/usr/lib/python3/dist-packages/gnocchi/indexer/alembic/versions/5c4f93e5bb4_mysql_float_to_timestamp.py is in python3-gnocchi 4.2.0-0ubuntu5.
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#
# Copyright 2016 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.
#
"""mysql_float_to_timestamp
Revision ID: 5c4f93e5bb4
Revises: 7e6f9d542f8b
Create Date: 2016-07-25 15:36:36.469847
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.sql import func
from gnocchi.indexer import sqlalchemy_types
# revision identifiers, used by Alembic.
revision = '5c4f93e5bb4'
down_revision = '27d2a1d205ff'
branch_labels = None
depends_on = None
def upgrade():
bind = op.get_bind()
if bind and bind.engine.name == "mysql":
op.execute("SET time_zone = '+00:00'")
# NOTE(jd) So that crappy engine that is MySQL does not have "ALTER
# TABLE … USING …". We need to copy everything and convert…
for table_name, column_name in (("resource", "started_at"),
("resource", "ended_at"),
("resource", "revision_start"),
("resource_history", "started_at"),
("resource_history", "ended_at"),
("resource_history", "revision_start"),
("resource_history", "revision_end"),
("resource_type", "updated_at")):
nullable = column_name == "ended_at"
existing_type = sa.types.DECIMAL(
precision=20, scale=6, asdecimal=True)
existing_col = sa.Column(
column_name,
existing_type,
nullable=nullable)
temp_col = sa.Column(
column_name + "_ts",
sqlalchemy_types.TimestampUTC(),
nullable=True)
op.add_column(table_name, temp_col)
t = sa.sql.table(table_name, existing_col, temp_col)
op.execute(t.update().values(
**{column_name + "_ts": func.from_unixtime(existing_col)}))
op.drop_column(table_name, column_name)
op.alter_column(table_name,
column_name + "_ts",
nullable=nullable,
type_=sqlalchemy_types.TimestampUTC(),
existing_nullable=nullable,
existing_type=existing_type,
new_column_name=column_name)
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