[
https://issues.apache.org/jira/browse/SPARK-30759?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Maxim Gekk updated SPARK-30759:
-------------------------------
Priority: Minor (was: Major)
> The cache in StringRegexExpression is not initialized for foldable patterns
> ---------------------------------------------------------------------------
>
> Key: SPARK-30759
> URL: https://issues.apache.org/jira/browse/SPARK-30759
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.5, 3.0.0
> Reporter: Maxim Gekk
> Priority: Minor
> Attachments: Screen Shot 2020-02-08 at 22.45.50.png
>
>
> In the case of foldable patterns, the cache in StringRegexExpression should
> be evaluated once but in fact it is compiled every time. Here is the example:
> {code:sql}
> SELECT '%SystemDrive%\Users\John' _FUNC_ '%SystemDrive%\\Users.*';
> {code}
> the code
> https://github.com/apache/spark/blob/8aebc80e0e67bcb1aa300b8c8b1a209159237632/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala#L45-L48:
> {code:scala}
> // try cache the pattern for Literal
> private lazy val cache: Pattern = pattern match {
> case Literal(value: String, StringType) => compile(value)
> case _ => null
> }
> {code}
> The attached screenshot shows that foldable expression doesn't fall to the
> first case.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
