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This changes generate-schema-statements.py to produce separate SQL files for different file formats for Hive. This changes load-data.py to go parallel on these separate Hive SQL files. For correctness, the text version of all tables must be loaded before any of the other file formats. load-data.py runs DDLs to create the tables in Impala and goes parallel. Currently, there are some minor dependencies so that text tables must be created prior to creating the other table formats. This changes the definitions of some tables in testdata/datasets/functional/functional_schema_template.sql to remove these dependencies. Now, the DDLs for the text tables can run in parallel to the other file formats. To unify the parallelism for Impala and Hive, load-data.py now uses a single fixed-size pool of processes to run all SQL files rather than spawning a thread per SQL file. This also modifies the locations that do invalidate to use refresh where possible and eliminate global invalidates. For debuggability, different SQL executions output to different log files rather than to standard out. If an error occurs, this will point out the relevant log file. This saves about 10-15 minutes on dataload (including for GVO). Change-Id: I34b71e6df3c8f23a5a31451280e35f4dc015a2fd Reviewed-on: http://gerrit.cloudera.org:8080/8894 Reviewed-by: Joe McDonnell <joemcdonnell@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>