I don't see this formally documented anywhere, so I thought I'd give a heads-up to folks using Pig with Cassandra.
In pre-1.2.10 versions, storing data into Cassandra required a query like this:
STORE data INTO 'cql://keyspace/table?output_query=update table set some_value @ #' USING CqlStorage();
In 1.2.10, the expansion of the "@" and "#" characters has been removed, and the query is now expected to be URL encoded. The above query would become:
STORE data INTO 'cql://keyspace/table?output_query=update+table+set+some_value+%3D+%3F' USING CqlStorage();
I've also found that you can't store Pig ints into Cassandra bigints any more - you have to cast it to a long in your Pig script.
I've opened JIRAs for these issues: