537852d49d78fc1ca31b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/StringUtils.scala#L28 -- This message was sent by Atlassian JIRA (v6.3.15#6346) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Assigned] (SPARK-19555) Improve inefficient StringUtils.escapeLikeRegex() method
[ https://issues.apache.org/jira/browse/SPARK-19555?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Apache Spark reassigned SPARK-19555: Assignee: (was: Apache Spark) > Improve inefficient StringUtils.escapeLikeRegex() method > > > Key: SPARK-19555 > URL: https://issues.apache.org/jira/browse/SPARK-19555 > Project: Spark > Issue Type: Improvement > Components: SQL >Affects Versions: 2.0.0 >Reporter: Josh Rosen > > Spark's StringUtils.escapeLikeRegex() method is written inefficiently, > performing tons of object allocations due to the use zip(), flatMap() , and > mkString. Instead, I think method should be rewritten in an imperative style > using a Java string builder. > This method can become a performance bottleneck in cases where regex > expressions are used with non-constant-foldable expressions (e.g. the regex > expression comes from the data rather than being part of the query). > Here's the code in question: > https://github.com/apache/spark/blob/d785217b791882e075ad537852d49d78fc1ca31b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/StringUtils.scala#L28 -- This message was sent by Atlassian JIRA (v6.3.15#6346) - To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org
