fix(postgres)!: support: postgres point (#6615)

* support: postgres point

* used validate_identity

Author: AbhishekASLK

sqlglot/dialects/postgres.py

@@ -374,6 +374,7 @@ class Tokenizer(tokens.Tokenizer):
             "NAME": TokenType.NAME,
             "OID": TokenType.OBJECT_IDENTIFIER,
             "ONLY": TokenType.ONLY,
+            "POINT": TokenType.POINT,
             "REFRESH": TokenType.COMMAND,
             "REINDEX": TokenType.COMMAND,
             "RESET": TokenType.COMMAND,

tests/dialects/test_postgres.py

@@ -1011,6 +1011,10 @@ def test_postgres(self):
             },
         )
         self.validate_identity("SELECT NUMRANGE(1.1, 2.2) -|- NUMRANGE(2.2, 3.3)")
+        self.validate_identity(
+            "SELECT SLOPE(point '(4,4)', point '(0,0)')",
+            "SELECT SLOPE(CAST('(4,4)' AS POINT), CAST('(0,0)' AS POINT))",
+        )
 
     def test_ddl(self):
         # Checks that user-defined types are parsed into DataType instead of Identifier