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https://issues.apache.org/jira/browse/PIG-379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alan Gates updated PIG-379:
---------------------------
Attachment: PIG-379.patch
Changed describe to not call the optimizer. There's no good reason for it to,
and all the moving around of operators in the optimizer was causing problems
for describe.
> describe interfiers with name resolution
> ----------------------------------------
>
> Key: PIG-379
> URL: https://issues.apache.org/jira/browse/PIG-379
> Project: Pig
> Issue Type: Bug
> Affects Versions: types_branch
> Reporter: Olga Natkovich
> Assignee: Alan Gates
> Priority: Critical
> Fix For: types_branch
>
> Attachments: PIG-379.patch
>
>
> If I ran the following script:
> A = load 'studenttab10k' as (name: chararray, age: int, gpa: float);
> B = foreach A generate name, age;
> describe B;
> C = filter B by age > 30;
> describe C;
> D = group C by name;
> describe D;
> I get the error below. Also notice that the schema of C no longer have names:
> {name: chararray,age: integer}
> {chararray,integer}
> java.io.IOException: Invalid alias: name in {chararray,integer}
> at org.apache.pig.PigServer.registerQuery(PigServer.java:254)
> at
> org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:422)
> at
> org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:241)
> at
> org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:82)
> at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:64)
> at org.apache.pig.Main.main(Main.java:302)
> Caused by: org.apache.pig.impl.logicalLayer.parser.ParseException: Invalid
> alias: name in {chararray,integer}
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.AliasFieldOrSpec(QueryParser.java:5179)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.ColOrSpec(QueryParser.java:5048)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseEvalSpec(QueryParser.java:3357)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.UnaryExpr(QueryParser.java:3254)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.CastExpr(QueryParser.java:3208)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.MultiplicativeExpr(QueryParser.java:3117)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.AdditiveExpr(QueryParser.java:3043)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.InfixExpr(QueryParser.java:3009)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.FlattenedGenerateItem(QueryParser.java:2911)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.GroupItem(QueryParser.java:1548)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.CogroupClause(QueryParser.java:1468)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.BaseExpr(QueryParser.java:751)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.Expr(QueryParser.java:569)
> at
> org.apache.pig.impl.logicalLayer.parser.QueryParser.Parse(QueryParser.java:378)
> at
> org.apache.pig.impl.logicalLayer.LogicalPlanBuilder.parse(LogicalPlanBuilder.java:60)
> at org.apache.pig.PigServer.registerQuery(PigServer.java:251)
> If I remove describe, I don't see any errors
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