Mercurial > repos > yufei-luo > s_mart
diff SMART/Java/Python/mySql/MySqlConnection.py @ 6:769e306b7933
Change the repository level.
author | yufei-luo |
---|---|
date | Fri, 18 Jan 2013 04:54:14 -0500 |
parents | |
children | 94ab73e8a190 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SMART/Java/Python/mySql/MySqlConnection.py Fri Jan 18 04:54:14 2013 -0500 @@ -0,0 +1,109 @@ +# +# Copyright INRA-URGI 2009-2010 +# +# This software is governed by the CeCILL license under French law and +# abiding by the rules of distribution of free software. You can use, +# modify and/ or redistribute the software under the terms of the CeCILL +# license as circulated by CEA, CNRS and INRIA at the following URL +# "http://www.cecill.info". +# +# As a counterpart to the access to the source code and rights to copy, +# modify and redistribute granted by the license, users are provided only +# with a limited warranty and the software's author, the holder of the +# economic rights, and the successive licensors have only limited +# liability. +# +# In this respect, the user's attention is drawn to the risks associated +# with loading, using, modifying and/or developing or reproducing the +# software by the user in light of its specific status of free software, +# that may mean that it is complicated to manipulate, and that also +# therefore means that it is reserved for developers and experienced +# professionals having in-depth computer knowledge. Users are therefore +# encouraged to load and test the software's suitability as regards their +# requirements in conditions enabling the security of their systems and/or +# data to be ensured and, more generally, to use and operate it in the +# same conditions as regards security. +# +# The fact that you are presently reading this means that you have had +# knowledge of the CeCILL license and that you accept its terms. +# +#! /usr/bin/env python +import os +import random +import sqlite3 +from SMART.Java.Python.mySql.MySqlQuery import MySqlQuery + + +class MySqlConnection(object): + """Connection to a database""" + + def __init__(self, verbosity = 0): + self.verbosity = verbosity + self.databaseName = "%s%ssmartdb%d" % (os.environ.get("SMARTTMPPATH", "."), os.sep, random.randint(0, 100000)) + self.connection = sqlite3.connect(self.databaseName) + self.executeQuery("PRAGMA journal_mode = OFF") + self.executeQuery("PRAGMA synchronous = 0") + self.executeQuery("PRAGMA locking_mode = EXCLUSIVE") + self.executeQuery("PRAGMA count_change = OFF") + self.executeQuery("PRAGMA temp_store = 2") + + def __del__(self): + self.connection.close() + + + def createDatabase(self): + pass + + + def deleteDatabase(self): + if os.path.exists(self.databaseName): + os.remove(self.databaseName) + + + def executeQuery(self, command, insertion = False): + cursor = self.connection.cursor() + query = MySqlQuery(cursor, self.verbosity) + try: + result = query.execute(command, insertion) + self.connection.commit() + except: + result = query.execute(command, insertion) + self.connection.commit() + if insertion: + return result + else: + return query + + + def executeManyQueries(self, commands): + cursor = self.connection.cursor() + query = MySqlQuery(cursor, self.verbosity) + try: + for cpt, command in enumerate(commands): + query.execute(command) + self.connection.commit() + except: + for cpt, command in enumerate(commands): + query.execute(command) + self.connection.commit() + + + def executeManyQueriesIterator(self, table): + cursor = self.connection.cursor() + query = MySqlQuery(cursor, self.verbosity) + try: + for command in table.getIterator(): + query.execute(command) + self.connection.commit() + except: + for command in table.getIterator(): + query.execute(command) + self.connection.commit() + + + def executeFormattedQuery(self, command, *parameters): + cursor = self.connection.cursor() + query = MySqlQuery(cursor, self.verbosity) + query.executeFormat(command, parameters) + self.connection.commit() + return query