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Dataload currently executes bin/load-data.py for TPC-H, TPC-DS, and functional-query concurrently. One of the final steps for bin/load-data.py is to run a global "invalidate metadata". Global "invalidate metadata" commands are known to cause problem on concurrent systems. See IMPALA-5087. For dataload, if TPC-H executes "invalidate metadata" while TPC-DS is still creating tables and adding partitions, the TPC-DS executor might erroneously believe that a table does not exist. This changes dataload to invalidate metadata at an individual table level rather than globally. This prevents the concurrency issue. This also changes the names of some of the intermediate SQL files generated by generate-schema-statements.py and consumed by load-data.py to make them less confusing. Change-Id: Ibc3a6d8a674a0bf6b02069bfe8a5e12034335b1f Reviewed-on: http://gerrit.cloudera.org:8080/9009 Reviewed-by: Joe McDonnell <joemcdonnell@cloudera.com> Tested-by: Impala Public Jenkins