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annotate roundup/backends/back_sqlite.py @ 2144:6c1caf81a108

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author Richard Jones <richard@users.sourceforge.net>
date Fri, 26 Mar 2004 06:38:10 +0000
parents c49495585c44
children 7e595abb781e
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2144
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1 # $Id: back_sqlite.py,v 1.22 2004-03-26 06:38:10 richard Exp $
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2 '''Implements a backend for SQLite.
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3
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4 See https://pysqlite.sourceforge.net/ for pysqlite info
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5
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6
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7 NOTE: we use the rdbms_common table creation methods which define datatypes
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8 for the columns, but sqlite IGNORES these specifications.
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9 '''
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10 __docformat__ = 'restructuredtext'
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11
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12 import os, base64, marshal
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13
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14 from roundup import hyperdb, date, password
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15 from roundup.backends import rdbms_common
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16 import sqlite
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17
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18 class Database(rdbms_common.Database):
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19 # char to use for positional arguments
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20 arg = '%s'
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21
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22 hyperdb_to_sql_value = {
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23 hyperdb.String : str,
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24 hyperdb.Date : lambda x: x.serialise(),
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25 hyperdb.Link : int,
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26 hyperdb.Interval : lambda x: x.serialise(),
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27 hyperdb.Password : str,
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28 hyperdb.Boolean : int,
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29 hyperdb.Number : lambda x: x,
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30 }
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31 sql_to_hyperdb_value = {
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32 hyperdb.String : str,
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33 hyperdb.Date : lambda x: date.Date(str(x)),
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34 # hyperdb.Link : int, # XXX numeric ids
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35 hyperdb.Link : str,
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36 hyperdb.Interval : date.Interval,
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37 hyperdb.Password : lambda x: password.Password(encrypted=x),
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38 hyperdb.Boolean : int,
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39 hyperdb.Number : rdbms_common._num_cvt,
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40 }
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41
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42 def sql_open_connection(self):
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43 db = os.path.join(self.config.DATABASE, 'db')
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44 conn = sqlite.connect(db=db)
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45 cursor = conn.cursor()
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46 return (conn, cursor)
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47
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48 def open_connection(self):
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49 # ensure files are group readable and writable
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50 os.umask(0002)
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51
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52 (self.conn, self.cursor) = self.sql_open_connection()
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53
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54 try:
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55 self.load_dbschema()
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56 except sqlite.DatabaseError, error:
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57 if str(error) != 'no such table: schema':
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58 raise
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59 self.init_dbschema()
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60 self.cursor.execute('create table schema (schema varchar)')
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61 self.cursor.execute('create table ids (name varchar, num integer)')
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62 self.cursor.execute('create index ids_name_idx on ids(name)')
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63 self.create_version_2_tables()
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64
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65 def create_version_2_tables(self):
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66 self.cursor.execute('create table otks (otk_key varchar, '
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67 'otk_value varchar, otk_time integer)')
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68 self.cursor.execute('create index otks_key_idx on otks(otk_key)')
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69 self.cursor.execute('create table sessions (session_key varchar, '
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70 'session_time integer, session_value varchar)')
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71 self.cursor.execute('create index sessions_key_idx on '
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72 'sessions(session_key)')
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73
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74 # full-text indexing store
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75 self.cursor.execute('CREATE TABLE __textids (_class varchar, '
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76 '_itemid varchar, _prop varchar, _textid integer primary key) ')
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77 self.cursor.execute('CREATE TABLE __words (_word varchar, '
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78 '_textid integer)')
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79 self.cursor.execute('CREATE INDEX words_word_ids ON __words(_word)')
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80 sql = 'insert into ids (name, num) values (%s,%s)'%(self.arg, self.arg)
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81 self.cursor.execute(sql, ('__textids', 1))
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82
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83 def add_actor_column(self):
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84 # update existing tables to have the new actor column
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85 tables = self.database_schema['tables']
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86 for classname, spec in self.classes.items():
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87 if tables.has_key(classname):
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88 dbspec = tables[classname]
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89 self.update_class(spec, dbspec, force=1, adding_actor=1)
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90 # we've updated - don't try again
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91 tables[classname] = spec.schema()
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92
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93 def update_class(self, spec, old_spec, force=0, adding_actor=0):
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94 ''' Determine the differences between the current spec and the
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95 database version of the spec, and update where necessary.
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96
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97 If 'force' is true, update the database anyway.
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98
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99 SQLite doesn't have ALTER TABLE, so we have to copy and
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100 regenerate the tables with the new schema.
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101 '''
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102 new_has = spec.properties.has_key
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103 new_spec = spec.schema()
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104 new_spec[1].sort()
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105 old_spec[1].sort()
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106 if not force and new_spec == old_spec:
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107 # no changes
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108 return 0
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109
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110 if __debug__:
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111 print >>hyperdb.DEBUG, 'update_class FIRING for', spec.classname
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112
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113 # detect multilinks that have been removed, and drop their table
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114 old_has = {}
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115 for name, prop in old_spec[1]:
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116 old_has[name] = 1
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117 if new_has(name) or not isinstance(prop, hyperdb.Multilink):
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118 continue
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119 # it's a multilink, and it's been removed - drop the old
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120 # table. First drop indexes.
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121 self.drop_multilink_table_indexes(spec.classname, ml)
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122 sql = 'drop table %s_%s'%(spec.classname, prop)
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123 if __debug__:
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124 print >>hyperdb.DEBUG, 'update_class', (self, sql)
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125 self.cursor.execute(sql)
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126 old_has = old_has.has_key
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127
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128 # now figure how we populate the new table
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129 if adding_actor:
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130 fetch = ['_activity', '_creation', '_creator']
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131 else:
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132 fetch = ['_actor', '_activity', '_creation', '_creator']
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133 properties = spec.getprops()
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134 for propname,x in new_spec[1]:
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135 prop = properties[propname]
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diff changeset
136 if isinstance(prop, hyperdb.Multilink):
2137
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diff changeset
137 if not old_has(propname):
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138 # we need to create the new table
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139 self.create_multilink_table(spec, propname)
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diff changeset
140 elif force:
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141 tn = '%s_%s'%(spec.classname, propname)
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142 # grabe the current values
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143 sql = 'select linkid, nodeid from %s'%tn
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144 if __debug__:
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145 print >>hyperdb.DEBUG, 'update_class', (self, sql)
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146 self.cursor.execute(sql)
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diff changeset
147 rows = self.cursor.fetchall()
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148
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149 # drop the old table
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150 self.drop_multilink_table_indexes(spec.classname, propname)
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151 sql = 'drop table %s'%tn
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diff changeset
152 if __debug__:
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153 print >>hyperdb.DEBUG, 'migration', (self, sql)
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154 self.cursor.execute(sql)
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155
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156 # re-create and populate the new table
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157 self.create_multilink_table(spec, propname)
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158 sql = '''insert into %s (linkid, nodeid) values
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diff changeset
159 (%s, %s)'''%(tn, self.arg, self.arg)
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diff changeset
160 for linkid, nodeid in rows:
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161 self.cursor.execute(sql, (int(linkid), int(nodeid)))
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162 elif old_has(propname):
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163 # we copy this col over from the old table
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164 fetch.append('_'+propname)
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165
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166 # select the data out of the old table
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167 fetch.append('id')
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168 fetch.append('__retired__')
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169 fetchcols = ','.join(fetch)
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170 cn = spec.classname
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diff changeset
171 sql = 'select %s from _%s'%(fetchcols, cn)
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172 if __debug__:
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173 print >>hyperdb.DEBUG, 'update_class', (self, sql)
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174 self.cursor.execute(sql)
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diff changeset
175 olddata = self.cursor.fetchall()
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176
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diff changeset
177 # TODO: update all the other index dropping code
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diff changeset
178 self.drop_class_table_indexes(cn, old_spec[0])
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179
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diff changeset
180 # drop the old table
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diff changeset
181 if __debug__:
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diff changeset
182 print >>hyperdb.DEBUG, 'update_class "drop table _%s"'%cn
2077
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183 self.cursor.execute('drop table _%s'%cn)
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184
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diff changeset
185 # create the new table
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diff changeset
186 self.create_class_table(spec)
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187
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diff changeset
188 if olddata:
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diff changeset
189 # do the insert of the old data - the new columns will have
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diff changeset
190 # NULL values
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diff changeset
191 args = ','.join([self.arg for x in fetch])
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diff changeset
192 sql = 'insert into _%s (%s) values (%s)'%(cn, fetchcols, args)
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diff changeset
193 if __debug__:
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194 print >>hyperdb.DEBUG, 'update_class', (self, sql, olddata[0])
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diff changeset
195 for entry in olddata:
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diff changeset
196 self.cursor.execute(sql, tuple(entry))
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197
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198 return 1
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diff changeset
199
1911
f5c804379c85 fixed ZRoundup - mostly changes to classic template
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diff changeset
200 def sql_close(self):
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diff changeset
201 ''' Squash any error caused by us already having closed the
1236
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202 connection.
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203 '''
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204 try:
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205 self.conn.close()
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diff changeset
206 except sqlite.ProgrammingError, value:
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diff changeset
207 if str(value) != 'close failed - Connection is closed.':
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diff changeset
208 raise
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diff changeset
209
1911
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diff changeset
210 def sql_rollback(self):
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diff changeset
211 ''' Squash any error caused by us having closed the connection (and
1236
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diff changeset
212 therefore not having anything to roll back)
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213 '''
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214 try:
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diff changeset
215 self.conn.rollback()
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diff changeset
216 except sqlite.ProgrammingError, value:
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diff changeset
217 if str(value) != 'rollback failed - Connection is closed.':
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diff changeset
218 raise
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diff changeset
219
1165
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parents:
diff changeset
220 def __repr__(self):
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diff changeset
221 return '<roundlite 0x%x>'%id(self)
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parents:
diff changeset
222
14467c765167 sqlite backend!
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diff changeset
223 def sql_commit(self):
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parents:
diff changeset
224 ''' Actually commit to the database.
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parents:
diff changeset
225
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diff changeset
226 Ignore errors if there's nothing to commit.
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parents:
diff changeset
227 '''
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parents:
diff changeset
228 try:
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parents:
diff changeset
229 self.conn.commit()
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parents:
diff changeset
230 except sqlite.DatabaseError, error:
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parents:
diff changeset
231 if str(error) != 'cannot commit - no transaction is active':
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parents:
diff changeset
232 raise
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parents:
diff changeset
233
1906
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1836
diff changeset
234 def sql_index_exists(self, table_name, index_name):
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diff changeset
235 self.cursor.execute('pragma index_list(%s)'%table_name)
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diff changeset
236 for entry in self.cursor.fetchall():
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diff changeset
237 if entry[1] == index_name:
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diff changeset
238 return 1
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Richard Jones <richard@users.sourceforge.net>
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diff changeset
239 return 0
f255363e6d97 PostgreSQL backend lands.
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diff changeset
240
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
241 # old-skool id generation
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diff changeset
242 def newid(self, classname):
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diff changeset
243 ''' Generate a new id for the given class
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diff changeset
244 '''
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
245 # get the next ID
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
246 sql = 'select num from ids where name=%s'%self.arg
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parents: 2094
diff changeset
247 if __debug__:
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diff changeset
248 print >>hyperdb.DEBUG, 'newid', (self, sql, classname)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
249 self.cursor.execute(sql, (classname, ))
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diff changeset
250 newid = int(self.cursor.fetchone()[0])
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diff changeset
251
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
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diff changeset
252 # update the counter
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parents: 2094
diff changeset
253 sql = 'update ids set num=%s where name=%s'%(self.arg, self.arg)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
254 vals = (int(newid)+1, classname)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2094
diff changeset
255 if __debug__:
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
256 print >>hyperdb.DEBUG, 'newid', (self, sql, vals)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
257 self.cursor.execute(sql, vals)
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diff changeset
258
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
259 # return as string
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
260 return str(newid)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
261
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
262 def setid(self, classname, setid):
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2094
diff changeset
263 ''' Set the id counter: used during import of database
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2094
diff changeset
264
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2094
diff changeset
265 We add one to make it behave like the seqeunces in postgres.
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
266 '''
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2094
diff changeset
267 sql = 'update ids set num=%s where name=%s'%(self.arg, self.arg)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2094
diff changeset
268 vals = (int(setid)+1, classname)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2094
diff changeset
269 if __debug__:
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
270 print >>hyperdb.DEBUG, 'setid', (self, sql, vals)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2094
diff changeset
271 self.cursor.execute(sql, vals)
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diff changeset
272
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
273 def create_class(self, spec):
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
274 rdbms_common.Database.create_class(self, spec)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2094
diff changeset
275 sql = 'insert into ids (name, num) values (%s, %s)'
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2094
diff changeset
276 vals = (spec.classname, 1)
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parents: 2094
diff changeset
277 if __debug__:
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
278 print >>hyperdb.DEBUG, 'create_class', (self, sql, vals)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
279 self.cursor.execute(sql, vals)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2094
diff changeset
280
1911
f5c804379c85 fixed ZRoundup - mostly changes to classic template
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281 class sqliteClass:
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282 def filter(self, search_matches, filterspec, sort=(None,None),
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283 group=(None,None)):
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284 ''' If there's NO matches to a fetch, sqlite returns NULL
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285 instead of nothing
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286 '''
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287 return filter(None, rdbms_common.Class.filter(self, search_matches,
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288 filterspec, sort=sort, group=group))
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289
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290 class Class(sqliteClass, rdbms_common.Class):
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291 pass
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292
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293 class IssueClass(sqliteClass, rdbms_common.IssueClass):
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294 pass
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295
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296 class FileClass(sqliteClass, rdbms_common.FileClass):
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297 pass
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298
1911
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299
Roundup Issue Tracker: http://roundup-tracker.org/