add support for GeneratedField

django_snowflake/features.py

@@ -57,6 +57,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     supports_transactions = False
     # This feature is specific to the Django fork used for testing.
     supports_tz_offsets = False
+    supports_virtual_generated_columns = True
     uses_savepoints = False
     ignores_table_name_case = True
     test_collations = {
@@ -67,6 +68,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
         'cs': None,
         'non_default': 'en-ci',
         'swedish_ci': 'sv-ci',
+        'virtual': None,
     }
     test_now_utc_template = 'SYSDATE()'
 

django_snowflake/schema.py

@@ -95,6 +95,8 @@ def column_sql(self, model, field, include_default=False, exclude_not_null=False
         collation = db_params.get('collation')
         if collation:
             sql += self._collate_sql(collation)
+        if field.generated:
+            sql += self._column_generated_sql(field)
         if not field.null and not exclude_not_null:
             sql += " NOT NULL"
         # Add database default.
@@ -158,6 +160,13 @@ def _alter_field(self, model, old_field, new_field, old_type, new_type,
                 },
             })
 
+    def _column_generated_sql(self, field):
+        """Return the SQL to use in a GENERATED ALWAYS clause."""
+        expression_sql, params = field.generated_sql(self.connection)
+        if params:
+            expression_sql = expression_sql % tuple(self.quote_value(p) for p in params)
+        return f" AS ({expression_sql})"
+
     def quote_value(self, value):
         if isinstance(value, str):
             return "'%s'" % value.replace("'", "\\'")