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0bae3978c9
Updates our compute stats script to execute using Impala. This allows us to easily compute stats on all tables in a database or all tables in the metastore. The updated stats caused one of the TPCH plans to change so this also updates the TPCH planner test results. Change-Id: I17e5dcd1036a35e40eb4eb2c8e4a20702db9049c Reviewed-on: http://gerrit.ent.cloudera.com:8080/1024 Reviewed-by: Lenni Kuff <lskuff@cloudera.com> Tested-by: jenkins
87 lines
4.0 KiB
Python
Executable File
87 lines
4.0 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright (c) 2012 Cloudera, Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# Utility for computing table statistics of tables in the Hive Metastore
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import sys
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from optparse import OptionParser
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from tests.beeswax.impala_beeswax import *
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def compute_stats(impala_client, db_names=None, table_names=None,
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continue_on_error=False):
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"""
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Runs COMPUTE STATS over the selected tables. The target tables can be filtered by
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specifying a list of databases and/or table names. If no filters are specified this will
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run COMPUTE STATS on all tables in all databases.
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"""
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print "Enumerating databases and tables for compute stats."
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all_dbs = set(name.lower() for name in impala_client.execute("show databases").data)
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selected_dbs = all_dbs if db_names is None else set(db_names)
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if db_names is not None:
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print 'Skipping compute stats on databases:\n%s' % '\n'.join(all_dbs - selected_dbs)
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for db in all_dbs.intersection(selected_dbs):
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all_tables =\
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set([t.lower() for t in impala_client.execute("show tables in %s" % db).data])
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selected_tables = all_tables if table_names is None else set(table_names)
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if table_names:
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print 'Skipping compute stats on tables:\n%s' %\
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'\n'.join(['%s.%s' % (db, tbl) for tbl in all_tables - selected_tables])
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for table in all_tables.intersection(selected_tables):
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statement = "compute stats %s.%s" % (db, table)
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print 'Executing: %s' % statement
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try:
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result = impala_client.execute(statement)
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print " -> %s\n" % '\n'.join(result.data)
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except Exception, e:
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print " -> Error: %s\n" % str(e)
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if not continue_on_error: raise e
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if __name__ == "__main__":
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parser = OptionParser()
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parser.add_option("--continue_on_error", dest="continue_on_error",
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action="store_true", default=True, help="If True, continue "\
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"if there is an error executing the compute stats statement.")
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parser.add_option("--impalad", dest="impalad", default="localhost:21000",
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help="Impala daemon <host:port> to connect to.")
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parser.add_option("--use_kerberos", action="store_true", default=False,
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help="Compute stats on a kerberized cluster.")
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parser.add_option("--db_names", dest="db_names", default=None,
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help="Comma-separated list of database names for which to compute "\
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"stats. Can be used in conjunction with the --table_names flag. "\
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"If not specified, compute stats will run on tables from all "\
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"databases.")
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parser.add_option("--table_names", dest="table_names", default=None,
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help="Comma-separated list of table names to compute stats over. A"\
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" substring comparison is done. If no tables are specified stats "\
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"are computed across all tables.")
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options, args = parser.parse_args()
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table_names = None
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if options.table_names is not None:
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table_names = [name.lower().strip() for name in options.table_names.split(',')]
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db_names = None
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if options.db_names is not None:
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db_names = [name.lower().strip() for name in options.db_names.split(',')]
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impala_client = ImpalaBeeswaxClient(options.impalad, use_kerberos=options.use_kerberos)
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impala_client.connect()
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try:
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compute_stats(impala_client, db_names=db_names,
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table_names=table_names, continue_on_error=options.continue_on_error)
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finally:
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impala_client.close_connection()
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