Fix parsing of COLLATE after parentheses in expressions (#507)

tests/sqlparser_common.rs

@@ -561,6 +561,15 @@ fn parse_collate() {
     );
 }
 
+#[test]
+fn parse_collate_after_parens() {
+    let sql = "SELECT (name) COLLATE \"de_DE\" FROM customer";
+    assert_matches!(
+        only(&all_dialects().verified_only_select(sql).projection),
+        SelectItem::UnnamedExpr(Expr::Collate { .. })
+    );
+}
+
 #[test]
 fn parse_select_string_predicate() {
     let sql = "SELECT id, fname, lname FROM customer \