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annotate roundup/backends/back_postgresql.py @ 7696:4af0d235b570

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feat(db): support using postgresql service connection file Add new service rdbms config option to set the service name to be used with a postgresql service connection file. This can be done using the PGSERVICE environment variable for a single instance tracker server. For a multi-instance server this per-tracker config option is needed. Note that settings (host, user, (db)name...) in config.ini file will override the service connection file setting. Also setting PGSERVICE and service will use the service setting.
author John Rouillard <rouilj@ieee.org>
date Tue, 07 Nov 2023 12:11:37 -0500
parents 5b41018617f2
children b41750bf9f03
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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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50
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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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134 def set(self, *args, **kwargs):
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135 try:
3927
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136 sessions_rdbms.Sessions.set(self, *args, **kwargs)
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137 except ProgrammingError as err:
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138 response = str(err).split('\n')[0]
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139 if -1 != response.find('ERROR') and \
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140 -1 != response.find('could not serialize access due to concurrent update'):
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141 # another client just updated, and we're running on
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142 # serializable isolation.
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143 # see http://www.postgresql.org/docs/7.4/interactive/transaction-iso.html
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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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149
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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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153 identify the database type so it can import the correct indexer
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154 module when using native text search mode.
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155
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156 import_savepoint_count:
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157 count the number of savepoints that have been created during
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158 import. Once the limit of savepoints is reached, a commit is
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159 done and this is reset to 0.
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160
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161 """
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162
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163 arg = '%s'
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164
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165 dbtype = "postgres"
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166
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167 import_savepoint_count = 0
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168
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169 # Value is set from roundup-admin using db.config["RDBMS_SAVEPOINT_LIMIT"]
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170 # or to the default of 10_000 at runtime. Use 0 here to trigger
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171 # initialization.
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172 savepoint_limit = 0
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173
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174 # used by some code to switch styles of query
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175 implements_intersect = 1
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176
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177 def sql_open_connection(self):
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178 db = connection_dict(self.config, 'database')
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179 # database option always present: log it if not null
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180 if db['database']:
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181 logging.getLogger('roundup.hyperdb').info(
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diff changeset
182 'open database %r' % db['database'])
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diff changeset
183 if 'service' in db: # only log if used
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184 logging.getLogger('roundup.hyperdb').info(
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185 'open database via service %r' % db['service'])
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diff changeset
186 try:
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5cb6e6b594b0 issue2551040: New release of psycopg2 drops support for psycopg1
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parents: 5319
diff changeset
187 conn = psycopg2.connect(**db)
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188 except psycopg2.OperationalError as message:
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diff changeset
189 raise hyperdb.DatabaseError(message)
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190
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191 cursor = conn.cursor()
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05c857e5dbed New rdbms configuration option 'isolation_level'
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diff changeset
192 if ISOLATION_LEVEL_REPEATABLE_READ is not None:
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diff changeset
193 lvl = isolation_levels[self.config.RDBMS_ISOLATION_LEVEL]
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194 conn.set_isolation_level(lvl)
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195
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196 return (conn, cursor)
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197
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198 def sql_new_cursor(self, name='default', conn=None, *args, **kw):
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199 """ Create new cursor, this may need additional parameters for
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200 performance optimization for different backends.
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201 """
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202 use_name = self.config.RDBMS_SERVERSIDE_CURSOR
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203 kw = {}
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204 if use_name:
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205 kw['name'] = name
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206 if conn is None:
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diff changeset
207 conn = self.conn
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208 return conn.cursor(*args, **kw)
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diff changeset
209
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diff changeset
210 def open_connection(self):
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diff changeset
211 if not db_exists(self.config):
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diff changeset
212 db_create(self.config)
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diff changeset
213
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diff changeset
214 self.conn, self.cursor = self.sql_open_connection()
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215
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diff changeset
216 try:
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261c2e6ceb1e *** empty log message ***
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parents: 2005
diff changeset
217 self.load_dbschema()
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parents: 5118
diff changeset
218 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
219 if str(message).find('schema') == -1:
2736
402d6d556558 postgres backend open doesn't hide corruption in schema [SF#956375]
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parents: 2721
diff changeset
220 raise
1873
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diff changeset
221 self.rollback()
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diff changeset
222 self.init_dbschema()
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f63aa57386b0 Backend improvements.
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parents:
diff changeset
223 self.sql("CREATE TABLE schema (schema TEXT)")
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18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2093
diff changeset
224 self.sql("CREATE TABLE dual (dummy integer)")
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2093
diff changeset
225 self.sql("insert into dual values (1)")
2073
261c2e6ceb1e *** empty log message ***
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parents: 2005
diff changeset
226 self.create_version_2_tables()
6587
4f8fc55730e1 Add words_both_idx to newly created databases.
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parents: 6433
diff changeset
227 self.fix_version_3_tables()
5319
62de601bdf6f Fix commits although a Reject exception is raised
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parents: 5248
diff changeset
228 # Need to commit here, otherwise otk/session will not find
62de601bdf6f Fix commits although a Reject exception is raised
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diff changeset
229 # the necessary tables (in a parallel connection!)
62de601bdf6f Fix commits although a Reject exception is raised
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parents: 5248
diff changeset
230 self.commit()
6604
0d99ae7c8de6 Allow Roundup to use PostgreSQL database native full text search
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parents: 6599
diff changeset
231 self._add_fts_table()
0d99ae7c8de6 Allow Roundup to use PostgreSQL database native full text search
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diff changeset
232 self.commit()
2073
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diff changeset
233
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diff changeset
234 def checkpoint_data(self, savepoint="importing"):
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diff changeset
235 """Create a subtransaction savepoint. Allows recovery/retry
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diff changeset
236 of operation in exception handler because
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diff changeset
237 postgres requires a rollback in case of error
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diff changeset
238 generating exception. Used with
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diff changeset
239 restore_connection_on_error to handle uniqueness
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diff changeset
240 conflict in import_table().
7668
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diff changeset
241
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diff changeset
242 Savepoints take memory resources. Postgres keeps all
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diff changeset
243 savepoints (rather than overwriting) until a
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diff changeset
244 commit(). Commit every ~10,000 savepoints to prevent
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diff changeset
245 running out of memory on import.
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diff changeset
246
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diff changeset
247 NOTE: a commit outside of this method will not reset the
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diff changeset
248 import_savepoint_count. This can result in an unneeded
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diff changeset
249 commit on a new cursor (that has no savepoints) as there is
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diff changeset
250 no way to find out if there is a savepoint or how many
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diff changeset
251 savepoints are opened on a db connection/cursor.
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diff changeset
252
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diff changeset
253 Because an import is a one shot deal and not part of a long
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diff changeset
254 running daemon (e.g. the roundup-server), I am not too
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diff changeset
255 worried about it. It will just slow the import down a tad.
6433
c1d3fbcdbfbd issue2551142 - Import of retired node ... unique constraint failure.
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parents: 6332
diff changeset
256 """
7668
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diff changeset
257
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diff changeset
258 self.sql('SAVEPOINT %s' % savepoint)
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diff changeset
259
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diff changeset
260 self.import_savepoint_count += 1
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diff changeset
261
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diff changeset
262 if not self.savepoint_limit:
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263 if "RDBMS_SAVEPOINT_LIMIT" in self.config.keys():
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264 # note this config option is created on the fly
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265 # by admin.py::do_import. It is never listed in
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266 # config.ini.
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267 self.savepoint_limit = self.config["RDBMS_SAVEPOINT_LIMIT"]
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268 else:
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269 self.savepoint_limit = 10000
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270
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271 if self.import_savepoint_count > self.savepoint_limit:
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272 # track savepoints and commit every 10000 (or user value)
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273 # so we don't run postgres out of memory. An import of a
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274 # customer's tracker ran out of memory after importing
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275 # ~23000 items with: psycopg2.errors.OutOfMemory: out of
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276 # shared memory HINT: You might need to increase
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277 # max_locks_per_transaction.
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278
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279 self.commit()
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280 self.import_savepoint_count = 0
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281
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282 def restore_connection_on_error(self, savepoint="importing"):
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283 """Postgres leaves a connection/cursor in an unusable state
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284 after an error. Rollback the transaction to a
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285 previous savepoint and permit a retry of the
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286 failed statement. Used with checkpoint_data to
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287 handle uniqueness conflict in import_table().
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288 """
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289 self.sql('ROLLBACK TO %s' % savepoint)
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290
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291 def create_version_2_tables(self):
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292 # OTK store
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293 self.sql('''CREATE TABLE otks (otk_key VARCHAR(255),
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294 otk_value TEXT, otk_time float)''')
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295 self.sql('CREATE INDEX otks_key_idx ON otks(otk_key)')
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296
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297 # Sessions store
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298 self.sql('''CREATE TABLE sessions (
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299 session_key VARCHAR(255), session_time float,
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300 session_value TEXT)''')
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301 self.sql('''CREATE INDEX sessions_key_idx ON
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302 sessions(session_key)''')
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303
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304 # full-text indexing store
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305 self.sql('CREATE SEQUENCE ___textids_ids')
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306 self.sql('''CREATE TABLE __textids (
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307 _textid integer primary key, _class VARCHAR(255),
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308 _itemid VARCHAR(255), _prop VARCHAR(255))''')
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309 self.sql('''CREATE TABLE __words (_word VARCHAR(%s),
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310 _textid integer)''' % (self.indexer.maxlength + 5))
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311 self.sql('CREATE INDEX words_word_idx ON __words(_word)')
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312 self.sql('CREATE INDEX words_by_id ON __words (_textid)')
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313 self.sql('CREATE UNIQUE INDEX __textids_by_props ON '
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314 '__textids (_class, _itemid, _prop)')
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315
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316 def fix_version_2_tables(self):
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317 # Convert journal date column to TIMESTAMP, params column to TEXT
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318 self._convert_journal_tables()
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319
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320 # Convert all String properties to TEXT
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321 self._convert_string_properties()
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322
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323 # convert session / OTK *_time columns to REAL
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324 for name in ('otk', 'session'):
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325 self.sql('drop index %ss_key_idx' % name)
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326 self.sql('drop table %ss' % name)
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327 self.sql('''CREATE TABLE %ss (%s_key VARCHAR(255),
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328 %s_value VARCHAR(255), %s_time REAL)''' % (name, name,
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329 name, name))
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330 self.sql('CREATE INDEX %ss_key_idx ON %ss(%s_key)' % (name, name,
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331 name))
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332
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333 def fix_version_3_tables(self):
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334 rdbms_common.Database.fix_version_3_tables(self)
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335 self.sql('''CREATE INDEX words_both_idx ON public.__words
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336 USING btree (_word, _textid)''')
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337
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338 def _add_fts_table(self):
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339 self.sql(
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340 'CREATE TABLE __fts (_class VARCHAR(255), '
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341 '_itemid VARCHAR(255), _prop VARCHAR(255), _tsv tsvector)'
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342 )
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343
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344 self.sql('CREATE INDEX __fts_idx ON __fts USING GIN (_tsv)')
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345
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346 def fix_version_6_tables(self):
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347 # Modify length for __words._word column.
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348 c = self.cursor
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349 sql = 'alter table __words alter column _word type varchar(%s)' % (
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350 self.arg)
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351 # Why magic number 5? It was the original offset between
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352 # column length and maxlength.
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353 c.execute(sql, (self.indexer.maxlength + 5,))
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354
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355 self._add_fts_table()
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356
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357 def fix_version_7_tables(self):
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358 # Modify type for session.session_time/otk.otk_time column.
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359 # float is double precision 15 signifcant digits
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diff changeset
360 sql = 'alter table sessions alter column session_time type float'
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361 self.sql(sql)
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362 sql = 'alter table otks alter column otk_time type float'
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363 self.sql(sql)
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diff changeset
364
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diff changeset
365 def add_new_columns_v2(self):
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366 # update existing tables to have the new actor column
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367 tables = self.database_schema['tables']
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diff changeset
368 for name in tables:
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369 self.sql('ALTER TABLE _%s add __actor VARCHAR(255)' % name)
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370
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371 def __repr__(self):
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372 return '<roundpsycopgsql 0x%x>' % id(self)
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373
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diff changeset
374 def sql_stringquote(self, value):
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diff changeset
375 ''' psycopg2.QuotedString returns a "buffer" object with the
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diff changeset
376 single-quotes around it... '''
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diff changeset
377 return str(QuotedString(str(value)))[1:-1]
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diff changeset
378
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diff changeset
379 def sql_index_exists(self, table_name, index_name):
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diff changeset
380 sql = 'select count(*) from pg_indexes where ' \
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diff changeset
381 'tablename=%s and indexname=%s' % (self.arg, self.arg)
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diff changeset
382 self.sql(sql, (table_name, index_name))
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diff changeset
383 return self.cursor.fetchone()[0]
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parents:
diff changeset
384
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diff changeset
385 def create_class_table(self, spec, create_sequence=1):
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diff changeset
386 if create_sequence:
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387 sql = 'CREATE SEQUENCE _%s_ids' % spec.classname
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388 self.sql(sql)
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389
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diff changeset
390 return rdbms_common.Database.create_class_table(self, spec)
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391
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diff changeset
392 def drop_class_table(self, cn):
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393 sql = 'drop table _%s' % cn
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diff changeset
394 self.sql(sql)
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Richard Jones <richard@users.sourceforge.net>
parents: 2093
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395
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John Rouillard <rouilj@ieee.org>
parents: 6913
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396 sql = 'drop sequence _%s_ids' % cn
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Richard Jones <richard@users.sourceforge.net>
parents: 2424
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397 self.sql(sql)
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Richard Jones <richard@users.sourceforge.net>
parents:
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398
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parents: 2093
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399 def newid(self, classname):
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parents: 6913
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400 sql = "select nextval('_%s_ids') from dual" % classname
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parents: 2424
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401 self.sql(sql)
3977
732a37da3a10 Fix for postgres 8.3 compatibility (and bug) (patch [SF#2030479])
Richard Jones <richard@users.sourceforge.net>
parents: 3927
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402 return str(self.cursor.fetchone()[0])
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Richard Jones <richard@users.sourceforge.net>
parents: 2093
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403
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
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404 def setid(self, classname, setid):
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John Rouillard <rouilj@ieee.org>
parents: 6913
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405 sql = "select setval('_%s_ids', %s) from dual" % (classname,
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John Rouillard <rouilj@ieee.org>
parents: 6913
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406 int(setid))
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Richard Jones <richard@users.sourceforge.net>
parents: 2424
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407 self.sql(sql)
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Richard Jones <richard@users.sourceforge.net>
parents: 2093
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408
3310
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3155
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409 def clear(self):
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3155
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410 rdbms_common.Database.clear(self)
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3155
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411
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3155
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412 # reset the sequences
4357
13b3155869e0 Beginnings of a big code cleanup / modernisation to make 2to3 happy
Richard Jones <richard@users.sourceforge.net>
parents: 4239
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413 for cn in self.classes:
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John Rouillard <rouilj@ieee.org>
parents: 6913
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414 self.cursor.execute('DROP SEQUENCE _%s_ids' % cn)
b5062cb5c2a2 flake8 fixes
John Rouillard <rouilj@ieee.org>
parents: 6913
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415 self.cursor.execute('CREATE SEQUENCE _%s_ids' % cn)
b5062cb5c2a2 flake8 fixes
John Rouillard <rouilj@ieee.org>
parents: 6913
diff changeset
416
3310
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Richard Jones <richard@users.sourceforge.net>
parents: 3155
diff changeset
417
3685
4d9adb8bc3b1 Null-value sorting fixes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3659
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418 class PostgresqlClass:
4d9adb8bc3b1 Null-value sorting fixes:
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3659
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419 order_by_null_values = '(%s is not NULL)'
4787
4a017661e414 Closed issue2550805 (Postgresql should search title case insensitive), by Tom Ekberg.
Bernhard Reiter <bernhard@intevation.de>
parents: 4570
diff changeset
420 case_insensitive_like = 'ILIKE'
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Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
421
6935
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John Rouillard <rouilj@ieee.org>
parents: 6913
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422
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3659
diff changeset
423 class Class(PostgresqlClass, rdbms_common.Class):
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Richard Jones <richard@users.sourceforge.net>
parents:
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424 pass
6935
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John Rouillard <rouilj@ieee.org>
parents: 6913
diff changeset
425
b5062cb5c2a2 flake8 fixes
John Rouillard <rouilj@ieee.org>
parents: 6913
diff changeset
426
3685
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3659
diff changeset
427 class IssueClass(PostgresqlClass, rdbms_common.IssueClass):
1873
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Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
428 pass
6935
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John Rouillard <rouilj@ieee.org>
parents: 6913
diff changeset
429
b5062cb5c2a2 flake8 fixes
John Rouillard <rouilj@ieee.org>
parents: 6913
diff changeset
430
3685
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Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3659
diff changeset
431 class FileClass(PostgresqlClass, rdbms_common.FileClass):
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Richard Jones <richard@users.sourceforge.net>
parents:
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432 pass
f63aa57386b0 Backend improvements.
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
433
3920
416606b09b27 fix vim modelines
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3918
diff changeset
434 # vim: set et sts=4 sw=4 :
Roundup Issue Tracker: http://roundup-tracker.org/