type checking with order-by following user-defined function
-----------------------------------------------------------
Key: PIG-549
URL: https://issues.apache.org/jira/browse/PIG-549
Project: Pig
Issue Type: Bug
Affects Versions: types_branch
Environment: type checker fails here:
A = load ...;
B = foreach A generate UDF1(*), UDF2();
C = order B by $1;
where UDF2() is of type EvalFunc<Integer>.
I tried all sorts of things, including overriding outputSchema() of the UDF to
specify Integer, and also adding "as x : int" to the foreach command -- in all
cases I get the same error.
Reporter: Christopher Olston
Fix For: types_branch
Exception in thread "main" java.lang.AssertionError: Unsupported root type in
LOForEach:LOUserFunc
at
org.apache.pig.impl.logicalLayer.validators.TypeCheckingVisitor.visit(TypeCheckingVisitor.java:2267)
at org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:121)
at org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:40)
at
org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:68)
at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51)
at
org.apache.pig.impl.plan.PlanValidator.validateSkipCollectException(PlanValidator.java:101)
at
org.apache.pig.impl.logicalLayer.validators.TypeCheckingValidator.validate(TypeCheckingValidator.java:40)
at
org.apache.pig.impl.logicalLayer.validators.TypeCheckingValidator.validate(TypeCheckingValidator.java:30)
at
org.apache.pig.impl.logicalLayer.validators.LogicalPlanValidationExecutor.validate(LogicalPlanValidationExecutor.java:79)
at org.apache.pig.PigServer.compileLp(PigServer.java:684)
at org.apache.pig.PigServer.compileLp(PigServer.java:655)
at org.apache.pig.PigServer.store(PigServer.java:433)
at org.apache.pig.PigServer.store(PigServer.java:421)
at org.apache.pig.PigServer.openIterator(PigServer.java:384)
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