Description
This issue started after we added a new flatten on map feature at PIG-5085.
For script like
B = foreach A GENERATE FLATTEN(map1), FLATTEN(map2);
it fails with
Caused by: java.lang.ClassCastException: java.util.HashMap cannot be cast to org.apache.pig.data.DataBag at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:514) at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNextTuple(POForEach.java:233) ... 12 more