Mercurial > genshi > mirror
view examples/trac/trac/upgrades/db18.py @ 39:93b4dcbafd7b trunk
Copy Trac to main branch.
author | cmlenz |
---|---|
date | Mon, 03 Jul 2006 18:53:27 +0000 |
parents | |
children |
line wrap: on
line source
from trac.db import Table, Column, Index, DatabaseManager def do_upgrade(env, ver, cursor): cursor.execute("CREATE TEMPORARY TABLE session_old AS SELECT * FROM session") cursor.execute("DROP TABLE session") cursor.execute("CREATE TEMPORARY TABLE ticket_change_old AS SELECT * FROM ticket_change") cursor.execute("DROP TABLE ticket_change") # A more normalized session schema where the attributes are stored in # a separate table tables = [Table('session', key=('sid', 'authenticated'))[ Column('sid'), Column('authenticated', type='int'), Column('last_visit', type='int'), Index(['last_visit']), Index(['authenticated'])], Table('session_attribute', key=('sid', 'authenticated', 'name'))[ Column('sid'), Column('authenticated', type='int'), Column('name'), Column('value')], Table('ticket_change', key=('ticket', 'time', 'field'))[ Column('ticket', type='int'), Column('time', type='int'), Column('author'), Column('field'), Column('oldvalue'), Column('newvalue'), Index(['ticket']), Index(['time'])]] db_connector, _ = DatabaseManager(env)._get_connector() for table in tables: for stmt in db_connector.to_sql(table): cursor.execute(stmt) # Add an index to the temporary table to speed up the conversion cursor.execute("CREATE INDEX session_old_sid_idx ON session_old(sid)") # Insert the sessions into the new table db = env.get_db_cnx() cursor.execute("INSERT INTO session (sid, last_visit, authenticated) " "SELECT distinct s.sid,COALESCE(%s,0),s.authenticated " "FROM session_old AS s LEFT JOIN session_old AS s2 " "ON (s.sid=s2.sid AND s2.var_name='last_visit') " "WHERE s.sid IS NOT NULL" % db.cast('s2.var_value', 'int')) cursor.execute("INSERT INTO session_attribute " "(sid, authenticated, name, value) " "SELECT s.sid, s.authenticated, s.var_name, s.var_value " "FROM session_old s " "WHERE s.var_name <> 'last_visit' AND s.sid IS NOT NULL") # Insert ticket change data into the new table cursor.execute("INSERT INTO ticket_change " "(ticket, time, author, field, oldvalue, newvalue) " "SELECT ticket, time, author, field, oldvalue, newvalue " "FROM ticket_change_old") cursor.execute("DROP TABLE session_old") cursor.execute("DROP TABLE ticket_change_old")