Support scan into int, string data types

finisher_api.go

@@ -384,7 +384,9 @@ func (db *DB) Pluck(column string, dest interface{}) (tx *DB) {
 
 func (db *DB) ScanRows(rows *sql.Rows, dest interface{}) error {
 	tx := db.getInstance()
-	tx.Error = tx.Statement.Parse(dest)
+	if err := tx.Statement.Parse(dest); !errors.Is(err, schema.ErrUnsupportedDataType) {
+		tx.AddError(err)
+	}
 	tx.Statement.Dest = dest
 	tx.Statement.ReflectValue = reflect.ValueOf(dest)
 	for tx.Statement.ReflectValue.Kind() == reflect.Ptr {

scan.go

@@ -82,7 +82,7 @@ func Scan(rows *sql.Rows, db *DB, initialized bool) {
 			scanIntoMap(mapValue, values, columns)
 			*dest = append(*dest, mapValue)
 		}
-	case *int, *int64, *uint, *uint64, *float32, *float64:
+	case *int, *int64, *uint, *uint64, *float32, *float64, *string:
 		for initialized || rows.Next() {
 			initialized = false
 			db.RowsAffected++

tests/scan_test.go

@@ -91,4 +91,14 @@ func TestScanRows(t *testing.T) {
 	if !reflect.DeepEqual(results, []Result{{Name: "ScanRowsUser2", Age: 10}, {Name: "ScanRowsUser3", Age: 20}}) {
 		t.Errorf("Should find expected results")
 	}
+
+	var ages int
+	if err := DB.Table("users").Where("name = ? or name = ?", user2.Name, user3.Name).Select("SUM(age)").Scan(&ages).Error; err != nil || ages != 30 {
+		t.Fatalf("failed to scan ages, got error %v, ages: %v", err, ages)
+	}
+
+	var name string
+	if err := DB.Table("users").Where("name = ?", user2.Name).Select("name").Scan(&name).Error; err != nil || name != user2.Name {
+		t.Fatalf("failed to scan ages, got error %v, ages: %v", err, name)
+	}
 }