bincond can't work with flatten bags
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Key: PIG-538
URL: https://issues.apache.org/jira/browse/PIG-538
Project: Pig
Issue Type: Bug
Affects Versions: types_branch
Reporter: Olga Natkovich
Assignee: Santhosh Srinivasan
Fix For: types_branch
The following script is user with trunk code to simulated outer join not
directly supported by pig:
A = load '/studenttab10k' as (name: chararray, age: int, gpa: float);
B = load 'votertab10k' as (name: chararray, age: int, registration: chararray,
donation: float);
C = cogroup A by name, B by name;
D = foreach C generate group, (IsEmpty(A) ? '' : flatten(A)), (IsEmpty(B) ?
'null' : flatten(B));
On types branch this gives syntax error and even beyond that not supported
since bincond requires that both expressions be of the same type. Santhosh
suggested to have special NULL expression that matches any type. This seems to
make sense.
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