[PIG-2850] Pig should support loading macro files as resources stored in JAR files

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.11
• Assignee: Matthew Hayes
• Reporter: Matthew Hayes
• Created: 30/Jul/12 22:25
• Updated: 22/Feb/13 04:53
• Resolved: 24/Aug/12 02:57

Description

A file containing macros can be imported in pig like so:

IMPORT 'some_path/my_macros.pig';

It would be convenient if a macro file could be imported from a registered JAR as well. This would make it easier to distribute them. One could package a set of UDFs and macros in a single JAR. Once the JAR is registered any of the UDFs or macros can be used once.

For example, support that some_path/my_macros.pig has been packaged in a JAR named my_macros.jar. The above code then becomes

REGISTER my_macros.jar;
IMPORT 'some_path/my_macros.pig';

Pig would first check if the file is found at the path some_path/my_macros.pig, and failing that it would attempt to load a resource by that name. Since the JAR is registered it will find it.

Issue Links

• breaks: PIG-2896 Pig does not fail anymore if two macros are declared with the same name