try {
if (getConfiguration().getProperty("pig.usenewlogicalplan", "true").equals("true")) {
log.info("pig.usenewlogicalplan is set to true. New logical plan will be used.");
// translate old logical plan to new plan
LogicalPlanMigrationVistor visitor = new LogicalPlanMigrationVistor(plan);
visitor.visit();
org.apache.pig.newplan.logical.relational.LogicalPlan newPlan = visitor.getNewLogicalPlan();
SchemaResetter schemaResetter = new SchemaResetter(newPlan);
schemaResetter.visit();
HashSet<String> optimizerRules = null;