Folks, Posting on the dev since this is regarding the new logical plan optimization framework which is not enabled yet. I was interested in playing around with the new optimization framework and try adding some simple rules to it.
I have attached two simple programs which do not work when the new logical optimization framework is enabled (they work when it is disabled). My changes to enable the new optimizer are pretty straightforward and the diff on branch-0.7 are attached (I just set the appropriate property to true). I have attached two very simple scripts both of which raise an exception (in local mode of execution) "java.io.IOException: Type mismatch in key from map: expected org.apache.pig.impl.io.NullableIntWritable, recieved org.apache.pig.impl.io.NullableBytesWritable" if there is atleast 1 row to be output. The error goes away if I replace "DUMP" with "EXPLAIN" (presumably because the bug manifests during plan execution). It would be great if someone could throw some light on this issue or give pointers on workarounds or ways to fix this. I have not filed a JIRA for the above, please let me know if I should. Also, it would be great to get some guidance on the state of the new optimizer wrt testing (I do understand it is not GA ready since it is disabled by default) and whether it is too early to start playing around with adding new rules. Thanks Swati
