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https://issues.apache.org/jira/browse/DRILL-3697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14709256#comment-14709256
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Kristine Hahn commented on DRILL-3697:
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Fixed on the staging site:
http://kristinehahn.github.io/drill/docs/string-manipulation/#regexp_replace
Will be fixed on the Apache site next time we publish the docs.
> REGEXP_REPLACE doc. says POSIX reg. expr.; which? not Java?
> -----------------------------------------------------------
>
> Key: DRILL-3697
> URL: https://issues.apache.org/jira/browse/DRILL-3697
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Daniel Barclay (Drill)
> Assignee: Kristine Hahn
>
> The {{REGEXP_REPLACE}} function documentation currently at
> [https://drill.apache.org/docs/string-manipulation/#regexp_replace] says that
> {{REGEXP_REPLACE}} uses POSIX regular expressions.
> Is that true (that Drill using POSIX regular expressions and not Java regular
> expressions)?
> If that's really true, are they BREs or EREs?
> Assuming it's actually Java regular expressions, the documentation should
> probably have a link to some appropriate target in the JDK Java doc (maybe
> http://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html and
> http://docs.oracle.com/javase/8/docs/api/java/util/regex/Matcher.html#replaceAll-java.lang.String-.
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