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Daniel Dai commented on PIG-2597: --------------------------------- [~kyunghoj], besides "register" and "parameter substitution" PIG-3359 addresses, grunt shell commands does not support. Also the implementation of PIG-3359 is more a walk around. It is better to refactor it to fully integrate the "register" command into QueryParser. > Move grunt from javacc to ANTRL > ------------------------------- > > Key: PIG-2597 > URL: https://issues.apache.org/jira/browse/PIG-2597 > Project: Pig > Issue Type: Improvement > Reporter: Jonathan Coveney > Assignee: Daniel Dai > Labels: gsoc2014 > Attachments: pig02.diff > > > Currently, the parser for queries is in ANTLR, but Grunt is still javacc. The > parser is very difficult to work with, and next to impossible to understand > or modify. ANTLR provides a much cleaner, more standard way to generate > parsers/lexers/ASTs/etc, and moving from javacc to Grunt would be huge as we > continue to add features to Pig. > This is a candidate project for Google summer of code 2014. More information > about the program can be found at > https://cwiki.apache.org/confluence/display/PIG/GSoc2014 -- This message was sent by Atlassian JIRA (v6.2#6252)