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#!/usr/bin/env python
# -*- coding: utf-8 -*-
from migrate.versioning.script import base
class SqlScript(base.BaseScript):
"""A file containing plain SQL statements."""
# TODO: why is step parameter even here?
def run(self, engine, step=None):
"""Runs SQL script through raw dbapi execute call"""
text = self.source()
# Don't rely on SA's autocommit here
# (SA uses .startswith to check if a commit is needed. What if script
# starts with a comment?)
conn = engine.connect()
try:
trans = conn.begin()
try:
# HACK: SQLite doesn't allow multiple statements through
# its execute() method, but it provides executescript() instead
dbapi = conn.engine.raw_connection()
if getattr(dbapi, 'executescript', None):
dbapi.executescript(text)
else:
conn.execute(text)
trans.commit()
except:
trans.rollback()
raise
finally:
conn.close()
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