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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1462) No informative error message on parse problem
Date Wed, 23 Jun 2010 05:20:49 GMT

    [ https://issues.apache.org/jira/browse/PIG-1462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12881550#action_12881550
] 

Ashutosh Chauhan commented on PIG-1462:
---------------------------------------

This has come up before. As noted on PIG-798 correct way to achieve this is
{code}
grunt> in = load 'data' using PigStorage() as (m:map[]);                 
grunt> tags = foreach in generate (tuple(chararray)) m#'k1' as tagtuple;              
     
grunt> dump tags;

{code}
 
We probably need to add a note about casting in cookbook. Also, need to generate better error
message.

> No informative error message on parse problem
> ---------------------------------------------
>
>                 Key: PIG-1462
>                 URL: https://issues.apache.org/jira/browse/PIG-1462
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.7.0
>            Reporter: Ankur
>
> Consider the following script
> in = load 'data' using PigStorage() as (m:map[]);
> tags = foreach in generate m#'k1' as (tagtuple: tuple(chararray));
> dump tags;
> This throws the following error message that does not really say that this is a bad declaration
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1000: Error during parsing.
Encountered "" at line 2, column 38.
> Was expecting one of:
>     
> 	at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1170)
> 	at org.apache.pig.PigServer$Graph.registerQuery(PigServer.java:1114)
> 	at org.apache.pig.PigServer.registerQuery(PigServer.java:425)
> 	at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:737)
> 	at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:324)
> 	at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:162)
> 	at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:138)
> 	at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:89)
> 	at org.apache.pig.Main.main(Main.java:391)

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