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annotate roundup/backends/back_postgresql.py @ 3061:b0f5ea4e4dff

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First fixes for Python 2.1 compatibility: * don't use booleans * don't use a string > 1 char with 'in' * use has_key instead of 'in' for dictionaries
author Johannes Gijsbers <jlgijsbers@users.sourceforge.net>
date Wed, 05 Jan 2005 21:50:03 +0000
parents d9b4224f955c
children 6da931530497 406862712b7d
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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 command = 'CREATE DATABASE %s'%config.RDBMS_NAME
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20 config.logging.getLogger('hyperdb').info(command)
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21 db_command(config, command)
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22
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23 def db_nuke(config, fail_ok=0):
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24 """Clear all database contents and drop database itself"""
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25 command = 'DROP DATABASE %s'% config.RDBMS_NAME
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26 config.logging.getLogger('hyperdb').info(command)
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27 db_command(config, command)
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28
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29 if os.path.exists(config.DATABASE):
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30 shutil.rmtree(config.DATABASE)
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31
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32 def db_command(config, command):
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33 '''Perform some sort of database-level command. Retry 10 times if we
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34 fail by conflicting with another user.
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35 '''
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36 template1 = rdbms_common.connection_dict(config)
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37 template1['database'] = 'template1'
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38
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39 try:
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40 conn = psycopg.connect(**template1)
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41 except psycopg.OperationalError, message:
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42 raise hyperdb.DatabaseError, message
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43
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44 conn.set_isolation_level(0)
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45 cursor = conn.cursor()
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46 try:
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47 for n in range(10):
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48 if pg_command(cursor, command):
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49 return
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50 finally:
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51 conn.close()
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52 raise RuntimeError, '10 attempts to create database failed'
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53
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54 def pg_command(cursor, command):
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55 '''Execute the postgresql command, which may be blocked by some other
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56 user connecting to the database, and return a true value if it succeeds.
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57 '''
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58 try:
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59 cursor.execute(command)
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60 except psycopg.ProgrammingError, err:
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61 response = str(err).split('\n')[0]
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62 if response.find('FATAL') != -1:
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63 raise RuntimeError, response
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64 elif response.find('ERROR') != -1:
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65 if response.find('is being accessed by other users') == -1:
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66 raise RuntimeError, response
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67 time.sleep(1)
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68 return 0
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69 return 1
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70
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71 def db_exists(config):
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72 """Check if database already exists"""
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73 db = rdbms_common.connection_dict(config, 'database')
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74 try:
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75 conn = psycopg.connect(**db)
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76 conn.close()
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77 return 1
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78 except:
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79 return 0
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80
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81 class Database(rdbms_common.Database):
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82 arg = '%s'
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83
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84 # used by some code to switch styles of query
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85 implements_intersect = 1
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86
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87 def sql_open_connection(self):
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88 db = rdbms_common.connection_dict(self.config, 'database')
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89 self.config.logging.getLogger('hyperdb').info('open database %r'%(
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90 db['database'],))
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91 try:
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92 conn = psycopg.connect(**db)
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93 except psycopg.OperationalError, message:
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94 raise hyperdb.DatabaseError, message
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95
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96 cursor = conn.cursor()
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97
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98 return (conn, cursor)
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99
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100 def open_connection(self):
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101 if not db_exists(self.config):
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102 db_create(self.config)
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103
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104 self.conn, self.cursor = self.sql_open_connection()
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105
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106 try:
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107 self.load_dbschema()
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108 except psycopg.ProgrammingError, message:
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109 if str(message).find('"schema" does not exist') == -1:
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110 raise
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111 self.rollback()
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112 self.init_dbschema()
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113 self.sql("CREATE TABLE schema (schema TEXT)")
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114 self.sql("CREATE TABLE dual (dummy integer)")
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115 self.sql("insert into dual values (1)")
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116 self.create_version_2_tables()
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117
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118 def create_version_2_tables(self):
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119 # OTK store
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120 self.sql('''CREATE TABLE otks (otk_key VARCHAR(255),
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121 otk_value TEXT, otk_time REAL)''')
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122 self.sql('CREATE INDEX otks_key_idx ON otks(otk_key)')
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123
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124 # Sessions store
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125 self.sql('''CREATE TABLE sessions (
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126 session_key VARCHAR(255), session_time REAL,
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127 session_value TEXT)''')
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128 self.sql('''CREATE INDEX sessions_key_idx ON
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129 sessions(session_key)''')
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130
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131 # full-text indexing store
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132 self.sql('CREATE SEQUENCE ___textids_ids')
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133 self.sql('''CREATE TABLE __textids (
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134 _textid integer primary key, _class VARCHAR(255),
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135 _itemid VARCHAR(255), _prop VARCHAR(255))''')
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136 self.sql('''CREATE TABLE __words (_word VARCHAR(30),
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137 _textid integer)''')
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138 self.sql('CREATE INDEX words_word_idx ON __words(_word)')
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139
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140 def fix_version_2_tables(self):
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141 # Convert journal date column to TIMESTAMP, params column to TEXT
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142 self._convert_journal_tables()
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143
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144 # Convert all String properties to TEXT
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145 self._convert_string_properties()
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146
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147 # convert session / OTK *_time columns to REAL
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148 for name in ('otk', 'session'):
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149 self.sql('drop index %ss_key_idx'%name)
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150 self.sql('drop table %ss'%name)
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151 self.sql('''CREATE TABLE %ss (%s_key VARCHAR(255),
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152 %s_value VARCHAR(255), %s_time REAL)'''%(name, name, name,
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153 name))
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154 self.sql('CREATE INDEX %ss_key_idx ON %ss(%s_key)'%(name, name,
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155 name))
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156
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157 def fix_version_3_tables(self):
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158 rdbms_common.Database.fix_version_3_tables(self)
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159 self.sql('''CREATE INDEX words_both_idx ON public.__words
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160 USING btree (_word, _textid)''')
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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.sql('ALTER TABLE _%s add __actor VARCHAR(255)'%name)
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167
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168 def __repr__(self):
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169 return '<roundpsycopgsql 0x%x>' % id(self)
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170
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171 def sql_stringquote(self, value):
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172 ''' psycopg.QuotedString returns a "buffer" object with the
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173 single-quotes around it... '''
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174 return str(psycopg.QuotedString(str(value)))[1:-1]
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175
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176 def sql_index_exists(self, table_name, index_name):
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177 sql = 'select count(*) from pg_indexes where ' \
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178 'tablename=%s and indexname=%s'%(self.arg, self.arg)
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179 self.sql(sql, (table_name, index_name))
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180 return self.cursor.fetchone()[0]
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181
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182 def create_class_table(self, spec, create_sequence=1):
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183 if create_sequence:
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184 sql = 'CREATE SEQUENCE _%s_ids'%spec.classname
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185 self.sql(sql)
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186
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187 return rdbms_common.Database.create_class_table(self, spec)
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188
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189 def drop_class_table(self, cn):
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190 sql = 'drop table _%s'%cn
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191 self.sql(sql)
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192
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193 sql = 'drop sequence _%s_ids'%cn
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194 self.sql(sql)
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195
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196 def newid(self, classname):
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197 sql = "select nextval('_%s_ids') from dual"%classname
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198 self.sql(sql)
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199 return self.cursor.fetchone()[0]
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200
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201 def setid(self, classname, setid):
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202 sql = "select setval('_%s_ids', %s) from dual"%(classname, int(setid))
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203 self.sql(sql)
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204
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205
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206 class Class(rdbms_common.Class):
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207 pass
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208 class IssueClass(rdbms_common.IssueClass):
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209 pass
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210 class FileClass(rdbms_common.FileClass):
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211 pass
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212
Roundup Issue Tracker: http://roundup-tracker.org/