fix: timezone

Author: step-baby

src/parser.rs

@@ -4553,7 +4553,10 @@ impl<'a> Parser<'a> {
                 charset_name,
                 collation_name,
             })
-        } else if self.consume_token(&Token::Eq) || self.parse_keyword(Keyword::TO) {
+        } else if self.consume_token(&Token::Eq)
+            || self.parse_keyword(Keyword::TO)
+            || variable == ObjectName(vec!["TIMEZONE".into()])
+        {
             let mut values = vec![];
             loop {
                 let value = if let Ok(expr) = self.parse_expr() {