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django-migration-linter/django_migration_linter/sql_analyser/mysql.py
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Python

# Copyright 2019 3YOURMIND GmbH
# 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.
import re
from .base import BaseAnalyser
class MySqlAnalyser(BaseAnalyser):
migration_tests = [
{
"code": "ALTER_COLUMN",
"fn": lambda sql, **kw: re.search(
"ALTER TABLE .* MODIFY .* (?!NULL);?$", sql
),
"mode": "one_liner",
}
]
@staticmethod
def detect_column(sql):
if isinstance(sql, str):
regex_result = re.search("COLUMN [`\"'](.*?)[`\"']", sql, re.IGNORECASE)
if regex_result:
return regex_result.group(1)
regex_result = re.search("MODIFY [`\"'](.*?)[`\"']", sql, re.IGNORECASE)
if regex_result:
return regex_result.group(1)