Fix sqlalchemy migration script 061 for DB2 backend
DB2 doesn't support alter column type from string to text,
need to add a new column and copy data from old column, and
later remove the old column.
Closes-Bug: #1443252
Change-Id: I7b3edf6bf7ea0efaf96398a83dad9ebe61caaa23
(cherry picked from commit 7b25a9d647
)
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@ -20,7 +20,20 @@ def upgrade(migrate_engine):
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for tab_name in ['stack', 'resource', 'software_deployment']:
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table = sqlalchemy.Table(tab_name, meta, autoload=True)
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table.c.status_reason.alter(type=sqlalchemy.Text)
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if migrate_engine.name == 'ibm_db_sa':
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status_reason = sqlalchemy.Column('new_status_reason',
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sqlalchemy.Text)
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table.create_column(status_reason)
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qry = table.select().execute().fetchall()
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for item in qry:
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values = {'new_status_reason': item.status_reason}
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update = table.update().where(
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table.c.id == item.id).values(values)
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migrate_engine.execute(update)
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table.c.status_reason.drop()
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table.c.new_status_reason.alter(name='status_reason')
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else:
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table.c.status_reason.alter(type=sqlalchemy.Text)
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def downgrade(migrate_engine):
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@ -29,4 +42,17 @@ def downgrade(migrate_engine):
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for tab_name in ['stack', 'resource', 'software_deployment']:
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table = sqlalchemy.Table(tab_name, meta, autoload=True)
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table.c.status_reason.alter(type=sqlalchemy.String(255))
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if migrate_engine.name == 'ibm_db_sa':
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status_reason = sqlalchemy.Column('new_status_reason',
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sqlalchemy.String(255))
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table.create_column(status_reason)
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qry = table.select().execute().fetchall()
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for item in qry:
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values = {'new_status_reason': item.status_reason}
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update = table.update().where(
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table.c.id == item.id).values(values)
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migrate_engine.execute(update)
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table.c.status_reason.drop()
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table.c.new_status_reason.alter(name='status_reason')
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else:
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table.c.status_reason.alter(type=sqlalchemy.String(255))
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