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annotate roundup/backends/back_postgresql.py @ 3099:519b92df37dc

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handle ~/.my.cnf files for MySQL defaults [SF#1096031]
author Richard Jones <richard@users.sourceforge.net>
date Thu, 13 Jan 2005 05:02:19 +0000
parents 6da931530497
children 57b60bda9473
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1 #$Id: back_postgresql.py,v 1.28 2005-01-13 05:02:18 richard Exp $
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2 #
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3 # Copyright (c) 2003 Martynas Sklyzmantas, Andrey Lebedev <andrey@micro.lt>
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4 #
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5 # This module is free software, and you may redistribute it and/or modify
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6 # under the same terms as Python, so long as this copyright message and
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7 # disclaimer are retained in their original form.
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8 #
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9 '''Postgresql backend via psycopg for Roundup.'''
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10 __docformat__ = 'restructuredtext'
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11
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12 import os, shutil, popen2, time
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13 import psycopg
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14
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15 from roundup import hyperdb, date
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16 from roundup.backends import rdbms_common
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17
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18 def connection_dict(config, dbnamestr=None):
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19 ''' read_default_group is MySQL-specific, ignore it '''
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20 d = rdbms_common.connection_dict(config, dbnamestr)
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21 if d.has_key('read_default_group'):
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22 del d['read_default_group']
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23 if d.has_key('read_default_file'):
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24 del d['read_default_file']
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25 return d
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26
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27 def db_create(config):
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28 """Clear all database contents and drop database itself"""
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29 command = 'CREATE DATABASE %s'%config.RDBMS_NAME
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30 config.logging.getLogger('hyperdb').info(command)
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31 db_command(config, command)
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32
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33 def db_nuke(config, fail_ok=0):
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34 """Clear all database contents and drop database itself"""
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35 command = 'DROP DATABASE %s'% config.RDBMS_NAME
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36 config.logging.getLogger('hyperdb').info(command)
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37 db_command(config, command)
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38
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39 if os.path.exists(config.DATABASE):
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40 shutil.rmtree(config.DATABASE)
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41
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42 def db_command(config, command):
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43 '''Perform some sort of database-level command. Retry 10 times if we
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44 fail by conflicting with another user.
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45 '''
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46 template1 = connection_dict(config)
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47 template1['database'] = 'template1'
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48
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49 try:
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50 conn = psycopg.connect(**template1)
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51 except psycopg.OperationalError, message:
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52 raise hyperdb.DatabaseError, message
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53
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54 conn.set_isolation_level(0)
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55 cursor = conn.cursor()
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56 try:
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57 for n in range(10):
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58 if pg_command(cursor, command):
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59 return
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60 finally:
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61 conn.close()
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62 raise RuntimeError, '10 attempts to create database failed'
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63
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64 def pg_command(cursor, command):
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65 '''Execute the postgresql command, which may be blocked by some other
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66 user connecting to the database, and return a true value if it succeeds.
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67 '''
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68 try:
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69 cursor.execute(command)
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70 except psycopg.ProgrammingError, err:
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71 response = str(err).split('\n')[0]
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72 if response.find('FATAL') != -1:
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73 raise RuntimeError, response
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74 elif response.find('ERROR') != -1:
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75 if response.find('is being accessed by other users') == -1:
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76 raise RuntimeError, response
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77 time.sleep(1)
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78 return 0
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79 return 1
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80
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81 def db_exists(config):
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82 """Check if database already exists"""
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83 db = connection_dict(config, 'database')
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84 try:
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85 conn = psycopg.connect(**db)
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86 conn.close()
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87 return 1
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88 except:
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89 return 0
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90
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91 class Database(rdbms_common.Database):
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92 arg = '%s'
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93
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94 # used by some code to switch styles of query
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95 implements_intersect = 1
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96
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97 def sql_open_connection(self):
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98 db = connection_dict(self.config, 'database')
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99 self.config.logging.getLogger('hyperdb').info('open database %r'%(
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100 db['database'],))
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101 try:
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102 conn = psycopg.connect(**db)
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103 except psycopg.OperationalError, message:
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104 raise hyperdb.DatabaseError, message
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105
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106 cursor = conn.cursor()
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107
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108 return (conn, cursor)
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109
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110 def open_connection(self):
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111 if not db_exists(self.config):
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112 db_create(self.config)
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113
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114 self.conn, self.cursor = self.sql_open_connection()
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115
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116 try:
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117 self.load_dbschema()
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118 except psycopg.ProgrammingError, message:
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119 if str(message).find('"schema" does not exist') == -1:
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120 raise
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121 self.rollback()
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122 self.init_dbschema()
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123 self.sql("CREATE TABLE schema (schema TEXT)")
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124 self.sql("CREATE TABLE dual (dummy integer)")
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125 self.sql("insert into dual values (1)")
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126 self.create_version_2_tables()
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127
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128 def create_version_2_tables(self):
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129 # OTK store
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130 self.sql('''CREATE TABLE otks (otk_key VARCHAR(255),
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131 otk_value TEXT, otk_time REAL)''')
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132 self.sql('CREATE INDEX otks_key_idx ON otks(otk_key)')
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133
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134 # Sessions store
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135 self.sql('''CREATE TABLE sessions (
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136 session_key VARCHAR(255), session_time REAL,
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137 session_value TEXT)''')
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138 self.sql('''CREATE INDEX sessions_key_idx ON
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139 sessions(session_key)''')
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140
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141 # full-text indexing store
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142 self.sql('CREATE SEQUENCE ___textids_ids')
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143 self.sql('''CREATE TABLE __textids (
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144 _textid integer primary key, _class VARCHAR(255),
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145 _itemid VARCHAR(255), _prop VARCHAR(255))''')
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146 self.sql('''CREATE TABLE __words (_word VARCHAR(30),
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147 _textid integer)''')
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148 self.sql('CREATE INDEX words_word_idx ON __words(_word)')
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149
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150 def fix_version_2_tables(self):
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151 # Convert journal date column to TIMESTAMP, params column to TEXT
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152 self._convert_journal_tables()
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153
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154 # Convert all String properties to TEXT
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155 self._convert_string_properties()
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156
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157 # convert session / OTK *_time columns to REAL
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158 for name in ('otk', 'session'):
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159 self.sql('drop index %ss_key_idx'%name)
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160 self.sql('drop table %ss'%name)
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161 self.sql('''CREATE TABLE %ss (%s_key VARCHAR(255),
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162 %s_value VARCHAR(255), %s_time REAL)'''%(name, name, name,
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163 name))
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164 self.sql('CREATE INDEX %ss_key_idx ON %ss(%s_key)'%(name, name,
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165 name))
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166
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167 def fix_version_3_tables(self):
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168 rdbms_common.Database.fix_version_3_tables(self)
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169 self.sql('''CREATE INDEX words_both_idx ON public.__words
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170 USING btree (_word, _textid)''')
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171
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172 def add_actor_column(self):
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173 # update existing tables to have the new actor column
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174 tables = self.database_schema['tables']
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175 for name in tables.keys():
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176 self.sql('ALTER TABLE _%s add __actor VARCHAR(255)'%name)
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177
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178 def __repr__(self):
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179 return '<roundpsycopgsql 0x%x>' % id(self)
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180
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181 def sql_stringquote(self, value):
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182 ''' psycopg.QuotedString returns a "buffer" object with the
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183 single-quotes around it... '''
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184 return str(psycopg.QuotedString(str(value)))[1:-1]
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185
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186 def sql_index_exists(self, table_name, index_name):
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187 sql = 'select count(*) from pg_indexes where ' \
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188 'tablename=%s and indexname=%s'%(self.arg, self.arg)
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189 self.sql(sql, (table_name, index_name))
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190 return self.cursor.fetchone()[0]
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191
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192 def create_class_table(self, spec, create_sequence=1):
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193 if create_sequence:
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194 sql = 'CREATE SEQUENCE _%s_ids'%spec.classname
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195 self.sql(sql)
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196
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197 return rdbms_common.Database.create_class_table(self, spec)
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198
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199 def drop_class_table(self, cn):
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200 sql = 'drop table _%s'%cn
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201 self.sql(sql)
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202
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203 sql = 'drop sequence _%s_ids'%cn
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204 self.sql(sql)
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205
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206 def newid(self, classname):
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207 sql = "select nextval('_%s_ids') from dual"%classname
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208 self.sql(sql)
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209 return self.cursor.fetchone()[0]
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210
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211 def setid(self, classname, setid):
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212 sql = "select setval('_%s_ids', %s) from dual"%(classname, int(setid))
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213 self.sql(sql)
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214
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215
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216 class Class(rdbms_common.Class):
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217 pass
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218 class IssueClass(rdbms_common.IssueClass):
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219 pass
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220 class FileClass(rdbms_common.FileClass):
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221 pass
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222
Roundup Issue Tracker: http://roundup-tracker.org/