test: update UUID_STRING test for removed CAST

Review comments implement uuid_string

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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: 2 people

tests/dialects/test_snowflake.py

@@ -2210,6 +2210,7 @@ def test_snowflake(self):
             "SELECT UUID_STRING(), UUID_STRING('fe971b24-9572-4005-b22f-351e9c09274d', 'foo')"
         )
 
+        # Note: Snowflake's UUID_STRING returns VARCHAR, DuckDB also returns VARCHAR from string operations
         self.validate_all(
             "UUID_STRING('fe971b24-9572-4005-b22f-351e9c09274d', 'foo')",
             read={
@@ -2220,7 +2221,7 @@ def test_snowflake(self):
                 "spark2": "UUID()",
                 "spark": "UUID()",
                 "databricks": "UUID()",
-                "duckdb": "(SELECT CAST(LOWER(SUBSTRING(h, 1, 8) || '-' || SUBSTRING(h, 9, 4) || '-' || '5' || SUBSTRING(h, 14, 3) || '-' || FORMAT('{:02x}', CAST('0x' || SUBSTRING(h, 17, 2) AS INT) & 63 | 128) || SUBSTRING(h, 19, 2) || '-' || SUBSTRING(h, 21, 12)) AS UUID) FROM (SELECT SUBSTRING(SHA1(UNHEX(REPLACE('fe971b24-9572-4005-b22f-351e9c09274d', '-', '')) || ENCODE('foo')), 1, 32) AS h))",
+                "duckdb": "(SELECT LOWER(SUBSTRING(h, 1, 8) || '-' || SUBSTRING(h, 9, 4) || '-' || '5' || SUBSTRING(h, 14, 3) || '-' || FORMAT('{:02x}', CAST('0x' || SUBSTRING(h, 17, 2) AS INT) & 63 | 128) || SUBSTRING(h, 19, 2) || '-' || SUBSTRING(h, 21, 12)) FROM (SELECT SUBSTRING(SHA1(UNHEX(REPLACE('fe971b24-9572-4005-b22f-351e9c09274d', '-', '')) || ENCODE('foo')), 1, 32) AS h))",
                 "presto": "UUID()",
                 "trino": "UUID()",
                 "postgres": "GEN_RANDOM_UUID()",