add test case

be/src/vec/columns/column_object.cpp

@@ -812,8 +812,11 @@ void ColumnObject::Subcolumn::get(size_t n, Field& res) const {
     }
 
     ind -= num_of_defaults_in_prefix;
-    for (const auto& part : data) {
+    for (size_t i = 0; i < data.size(); ++i) {
+        const auto& part = data[i];
+        const auto& part_type = data_types[i];
         if (ind < part->size()) {
+            res = vectorized::remove_nullable(part_type)->get_default();
             part->get(ind, res);
             Field new_field;
             convert_field_to_type(res, *least_common_type.get(), &new_field);

regression-test/data/variant_p0/rqg/rqg1.out

@@ -0,0 +1,215 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !rqg1 --
+0
+
+-- !rqg1_2 --
+24
+
+-- !rqg1_3 --
+0
+
+-- !rqg1_4 --
+24
+
+-- !rqg1_5 --
+0
+
+-- !rqg1_6 --
+24
+
+-- !rqg1_7 --
+0
+
+-- !rqg1_8 --
+24
+
+-- !rqg1_9 --
+0
+
+-- !rqg1_10 --
+25
+
+-- !rqg1_11 --
+0
+
+-- !rqg1_12 --
+24
+
+-- !rqg1_13 --
+0
+
+-- !rqg1_14 --
+24
+
+-- !rqg1_15 --
+0
+
+-- !rqg1_16 --
+0
+
+-- !rqg1_17 --
+24
+
+-- !rqg1_18 --
+24
+
+-- !rqg1_19 --
+0
+
+-- !rqg1_20 --
+24
+
+-- !rqg1_21 --
+0
+
+-- !rqg1_22 --
+0
+
+-- !rqg1_23 --
+24
+
+-- !rqg1_24 --
+25
+
+-- !rqg1_25 --
+0
+
+-- !rqg1_26 --
+25
+
+-- !rqg1_27 --
+0
+
+-- !rqg1_28 --
+24
+
+-- !rqg1_29 --
+0
+
+-- !rqg1_30 --
+24
+
+-- !rqg1_31 --
+0
+
+-- !rqg1_32 --
+24
+
+-- !rqg1_33 --
+0
+
+-- !rqg1_34 --
+24
+
+-- !rqg1_35 --
+0
+
+-- !rqg1_36 --
+25
+
+-- !rqg1_37 --
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+0
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+1
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+2
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+3
+

regression-test/suites/variant_p0/rqg/load.groovy

@@ -0,0 +1,23 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+import org.codehaus.groovy.runtime.IOGroovyMethods
+
+suite("regression_test_variant_rqg_p0", "p0"){
+    sql """DROP DATABASE regression_test_variant_p0_rqg""" 
+    sql """CREATE DATABASE regression_test_variant_p0_rqg""" 
+}