1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
# Copyright 2014 OpenStack Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
"""add constraint for routerid
Revision ID: 31d7f831a591
Revises: 37f322991f59
Create Date: 2014-02-26 06:47:16.494393
"""
# revision identifiers, used by Alembic.
revision = '31d7f831a591'
down_revision = '37f322991f59'
from alembic import op
import sqlalchemy as sa
from neutron.db import migration
TABLE_NAME = 'routerl3agentbindings'
PK_NAME = 'pk_routerl3agentbindings'
def upgrade():
# In order to sanitize the data during migration,
# the current records in the table need to be verified
# and all the duplicate records which violate the PK
# constraint need to be removed.
context = op.get_context()
if context.bind.dialect.name in ('postgresql', 'ibm_db_sa'):
op.execute('DELETE FROM %(table)s WHERE id in ('
'SELECT %(table)s.id FROM %(table)s LEFT OUTER JOIN '
'(SELECT MIN(id) as id, router_id, l3_agent_id '
' FROM %(table)s GROUP BY router_id, l3_agent_id) AS temp '
'ON %(table)s.id = temp.id WHERE temp.id is NULL);'
% {'table': TABLE_NAME})
else:
op.execute('DELETE %(table)s FROM %(table)s LEFT OUTER JOIN '
'(SELECT MIN(id) as id, router_id, l3_agent_id '
' FROM %(table)s GROUP BY router_id, l3_agent_id) AS temp '
'ON %(table)s.id = temp.id WHERE temp.id is NULL;'
% {'table': TABLE_NAME})
op.drop_column(TABLE_NAME, 'id')
with migration.remove_fks_from_table(TABLE_NAME):
# DB2 doesn't support nullable column in primary key
if context.bind.dialect.name == 'ibm_db_sa':
op.alter_column(
table_name=TABLE_NAME,
column_name='router_id',
nullable=False
)
op.alter_column(
table_name=TABLE_NAME,
column_name='l3_agent_id',
nullable=False
)
op.create_primary_key(
name=PK_NAME,
table_name=TABLE_NAME,
cols=['router_id', 'l3_agent_id']
)
def downgrade():
context = op.get_context()
dialect = context.bind.dialect.name
op.drop_constraint(
name=PK_NAME,
table_name=TABLE_NAME,
type_='primary'
)
op.add_column(
TABLE_NAME,
sa.Column('id', sa.String(32))
)
if dialect == 'ibm_db_sa':
# DB2 doesn't support nullable column in primary key
op.alter_column(
table_name=TABLE_NAME,
column_name='id',
nullable=False
)
with migration.remove_fks_from_table(TABLE_NAME):
op.create_primary_key(
name=PK_NAME,
table_name=TABLE_NAME,
cols=['id']
)
|
