Mailing-List: contact dev-help@pig.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@pig.apache.org
Received-SPF: pass (athena.apache.org: domain of jcoveney@gmail.com designates
 209.85.214.177 as permitted sender)
Received-SPF: pass (google.com: domain of jcoveney@gmail.com designates
 10.60.4.202 as permitted sender) client-ip=10.60.4.202;
MIME-Version: 1.0
Date: Wed, 29 Feb 2012 17:47:42 -0800
Message-ID: 
 <CAKne9Z7=90wi4fQuBSytgxNXpG5kxeSG_N5Tb=hv9OUtJTH+sA@mail.gmail.com>
Subject: Better map support?
From: Jonathan Coveney <jcoveney@gmail.com>
To: dev@pig.apache.org, user@pig.apache.org
Content-Type: multipart/alternative; boundary=e89a8ff1c7d65c038f04ba24a53f

--e89a8ff1c7d65c038f04ba24a53f
Content-Type: text/plain; charset=UTF-8

Hey all! In the last couple of weeks I've found myself wanting for better
map support in pig. I'd be willing to do the work, just wanted to get a
sense of what people thought might be useful. And maybe some of this exists!

TOBAG - given a Map, outputs {(key,value)}
KEYSET - returns {(key)} where it is unique
VALUESET - returns {(value)} where it is unique
CONCAT - takes some number of Maps, and merges them together. The first
one's values will override the rest. Or the latest one will. Whatevs.

Not sure what else would be useful. I'm including user@ on this because I'd
love to hear any map manipulation features you crave. Maps, up to know,
have been pretty 2nd class and I'd love to help change that.

Jon

--e89a8ff1c7d65c038f04ba24a53f--