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From "Olga Natkovich (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-542) pig gets confused about schema, when joining a table that has a known schema with one that doesn't
Date Fri, 09 Jul 2010 19:22:50 GMT

     [ https://issues.apache.org/jira/browse/PIG-542?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Olga Natkovich updated PIG-542:
-------------------------------

    Fix Version/s: 0.9.0

> pig gets confused about schema, when joining a table that has a known schema with one
that doesn't
> --------------------------------------------------------------------------------------------------
>
>                 Key: PIG-542
>                 URL: https://issues.apache.org/jira/browse/PIG-542
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.2.0
>         Environment: types branch, running in local mode
>            Reporter: Christopher Olston
>             Fix For: 0.9.0
>
>
> query:
> A = load '/data/A' using myLoadFunc('...');
> A1 = foreach (group A by ($8)) generate group, COUNT($1);
> B = load '/data/B';
> J = join A1 by $0, B by $0;
> J1 = foreach J generate $0, $1, $3;        <----- crashes on attempt to parse this
line.
> problem:
> It knows the schema of A1 but not of B -- but it seems to think B has only
> one field.
> error message (on parsing J1=... line):
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Out of
> bound access. Trying to access non-existent column: 3. Schema {ID10::group:
> bytearray,long,bytearray} has 3 column(s).
>     at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.DollarVar(QueryParser.ja
> va:5764)
>     at 
> org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.ja
> va:5713)
>     at 
> org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser
> .java:4018)
>     at 
> org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.ja
> va:3915)
>     at 
> org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.jav
> a:3869)
>     at 
> org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(Query
> Parser.java:3778)
>     at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser
> .java:3704)
>     at 
> org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.ja
> va:3670)
>     at 
> org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(Qu
> eryParser.java:3596)
>     at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItemLis
> t(QueryParser.java:3519)
>     at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.GenerateStatement(QueryP
> arser.java:3463)
>     at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.NestedBlock(QueryParser.
> java:2939)
>     at 
> org.apache.pig.impl.logicalLayer.parser.QueryParser.ForEachClause(QueryParse
> r.java:2342)
>     at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.jav
> a:979)
>     at 
> org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:75
> 5)
>     at 
> org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:5
> 50)
>     at 
> org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder
> .java:60)
>     at org.apache.pig.PigServer.parseQuery(PigServer.java:295)
> ... 16 more

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