fix(snowflake): allow exclude as id var (#5764)

Author: treysp

sqlglot/dialects/snowflake.py

@@ -552,6 +552,7 @@ class Parser(parser.Parser):
 
         ID_VAR_TOKENS = {
             *parser.Parser.ID_VAR_TOKENS,
+            TokenType.EXCEPT,
             TokenType.MATCH_CONDITION,
         }
 

tests/dialects/test_snowflake.py

@@ -89,6 +89,7 @@ def test_snowflake(self):
         self.validate_identity("SELECT TRIM(COALESCE(TO_CHAR(CAST(c AS TIME)), '')) FROM t")
         self.validate_identity("SELECT GET_PATH(PARSE_JSON(foo), 'bar')")
         self.validate_identity("SELECT GET_PATH(foo, 'bar')")
+        self.validate_identity("SELECT a, exclude, b FROM xxx")
         self.validate_identity(
             "SELECT * FROM table AT (TIMESTAMP => '2024-07-24') UNPIVOT(a FOR b IN (c)) AS pivot_table"
         )