| # |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| |
| from subprocess import check_output |
| |
| class Engine(object): |
| |
| def __init__(self,db,conf, pipeline): |
| self._db = db |
| self._pipeline = pipeline |
| |
| def query(self,query,output_file=None, delimiter=','): |
| hive_config = "set mapred.max.split.size=1073741824;set hive.exec.reducers.max=10;set hive.cli.print.header=true;" |
| |
| del_format = "| sed 's/[\t]/{0}/g'".format(delimiter) |
| if output_file: |
| hive_cmd = "hive -S -e \"{0} {1}\" {2} | sed '/INFO\|WARNING\|DEBUG/d' > {3}".format(hive_config,query,del_format,output_file) |
| else: |
| hive_cmd = "hive -S -e \"{0} {1}\"".format(hive_config,query) |
| |
| check_output(hive_cmd,shell=True) |
