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From "Pradeep Kamath (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-451) If an filed is part of group followed by flatten, then referring to it causes a parse error
Date Tue, 23 Sep 2008 20:21:44 GMT
If an filed is part of group followed by flatten, then referring to it causes a parse error
-------------------------------------------------------------------------------------------

                 Key: PIG-451
                 URL: https://issues.apache.org/jira/browse/PIG-451
             Project: Pig
          Issue Type: Bug
    Affects Versions: types_branch
            Reporter: Pradeep Kamath
            Assignee: Pradeep Kamath
             Fix For: types_branch


Script which causes error:
{code}
a = load 'st10k' as (name, age, gpa);
b = group a by name;
c = foreach b generate flatten(a);
d = filter c by name eq 'fred';
e = group d by name;
f = foreach e generate flatten(d);
g = foreach f generate name;
{code}

Error got:
{noformat}
java.io.IOException: Found more than one match: a::name, d::a::name
        at org.apache.pig.PigServer.parseQuery(PigServer.java:293)
        at org.apache.pig.PigServer.registerQuery(PigServer.java:258)
        at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:432)
        at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:242)
        at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:83)
        at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
        at org.apache.pig.Main.main(Main.java:306)
Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Found more than one match:
a::name, d::a::name
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5854)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5709)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:4012)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3909)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3863)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3772)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3698)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3664)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3590)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3500)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3457)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2933)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2336)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:973)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:748)
        at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:549)
        at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
        at org.apache.pig.PigServer.parseQuery(PigServer.java:290)
        ... 6 more

{noformat}

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