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annotate roundup/backends/back_postgresql.py @ 7558:c8a931aa7514

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fix(i18n): issue2551184 - improve i18n handling Apply patch to make sure that the dates tests use the locale files in the deployed tracker and not other roundup files.
author Marcus Preisch
date Thu, 20 Jul 2023 20:08:28 -0400
parents b5062cb5c2a2
children 5b41018617f2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # Copyright (c) 2003 Martynas Sklyzmantas, Andrey Lebedev <andrey@micro.lt>
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2 #
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3 # This module is free software, and you may redistribute it and/or modify
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4 # under the same terms as Python, so long as this copyright message and
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5 # disclaimer are retained in their original form.
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6 #
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7 '''Postgresql backend via psycopg2 for Roundup.'''
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8 __docformat__ = 'restructuredtext'
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9
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10 import logging
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11 import os
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12 import shutil
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13 import time
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14
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15 ISOLATION_LEVEL_READ_UNCOMMITTED = None
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16 ISOLATION_LEVEL_READ_COMMITTED = None
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17 ISOLATION_LEVEL_REPEATABLE_READ = None
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18 ISOLATION_LEVEL_SERIALIZABLE = None
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19
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20 import psycopg2 # noqa: E402
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21 from psycopg2 import ProgrammingError # noqa: E402
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22 from psycopg2.extensions import QuotedString # noqa: E402
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23 from psycopg2.extensions import ISOLATION_LEVEL_READ_UNCOMMITTED # noqa: F401 E402
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24 from psycopg2.extensions import ISOLATION_LEVEL_READ_COMMITTED # noqa: E402
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25 from psycopg2.extensions import ISOLATION_LEVEL_REPEATABLE_READ # noqa: E402
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26 from psycopg2.extensions import ISOLATION_LEVEL_SERIALIZABLE # noqa: E402
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27 from psycopg2.extensions import TransactionRollbackError # noqa: F401 E402
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28
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29 from roundup import hyperdb # noqa: E402
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30 from roundup.backends import rdbms_common # noqa: E402
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31 from roundup.backends import sessions_rdbms # noqa: E402
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32
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33 isolation_levels = {
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34 'read uncommitted': ISOLATION_LEVEL_READ_COMMITTED,
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35 'read committed': ISOLATION_LEVEL_READ_COMMITTED,
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36 'repeatable read': ISOLATION_LEVEL_REPEATABLE_READ,
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37 'serializable': ISOLATION_LEVEL_SERIALIZABLE
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38 }
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39
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40
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41 def connection_dict(config, dbnamestr=None):
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42 ''' read_default_group is MySQL-specific, ignore it '''
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43 d = rdbms_common.connection_dict(config, dbnamestr)
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44 if 'read_default_group' in d:
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45 del d['read_default_group']
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46 if 'read_default_file' in d:
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47 del d['read_default_file']
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48 return d
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49
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51 def db_create(config):
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52 """Clear all database contents and drop database itself"""
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53 command = "CREATE DATABASE \"%s\" WITH ENCODING='UNICODE'" % config.RDBMS_NAME
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54 if config.RDBMS_TEMPLATE:
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55 command = command + " TEMPLATE=%s" % config.RDBMS_TEMPLATE
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56 logging.getLogger('roundup.hyperdb').info(command)
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57 db_command(config, command)
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58
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59
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60 def db_nuke(config):
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61 """Clear all database contents and drop database itself"""
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62 command = 'DROP DATABASE "%s"' % config.RDBMS_NAME
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63 logging.getLogger('roundup.hyperdb').info(command)
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64 db_command(config, command)
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65
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66 if os.path.exists(config.DATABASE):
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67 shutil.rmtree(config.DATABASE)
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68
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69
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70 def db_command(config, command, database='postgres'):
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71 '''Perform some sort of database-level command. Retry 10 times if we
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72 fail by conflicting with another user.
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73
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74 Since PostgreSQL version 8.1 there is a database "postgres",
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75 before "template1" seems to have been used, so we fall back to it.
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76 Compare to issue2550543.
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77 '''
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78 template1 = connection_dict(config)
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79 template1['database'] = database
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80
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81 try:
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82 conn = psycopg2.connect(**template1)
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83 except psycopg2.OperationalError as message:
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84 if str(message).find('database "postgres" does not exist') >= 0:
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85 return db_command(config, command, database='template1')
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86 raise hyperdb.DatabaseError(message)
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87
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88 conn.set_isolation_level(0)
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89 cursor = conn.cursor()
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90 try:
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91 for _n in range(10):
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92 if pg_command(cursor, command):
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93 return
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94 finally:
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95 conn.close()
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96 raise RuntimeError('10 attempts to create database failed')
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97
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98
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99 def pg_command(cursor, command):
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100 '''Execute the postgresql command, which may be blocked by some other
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101 user connecting to the database, and return a true value if it succeeds.
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102
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103 If there is a concurrent update, retry the command.
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104 '''
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105 try:
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106 cursor.execute(command)
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107 except psycopg2.DatabaseError as err:
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108 response = str(err).split('\n')[0]
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109 if "FATAL" not in response:
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110 msgs = (
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111 'is being accessed by other users',
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112 'could not serialize access due to concurrent update',
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113 )
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114 for msg in msgs:
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115 if msg in response:
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116 time.sleep(0.1)
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117 return 0
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118 raise RuntimeError(response)
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119 return 1
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120
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121
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122 def db_exists(config):
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123 """Check if database already exists"""
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124 db = connection_dict(config, 'database')
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125 try:
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126 conn = psycopg2.connect(**db)
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127 conn.close()
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128 return 1
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129 except Exception:
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130 return 0
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131
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132
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133 class Sessions(sessions_rdbms.Sessions):
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21d3d7eeea8c assorted pyflakes fixes
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134 def set(self, *args, **kwargs):
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diff changeset
135 try:
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136 sessions_rdbms.Sessions.set(self, *args, **kwargs)
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137 except ProgrammingError as err:
3918
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diff changeset
138 response = str(err).split('\n')[0]
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parents: 3863
diff changeset
139 if -1 != response.find('ERROR') and \
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parents: 3863
diff changeset
140 -1 != response.find('could not serialize access due to concurrent update'):
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parents: 3863
diff changeset
141 # another client just updated, and we're running on
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parents: 3863
diff changeset
142 # serializable isolation.
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parents: 3863
diff changeset
143 # see http://www.postgresql.org/docs/7.4/interactive/transaction-iso.html
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diff changeset
144 self.db.rollback()
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145
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146
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147 class Database(rdbms_common.Database):
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148 """Postgres DB backend implementation
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parents: 4887
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149
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parents: 4887
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150 attributes:
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151 dbtype:
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152 holds the value for the type of db. It is used by indexer to
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parents: 4887
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153 identify the database type so it can import the correct indexer
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parents: 4887
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154 module when using native text search mode.
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parents: 4887
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155 """
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156
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157 arg = '%s'
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158
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parents: 4887
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159 dbtype = "postgres"
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parents: 4887
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160
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161 # used by some code to switch styles of query
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162 implements_intersect = 1
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163
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parents: 1906
diff changeset
164 def sql_open_connection(self):
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parents: 3088
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165 db = connection_dict(self.config, 'database')
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67bef70ab9b9 - more logger fixes, sorry for the noise.
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parents: 4420
diff changeset
166 logging.getLogger('roundup.hyperdb').info(
6935
b5062cb5c2a2 flake8 fixes
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parents: 6913
diff changeset
167 'open database %r' % db['database'])
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parents: 2077
diff changeset
168 try:
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parents: 5319
diff changeset
169 conn = psycopg2.connect(**db)
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parents: 5319
diff changeset
170 except psycopg2.OperationalError as message:
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171 raise hyperdb.DatabaseError(message)
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172
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173 cursor = conn.cursor()
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05c857e5dbed New rdbms configuration option 'isolation_level'
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parents: 4787
diff changeset
174 if ISOLATION_LEVEL_REPEATABLE_READ is not None:
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175 lvl = isolation_levels[self.config.RDBMS_ISOLATION_LEVEL]
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176 conn.set_isolation_level(lvl)
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177
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178 return (conn, cursor)
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179
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180 def sql_new_cursor(self, name='default', conn=None, *args, **kw):
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181 """ Create new cursor, this may need additional parameters for
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diff changeset
182 performance optimization for different backends.
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diff changeset
183 """
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184 use_name = self.config.RDBMS_SERVERSIDE_CURSOR
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diff changeset
185 kw = {}
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diff changeset
186 if use_name:
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diff changeset
187 kw['name'] = name
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diff changeset
188 if conn is None:
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diff changeset
189 conn = self.conn
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diff changeset
190 return conn.cursor(*args, **kw)
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diff changeset
191
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diff changeset
192 def open_connection(self):
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diff changeset
193 if not db_exists(self.config):
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diff changeset
194 db_create(self.config)
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diff changeset
195
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diff changeset
196 self.conn, self.cursor = self.sql_open_connection()
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197
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diff changeset
198 try:
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parents: 2005
diff changeset
199 self.load_dbschema()
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198b6e810c67 Use Python-3-compatible 'as' syntax for except statements
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parents: 5118
diff changeset
200 except ProgrammingError as message:
3739
f1363e19121a fix error detection for non-EN locales of postgres [SF#1592249]
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parents: 3717
diff changeset
201 if str(message).find('schema') == -1:
2736
402d6d556558 postgres backend open doesn't hide corruption in schema [SF#956375]
Richard Jones <richard@users.sourceforge.net>
parents: 2721
diff changeset
202 raise
1873
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diff changeset
203 self.rollback()
2075
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diff changeset
204 self.init_dbschema()
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parents:
diff changeset
205 self.sql("CREATE TABLE schema (schema TEXT)")
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diff changeset
206 self.sql("CREATE TABLE dual (dummy integer)")
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diff changeset
207 self.sql("insert into dual values (1)")
2073
261c2e6ceb1e *** empty log message ***
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parents: 2005
diff changeset
208 self.create_version_2_tables()
6587
4f8fc55730e1 Add words_both_idx to newly created databases.
John Rouillard <rouilj@ieee.org>
parents: 6433
diff changeset
209 self.fix_version_3_tables()
5319
62de601bdf6f Fix commits although a Reject exception is raised
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parents: 5248
diff changeset
210 # Need to commit here, otherwise otk/session will not find
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parents: 5248
diff changeset
211 # the necessary tables (in a parallel connection!)
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parents: 5248
diff changeset
212 self.commit()
6604
0d99ae7c8de6 Allow Roundup to use PostgreSQL database native full text search
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parents: 6599
diff changeset
213 self._add_fts_table()
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John Rouillard <rouilj@ieee.org>
parents: 6599
diff changeset
214 self.commit()
2073
261c2e6ceb1e *** empty log message ***
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parents: 2005
diff changeset
215
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diff changeset
216 def checkpoint_data(self, savepoint="importing"):
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diff changeset
217 """Create a subtransaction savepoint. Allows recovery/retry
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parents: 6604
diff changeset
218 of operation in exception handler because
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parents: 6604
diff changeset
219 postgres requires a rollback in case of error
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parents: 6604
diff changeset
220 generating exception. Used with
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parents: 6604
diff changeset
221 restore_connecion_on_error to handle uniqueness
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John Rouillard <rouilj@ieee.org>
parents: 6604
diff changeset
222 conflict in import_table().
6433
c1d3fbcdbfbd issue2551142 - Import of retired node ... unique constraint failure.
John Rouillard <rouilj@ieee.org>
parents: 6332
diff changeset
223 """
6610
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parents: 6604
diff changeset
224 # Savepoints take resources. Postgres keeps all
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John Rouillard <rouilj@ieee.org>
parents: 6604
diff changeset
225 # savepoints (rather than overwriting) until a
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parents: 6604
diff changeset
226 # commit(). If an import fails because of a resource
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parents: 6604
diff changeset
227 # issue with savepoints, uncomment this line. I
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parents: 6604
diff changeset
228 # expect it will slow down the import but it should
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parents: 6604
diff changeset
229 # eliminate any issue with stored savepoints and
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parents: 6604
diff changeset
230 # resource use.
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John Rouillard <rouilj@ieee.org>
parents: 6604
diff changeset
231 #
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diff changeset
232 # self.sql('RELEASE SAVEPOINT %s' % savepoint)
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parents: 6604
diff changeset
233 self.sql('SAVEPOINT %s' % savepoint)
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c1d3fbcdbfbd issue2551142 - Import of retired node ... unique constraint failure.
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parents: 6332
diff changeset
234
6610
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diff changeset
235 def restore_connection_on_error(self, savepoint="importing"):
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parents: 6604
diff changeset
236 """Postgres leaves a connection/cursor in an unusable state
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John Rouillard <rouilj@ieee.org>
parents: 6604
diff changeset
237 after an error. Rollback the transaction to a
db3f0ba75b4a Change checkpoint_data and restore_connection_on_error to subtransaction
John Rouillard <rouilj@ieee.org>
parents: 6604
diff changeset
238 previous savepoint and permit a retry of the
db3f0ba75b4a Change checkpoint_data and restore_connection_on_error to subtransaction
John Rouillard <rouilj@ieee.org>
parents: 6604
diff changeset
239 failed statement. Used with checkpoint_data to
db3f0ba75b4a Change checkpoint_data and restore_connection_on_error to subtransaction
John Rouillard <rouilj@ieee.org>
parents: 6604
diff changeset
240 handle uniqueness conflict in import_table().
6433
c1d3fbcdbfbd issue2551142 - Import of retired node ... unique constraint failure.
John Rouillard <rouilj@ieee.org>
parents: 6332
diff changeset
241 """
6610
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parents: 6604
diff changeset
242 self.sql('ROLLBACK TO %s' % savepoint)
6433
c1d3fbcdbfbd issue2551142 - Import of retired node ... unique constraint failure.
John Rouillard <rouilj@ieee.org>
parents: 6332
diff changeset
243
2073
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Richard Jones <richard@users.sourceforge.net>
parents: 2005
diff changeset
244 def create_version_2_tables(self):
2093
3f6024ab2c7a That's the last of the RDBMS migration steps done! Yay!
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parents: 2089
diff changeset
245 # OTK store
2514
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parents: 2424
diff changeset
246 self.sql('''CREATE TABLE otks (otk_key VARCHAR(255),
6806
bdd28b244839 - issue2551223 - fix timestamp truncation in mysql and postgresql
John Rouillard <rouilj@ieee.org>
parents: 6610
diff changeset
247 otk_value TEXT, otk_time float)''')
2514
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parents: 2424
diff changeset
248 self.sql('CREATE INDEX otks_key_idx ON otks(otk_key)')
2093
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parents: 2089
diff changeset
249
3f6024ab2c7a That's the last of the RDBMS migration steps done! Yay!
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parents: 2089
diff changeset
250 # Sessions store
2514
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parents: 2424
diff changeset
251 self.sql('''CREATE TABLE sessions (
6806
bdd28b244839 - issue2551223 - fix timestamp truncation in mysql and postgresql
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parents: 6610
diff changeset
252 session_key VARCHAR(255), session_time float,
2721
1cd01cf106e1 extend OTK and session table value cols to TEXT [SF#1031271]
Richard Jones <richard@users.sourceforge.net>
parents: 2719
diff changeset
253 session_value TEXT)''')
2514
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diff changeset
254 self.sql('''CREATE INDEX sessions_key_idx ON
2098
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parents: 2093
diff changeset
255 sessions(session_key)''')
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parents:
diff changeset
256
2093
3f6024ab2c7a That's the last of the RDBMS migration steps done! Yay!
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parents: 2089
diff changeset
257 # full-text indexing store
2514
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parents: 2424
diff changeset
258 self.sql('CREATE SEQUENCE ___textids_ids')
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parents: 2424
diff changeset
259 self.sql('''CREATE TABLE __textids (
2098
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parents: 2093
diff changeset
260 _textid integer primary key, _class VARCHAR(255),
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parents: 2093
diff changeset
261 _itemid VARCHAR(255), _prop VARCHAR(255))''')
6593
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262 self.sql('''CREATE TABLE __words (_word VARCHAR(%s),
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263 _textid integer)''' % (self.indexer.maxlength + 5))
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264 self.sql('CREATE INDEX words_word_idx ON __words(_word)')
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265 self.sql('CREATE INDEX words_by_id ON __words (_textid)')
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266 self.sql('CREATE UNIQUE INDEX __textids_by_props ON '
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diff changeset
267 '__textids (_class, _itemid, _prop)')
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268
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269 def fix_version_2_tables(self):
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270 # Convert journal date column to TIMESTAMP, params column to TEXT
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271 self._convert_journal_tables()
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272
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273 # Convert all String properties to TEXT
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274 self._convert_string_properties()
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275
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276 # convert session / OTK *_time columns to REAL
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277 for name in ('otk', 'session'):
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278 self.sql('drop index %ss_key_idx' % name)
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279 self.sql('drop table %ss' % name)
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280 self.sql('''CREATE TABLE %ss (%s_key VARCHAR(255),
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281 %s_value VARCHAR(255), %s_time REAL)''' % (name, name,
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282 name, name))
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283 self.sql('CREATE INDEX %ss_key_idx ON %ss(%s_key)' % (name, name,
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284 name))
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285
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286 def fix_version_3_tables(self):
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287 rdbms_common.Database.fix_version_3_tables(self)
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288 self.sql('''CREATE INDEX words_both_idx ON public.__words
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289 USING btree (_word, _textid)''')
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290
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291 def _add_fts_table(self):
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292 self.sql(
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293 'CREATE TABLE __fts (_class VARCHAR(255), '
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294 '_itemid VARCHAR(255), _prop VARCHAR(255), _tsv tsvector)'
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295 )
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296
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297 self.sql('CREATE INDEX __fts_idx ON __fts USING GIN (_tsv)')
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298
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299 def fix_version_6_tables(self):
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300 # Modify length for __words._word column.
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301 c = self.cursor
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302 sql = 'alter table __words alter column _word type varchar(%s)' % (
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diff changeset
303 self.arg)
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304 # Why magic number 5? It was the original offset between
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305 # column length and maxlength.
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306 c.execute(sql, (self.indexer.maxlength + 5,))
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307
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308 self._add_fts_table()
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309
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310 def fix_version_7_tables(self):
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311 # Modify type for session.session_time/otk.otk_time column.
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312 # float is double precision 15 signifcant digits
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diff changeset
313 sql = 'alter table sessions alter column session_time type float'
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314 self.sql(sql)
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315 sql = 'alter table otks alter column otk_time type float'
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316 self.sql(sql)
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317
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diff changeset
318 def add_new_columns_v2(self):
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319 # update existing tables to have the new actor column
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320 tables = self.database_schema['tables']
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321 for name in tables:
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322 self.sql('ALTER TABLE _%s add __actor VARCHAR(255)' % name)
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323
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324 def __repr__(self):
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325 return '<roundpsycopgsql 0x%x>' % id(self)
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326
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diff changeset
327 def sql_stringquote(self, value):
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parents: 5319
diff changeset
328 ''' psycopg2.QuotedString returns a "buffer" object with the
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diff changeset
329 single-quotes around it... '''
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diff changeset
330 return str(QuotedString(str(value)))[1:-1]
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diff changeset
331
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diff changeset
332 def sql_index_exists(self, table_name, index_name):
f255363e6d97 PostgreSQL backend lands.
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333 sql = 'select count(*) from pg_indexes where ' \
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334 'tablename=%s and indexname=%s' % (self.arg, self.arg)
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335 self.sql(sql, (table_name, index_name))
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diff changeset
336 return self.cursor.fetchone()[0]
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337
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diff changeset
338 def create_class_table(self, spec, create_sequence=1):
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diff changeset
339 if create_sequence:
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340 sql = 'CREATE SEQUENCE _%s_ids' % spec.classname
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341 self.sql(sql)
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342
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343 return rdbms_common.Database.create_class_table(self, spec)
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344
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345 def drop_class_table(self, cn):
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346 sql = 'drop table _%s' % cn
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diff changeset
347 self.sql(sql)
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diff changeset
348
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diff changeset
349 sql = 'drop sequence _%s_ids' % cn
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diff changeset
350 self.sql(sql)
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diff changeset
351
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diff changeset
352 def newid(self, classname):
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diff changeset
353 sql = "select nextval('_%s_ids') from dual" % classname
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diff changeset
354 self.sql(sql)
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parents: 3927
diff changeset
355 return str(self.cursor.fetchone()[0])
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diff changeset
356
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diff changeset
357 def setid(self, classname, setid):
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diff changeset
358 sql = "select setval('_%s_ids', %s) from dual" % (classname,
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diff changeset
359 int(setid))
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diff changeset
360 self.sql(sql)
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diff changeset
361
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parents: 3155
diff changeset
362 def clear(self):
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diff changeset
363 rdbms_common.Database.clear(self)
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parents: 3155
diff changeset
364
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parents: 3155
diff changeset
365 # reset the sequences
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parents: 4239
diff changeset
366 for cn in self.classes:
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diff changeset
367 self.cursor.execute('DROP SEQUENCE _%s_ids' % cn)
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diff changeset
368 self.cursor.execute('CREATE SEQUENCE _%s_ids' % cn)
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diff changeset
369
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diff changeset
370
3685
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3659
diff changeset
371 class PostgresqlClass:
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diff changeset
372 order_by_null_values = '(%s is not NULL)'
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4a017661e414 Closed issue2550805 (Postgresql should search title case insensitive), by Tom Ekberg.
Bernhard Reiter <bernhard@intevation.de>
parents: 4570
diff changeset
373 case_insensitive_like = 'ILIKE'
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diff changeset
374
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diff changeset
375
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diff changeset
376 class Class(PostgresqlClass, rdbms_common.Class):
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diff changeset
377 pass
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diff changeset
378
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diff changeset
379
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diff changeset
380 class IssueClass(PostgresqlClass, rdbms_common.IssueClass):
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parents:
diff changeset
381 pass
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diff changeset
382
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diff changeset
383
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diff changeset
384 class FileClass(PostgresqlClass, rdbms_common.FileClass):
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385 pass
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parents:
diff changeset
386
3920
416606b09b27 fix vim modelines
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3918
diff changeset
387 # vim: set et sts=4 sw=4 :
Roundup Issue Tracker: http://roundup-tracker.org/