Fixed indexed column grammar: sorting can be left unspecified

Author: trueqbit

dev/statement_serializer.h

@@ -1833,14 +1833,12 @@ namespace sqlite_orm {
                 }
                 if (statement._order) {
                     switch (statement._order) {
-                        case -1:
-                            ss << " DESC";
-                            break;
                         case 1:
                             ss << " ASC";
                             break;
-                        default:
-                            throw std::system_error{orm_error_code::incorrect_order};
+                        case -1:
+                            ss << " DESC";
+                            break;
                     }
                 }
                 return ss.str();

include/sqlite_orm/sqlite_orm.h

@@ -21217,14 +21217,12 @@ namespace sqlite_orm {
                 }
                 if (statement._order) {
                     switch (statement._order) {
-                        case -1:
-                            ss << " DESC";
-                            break;
                         case 1:
                             ss << " ASC";
                             break;
-                        default:
-                            throw std::system_error{orm_error_code::incorrect_order};
+                        case -1:
+                            ss << " DESC";
+                            break;
                     }
                 }
                 return ss.str();

tests/schema/index_tests.cpp

@@ -14,6 +14,10 @@ TEST_CASE("index") {
         auto storage = make_storage({}, make_index("id_index", &User::id), table);
         REQUIRE_NOTHROW(storage.sync_schema());
     }
+    SECTION("unspecified") {
+        auto storage = make_storage({}, make_index("id_index", indexed_column(&User::id)), table);
+        REQUIRE_NOTHROW(storage.sync_schema());
+    }
     SECTION("asc") {
         auto storage = make_storage({}, make_index("id_index", indexed_column(&User::id).asc()), table);
         REQUIRE_NOTHROW(storage.sync_schema());