FileLocalizer.deleteTempFiles();
pig = new PigServer(ExecType.MAPREDUCE, cluster.getProperties());
pc = pig.getPigContext();
st.setStoreImpl(new LocalPOStoreImpl(pc));
proj = GenPhyOp.exprProject();
proj.setColumn(0);
proj.setResultType(DataType.TUPLE);
proj.setOverloaded(true);