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annotate roundup/backends/back_postgresql.py @ 4570:6e3e4f24c753

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Remove keyword expansions from CVS. All regression tests passed afterwards.
author Eric S. Raymond <esr@thyrsus.com>
date Wed, 16 Nov 2011 09:51:38 -0500
parents 6467fd9a3afd
children 4a017661e414
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 #
2005
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7 '''Postgresql backend via psycopg for Roundup.'''
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8 __docformat__ = 'restructuredtext'
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9
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10 import os, shutil, time
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11 try:
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12 import psycopg
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13 from psycopg import QuotedString
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14 from psycopg import ProgrammingError
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15 except:
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16 from psycopg2 import psycopg1 as psycopg
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17 from psycopg2.extensions import QuotedString
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18 from psycopg2.psycopg1 import ProgrammingError
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19 import logging
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20
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21 from roundup import hyperdb, date
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22 from roundup.backends import rdbms_common
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23 from roundup.backends import sessions_rdbms
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24
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25 def connection_dict(config, dbnamestr=None):
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26 ''' read_default_group is MySQL-specific, ignore it '''
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27 d = rdbms_common.connection_dict(config, dbnamestr)
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28 if 'read_default_group' in d:
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29 del d['read_default_group']
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30 if 'read_default_file' in d:
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31 del d['read_default_file']
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32 return d
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33
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34 def db_create(config):
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35 """Clear all database contents and drop database itself"""
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36 command = "CREATE DATABASE \"%s\" WITH ENCODING='UNICODE'"%config.RDBMS_NAME
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37 if config.RDBMS_TEMPLATE :
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38 command = command + " TEMPLATE=%s" % config.RDBMS_TEMPLATE
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39 logging.getLogger('roundup.hyperdb').info(command)
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40 db_command(config, command)
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41
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42 def db_nuke(config, fail_ok=0):
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43 """Clear all database contents and drop database itself"""
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44 command = 'DROP DATABASE "%s"'% config.RDBMS_NAME
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45 logging.getLogger('roundup.hyperdb').info(command)
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46 db_command(config, command)
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47
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48 if os.path.exists(config.DATABASE):
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49 shutil.rmtree(config.DATABASE)
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50
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51 def db_command(config, command, database='postgres'):
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52 '''Perform some sort of database-level command. Retry 10 times if we
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53 fail by conflicting with another user.
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54
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55 Since PostgreSQL version 8.1 there is a database "postgres",
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56 before "template1" seems to habe been used, so we fall back to it.
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57 Compare to issue2550543.
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58 '''
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59 template1 = connection_dict(config)
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60 template1['database'] = database
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61
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62 try:
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63 conn = psycopg.connect(**template1)
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64 except psycopg.OperationalError, message:
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65 if str(message).find('database "postgres" does not exist') >= 0:
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66 return db_command(config, command, database='template1')
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67 raise hyperdb.DatabaseError(message)
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68
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69 conn.set_isolation_level(0)
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70 cursor = conn.cursor()
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71 try:
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72 for n in range(10):
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73 if pg_command(cursor, command):
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74 return
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75 finally:
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76 conn.close()
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77 raise RuntimeError('10 attempts to create database failed')
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78
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79 def pg_command(cursor, command):
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80 '''Execute the postgresql command, which may be blocked by some other
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81 user connecting to the database, and return a true value if it succeeds.
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82
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83 If there is a concurrent update, retry the command.
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84 '''
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85 try:
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86 cursor.execute(command)
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87 except psycopg.ProgrammingError, err:
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88 response = str(err).split('\n')[0]
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89 if response.find('FATAL') != -1:
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90 raise RuntimeError(response)
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91 else:
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92 msgs = [
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93 'is being accessed by other users',
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94 'could not serialize access due to concurrent update',
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95 ]
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96 can_retry = 0
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97 for msg in msgs:
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98 if response.find(msg) == -1:
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99 can_retry = 1
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100 if can_retry:
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101 time.sleep(1)
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102 return 0
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103 raise RuntimeError(response)
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104 return 1
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105
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106 def db_exists(config):
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107 """Check if database already exists"""
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108 db = connection_dict(config, 'database')
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109 try:
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110 conn = psycopg.connect(**db)
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111 conn.close()
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112 return 1
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113 except:
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114 return 0
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115
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116 class Sessions(sessions_rdbms.Sessions):
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117 def set(self, *args, **kwargs):
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118 try:
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119 sessions_rdbms.Sessions.set(self, *args, **kwargs)
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120 except ProgrammingError, err:
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121 response = str(err).split('\n')[0]
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122 if -1 != response.find('ERROR') and \
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123 -1 != response.find('could not serialize access due to concurrent update'):
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124 # another client just updated, and we're running on
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125 # serializable isolation.
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126 # see http://www.postgresql.org/docs/7.4/interactive/transaction-iso.html
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127 self.db.rollback()
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128
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129 class Database(rdbms_common.Database):
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130 arg = '%s'
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131
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132 # used by some code to switch styles of query
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133 implements_intersect = 1
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134
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135 def getSessionManager(self):
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136 return Sessions(self)
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137
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diff changeset
138 def sql_open_connection(self):
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139 db = connection_dict(self.config, 'database')
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140 logging.getLogger('roundup.hyperdb').info(
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141 'open database %r'%db['database'])
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142 try:
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143 conn = psycopg.connect(**db)
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144 except psycopg.OperationalError, message:
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145 raise hyperdb.DatabaseError(message)
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146
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147 cursor = conn.cursor()
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148
c091cacdc505 Finished implementation of session and one-time-key stores for RDBMS backends.
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149 return (conn, cursor)
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150
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151 def open_connection(self):
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152 if not db_exists(self.config):
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153 db_create(self.config)
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154
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155 self.conn, self.cursor = self.sql_open_connection()
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156
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157 try:
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158 self.load_dbschema()
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diff changeset
159 except psycopg.ProgrammingError, message:
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diff changeset
160 if str(message).find('schema') == -1:
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diff changeset
161 raise
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162 self.rollback()
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163 self.init_dbschema()
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164 self.sql("CREATE TABLE schema (schema TEXT)")
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165 self.sql("CREATE TABLE dual (dummy integer)")
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166 self.sql("insert into dual values (1)")
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167 self.create_version_2_tables()
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168
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diff changeset
169 def create_version_2_tables(self):
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170 # OTK store
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171 self.sql('''CREATE TABLE otks (otk_key VARCHAR(255),
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diff changeset
172 otk_value TEXT, otk_time REAL)''')
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diff changeset
173 self.sql('CREATE INDEX otks_key_idx ON otks(otk_key)')
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diff changeset
174
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175 # Sessions store
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176 self.sql('''CREATE TABLE sessions (
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diff changeset
177 session_key VARCHAR(255), session_time REAL,
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diff changeset
178 session_value TEXT)''')
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179 self.sql('''CREATE INDEX sessions_key_idx ON
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diff changeset
180 sessions(session_key)''')
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181
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182 # full-text indexing store
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diff changeset
183 self.sql('CREATE SEQUENCE ___textids_ids')
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184 self.sql('''CREATE TABLE __textids (
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185 _textid integer primary key, _class VARCHAR(255),
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diff changeset
186 _itemid VARCHAR(255), _prop VARCHAR(255))''')
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diff changeset
187 self.sql('''CREATE TABLE __words (_word VARCHAR(30),
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diff changeset
188 _textid integer)''')
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189 self.sql('CREATE INDEX words_word_idx ON __words(_word)')
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bb30bbfc7cdd Indexing fixes.
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diff changeset
190 self.sql('CREATE INDEX words_by_id ON __words (_textid)')
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diff changeset
191 self.sql('CREATE UNIQUE INDEX __textids_by_props ON '
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diff changeset
192 '__textids (_class, _itemid, _prop)')
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diff changeset
193
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diff changeset
194 def fix_version_2_tables(self):
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195 # Convert journal date column to TIMESTAMP, params column to TEXT
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196 self._convert_journal_tables()
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diff changeset
197
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diff changeset
198 # Convert all String properties to TEXT
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199 self._convert_string_properties()
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diff changeset
200
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diff changeset
201 # convert session / OTK *_time columns to REAL
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diff changeset
202 for name in ('otk', 'session'):
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diff changeset
203 self.sql('drop index %ss_key_idx'%name)
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diff changeset
204 self.sql('drop table %ss'%name)
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diff changeset
205 self.sql('''CREATE TABLE %ss (%s_key VARCHAR(255),
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diff changeset
206 %s_value VARCHAR(255), %s_time REAL)'''%(name, name, name,
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diff changeset
207 name))
2514
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diff changeset
208 self.sql('CREATE INDEX %ss_key_idx ON %ss(%s_key)'%(name, name,
2413
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diff changeset
209 name))
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diff changeset
210
2745
b284ff7af3fb add optimised index on postgresql text index table
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diff changeset
211 def fix_version_3_tables(self):
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diff changeset
212 rdbms_common.Database.fix_version_3_tables(self)
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diff changeset
213 self.sql('''CREATE INDEX words_both_idx ON public.__words
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diff changeset
214 USING btree (_word, _textid)''')
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diff changeset
215
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3e0961d6d44d Added the "actor" property.
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diff changeset
216 def add_actor_column(self):
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diff changeset
217 # update existing tables to have the new actor column
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diff changeset
218 tables = self.database_schema['tables']
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diff changeset
219 for name in tables:
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diff changeset
220 self.sql('ALTER TABLE _%s add __actor VARCHAR(255)'%name)
2077
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diff changeset
221
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diff changeset
222 def __repr__(self):
1906
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diff changeset
223 return '<roundpsycopgsql 0x%x>' % id(self)
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parents:
diff changeset
224
3687
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diff changeset
225 def sql_commit(self, fail_ok=False):
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diff changeset
226 ''' Actually commit to the database.
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diff changeset
227 '''
4421
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diff changeset
228 logging.getLogger('roundup.hyperdb').info('commit')
3687
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diff changeset
229
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
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diff changeset
230 try:
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
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diff changeset
231 self.conn.commit()
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diff changeset
232 except psycopg.ProgrammingError, message:
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diff changeset
233 # we've been instructed that this commit is allowed to fail
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
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diff changeset
234 if fail_ok and str(message).endswith('could not serialize '
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
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diff changeset
235 'access due to concurrent update'):
4421
67bef70ab9b9 - more logger fixes, sorry for the noise.
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parents: 4420
diff changeset
236 logging.getLogger('roundup.hyperdb').info(
67bef70ab9b9 - more logger fixes, sorry for the noise.
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diff changeset
237 'commit FAILED, but fail_ok')
3687
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
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parents: 3685
diff changeset
238 else:
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
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parents: 3685
diff changeset
239 raise
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
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diff changeset
240
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
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diff changeset
241 # open a new cursor for subsequent work
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diff changeset
242 self.cursor = self.conn.cursor()
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diff changeset
243
1873
f63aa57386b0 Backend improvements.
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parents:
diff changeset
244 def sql_stringquote(self, value):
1906
f255363e6d97 PostgreSQL backend lands.
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diff changeset
245 ''' psycopg.QuotedString returns a "buffer" object with the
f255363e6d97 PostgreSQL backend lands.
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parents: 1873
diff changeset
246 single-quotes around it... '''
3715
50add98cbbac change as per last message in patch [SF#1429391]
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parents: 3687
diff changeset
247 return str(QuotedString(str(value)))[1:-1]
1906
f255363e6d97 PostgreSQL backend lands.
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diff changeset
248
f255363e6d97 PostgreSQL backend lands.
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diff changeset
249 def sql_index_exists(self, table_name, index_name):
f255363e6d97 PostgreSQL backend lands.
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diff changeset
250 sql = 'select count(*) from pg_indexes where ' \
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diff changeset
251 'tablename=%s and indexname=%s'%(self.arg, self.arg)
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diff changeset
252 self.sql(sql, (table_name, index_name))
1906
f255363e6d97 PostgreSQL backend lands.
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diff changeset
253 return self.cursor.fetchone()[0]
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parents:
diff changeset
254
2424
74474ec41050 argh! backwards compat
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diff changeset
255 def create_class_table(self, spec, create_sequence=1):
2413
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diff changeset
256 if create_sequence:
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diff changeset
257 sql = 'CREATE SEQUENCE _%s_ids'%spec.classname
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diff changeset
258 self.sql(sql)
2098
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diff changeset
259
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
260 return rdbms_common.Database.create_class_table(self, spec)
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diff changeset
261
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
262 def drop_class_table(self, cn):
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263 sql = 'drop table _%s'%cn
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264 self.sql(sql)
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265
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266 sql = 'drop sequence _%s_ids'%cn
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267 self.sql(sql)
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268
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269 def newid(self, classname):
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270 sql = "select nextval('_%s_ids') from dual"%classname
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271 self.sql(sql)
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272 return str(self.cursor.fetchone()[0])
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273
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274 def setid(self, classname, setid):
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275 sql = "select setval('_%s_ids', %s) from dual"%(classname, int(setid))
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276 self.sql(sql)
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277
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278 def clear(self):
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279 rdbms_common.Database.clear(self)
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280
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281 # reset the sequences
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282 for cn in self.classes:
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283 self.cursor.execute('DROP SEQUENCE _%s_ids'%cn)
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284 self.cursor.execute('CREATE SEQUENCE _%s_ids'%cn)
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285
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286 class PostgresqlClass:
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287 order_by_null_values = '(%s is not NULL)'
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288
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289 class Class(PostgresqlClass, rdbms_common.Class):
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290 pass
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291 class IssueClass(PostgresqlClass, rdbms_common.IssueClass):
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292 pass
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293 class FileClass(PostgresqlClass, rdbms_common.FileClass):
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294 pass
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295
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296 # vim: set et sts=4 sw=4 :
Roundup Issue Tracker: http://roundup-tracker.org/