[jira] Assigned: (PIG-730) problem combining schema from a union of several LOAD expressions, with a nested bag inside the schema.

["Alan Gates (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-730?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alan Gates reassigned PIG-730:
------------------------------

    Assignee: Daniel Dai  (was: Alan Gates)

> problem combining schema from a union of several LOAD expressions, with a nested bag inside the schema.
> -------------------------------------------------------------------------------------------------------
>
>                 Key: PIG-730
>                 URL: https://issues.apache.org/jira/browse/PIG-730
>             Project: Pig
>          Issue Type: Bug
>         Environment: pig local mode
>            Reporter: Christopher Olston
>            Assignee: Daniel Dai
>             Fix For: 0.9.0
>
>
> grunt> a = load 'foo' using BinStorage as (url:chararray,outlinks:{t:(target:chararray,text:chararray)});
> grunt> b = union (load 'foo' using BinStorage as (url:chararray,outlinks:{t:(target:chararray,text:chararray)})), (load 'bar' using BinStorage as (url:chararray,outlinks:{t:(target:chararray,text:chararray)}));
> grunt> c = foreach a generate flatten(outlinks.target);
> grunt> d = foreach b generate flatten(outlinks.target);
> ---> Would expect both C and D to work, but only C works. D gives the error shown below.
> ---> Turns out using outlinks.t.target (instead of outlinks.target) works for D but not for C.
> ---> I don't care which one, but the same syntax should work for both!
> 2009-03-24 13:15:05,376 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1000: Error during parsing. Invalid alias: target in {t: (target: chararray,text: chararray)}
> Details at logfile: /echo/olston/data/pig_1237925683748.log
> grunt> quit
> $ cat pig_1237925683748.log 
> ERROR 1000: Error during parsing. Invalid alias: target in {t: (target: chararray,text: chararray)}
> org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1000: Error during parsing. Invalid alias: target in {t: (target: chararray,text: chararray)}
>         at org.apache.pig.PigServer.parseQuery(PigServer.java:317)
>         at org.apache.pig.PigServer.registerQuery(PigServer.java:276)
>         at org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:529)
>         at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:280)
>         at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:99)
>         at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:69)
>         at org.apache.pig.Main.main(Main.java:321)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid alias: target in {t: (target: chararray,text: chararray)}
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:6042)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5898)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.BracketedSimpleProj(QueryParser.java:5423)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:4100)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3967)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3920)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3829)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3755)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3721)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:3617)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemList(QueryParser.java:3557)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryParser.java:3514)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.java:2985)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParser.java:2395)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:1028)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:804)
>         at org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:595)
>         at org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
>         at org.apache.pig.PigServer.parseQuery(PigServer.java:310)
>         ... 6 more

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