[PIG-1318] [Zebra] Invalid type for source_table field when using order-preserving Sorted Table Union

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.7.0
• Fix Version/s: 0.7.0
• Component/s: impl
• Assignee: Unassigned
• Reporter: Gaurav Jain
• Created: 22/Mar/10 20:28
• Updated: 14/May/10 06:47
• Resolved: 23/Mar/10 23:44

Description

When we are trying to use order-preserving sorted union:
....

We got the following schema, where the type of 'source_table' is (null) with no column name:

{id: chararray,name: chararray,context: chararray,writer: chararray,rev: chararray,schema: chararray,(null)}

I tried to project the 'source_table' field but failed:

B = FOREACH A GENERATE id, $6;
DUMP B;

But then we got exception org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1066: Unable to open iterator for alias B.

Can you guys please let us know how to access this column? Or is the symptom described above is a bug?