Bill Graham created PIG-2905:
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Summary: Improve documentation around REPLACE
Key: PIG-2905
URL: https://issues.apache.org/jira/browse/PIG-2905
Project: Pig
Issue Type: Sub-task
Reporter: Bill Graham
Document how REPLACE uses a Java regex and link out to JDK docs describing
reserved characters and escaping. From recent confusion on the users list:
{noformat}
> String source = "[02/Aug/2012:05:01:17";
> > String target ="[";
> > String replaceWith = "";
> > return source.replaceAll(source, target, replaceWith);
> Note that Java String.replaceAll() takes a regular expression for the 2nd
> parameter (i.e. target), and "[" is a special character. To use it as is,
> you have to escape it, so in your Pig script, you should do:
> REPLACE(date,'\\[','')
{noformat}
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