https://community.cloudera.com/t5/Support-Questions/mismatched-input-AS-expecting-RIGHT-PAREN-in-Pig/m-p/191399#M153484 <A rel="user" href="https://community.cloudera.com/users/17036/priyal.html" nodeid="17036">@priyal patel</A><P>Your statement has a syntax issue and that is why you are getting the current error. So if you retype your pig script as follows, you won't have the syntax error.</P><PRE>extract = FOREACH a GENERATE FLATTEN(REGEX_EXTRACT_ALL(rec,'^(Mapped)\\"(\\{+(\\[+([^/].*)+\\]),methods=(\\[+([A-Z].*)+\\]),produces=(\\[+([^ ].*)+\\])+\\}\\)"\\s+(\\S+)\\s+(\\S+)\\s+(\\S+)\\s+(throws)\\s+(.*)')) AS (t1:chararray,url:chararray,type:chararray,produces:chararray,t2:chararray,t3:chararray,classes:chararray,throw:chararray,exception:chararray);</PRE><P>Now, your regex is as is as you mentioned in the question. I need some more info regarding what you want to fetch out of this error message. And then we can work on the desired regex.</P> Fri, 23 Mar 2018 01:54:32 GMT RahulSoni 2018-03-23T01:54:32Z