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annotate roundup/backends/back_postgresql.py @ 3088:6da931530497

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Add a bunch of $Id$ keywords, clarify the license for the SQL in tsearch2_setup.py.
author Johannes Gijsbers <jlgijsbers@users.sourceforge.net>
date Sat, 08 Jan 2005 11:25:23 +0000
parents b0f5ea4e4dff
children 519b92df37dc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3088
6da931530497 Add a bunch of $Id$ keywords, clarify the license for the SQL in tsearch2_setup.py.
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1 #$Id: back_postgresql.py,v 1.27 2005-01-08 11:25:23 jlgijsbers 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 #
2005
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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 db_create(config):
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19 """Clear all database contents and drop database itself"""
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20 command = 'CREATE DATABASE %s'%config.RDBMS_NAME
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21 config.logging.getLogger('hyperdb').info(command)
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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 command = 'DROP DATABASE %s'% config.RDBMS_NAME
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27 config.logging.getLogger('hyperdb').info(command)
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28 db_command(config, command)
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29
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30 if os.path.exists(config.DATABASE):
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31 shutil.rmtree(config.DATABASE)
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32
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33 def db_command(config, command):
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34 '''Perform some sort of database-level command. Retry 10 times if we
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35 fail by conflicting with another user.
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36 '''
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37 template1 = rdbms_common.connection_dict(config)
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38 template1['database'] = 'template1'
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39
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40 try:
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41 conn = psycopg.connect(**template1)
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42 except psycopg.OperationalError, message:
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43 raise hyperdb.DatabaseError, message
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44
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45 conn.set_isolation_level(0)
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46 cursor = conn.cursor()
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47 try:
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48 for n in range(10):
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49 if pg_command(cursor, command):
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50 return
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51 finally:
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52 conn.close()
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53 raise RuntimeError, '10 attempts to create database failed'
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54
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55 def pg_command(cursor, command):
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56 '''Execute the postgresql command, which may be blocked by some other
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57 user connecting to the database, and return a true value if it succeeds.
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58 '''
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59 try:
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60 cursor.execute(command)
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61 except psycopg.ProgrammingError, err:
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62 response = str(err).split('\n')[0]
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63 if response.find('FATAL') != -1:
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64 raise RuntimeError, response
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65 elif response.find('ERROR') != -1:
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66 if response.find('is being accessed by other users') == -1:
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67 raise RuntimeError, response
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68 time.sleep(1)
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69 return 0
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70 return 1
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71
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72 def db_exists(config):
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73 """Check if database already exists"""
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74 db = rdbms_common.connection_dict(config, 'database')
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75 try:
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76 conn = psycopg.connect(**db)
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77 conn.close()
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78 return 1
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79 except:
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80 return 0
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81
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82 class Database(rdbms_common.Database):
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83 arg = '%s'
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84
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85 # used by some code to switch styles of query
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86 implements_intersect = 1
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87
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88 def sql_open_connection(self):
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89 db = rdbms_common.connection_dict(self.config, 'database')
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90 self.config.logging.getLogger('hyperdb').info('open database %r'%(
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91 db['database'],))
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92 try:
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93 conn = psycopg.connect(**db)
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94 except psycopg.OperationalError, message:
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95 raise hyperdb.DatabaseError, message
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96
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97 cursor = conn.cursor()
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98
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99 return (conn, cursor)
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100
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101 def open_connection(self):
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102 if not db_exists(self.config):
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103 db_create(self.config)
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104
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105 self.conn, self.cursor = self.sql_open_connection()
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106
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107 try:
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108 self.load_dbschema()
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109 except psycopg.ProgrammingError, message:
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110 if str(message).find('"schema" does not exist') == -1:
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111 raise
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112 self.rollback()
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113 self.init_dbschema()
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114 self.sql("CREATE TABLE schema (schema TEXT)")
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115 self.sql("CREATE TABLE dual (dummy integer)")
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116 self.sql("insert into dual values (1)")
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117 self.create_version_2_tables()
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118
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119 def create_version_2_tables(self):
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120 # OTK store
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121 self.sql('''CREATE TABLE otks (otk_key VARCHAR(255),
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122 otk_value TEXT, otk_time REAL)''')
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123 self.sql('CREATE INDEX otks_key_idx ON otks(otk_key)')
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124
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125 # Sessions store
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126 self.sql('''CREATE TABLE sessions (
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127 session_key VARCHAR(255), session_time REAL,
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128 session_value TEXT)''')
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129 self.sql('''CREATE INDEX sessions_key_idx ON
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130 sessions(session_key)''')
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131
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132 # full-text indexing store
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133 self.sql('CREATE SEQUENCE ___textids_ids')
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134 self.sql('''CREATE TABLE __textids (
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135 _textid integer primary key, _class VARCHAR(255),
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136 _itemid VARCHAR(255), _prop VARCHAR(255))''')
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137 self.sql('''CREATE TABLE __words (_word VARCHAR(30),
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138 _textid integer)''')
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139 self.sql('CREATE INDEX words_word_idx ON __words(_word)')
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140
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141 def fix_version_2_tables(self):
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142 # Convert journal date column to TIMESTAMP, params column to TEXT
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143 self._convert_journal_tables()
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144
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145 # Convert all String properties to TEXT
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146 self._convert_string_properties()
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147
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148 # convert session / OTK *_time columns to REAL
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149 for name in ('otk', 'session'):
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150 self.sql('drop index %ss_key_idx'%name)
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151 self.sql('drop table %ss'%name)
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152 self.sql('''CREATE TABLE %ss (%s_key VARCHAR(255),
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153 %s_value VARCHAR(255), %s_time REAL)'''%(name, name, name,
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154 name))
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155 self.sql('CREATE INDEX %ss_key_idx ON %ss(%s_key)'%(name, name,
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156 name))
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157
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158 def fix_version_3_tables(self):
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159 rdbms_common.Database.fix_version_3_tables(self)
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160 self.sql('''CREATE INDEX words_both_idx ON public.__words
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161 USING btree (_word, _textid)''')
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162
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163 def add_actor_column(self):
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164 # update existing tables to have the new actor column
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165 tables = self.database_schema['tables']
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166 for name in tables.keys():
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167 self.sql('ALTER TABLE _%s add __actor 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.sql(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 self.sql(sql)
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187
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188 return rdbms_common.Database.create_class_table(self, spec)
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189
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190 def drop_class_table(self, cn):
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191 sql = 'drop table _%s'%cn
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192 self.sql(sql)
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193
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194 sql = 'drop sequence _%s_ids'%cn
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195 self.sql(sql)
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196
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197 def newid(self, classname):
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198 sql = "select nextval('_%s_ids') from dual"%classname
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199 self.sql(sql)
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200 return self.cursor.fetchone()[0]
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201
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202 def setid(self, classname, setid):
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203 sql = "select setval('_%s_ids', %s) from dual"%(classname, int(setid))
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204 self.sql(sql)
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205
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206
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207 class Class(rdbms_common.Class):
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208 pass
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209 class IssueClass(rdbms_common.IssueClass):
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210 pass
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211 class FileClass(rdbms_common.FileClass):
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212 pass
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213
Roundup Issue Tracker: http://roundup-tracker.org/