Adding upstream version 23.13.1.

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

sqlglot/dialects/duckdb.py

@@ -280,6 +280,8 @@ class DuckDB(Dialect):
             "RANGE": _build_generate_series(end_exclusive=True),
         }
 
+        FUNCTIONS.pop("DATE_SUB")
+
         FUNCTION_PARSERS = parser.Parser.FUNCTION_PARSERS.copy()
         FUNCTION_PARSERS.pop("DECODE")
 
@@ -365,6 +367,7 @@ class DuckDB(Dialect):
         MULTI_ARG_DISTINCT = False
         CAN_IMPLEMENT_ARRAY_ANY = True
         SUPPORTS_TO_NUMBER = False
+        COPY_HAS_INTO_KEYWORD = False
 
         TRANSFORMS = {
             **generator.Generator.TRANSFORMS,