from trac.db import Table,Column,Index,DatabaseManager
def do_upgrade(env, ver, cursor):
"""Rename the columns `kind` and `change` in the `node_change` table for
compatibity with MySQL.
"""
cursor.execute("CREATE TEMPORARY TABLE nc_old AS SELECT * FROM node_change")
cursor.execute("DROP TABLE node_change")
table = Table('node_change', key=('rev', 'path', 'change_type'))[
Column('rev'),
Column('path'),
Column('node_type', size=1),
Column('change_type', size=1),
Column('base_path'),
Column('base_rev'),
Index(['rev'])
]
db_connector, _ = DatabaseManager(env)._get_connector()
for stmt in db_connector.to_sql(table):
cursor.execute(stmt)
cursor.execute("INSERT INTO node_change (rev,path,node_type,change_type,"
"base_path,base_rev) SELECT rev,path,kind,change,"
"base_path,base_rev FROM nc_old")
cursor.execute("DROP TABLE nc_old")
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