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annotate roundup/backends/back_postgresql.py @ 2537:5455dd2ec6d7 maint-0.7

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merge from HEAD
author Richard Jones <richard@users.sourceforge.net>
date Sat, 03 Jul 2004 23:08:44 +0000
parents e4f06fcbbc89
children 091711fb2f8c 8140fb128088
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1 #
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2 # Copyright (c) 2003 Martynas Sklyzmantas, Andrey Lebedev <andrey@micro.lt>
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3 #
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4 # This module is free software, and you may redistribute it and/or modify
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5 # under the same terms as Python, so long as this copyright message and
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6 # disclaimer are retained in their original form.
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7 #
2005
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8 '''Postgresql backend via psycopg for Roundup.'''
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9 __docformat__ = 'restructuredtext'
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10
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11 import os, shutil, popen2, time
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12 import psycopg
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13
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14 from roundup import hyperdb, date
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15 from roundup.backends import rdbms_common
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16
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17 def db_create(config):
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18 """Clear all database contents and drop database itself"""
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19 if __debug__:
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20 print >> hyperdb.DEBUG, '+++ create database +++'
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21 command = 'CREATE DATABASE %s'%config.POSTGRESQL_DATABASE['database']
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22 db_command(config, command)
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23
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24 def db_nuke(config, fail_ok=0):
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25 """Clear all database contents and drop database itself"""
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26 if __debug__:
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27 print >> hyperdb.DEBUG, '+++ nuke database +++'
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28 command = 'DROP DATABASE %s'% config.POSTGRESQL_DATABASE['database']
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29 db_command(config, command)
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30
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31 if os.path.exists(config.DATABASE):
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32 shutil.rmtree(config.DATABASE)
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33
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34 def db_command(config, command):
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35 '''Perform some sort of database-level command. Retry 10 times if we
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36 fail by conflicting with another user.
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37 '''
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38 template1 = config.POSTGRESQL_DATABASE.copy()
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39 template1['database'] = 'template1'
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40
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41 try:
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42 conn = psycopg.connect(**template1)
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43 except psycopg.OperationalError, message:
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44 raise hyperdb.DatabaseError, message
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45
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46 conn.set_isolation_level(0)
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47 cursor = conn.cursor()
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48 try:
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49 for n in range(10):
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50 if pg_command(cursor, command):
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51 return
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52 finally:
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53 conn.close()
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54 raise RuntimeError, '10 attempts to create database failed'
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55
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56 def pg_command(cursor, command):
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57 '''Execute the postgresql command, which may be blocked by some other
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58 user connecting to the database, and return a true value if it succeeds.
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59 '''
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60 try:
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61 cursor.execute(command)
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62 except psycopg.ProgrammingError, err:
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63 response = str(err).split('\n')[0]
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64 if response.find('FATAL') != -1:
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65 raise RuntimeError, response
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66 elif response.find('ERROR') != -1:
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67 if response.find('is being accessed by other users') == -1:
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68 raise RuntimeError, response
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69 if __debug__:
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70 print >> hyperdb.DEBUG, '+++ SLEEPING +++'
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71 time.sleep(1)
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72 return 0
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73 return 1
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74
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75 def db_exists(config):
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76 """Check if database already exists"""
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77 db = getattr(config, 'POSTGRESQL_DATABASE')
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78 try:
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79 conn = psycopg.connect(**db)
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80 conn.close()
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81 if __debug__:
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82 print >> hyperdb.DEBUG, '+++ database exists +++'
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83 return 1
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84 except:
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85 if __debug__:
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86 print >> hyperdb.DEBUG, '+++ no database +++'
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87 return 0
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88
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89 class Database(rdbms_common.Database):
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90 arg = '%s'
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91
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92 def sql_open_connection(self):
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93 db = getattr(self.config, 'POSTGRESQL_DATABASE')
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94 try:
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95 conn = psycopg.connect(**db)
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96 except psycopg.OperationalError, message:
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97 raise hyperdb.DatabaseError, message
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98
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99 cursor = conn.cursor()
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100
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101 return (conn, cursor)
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102
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103 def open_connection(self):
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104 if not db_exists(self.config):
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105 db_create(self.config)
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106
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107 if __debug__:
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108 print >>hyperdb.DEBUG, '+++ open database connection +++'
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109
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110 self.conn, self.cursor = self.sql_open_connection()
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111
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112 try:
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113 self.load_dbschema()
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114 except:
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115 self.rollback()
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116 self.init_dbschema()
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117 self.sql("CREATE TABLE schema (schema TEXT)")
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118 self.sql("CREATE TABLE dual (dummy integer)")
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119 self.sql("insert into dual values (1)")
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120 self.create_version_2_tables()
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121
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122 def create_version_2_tables(self):
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123 # OTK store
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124 self.cursor.execute('''CREATE TABLE otks (otk_key VARCHAR(255),
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125 otk_value VARCHAR(255), otk_time REAL)''')
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126 self.cursor.execute('CREATE INDEX otks_key_idx ON otks(otk_key)')
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127
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128 # Sessions store
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129 self.cursor.execute('''CREATE TABLE sessions (
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130 session_key VARCHAR(255), session_time REAL,
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131 session_value VARCHAR(255))''')
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132 self.cursor.execute('''CREATE INDEX sessions_key_idx ON
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133 sessions(session_key)''')
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134
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135 # full-text indexing store
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136 self.cursor.execute('CREATE SEQUENCE ___textids_ids')
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137 self.cursor.execute('''CREATE TABLE __textids (
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138 _textid integer primary key, _class VARCHAR(255),
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139 _itemid VARCHAR(255), _prop VARCHAR(255))''')
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140 self.cursor.execute('''CREATE TABLE __words (_word VARCHAR(30),
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141 _textid integer)''')
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142 self.cursor.execute('CREATE INDEX words_word_idx ON __words(_word)')
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143
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144 def fix_version_2_tables(self):
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145 # Convert journal date column to TIMESTAMP, params column to TEXT
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146 self._convert_journal_tables()
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147
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148 # Convert all String properties to TEXT
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149 self._convert_string_properties()
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150
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151 # convert session / OTK *_time columns to REAL
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152 c = self.cursor
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153 for name in ('otk', 'session'):
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154 c.execute('drop index %ss_key_idx'%name)
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155 c.execute('drop table %ss'%name)
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156 c.execute('''CREATE TABLE %ss (%s_key VARCHAR(255),
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157 %s_value VARCHAR(255), %s_time REAL)'''%(name, name, name,
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158 name))
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159 c.execute('CREATE INDEX %ss_key_idx ON %ss(%s_key)'%(name, name,
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160 name))
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161
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162 def add_actor_column(self):
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163 # update existing tables to have the new actor column
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164 tables = self.database_schema['tables']
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165 for name in tables.keys():
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166 self.cursor.execute('ALTER TABLE _%s add __actor '
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167 'VARCHAR(255)'%name)
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168
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169 def __repr__(self):
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170 return '<roundpsycopgsql 0x%x>' % id(self)
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171
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172 def sql_stringquote(self, value):
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173 ''' psycopg.QuotedString returns a "buffer" object with the
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174 single-quotes around it... '''
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175 return str(psycopg.QuotedString(str(value)))[1:-1]
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176
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177 def sql_index_exists(self, table_name, index_name):
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178 sql = 'select count(*) from pg_indexes where ' \
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179 'tablename=%s and indexname=%s'%(self.arg, self.arg)
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180 self.cursor.execute(sql, (table_name, index_name))
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181 return self.cursor.fetchone()[0]
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182
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183 def create_class_table(self, spec, create_sequence=1):
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184 if create_sequence:
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185 sql = 'CREATE SEQUENCE _%s_ids'%spec.classname
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186 if __debug__:
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187 print >>hyperdb.DEBUG, 'create_class_table', (self, sql)
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188 self.cursor.execute(sql)
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189
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190 return rdbms_common.Database.create_class_table(self, spec)
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191
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192 def drop_class_table(self, cn):
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193 sql = 'drop table _%s'%cn
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194 if __debug__:
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195 print >>hyperdb.DEBUG, 'drop_class', (self, sql)
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196 self.cursor.execute(sql)
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197
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198 sql = 'drop sequence _%s_ids'%cn
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199 if __debug__:
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200 print >>hyperdb.DEBUG, 'drop_class', (self, sql)
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201 self.cursor.execute(sql)
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202
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203 def newid(self, classname):
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204 sql = "select nextval('_%s_ids') from dual"%classname
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205 if __debug__:
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206 print >>hyperdb.DEBUG, 'setid', (self, sql)
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207 self.cursor.execute(sql)
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208 return self.cursor.fetchone()[0]
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209
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210 def setid(self, classname, setid):
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211 sql = "select setval('_%s_ids', %s) from dual"%(classname, int(setid))
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212 if __debug__:
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213 print >>hyperdb.DEBUG, 'setid', (self, sql)
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214 self.cursor.execute(sql)
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215
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216
1911
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217 class Class(rdbms_common.Class):
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218 pass
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219 class IssueClass(rdbms_common.IssueClass):
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220 pass
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221 class FileClass(rdbms_common.FileClass):
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222 pass
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223
Roundup Issue Tracker: http://roundup-tracker.org/