Adding upstream version 18.5.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

sqlglot/dialects/redshift.py

@@ -30,6 +30,8 @@ class Redshift(Postgres):
     # https://docs.aws.amazon.com/redshift/latest/dg/r_names.html
     RESOLVES_IDENTIFIERS_AS_UPPERCASE = None
 
+    SUPPORTS_USER_DEFINED_TYPES = False
+
     TIME_FORMAT = "'YYYY-MM-DD HH:MI:SS'"
     TIME_MAPPING = {
         **Postgres.TIME_MAPPING,
@@ -38,8 +40,6 @@ class Redshift(Postgres):
     }
 
     class Parser(Postgres.Parser):
-        SUPPORTS_USER_DEFINED_TYPES = False
-
         FUNCTIONS = {
             **Postgres.Parser.FUNCTIONS,
             "ADD_MONTHS": lambda args: exp.DateAdd(