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annotate roundup/backends/back_mysql.py @ 4887:05c857e5dbed

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New rdbms configuration option 'isolation_level' See discussion in http://issues.roundup-tracker.org/issue2550806
author Ralf Schlatterbeck <rsc@runtux.com>
date Sun, 06 Apr 2014 11:11:04 +0200
parents f1fe6fd0aa61
children e424987d294a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 #
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9 '''This module defines a backend implementation for MySQL.
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10
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11
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12 How to implement AUTO_INCREMENT:
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13
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14 mysql> create table foo (num integer auto_increment primary key, name
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15 varchar(255)) AUTO_INCREMENT=1 ENGINE=InnoDB;
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16
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17 ql> insert into foo (name) values ('foo5');
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18 Query OK, 1 row affected (0.00 sec)
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19
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20 mysql> SELECT num FROM foo WHERE num IS NULL;
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21 +-----+
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22 | num |
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23 +-----+
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24 | 4 |
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25 +-----+
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26 1 row in set (0.00 sec)
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27
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28 mysql> SELECT num FROM foo WHERE num IS NULL;
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29 Empty set (0.00 sec)
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30
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31 NOTE: we don't need an index on the id column if it's PRIMARY KEY
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32
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33 '''
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34 __docformat__ = 'restructuredtext'
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36 from roundup.backends.rdbms_common import *
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37 from roundup.backends import rdbms_common
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38 import MySQLdb
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39 import os, shutil
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40 from MySQLdb.constants import ER
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41 import logging
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43 isolation_levels = \
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44 { 'read uncommitted': 'READ UNCOMMITTED'
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45 , 'read committed': 'READ COMMITTED'
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46 , 'repeatable read': 'REPEATABLE READ'
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47 , 'serializable': 'SERIALIZABLE'
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48 }
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49
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50 def connection_dict(config, dbnamestr=None):
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51 d = rdbms_common.connection_dict(config, dbnamestr)
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52 if d.has_key('password'):
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53 d['passwd'] = d['password']
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54 del d['password']
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55 if d.has_key('port'):
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56 d['port'] = int(d['port'])
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57 return d
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58
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59 def db_nuke(config):
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60 """Clear all database contents and drop database itself"""
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61 if db_exists(config):
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62 kwargs = connection_dict(config)
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63 conn = MySQLdb.connect(**kwargs)
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64 try:
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65 conn.select_db(config.RDBMS_NAME)
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66 except:
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67 # no, it doesn't exist
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68 pass
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69 else:
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70 cursor = conn.cursor()
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71 cursor.execute("SHOW TABLES")
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72 tables = cursor.fetchall()
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73 # stupid MySQL bug requires us to drop all the tables first
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74 for table in tables:
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75 command = 'DROP TABLE `%s`'%table[0]
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76 logging.debug(command)
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77 cursor.execute(command)
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78 command = "DROP DATABASE %s"%config.RDBMS_NAME
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79 logging.info(command)
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80 cursor.execute(command)
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81 conn.commit()
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82 conn.close()
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83
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84 if os.path.exists(config.DATABASE):
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85 shutil.rmtree(config.DATABASE)
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86
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87 def db_create(config):
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88 """Create the database."""
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89 kwargs = connection_dict(config)
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90 conn = MySQLdb.connect(**kwargs)
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91 cursor = conn.cursor()
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92 command = "CREATE DATABASE %s"%config.RDBMS_NAME
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93 logging.info(command)
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94 cursor.execute(command)
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95 conn.commit()
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96 conn.close()
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97
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98 def db_exists(config):
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99 """Check if database already exists."""
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100 kwargs = connection_dict(config)
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101 conn = MySQLdb.connect(**kwargs)
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102 try:
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103 try:
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104 conn.select_db(config.RDBMS_NAME)
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105 except MySQLdb.OperationalError:
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106 return 0
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107 finally:
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108 conn.close()
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109 return 1
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110
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111
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112 class Database(Database):
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113 arg = '%s'
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114
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115 # used by some code to switch styles of query
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116 implements_intersect = 0
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117
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118 # Backend for MySQL to use.
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119 # InnoDB is faster, but if you're running <4.0.16 then you'll need to
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120 # use BDB to pass all unit tests.
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121 mysql_backend = 'InnoDB'
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122 #mysql_backend = 'BDB'
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123
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124 hyperdb_to_sql_datatypes = {
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125 hyperdb.String : 'TEXT',
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126 hyperdb.Date : 'DATETIME',
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127 hyperdb.Link : 'INTEGER',
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128 hyperdb.Interval : 'VARCHAR(255)',
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129 hyperdb.Password : 'VARCHAR(255)',
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130 hyperdb.Boolean : 'BOOL',
2099
3837257ca9a5 *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
131 hyperdb.Number : 'REAL',
3837257ca9a5 *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
132 }
3837257ca9a5 *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 2098
diff changeset
133
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
134 hyperdb_to_sql_value = {
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
135 hyperdb.String : str,
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
136 # no fractional seconds for MySQL
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
137 hyperdb.Date : lambda x: x.formal(sep=' '),
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
138 hyperdb.Link : int,
2217
98d3bf8ffb19 store Intervals as two columns (and other fixes
Richard Jones <richard@users.sourceforge.net>
parents: 2166
diff changeset
139 hyperdb.Interval : str,
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
140 hyperdb.Password : str,
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
141 hyperdb.Boolean : int,
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
142 hyperdb.Number : lambda x: x,
2244
ac4f295499a4 fixed journal marshalling in RDBMS backends [SF#943627]
Richard Jones <richard@users.sourceforge.net>
parents: 2240
diff changeset
143 hyperdb.Multilink : lambda x: x, # used in journal marshalling
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
144 }
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
145
2082
c091cacdc505 Finished implementation of session and one-time-key stores for RDBMS backends.
Richard Jones <richard@users.sourceforge.net>
parents: 2077
diff changeset
146 def sql_open_connection(self):
2693
59ea85d47d34 add dbnamestr argument to connection_dict...
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2679
diff changeset
147 kwargs = connection_dict(self.config, 'db')
4059
ef0b4396888a Enhance and simplify logging.
Stefan Seefeld <stefan@seefeld.name>
parents: 3969
diff changeset
148 self.log_info('open database %r'%(kwargs['db'],))
2082
c091cacdc505 Finished implementation of session and one-time-key stores for RDBMS backends.
Richard Jones <richard@users.sourceforge.net>
parents: 2077
diff changeset
149 try:
2634
f47ca4541770 Both RDBMS backends now use the same config.ini section, [rdbms].
Richard Jones <richard@users.sourceforge.net>
parents: 2617
diff changeset
150 conn = MySQLdb.connect(**kwargs)
2082
c091cacdc505 Finished implementation of session and one-time-key stores for RDBMS backends.
Richard Jones <richard@users.sourceforge.net>
parents: 2077
diff changeset
151 except MySQLdb.OperationalError, message:
c091cacdc505 Finished implementation of session and one-time-key stores for RDBMS backends.
Richard Jones <richard@users.sourceforge.net>
parents: 2077
diff changeset
152 raise DatabaseError, message
c091cacdc505 Finished implementation of session and one-time-key stores for RDBMS backends.
Richard Jones <richard@users.sourceforge.net>
parents: 2077
diff changeset
153 cursor = conn.cursor()
3216
27aba1d8fccc merge from maint-0-8
Richard Jones <richard@users.sourceforge.net>
parents: 3155
diff changeset
154 cursor.execute("SET AUTOCOMMIT=0")
4887
05c857e5dbed New rdbms configuration option 'isolation_level'
Ralf Schlatterbeck <rsc@runtux.com>
parents: 4466
diff changeset
155 lvl = isolation_levels [self.config.RDBMS_ISOLATION_LEVEL]
05c857e5dbed New rdbms configuration option 'isolation_level'
Ralf Schlatterbeck <rsc@runtux.com>
parents: 4466
diff changeset
156 cursor.execute("SET SESSION TRANSACTION ISOLATION LEVEL %s" % lvl)
2456
1cd69db95b23 fixed some more mysql 0.6->0.7 upgrade bugs [SF#950410]
Richard Jones <richard@users.sourceforge.net>
parents: 2431
diff changeset
157 cursor.execute("START TRANSACTION")
2082
c091cacdc505 Finished implementation of session and one-time-key stores for RDBMS backends.
Richard Jones <richard@users.sourceforge.net>
parents: 2077
diff changeset
158 return (conn, cursor)
2679
b3f0b7b9d20d for MySQL connection, password argument is called 'passwd'.
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2634
diff changeset
159
2082
c091cacdc505 Finished implementation of session and one-time-key stores for RDBMS backends.
Richard Jones <richard@users.sourceforge.net>
parents: 2077
diff changeset
160 def open_connection(self):
2075
b1704ba7be41 make mysql / postgresql work again. beginnings of otk/session store in rdbmses
Richard Jones <richard@users.sourceforge.net>
parents: 2073
diff changeset
161 # make sure the database actually exists
b1704ba7be41 make mysql / postgresql work again. beginnings of otk/session store in rdbmses
Richard Jones <richard@users.sourceforge.net>
parents: 2073
diff changeset
162 if not db_exists(self.config):
b1704ba7be41 make mysql / postgresql work again. beginnings of otk/session store in rdbmses
Richard Jones <richard@users.sourceforge.net>
parents: 2073
diff changeset
163 db_create(self.config)
b1704ba7be41 make mysql / postgresql work again. beginnings of otk/session store in rdbmses
Richard Jones <richard@users.sourceforge.net>
parents: 2073
diff changeset
164
2082
c091cacdc505 Finished implementation of session and one-time-key stores for RDBMS backends.
Richard Jones <richard@users.sourceforge.net>
parents: 2077
diff changeset
165 self.conn, self.cursor = self.sql_open_connection()
1375
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
166
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
167 try:
2073
261c2e6ceb1e *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 2005
diff changeset
168 self.load_dbschema()
1433
8429095241d7 mysql tests will not be run if there is no chance of passing.
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1415
diff changeset
169 except MySQLdb.OperationalError, message:
8429095241d7 mysql tests will not be run if there is no chance of passing.
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1415
diff changeset
170 if message[0] != ER.NO_DB_ERROR:
8429095241d7 mysql tests will not be run if there is no chance of passing.
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1415
diff changeset
171 raise
1375
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
172 except MySQLdb.ProgrammingError, message:
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
173 if message[0] != ER.NO_SUCH_TABLE:
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
174 raise DatabaseError, message
2075
b1704ba7be41 make mysql / postgresql work again. beginnings of otk/session store in rdbmses
Richard Jones <richard@users.sourceforge.net>
parents: 2073
diff changeset
175 self.init_dbschema()
3929
a472391156ae mysql table creation syntax change
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3858
diff changeset
176 self.sql("CREATE TABLE `schema` (`schema` TEXT) ENGINE=%s"%
1839
06f5b36b201b Fix a couple of failures in mysql backend unit tests.
Richard Jones <richard@users.sourceforge.net>
parents: 1836
diff changeset
177 self.mysql_backend)
2514
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Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
178 self.sql('''CREATE TABLE ids (name VARCHAR(255),
3929
a472391156ae mysql table creation syntax change
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3858
diff changeset
179 num INTEGER) ENGINE=%s'''%self.mysql_backend)
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Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
180 self.sql('create index ids_name_idx on ids(name)')
2073
261c2e6ceb1e *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 2005
diff changeset
181 self.create_version_2_tables()
261c2e6ceb1e *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 2005
diff changeset
182
3458
931dc7ed25c7 handle "schema" being reserved word in MySQL 5+ [SF#1397569]
Richard Jones <richard@users.sourceforge.net>
parents: 3457
diff changeset
183 def load_dbschema(self):
931dc7ed25c7 handle "schema" being reserved word in MySQL 5+ [SF#1397569]
Richard Jones <richard@users.sourceforge.net>
parents: 3457
diff changeset
184 ''' Load the schema definition that the database currently implements
931dc7ed25c7 handle "schema" being reserved word in MySQL 5+ [SF#1397569]
Richard Jones <richard@users.sourceforge.net>
parents: 3457
diff changeset
185 '''
931dc7ed25c7 handle "schema" being reserved word in MySQL 5+ [SF#1397569]
Richard Jones <richard@users.sourceforge.net>
parents: 3457
diff changeset
186 self.cursor.execute('select `schema` from `schema`')
931dc7ed25c7 handle "schema" being reserved word in MySQL 5+ [SF#1397569]
Richard Jones <richard@users.sourceforge.net>
parents: 3457
diff changeset
187 schema = self.cursor.fetchone()
931dc7ed25c7 handle "schema" being reserved word in MySQL 5+ [SF#1397569]
Richard Jones <richard@users.sourceforge.net>
parents: 3457
diff changeset
188 if schema:
931dc7ed25c7 handle "schema" being reserved word in MySQL 5+ [SF#1397569]
Richard Jones <richard@users.sourceforge.net>
parents: 3457
diff changeset
189 self.database_schema = eval(schema[0])
931dc7ed25c7 handle "schema" being reserved word in MySQL 5+ [SF#1397569]
Richard Jones <richard@users.sourceforge.net>
parents: 3457
diff changeset
190 else:
931dc7ed25c7 handle "schema" being reserved word in MySQL 5+ [SF#1397569]
Richard Jones <richard@users.sourceforge.net>
parents: 3457
diff changeset
191 self.database_schema = {}
931dc7ed25c7 handle "schema" being reserved word in MySQL 5+ [SF#1397569]
Richard Jones <richard@users.sourceforge.net>
parents: 3457
diff changeset
192
3603
f7399e2aa610 escape *all* uses of "schema" in mysql backend [SF#1472120]
Richard Jones <richard@users.sourceforge.net>
parents: 3585
diff changeset
193 def save_dbschema(self):
f7399e2aa610 escape *all* uses of "schema" in mysql backend [SF#1472120]
Richard Jones <richard@users.sourceforge.net>
parents: 3585
diff changeset
194 ''' Save the schema definition that the database currently implements
f7399e2aa610 escape *all* uses of "schema" in mysql backend [SF#1472120]
Richard Jones <richard@users.sourceforge.net>
parents: 3585
diff changeset
195 '''
f7399e2aa610 escape *all* uses of "schema" in mysql backend [SF#1472120]
Richard Jones <richard@users.sourceforge.net>
parents: 3585
diff changeset
196 s = repr(self.database_schema)
f7399e2aa610 escape *all* uses of "schema" in mysql backend [SF#1472120]
Richard Jones <richard@users.sourceforge.net>
parents: 3585
diff changeset
197 self.sql('delete from `schema`')
f7399e2aa610 escape *all* uses of "schema" in mysql backend [SF#1472120]
Richard Jones <richard@users.sourceforge.net>
parents: 3585
diff changeset
198 self.sql('insert into `schema` values (%s)', (s,))
f7399e2aa610 escape *all* uses of "schema" in mysql backend [SF#1472120]
Richard Jones <richard@users.sourceforge.net>
parents: 3585
diff changeset
199
2073
261c2e6ceb1e *** empty log message ***
Richard Jones <richard@users.sourceforge.net>
parents: 2005
diff changeset
200 def create_version_2_tables(self):
2093
3f6024ab2c7a That's the last of the RDBMS migration steps done! Yay!
Richard Jones <richard@users.sourceforge.net>
parents: 2089
diff changeset
201 # OTK store
2514
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Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
202 self.sql('''CREATE TABLE otks (otk_key VARCHAR(255),
2721
1cd01cf106e1 extend OTK and session table value cols to TEXT [SF#1031271]
Richard Jones <richard@users.sourceforge.net>
parents: 2720
diff changeset
203 otk_value TEXT, otk_time FLOAT(20))
3929
a472391156ae mysql table creation syntax change
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3858
diff changeset
204 ENGINE=%s'''%self.mysql_backend)
2514
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
205 self.sql('CREATE INDEX otks_key_idx ON otks(otk_key)')
2093
3f6024ab2c7a That's the last of the RDBMS migration steps done! Yay!
Richard Jones <richard@users.sourceforge.net>
parents: 2089
diff changeset
206
3f6024ab2c7a That's the last of the RDBMS migration steps done! Yay!
Richard Jones <richard@users.sourceforge.net>
parents: 2089
diff changeset
207 # Sessions store
2727
93e2e5b55a3c new Interval props weren't created properly in rdbms
Richard Jones <richard@users.sourceforge.net>
parents: 2721
diff changeset
208 self.sql('''CREATE TABLE sessions (session_key VARCHAR(255),
93e2e5b55a3c new Interval props weren't created properly in rdbms
Richard Jones <richard@users.sourceforge.net>
parents: 2721
diff changeset
209 session_time FLOAT(20), session_value TEXT)
3929
a472391156ae mysql table creation syntax change
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3858
diff changeset
210 ENGINE=%s'''%self.mysql_backend)
2514
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
211 self.sql('''CREATE INDEX sessions_key_idx ON
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
212 sessions(session_key)''')
1839
06f5b36b201b Fix a couple of failures in mysql backend unit tests.
Richard Jones <richard@users.sourceforge.net>
parents: 1836
diff changeset
213
2093
3f6024ab2c7a That's the last of the RDBMS migration steps done! Yay!
Richard Jones <richard@users.sourceforge.net>
parents: 2089
diff changeset
214 # full-text indexing store
2514
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
215 self.sql('''CREATE TABLE __textids (_class VARCHAR(255),
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
216 _itemid VARCHAR(255), _prop VARCHAR(255), _textid INT)
3929
a472391156ae mysql table creation syntax change
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3858
diff changeset
217 ENGINE=%s'''%self.mysql_backend)
2514
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
218 self.sql('''CREATE TABLE __words (_word VARCHAR(30),
3929
a472391156ae mysql table creation syntax change
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3858
diff changeset
219 _textid INT) ENGINE=%s'''%self.mysql_backend)
2514
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Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
220 self.sql('CREATE INDEX words_word_ids ON __words(_word)')
3858
bb30bbfc7cdd Indexing fixes.
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3687
diff changeset
221 self.sql('CREATE INDEX words_by_id ON __words (_textid)')
bb30bbfc7cdd Indexing fixes.
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3687
diff changeset
222 self.sql('CREATE UNIQUE INDEX __textids_by_props ON '
bb30bbfc7cdd Indexing fixes.
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3687
diff changeset
223 '__textids (_class, _itemid, _prop)')
2093
3f6024ab2c7a That's the last of the RDBMS migration steps done! Yay!
Richard Jones <richard@users.sourceforge.net>
parents: 2089
diff changeset
224 sql = 'insert into ids (name, num) values (%s,%s)'%(self.arg, self.arg)
2514
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Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
225 self.sql(sql, ('__textids', 1))
2093
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Richard Jones <richard@users.sourceforge.net>
parents: 2089
diff changeset
226
2217
98d3bf8ffb19 store Intervals as two columns (and other fixes
Richard Jones <richard@users.sourceforge.net>
parents: 2166
diff changeset
227 def add_new_columns_v2(self):
2100
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
228 '''While we're adding the actor column, we need to update the
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
229 tables to have the correct datatypes.'''
2100
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
230 for klass in self.classes.values():
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
231 cn = klass.classname
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
232 properties = klass.getprops()
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
233 old_spec = self.database_schema['tables'][cn]
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
234
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
235 # figure the non-Multilink properties to copy over
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
236 propnames = ['activity', 'creation', 'creator']
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
237
2100
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
238 # figure actions based on data type
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
239 for name, s_prop in old_spec[1]:
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
240 # s_prop is a repr() string of a hyperdb type object
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
241 if s_prop.find('Multilink') == -1:
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
242 if properties.has_key(name):
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
243 propnames.append(name)
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
244 continue
2100
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
245 tn = '%s_%s'%(cn, name)
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
246
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
247 if properties.has_key(name):
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
248 # grabe the current values
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
249 sql = 'select linkid, nodeid from %s'%tn
2514
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
250 self.sql(sql)
2100
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
251 rows = self.cursor.fetchall()
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
252
2100
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
253 # drop the old table
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
254 self.drop_multilink_table_indexes(cn, name)
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
255 sql = 'drop table %s'%tn
2514
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
256 self.sql(sql)
2100
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
257
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
258 if properties.has_key(name):
62ed6505cbec MySQL migration of old backend database to new, typed database complete.
Richard Jones <richard@users.sourceforge.net>
parents: 2099
diff changeset
259 # re-create and populate the new table
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260 self.create_multilink_table(klass, name)
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261 sql = '''insert into %s (linkid, nodeid) values
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262 (%s, %s)'''%(tn, self.arg, self.arg)
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263 for linkid, nodeid in rows:
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264 self.sql(sql, (int(linkid), int(nodeid)))
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265
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diff changeset
266 # figure the column names to fetch
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267 fetch = ['_%s'%name for name in propnames]
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268
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269 # select the data out of the old table
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270 fetch.append('id')
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271 fetch.append('__retired__')
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272 fetchcols = ','.join(fetch)
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273 sql = 'select %s from _%s'%(fetchcols, cn)
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274 self.sql(sql)
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275
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diff changeset
276 # unserialise the old data
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277 olddata = []
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278 propnames = propnames + ['id', '__retired__']
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279 cols = []
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280 first = 1
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281 for entry in self.cursor.fetchall():
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282 l = []
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283 olddata.append(l)
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284 for i in range(len(propnames)):
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285 name = propnames[i]
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286 v = entry[i]
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287
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288 if name in ('id', '__retired__'):
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289 if first:
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290 cols.append(name)
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291 l.append(int(v))
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292 continue
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293 if first:
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294 cols.append('_' + name)
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295 prop = properties[name]
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296 if isinstance(prop, Date) and v is not None:
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297 v = date.Date(v)
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298 elif isinstance(prop, Interval) and v is not None:
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299 v = date.Interval(v)
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300 elif isinstance(prop, Password) and v is not None:
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301 v = password.Password(encrypted=v)
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302 elif (isinstance(prop, Boolean) or
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303 isinstance(prop, Number)) and v is not None:
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304 v = float(v)
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305
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306 # convert to new MySQL data type
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307 prop = properties[name]
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308 if v is not None:
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309 e = self.to_sql_value(prop.__class__)(v)
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310 else:
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311 e = None
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diff changeset
312 l.append(e)
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313
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314 # Intervals store the seconds value too
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315 if isinstance(prop, Interval):
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316 if first:
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317 cols.append('__' + name + '_int__')
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318 if v is not None:
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319 l.append(v.as_seconds())
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320 else:
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diff changeset
321 l.append(e)
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322 first = 0
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323
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324 self.drop_class_table_indexes(cn, old_spec[0])
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325
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326 # drop the old table
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327 self.sql('drop table _%s'%cn)
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328
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329 # create the new table
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330 self.create_class_table(klass)
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diff changeset
331
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diff changeset
332 # do the insert of the old data
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diff changeset
333 args = ','.join([self.arg for x in cols])
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334 cols = ','.join(cols)
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diff changeset
335 sql = 'insert into _%s (%s) values (%s)'%(cn, cols, args)
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diff changeset
336 for entry in olddata:
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diff changeset
337 self.sql(sql, tuple(entry))
2100
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diff changeset
338
2244
ac4f295499a4 fixed journal marshalling in RDBMS backends [SF#943627]
Richard Jones <richard@users.sourceforge.net>
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diff changeset
339 # now load up the old journal data to migrate it
2100
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diff changeset
340 cols = ','.join('nodeid date tag action params'.split())
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diff changeset
341 sql = 'select %s from %s__journal'%(cols, cn)
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diff changeset
342 self.sql(sql)
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diff changeset
343
2244
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diff changeset
344 # data conversions
2100
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diff changeset
345 olddata = []
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diff changeset
346 for nodeid, journaldate, journaltag, action, params in \
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diff changeset
347 self.cursor.fetchall():
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diff changeset
348 #nodeid = int(nodeid)
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diff changeset
349 journaldate = date.Date(journaldate)
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diff changeset
350 #params = eval(params)
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diff changeset
351 olddata.append((nodeid, journaldate, journaltag, action,
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diff changeset
352 params))
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diff changeset
353
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diff changeset
354 # drop journal table and indexes
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diff changeset
355 self.drop_journal_table_indexes(cn)
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diff changeset
356 sql = 'drop table %s__journal'%cn
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diff changeset
357 self.sql(sql)
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diff changeset
358
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diff changeset
359 # re-create journal table
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diff changeset
360 self.create_journal_table(klass)
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Stefan Seefeld <stefan@seefeld.name>
parents: 4059
diff changeset
361 dc = self.to_sql_value(hyperdb.Date)
2100
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diff changeset
362 for nodeid, journaldate, journaltag, action, params in olddata:
3140
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diff changeset
363 self.save_journal(cn, cols, nodeid, dc(journaldate),
2100
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diff changeset
364 journaltag, action, params)
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diff changeset
365
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diff changeset
366 # make sure the normal schema update code doesn't try to
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Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2634
diff changeset
367 # change things
2100
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diff changeset
368 self.database_schema['tables'][cn] = klass.schema()
2077
3e0961d6d44d Added the "actor" property.
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diff changeset
369
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Richard Jones <richard@users.sourceforge.net>
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diff changeset
370 def fix_version_2_tables(self):
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diff changeset
371 # Convert journal date column to TIMESTAMP, params column to TEXT
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Richard Jones <richard@users.sourceforge.net>
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diff changeset
372 self._convert_journal_tables()
7d0bb6601809 fix some column datatypes in postgresql and mysql
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diff changeset
373
7d0bb6601809 fix some column datatypes in postgresql and mysql
Richard Jones <richard@users.sourceforge.net>
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diff changeset
374 # Convert all String properties to TEXT
7d0bb6601809 fix some column datatypes in postgresql and mysql
Richard Jones <richard@users.sourceforge.net>
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diff changeset
375 self._convert_string_properties()
7d0bb6601809 fix some column datatypes in postgresql and mysql
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diff changeset
376
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faf93d3fbf2f added mysql backend
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parents:
diff changeset
377 def __repr__(self):
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
378 return '<myroundsql 0x%x>'%id(self)
faf93d3fbf2f added mysql backend
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parents:
diff changeset
379
faf93d3fbf2f added mysql backend
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parents:
diff changeset
380 def sql_fetchone(self):
faf93d3fbf2f added mysql backend
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parents:
diff changeset
381 return self.cursor.fetchone()
faf93d3fbf2f added mysql backend
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parents:
diff changeset
382
faf93d3fbf2f added mysql backend
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parents:
diff changeset
383 def sql_fetchall(self):
faf93d3fbf2f added mysql backend
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parents:
diff changeset
384 return self.cursor.fetchall()
1906
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
385
f255363e6d97 PostgreSQL backend lands.
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diff changeset
386 def sql_index_exists(self, table_name, index_name):
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091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
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diff changeset
387 self.sql('show index from %s'%table_name)
1906
f255363e6d97 PostgreSQL backend lands.
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diff changeset
388 for index in self.cursor.fetchall():
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
389 if index[2] == index_name:
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
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diff changeset
390 return 1
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
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diff changeset
391 return 0
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Richard Jones <richard@users.sourceforge.net>
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diff changeset
392
2424
74474ec41050 argh! backwards compat
Richard Jones <richard@users.sourceforge.net>
parents: 2413
diff changeset
393 def create_class_table(self, spec, create_sequence=1):
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faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
394 cols, mls = self.determine_columns(spec.properties.items())
2098
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diff changeset
395
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
396 # add on our special columns
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parents: 2093
diff changeset
397 cols.append(('id', 'INTEGER PRIMARY KEY'))
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parents: 2093
diff changeset
398 cols.append(('__retired__', 'INTEGER DEFAULT 0'))
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parents: 2093
diff changeset
399
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2093
diff changeset
400 # create the base table
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
401 scols = ','.join(['%s %s'%x for x in cols])
3934
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parents: 3929
diff changeset
402 sql = 'create table _%s (%s) ENGINE=%s'%(spec.classname, scols,
1839
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Richard Jones <richard@users.sourceforge.net>
parents: 1836
diff changeset
403 self.mysql_backend)
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parents: 2508
diff changeset
404 self.sql(sql)
2098
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parents: 2093
diff changeset
405
1906
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parents: 1873
diff changeset
406 self.create_class_table_indexes(spec)
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parents:
diff changeset
407 return cols, mls
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Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
408
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diff changeset
409 def create_class_table_indexes(self, spec):
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parents: 3455
diff changeset
410 ''' create the class table for the given spec
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parents: 3455
diff changeset
411 '''
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parents: 3455
diff changeset
412 # create __retired__ index
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parents: 3455
diff changeset
413 index_sql2 = 'create index _%s_retired_idx on _%s(__retired__)'%(
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parents: 3455
diff changeset
414 spec.classname, spec.classname)
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parents: 3455
diff changeset
415 self.sql(index_sql2)
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parents: 3455
diff changeset
416
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parents: 3455
diff changeset
417 # create index for key property
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parents: 3455
diff changeset
418 if spec.key:
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parents: 3455
diff changeset
419 if isinstance(spec.properties[spec.key], String):
88f0a5030404 Fix invalid date spec in db tests
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parents: 3455
diff changeset
420 idx = spec.key + '(255)'
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parents: 3455
diff changeset
421 else:
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parents: 3455
diff changeset
422 idx = spec.key
88f0a5030404 Fix invalid date spec in db tests
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parents: 3455
diff changeset
423 index_sql3 = 'create index _%s_%s_idx on _%s(_%s)'%(
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Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
424 spec.classname, spec.key,
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
425 spec.classname, idx)
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
426 self.sql(index_sql3)
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
427
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
428 # TODO: create indexes on (selected?) Link property columns, as
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
429 # they're more likely to be used for lookup
88f0a5030404 Fix invalid date spec in db tests
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parents: 3455
diff changeset
430
3969
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Richard Jones <richard@users.sourceforge.net>
parents: 3934
diff changeset
431 def add_class_key_required_unique_constraint(self, cn, key):
905faf52a51f fix mysql breakage in 1.4.2
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parents: 3934
diff changeset
432 # mysql requires sizes on TEXT indexes
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parents: 3934
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433 prop = self.classes[cn].getprops()[key]
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parents: 3934
diff changeset
434 if isinstance(prop, String):
905faf52a51f fix mysql breakage in 1.4.2
Richard Jones <richard@users.sourceforge.net>
parents: 3934
diff changeset
435 sql = '''create unique index _%s_key_retired_idx
905faf52a51f fix mysql breakage in 1.4.2
Richard Jones <richard@users.sourceforge.net>
parents: 3934
diff changeset
436 on _%s(__retired__, _%s(255))'''%(cn, cn, key)
905faf52a51f fix mysql breakage in 1.4.2
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parents: 3934
diff changeset
437 else:
905faf52a51f fix mysql breakage in 1.4.2
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parents: 3934
diff changeset
438 sql = '''create unique index _%s_key_retired_idx
905faf52a51f fix mysql breakage in 1.4.2
Richard Jones <richard@users.sourceforge.net>
parents: 3934
diff changeset
439 on _%s(__retired__, _%s)'''%(cn, cn, key)
905faf52a51f fix mysql breakage in 1.4.2
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parents: 3934
diff changeset
440 self.sql(sql)
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parents: 3934
diff changeset
441
3457
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diff changeset
442 def create_class_table_key_index(self, cn, key):
3969
905faf52a51f fix mysql breakage in 1.4.2
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parents: 3934
diff changeset
443 # mysql requires sizes on TEXT indexes
3457
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diff changeset
444 prop = self.classes[cn].getprops()[key]
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parents: 3455
diff changeset
445 if isinstance(prop, String):
88f0a5030404 Fix invalid date spec in db tests
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parents: 3455
diff changeset
446 sql = 'create index _%s_%s_idx on _%s(_%s(255))'%(cn, key, cn, key)
88f0a5030404 Fix invalid date spec in db tests
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parents: 3455
diff changeset
447 else:
88f0a5030404 Fix invalid date spec in db tests
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parents: 3455
diff changeset
448 sql = 'create index _%s_%s_idx on _%s(_%s)'%(cn, key, cn, key)
88f0a5030404 Fix invalid date spec in db tests
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parents: 3455
diff changeset
449 self.sql(sql)
88f0a5030404 Fix invalid date spec in db tests
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parents: 3455
diff changeset
450
1906
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parents: 1873
diff changeset
451 def drop_class_table_indexes(self, cn, key):
f255363e6d97 PostgreSQL backend lands.
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parents: 1873
diff changeset
452 # drop the old table indexes first
f255363e6d97 PostgreSQL backend lands.
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parents: 1873
diff changeset
453 l = ['_%s_id_idx'%cn, '_%s_retired_idx'%cn]
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
454 if key:
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
455 l.append('_%s_%s_idx'%(cn, key))
f255363e6d97 PostgreSQL backend lands.
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parents: 1873
diff changeset
456
f255363e6d97 PostgreSQL backend lands.
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parents: 1873
diff changeset
457 table_name = '_%s'%cn
f255363e6d97 PostgreSQL backend lands.
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parents: 1873
diff changeset
458 for index_name in l:
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parents: 1873
diff changeset
459 if not self.sql_index_exists(table_name, index_name):
f255363e6d97 PostgreSQL backend lands.
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parents: 1873
diff changeset
460 continue
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diff changeset
461 index_sql = 'drop index %s on %s'%(index_name, table_name)
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diff changeset
462 self.sql(index_sql)
1906
f255363e6d97 PostgreSQL backend lands.
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diff changeset
463
1375
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
464 def create_journal_table(self, spec):
2679
b3f0b7b9d20d for MySQL connection, password argument is called 'passwd'.
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2634
diff changeset
465 ''' create the journal table for a class given the spec and
2413
7d0bb6601809 fix some column datatypes in postgresql and mysql
Richard Jones <richard@users.sourceforge.net>
parents: 2379
diff changeset
466 already-determined cols
7d0bb6601809 fix some column datatypes in postgresql and mysql
Richard Jones <richard@users.sourceforge.net>
parents: 2379
diff changeset
467 '''
2098
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diff changeset
468 # journal table
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2093
diff changeset
469 cols = ','.join(['%s varchar'%x
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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parents: 2093
diff changeset
470 for x in 'nodeid date tag action params'.split()])
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parents: 2093
diff changeset
471 sql = '''create table %s__journal (
2413
7d0bb6601809 fix some column datatypes in postgresql and mysql
Richard Jones <richard@users.sourceforge.net>
parents: 2379
diff changeset
472 nodeid integer, date datetime, tag varchar(255),
3934
8c75e8fce5dc Fix a couple more old instances of "type" instead of "ENGINE" for mysql backend.
Richard Jones <richard@users.sourceforge.net>
parents: 3929
diff changeset
473 action varchar(255), params text) ENGINE=%s'''%(
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
474 spec.classname, self.mysql_backend)
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diff changeset
475 self.sql(sql)
1906
f255363e6d97 PostgreSQL backend lands.
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parents: 1873
diff changeset
476 self.create_journal_table_indexes(spec)
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
477
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
478 def drop_journal_table_indexes(self, classname):
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
479 index_name = '%s_journ_idx'%classname
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
480 if not self.sql_index_exists('%s__journal'%classname, index_name):
f255363e6d97 PostgreSQL backend lands.
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parents: 1873
diff changeset
481 return
f255363e6d97 PostgreSQL backend lands.
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parents: 1873
diff changeset
482 index_sql = 'drop index %s on %s__journal'%(index_name, classname)
2514
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diff changeset
483 self.sql(index_sql)
1375
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
484
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
485 def create_multilink_table(self, spec, ml):
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
486 sql = '''CREATE TABLE `%s_%s` (linkid VARCHAR(255),
3929
a472391156ae mysql table creation syntax change
Justus Pendleton <jpend@users.sourceforge.net>
parents: 3858
diff changeset
487 nodeid VARCHAR(255)) ENGINE=%s'''%(spec.classname, ml,
1839
06f5b36b201b Fix a couple of failures in mysql backend unit tests.
Richard Jones <richard@users.sourceforge.net>
parents: 1836
diff changeset
488 self.mysql_backend)
2514
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diff changeset
489 self.sql(sql)
1906
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
490 self.create_multilink_table_indexes(spec, ml)
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
491
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
492 def drop_multilink_table_indexes(self, classname, ml):
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Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
493 l = [
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
494 '%s_%s_l_idx'%(classname, ml),
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
495 '%s_%s_n_idx'%(classname, ml)
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
496 ]
2089
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Richard Jones <richard@users.sourceforge.net>
parents: 2082
diff changeset
497 table_name = '%s_%s'%(classname, ml)
1906
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
498 for index_name in l:
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
499 if not self.sql_index_exists(table_name, index_name):
f255363e6d97 PostgreSQL backend lands.
Richard Jones <richard@users.sourceforge.net>
parents: 1873
diff changeset
500 continue
2514
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parents: 2508
diff changeset
501 sql = 'drop index %s on %s'%(index_name, table_name)
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
502 self.sql(sql)
1375
faf93d3fbf2f added mysql backend
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
503
2077
3e0961d6d44d Added the "actor" property.
Richard Jones <richard@users.sourceforge.net>
parents: 2075
diff changeset
504 def drop_class_table_key_index(self, cn, key):
3e0961d6d44d Added the "actor" property.
Richard Jones <richard@users.sourceforge.net>
parents: 2075
diff changeset
505 table_name = '_%s'%cn
3e0961d6d44d Added the "actor" property.
Richard Jones <richard@users.sourceforge.net>
parents: 2075
diff changeset
506 index_name = '_%s_%s_idx'%(cn, key)
3e0961d6d44d Added the "actor" property.
Richard Jones <richard@users.sourceforge.net>
parents: 2075
diff changeset
507 if not self.sql_index_exists(table_name, index_name):
3e0961d6d44d Added the "actor" property.
Richard Jones <richard@users.sourceforge.net>
parents: 2075
diff changeset
508 return
3e0961d6d44d Added the "actor" property.
Richard Jones <richard@users.sourceforge.net>
parents: 2075
diff changeset
509 sql = 'drop index %s on %s'%(index_name, table_name)
2514
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
510 self.sql(sql)
2077
3e0961d6d44d Added the "actor" property.
Richard Jones <richard@users.sourceforge.net>
parents: 2075
diff changeset
511
2098
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Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
512 # old-skool id generation
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
513 def newid(self, classname):
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
514 ''' Generate a new id for the given class
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
515 '''
2717
ca2ee58c8310 use row locking in MySQL newid() [SF#1034211]
Richard Jones <richard@users.sourceforge.net>
parents: 2693
diff changeset
516 # get the next ID - "FOR UPDATE" will lock the row for us
ca2ee58c8310 use row locking in MySQL newid() [SF#1034211]
Richard Jones <richard@users.sourceforge.net>
parents: 2693
diff changeset
517 sql = 'select num from ids where name=%s FOR UPDATE'%self.arg
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Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
518 self.sql(sql, (classname, ))
2098
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parents: 2093
diff changeset
519 newid = int(self.cursor.fetchone()[0])
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
520
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
521 # update the counter
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
522 sql = 'update ids set num=%s where name=%s'%(self.arg, self.arg)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
523 vals = (int(newid)+1, classname)
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Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
524 self.sql(sql, vals)
2098
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parents: 2093
diff changeset
525
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
526 # return as string
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
527 return str(newid)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
528
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
529 def setid(self, classname, setid):
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
530 ''' 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: 2093
diff changeset
531
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
532 We add one to make it behave like the seqeunces in postgres.
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
533 '''
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
534 sql = 'update ids set num=%s where name=%s'%(self.arg, self.arg)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
535 vals = (int(setid)+1, classname)
2514
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
536 self.sql(sql, vals)
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
537
3310
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3216
diff changeset
538 def clear(self):
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3216
diff changeset
539 rdbms_common.Database.clear(self)
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3216
diff changeset
540
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3216
diff changeset
541 # set the id counters to 0 (setid adds one) so we start at 1
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3216
diff changeset
542 for cn in self.classes.keys():
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3216
diff changeset
543 self.setid(cn, 0)
3518d1ffd940 merge from maint-0-7
Richard Jones <richard@users.sourceforge.net>
parents: 3216
diff changeset
544
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
545 def create_class(self, spec):
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
546 rdbms_common.Database.create_class(self, spec)
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
547 sql = 'insert into ids (name, num) values (%s, %s)'
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
548 vals = (spec.classname, 1)
2514
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
549 self.sql(sql, vals)
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
Richard Jones <richard@users.sourceforge.net>
parents: 2093
diff changeset
550
3687
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
Richard Jones <richard@users.sourceforge.net>
parents: 3635
diff changeset
551 def sql_commit(self, fail_ok=False):
2456
1cd69db95b23 fixed some more mysql 0.6->0.7 upgrade bugs [SF#950410]
Richard Jones <richard@users.sourceforge.net>
parents: 2431
diff changeset
552 ''' Actually commit to the database.
1cd69db95b23 fixed some more mysql 0.6->0.7 upgrade bugs [SF#950410]
Richard Jones <richard@users.sourceforge.net>
parents: 2431
diff changeset
553 '''
4059
ef0b4396888a Enhance and simplify logging.
Stefan Seefeld <stefan@seefeld.name>
parents: 3969
diff changeset
554 self.log_info('commit')
3687
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
Richard Jones <richard@users.sourceforge.net>
parents: 3635
diff changeset
555
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
Richard Jones <richard@users.sourceforge.net>
parents: 3635
diff changeset
556 # MySQL commits don't seem to ever fail, the latest update winning.
ff9f4ca42454 Postgres backend allows transaction collisions to be ignored when...
Richard Jones <richard@users.sourceforge.net>
parents: 3635
diff changeset
557 # makes you wonder why they have transactions...
2456
1cd69db95b23 fixed some more mysql 0.6->0.7 upgrade bugs [SF#950410]
Richard Jones <richard@users.sourceforge.net>
parents: 2431
diff changeset
558 self.conn.commit()
1cd69db95b23 fixed some more mysql 0.6->0.7 upgrade bugs [SF#950410]
Richard Jones <richard@users.sourceforge.net>
parents: 2431
diff changeset
559
1cd69db95b23 fixed some more mysql 0.6->0.7 upgrade bugs [SF#950410]
Richard Jones <richard@users.sourceforge.net>
parents: 2431
diff changeset
560 # open a new cursor for subsequent work
1cd69db95b23 fixed some more mysql 0.6->0.7 upgrade bugs [SF#950410]
Richard Jones <richard@users.sourceforge.net>
parents: 2431
diff changeset
561 self.cursor = self.conn.cursor()
1cd69db95b23 fixed some more mysql 0.6->0.7 upgrade bugs [SF#950410]
Richard Jones <richard@users.sourceforge.net>
parents: 2431
diff changeset
562
1cd69db95b23 fixed some more mysql 0.6->0.7 upgrade bugs [SF#950410]
Richard Jones <richard@users.sourceforge.net>
parents: 2431
diff changeset
563 # make sure we're in a new transaction and not autocommitting
3216
27aba1d8fccc merge from maint-0-8
Richard Jones <richard@users.sourceforge.net>
parents: 3155
diff changeset
564 self.sql("SET AUTOCOMMIT=0")
2514
091711fb2f8c Initial logging integration: replace all debug prints with logging calls...
Richard Jones <richard@users.sourceforge.net>
parents: 2508
diff changeset
565 self.sql("START TRANSACTION")
2456
1cd69db95b23 fixed some more mysql 0.6->0.7 upgrade bugs [SF#950410]
Richard Jones <richard@users.sourceforge.net>
parents: 2431
diff changeset
566
3457
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
567 def sql_close(self):
4059
ef0b4396888a Enhance and simplify logging.
Stefan Seefeld <stefan@seefeld.name>
parents: 3969
diff changeset
568 self.log_info('close')
3457
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
569 try:
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
570 self.conn.close()
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
571 except MySQLdb.ProgrammingError, message:
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
572 if str(message) != 'closing a closed connection':
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
573 raise
88f0a5030404 Fix invalid date spec in db tests
Richard Jones <richard@users.sourceforge.net>
parents: 3455
diff changeset
574
1415
6883852e9b15 mysql backend passes all tests (at last!)
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1375
diff changeset
575 class MysqlClass:
4466
f1fe6fd0aa61 Multilinks can be filtered by combining elements with AND, OR and NOT now.
Bernhard Reiter <Bernhard.Reiter@intevation.de>
parents: 4285
diff changeset
576
f1fe6fd0aa61 Multilinks can be filtered by combining elements with AND, OR and NOT now.
Bernhard Reiter <Bernhard.Reiter@intevation.de>
parents: 4285
diff changeset
577 def supports_subselects(self):
f1fe6fd0aa61 Multilinks can be filtered by combining elements with AND, OR and NOT now.
Bernhard Reiter <Bernhard.Reiter@intevation.de>
parents: 4285
diff changeset
578 # TODO: AFAIK its version dependent for MySQL
f1fe6fd0aa61 Multilinks can be filtered by combining elements with AND, OR and NOT now.
Bernhard Reiter <Bernhard.Reiter@intevation.de>
parents: 4285
diff changeset
579 return False
f1fe6fd0aa61 Multilinks can be filtered by combining elements with AND, OR and NOT now.
Bernhard Reiter <Bernhard.Reiter@intevation.de>
parents: 4285
diff changeset
580
3635
53987aa153d2 Transitive-property support.
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3633
diff changeset
581 def _subselect(self, classname, multilink_table):
3633
a292054b4393 The whole filter method was replicated in back_mysql.py from rdbms_common.py
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3603
diff changeset
582 ''' "I can't believe it's not a toy RDBMS"
a292054b4393 The whole filter method was replicated in back_mysql.py from rdbms_common.py
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3603
diff changeset
583 see, even toy RDBMSes like gadfly and sqlite can do sub-selects...
1415
6883852e9b15 mysql backend passes all tests (at last!)
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1375
diff changeset
584 '''
3635
53987aa153d2 Transitive-property support.
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3633
diff changeset
585 self.db.sql('select nodeid from %s'%multilink_table)
3633
a292054b4393 The whole filter method was replicated in back_mysql.py from rdbms_common.py
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3603
diff changeset
586 s = ','.join([x[0] for x in self.db.sql_fetchall()])
3635
53987aa153d2 Transitive-property support.
Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net>
parents: 3633
diff changeset
587 return '_%s.id not in (%s)'%(classname, s)
1415
6883852e9b15 mysql backend passes all tests (at last!)
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1375
diff changeset
588
4285
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
589 def create_inner(self, **propvalues):
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
590 try:
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
591 return rdbms_common.Class.create_inner(self, **propvalues)
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
592 except MySQLdb.IntegrityError, e:
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
593 self._handle_integrity_error(e, propvalues)
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
594
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
595 def set_inner(self, nodeid, **propvalues):
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
596 try:
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
597 return rdbms_common.Class.set_inner(self, nodeid,
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
598 **propvalues)
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
599 except MySQLdb.IntegrityError, e:
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
600 self._handle_integrity_error(e, propvalues)
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
601
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
602 def _handle_integrity_error(self, e, propvalues):
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
603 ''' Handle a MySQL IntegrityError.
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
604
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
605 If the error is recognized, then it may be converted into an
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
606 alternative exception. Otherwise, it is raised unchanged from
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
607 this function.'''
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
608
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
609 # There are checks in create_inner/set_inner to see if a node
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
610 # is being created with the same key as an existing node.
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
611 # But, there is a race condition -- we may pass those checks,
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
612 # only to find out that a parallel session has created the
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
613 # node by by the time we actually issue the SQL command to
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
614 # create the node. Fortunately, MySQL gives us a unique error
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
615 # code for this situation, so we can detect it here and handle
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
616 # it appropriately.
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
617 #
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
618 # The details of the race condition are as follows, where
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
619 # "X" is a classname, and the term "thread" is meant to
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
620 # refer generically to both threads and processes:
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
621 #
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
622 # Thread A Thread B
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
623 # -------- --------
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
624 # read table for X
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
625 # create new X object
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
626 # commit
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
627 # create new X object
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
628 #
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
629 # In Thread B, the check in create_inner does not notice that
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
630 # the new X object is a duplicate of that committed in Thread
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
631 # A because MySQL's default "consistent nonlocking read"
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
632 # behavior means that Thread B sees a snapshot of the database
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
633 # at the point at which its transaction began -- which was
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
634 # before Thread A created the object. However, the attempt
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
635 # to *write* to the table for X, creating a duplicate entry,
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
636 # triggers an error at the point of the write.
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
637 #
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
638 # If both A and B's transaction begins with creating a new X
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
639 # object, then this bug cannot occur because creating the
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
640 # object requires getting a new ID, and newid() locks the id
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
641 # table until the transaction is committed or rolledback. So,
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
642 # B will block until A's commit is complete, and will not
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
643 # actually get its snapshot until A's transaction completes.
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
644 # But, if the transaction has begun prior to calling newid,
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
645 # then the snapshot has already been established.
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
646 if e[0] == ER.DUP_ENTRY:
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
647 key = propvalues[self.key]
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
648 raise ValueError, 'node with key "%s" exists' % key
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
649 # We don't know what this exception is; reraise it.
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
650 raise
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
651
783053bd466c Fix race condition.
Stefan Seefeld <stefan@seefeld.name>
parents: 4085
diff changeset
652
1415
6883852e9b15 mysql backend passes all tests (at last!)
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1375
diff changeset
653 class Class(MysqlClass, rdbms_common.Class):
6883852e9b15 mysql backend passes all tests (at last!)
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1375
diff changeset
654 pass
6883852e9b15 mysql backend passes all tests (at last!)
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1375
diff changeset
655 class IssueClass(MysqlClass, rdbms_common.IssueClass):
6883852e9b15 mysql backend passes all tests (at last!)
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1375
diff changeset
656 pass
6883852e9b15 mysql backend passes all tests (at last!)
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1375
diff changeset
657 class FileClass(MysqlClass, rdbms_common.FileClass):
6883852e9b15 mysql backend passes all tests (at last!)
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1375
diff changeset
658 pass
6883852e9b15 mysql backend passes all tests (at last!)
Andrey Lebedev <kedder@users.sourceforge.net>
parents: 1375
diff changeset
659
2679
b3f0b7b9d20d for MySQL connection, password argument is called 'passwd'.
Alexander Smishlajev <a1s@users.sourceforge.net>
parents: 2634
diff changeset
660 # vim: set et sts=4 sw=4 :
Roundup Issue Tracker: http://roundup-tracker.org/