describe interfiers with name resolution
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Key: PIG-379
URL: https://issues.apache.org/jira/browse/PIG-379
Project: Pig
Issue Type: Bug
Affects Versions: types_branch
Reporter: Olga Natkovich
Fix For: types_branch
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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