fix direct load cast number with scale < 0

src/observer/table_load/ob_table_load_obj_cast.cpp

@@ -357,7 +357,8 @@ int ObTableLoadObjCaster::to_type(const ObObjType &expect_type, const share::sch
   if (src.is_null()) {
     dst.set_null();
   } else if (src.get_type_class() == ObStringTC &&
-             (expect_type == ObNumberType || expect_type == ObUNumberType)) {
+             (expect_type == ObNumberType || expect_type == ObUNumberType) &&
+             accuracy.get_scale() >= 0) {
     ObNumberDesc d(0);
     uint32_t *digits = nullptr;
     cast_obj_ctx.number_fast_ctx_.reset();

tools/deploy/mysql_test/test_suite/direct_load_data/data/bugfix/2024090200104338801.csv

@@ -0,0 +1,9 @@
+11111
+22222
+33333
+44444
+55555
+66666
+77777
+88888
+99999