feat(generator): unsupported warning for T-SQL query option (#4972)

Author: geooo109

sqlglot/generator.py

@@ -2581,6 +2581,7 @@ def options_modifier(self, expression: exp.Expression) -> str:
         return f" {options}" if options else ""
 
     def queryoption_sql(self, expression: exp.QueryOption) -> str:
+        self.unsupported("Unsupported query option.")
         return ""
 
     def offset_limit_modifiers(

tests/dialects/test_tsql.py

@@ -559,6 +559,14 @@ def test_option(self):
             with self.assertRaises(ParseError, msg=f"When running '{query}'"):
                 self.parse_one(query)
 
+        self.validate_all(
+            "SELECT col FROM t OPTION(LABEL = 'foo')",
+            write={
+                "tsql": "SELECT col FROM t OPTION(LABEL = 'foo')",
+                "databricks": UnsupportedError,
+            },
+        )
+
     def test_types(self):
         self.validate_identity("CAST(x AS XML)")
         self.validate_identity("CAST(x AS UNIQUEIDENTIFIER)")