[PIG-2378] macros don't accept references to items within tuples as arguments

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.9.1
• Assignee: Johnny Zhang
• Reporter: Joseph Adler
• Created: 16/Nov/11 21:55
• Updated: 20/May/13 13:44

Description

I'd like to be able to pass a reference to an item within a parameter to a Pig Macro.

For example, suppose that I had a relation A with the schema A:

{id:long, header:(time:long, type:chararray)}

. I'd like to call a macro by typing:

B = MY_MACRO(A, header.time);

but this does not currently work. Obviously, I could define a new relation as a workaround, for example I could use some pig code like

AA = FOREACH a GENERATE *, header.time as time;
B = MY_MACRO(AA, time);

But that's ugly and clunky