Migrate from setup.py and setup.cfg to pyproject.toml

src/django_migration_linter/sql_analyser/mysql.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+import re
+
+from .base import BaseAnalyser, Check, CheckMode, CheckType
+
+
+class MySqlAnalyser(BaseAnalyser):
+    migration_checks: list[Check] = [
+        Check(
+            code="ALTER_COLUMN",
+            fn=lambda sql, **kw: re.search("ALTER TABLE .* MODIFY .* (?!NULL);?$", sql),
+            message=(
+                "ALTERING columns (Could be backward compatible. "
+                "You may ignore this migration.)"
+            ),
+            mode=CheckMode.ONE_LINER,
+            type=CheckType.ERROR,
+        ),
+    ]
+
+    @staticmethod
+    def detect_column(sql: list[str] | str) -> str | None:
+        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)
+        return None