[PIG-438] Handle realiasing of existing Alias (A=B;)

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.2.0
• Fix Version/s: 0.10.0, 0.11
• Hadoop Flags: Reviewed
• Assignee: Jonathan Coveney
• Reporter: Pradeep Kamath
• Created: 18/Sep/08 21:49
• Updated: 26/Apr/12 20:32
• Resolved: 16/Mar/12 23:46

Description

We do not handle re-aliasing of an existing alias - this should be handled correctly.

The following script should work:

a = load 'studenttab10k';
b = filter a by $1 > '25';
c = b;

-- use b
d = cogroup b by $0, a by $0;
e = foreach d generate flatten(b), flatten(a);
dump e

-- use c
f = cogroup c by $0, a by $0;
g = foreach f generate flatten(c), flatten(a);
dump g;