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1 #
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2 # Copyright INRA-URGI 2009-2010
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3 #
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4 # This software is governed by the CeCILL license under French law and
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5 # abiding by the rules of distribution of free software. You can use,
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6 # modify and/ or redistribute the software under the terms of the CeCILL
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7 # license as circulated by CEA, CNRS and INRIA at the following URL
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8 # "http://www.cecill.info".
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9 #
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10 # As a counterpart to the access to the source code and rights to copy,
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11 # modify and redistribute granted by the license, users are provided only
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12 # with a limited warranty and the software's author, the holder of the
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13 # economic rights, and the successive licensors have only limited
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14 # liability.
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15 #
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16 # In this respect, the user's attention is drawn to the risks associated
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17 # with loading, using, modifying and/or developing or reproducing the
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18 # software by the user in light of its specific status of free software,
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19 # that may mean that it is complicated to manipulate, and that also
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20 # therefore means that it is reserved for developers and experienced
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21 # professionals having in-depth computer knowledge. Users are therefore
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22 # encouraged to load and test the software's suitability as regards their
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23 # requirements in conditions enabling the security of their systems and/or
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24 # data to be ensured and, more generally, to use and operate it in the
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25 # same conditions as regards security.
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26 #
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27 # The fact that you are presently reading this means that you have had
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28 # knowledge of the CeCILL license and that you accept its terms.
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29 #
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30 #! /usr/bin/env python
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31 import os
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32 import random
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33 import sqlite3
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34 from SMART.Java.Python.mySql.MySqlQuery import MySqlQuery
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35
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36
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37 class MySqlConnection(object):
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38 """Connection to a database"""
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39
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40 def __init__(self, verbosity = 0):
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41 self.verbosity = verbosity
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42 self.databaseName = os.path.join(os.environ.get("SMARTTMPPATH", "."), "smartdb%d" % random.randint(0, 100000))
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43 self.connection = sqlite3.connect(self.databaseName)
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44 self.executeQuery("PRAGMA journal_mode = OFF")
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45 self.executeQuery("PRAGMA synchronous = 0")
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46 self.executeQuery("PRAGMA locking_mode = EXCLUSIVE")
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47 self.executeQuery("PRAGMA count_change = OFF")
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48 self.executeQuery("PRAGMA temp_store = 2")
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49
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50 def __del__(self):
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51 self.connection.close()
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52
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53
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54 def createDatabase(self):
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55 pass
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56
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57
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58 def deleteDatabase(self):
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59 if os.path.exists(self.databaseName):
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60 os.remove(self.databaseName)
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61
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62
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63 def executeQuery(self, command, insertion = False):
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64 cursor = self.connection.cursor()
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65 query = MySqlQuery(cursor, self.verbosity)
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66 try:
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67 result = query.execute(command, insertion)
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68 self.connection.commit()
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69 except:
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70 result = query.execute(command, insertion)
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71 self.connection.commit()
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72 if insertion:
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73 return result
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74 else:
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75 return query
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76
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77
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78 def executeManyQueries(self, commands):
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79 cursor = self.connection.cursor()
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80 query = MySqlQuery(cursor, self.verbosity)
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81 try:
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82 for cpt, command in enumerate(commands):
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83 query.execute(command)
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84 self.connection.commit()
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85 except:
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86 for cpt, command in enumerate(commands):
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87 query.execute(command)
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88 self.connection.commit()
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89
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90
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91 def executeManyQueriesIterator(self, table):
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92 cursor = self.connection.cursor()
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93 query = MySqlQuery(cursor, self.verbosity)
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94 try:
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95 for command in table.getIterator():
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96 query.execute(command)
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97 self.connection.commit()
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98 except:
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99 for command in table.getIterator():
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100 query.execute(command)
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101 self.connection.commit()
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102
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103
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46
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104 def executeFormattedQuery(self, command, *parameters):
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105 cursor = self.connection.cursor()
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106 query = MySqlQuery(cursor, self.verbosity)
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46
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107 query.executeFormat(command, parameters)
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36
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108 self.connection.commit()
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46
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109 return query
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