Fix(bigquery): respect normalization strategy patching

Author: georgesittas

sqlglot/dialects/bigquery.py

@@ -441,7 +441,7 @@ class BigQuery(Dialect):
     def normalize_identifier(self, expression: E) -> E:
         if (
             isinstance(expression, exp.Identifier)
-            and self.normalization_strategy is self.NORMALIZATION_STRATEGY
+            and self.normalization_strategy is NormalizationStrategy.CASE_INSENSITIVE
         ):
             parent = expression.parent
             while isinstance(parent, exp.Dot):

tests/dialects/test_bigquery.py

@@ -2387,5 +2387,16 @@ def test_annotate_timestamps(self):
     def test_override_normalization_strategy(self):
         sql = "SELECT * FROM p.d.t"
         ast = self.parse_one(sql)
-        qualified = qualify(ast, dialect="bigquery,normalization_strategy=uppercase")
+        qualified = qualify(ast.copy(), dialect="bigquery,normalization_strategy=uppercase")
         self.assertEqual(qualified.sql("bigquery"), "SELECT * FROM `P`.`D`.`T` AS `T`")
+
+        from sqlglot.dialects import BigQuery
+        from sqlglot.dialects.dialect import NormalizationStrategy
+
+        try:
+            BigQuery.NORMALIZATION_STRATEGY = NormalizationStrategy.UPPERCASE
+
+            qualified = qualify(ast.copy(), dialect="bigquery,normalization_strategy=uppercase")
+            self.assertEqual(qualified.sql("bigquery"), "SELECT * FROM `P`.`D`.`T` AS `T`")
+        finally:
+            BigQuery.NORMALIZATION_STRATEGY = NormalizationStrategy.CASE_INSENSITIVE