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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import logging
import shutil
from migrate.versioning.script import base
from migrate.versioning.template import Template
log = logging.getLogger(__name__)
class SqlScript(base.BaseScript):
"""A file containing plain SQL statements."""
@classmethod
def create(cls, path, **opts):
"""Create an empty migration script at specified path
:returns: :class:`SqlScript instance <migrate.versioning.script.sql.SqlScript>`"""
cls.require_notfound(path)
src = Template(opts.pop('templates_path', None)).get_sql_script(theme=opts.pop('templates_theme', None))
shutil.copy(src, path)
return cls(path)
# TODO: why is step parameter even here?
def run(self, engine, step=None, executemany=True):
"""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 executemany and getattr(dbapi, 'executescript', None):
dbapi.executescript(text)
else:
conn.execute(text)
trans.commit()
except:
trans.rollback()
raise
finally:
conn.close()
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