[bugfix] fix coredump caused by nullable const column compare to non-nullable const column (#11227)

be/src/vec/columns/column_const.h

@@ -21,6 +21,7 @@
 #pragma once
 
 #include "vec/columns/column.h"
+#include "vec/columns/column_nullable.h"
 #include "vec/common/assert_cast.h"
 #include "vec/common/exception.h"
 #include "vec/common/typeid_cast.h"
@@ -144,8 +145,22 @@ public:
     size_t allocated_bytes() const override { return data->allocated_bytes() + sizeof(s); }
 
     int compare_at(size_t, size_t, const IColumn& rhs, int nan_direction_hint) const override {
-        return data->compare_at(0, 0, *assert_cast<const ColumnConst&>(rhs).data,
-                                nan_direction_hint);
+        auto rhs_const_column = assert_cast<const ColumnConst&>(rhs);
+
+        auto* this_nullable = check_and_get_column<ColumnNullable>(data.get());
+        auto* rhs_nullable = check_and_get_column<ColumnNullable>(rhs_const_column.data.get());
+        if (this_nullable && rhs_nullable) {
+            return data->compare_at(0, 0, *rhs_const_column.data, nan_direction_hint);
+        } else if (this_nullable) {
+            auto rhs_nullable_column = make_nullable(rhs_const_column.data, false);
+            return this_nullable->compare_at(0, 0, *rhs_nullable_column, nan_direction_hint);
+        } else if (rhs_nullable) {
+            auto this_nullable_column = make_nullable(data, false);
+            return this_nullable_column->compare_at(0, 0, *rhs_const_column.data,
+                                                    nan_direction_hint);
+        } else {
+            return data->compare_at(0, 0, *rhs_const_column.data, nan_direction_hint);
+        }
     }
 
     MutableColumns scatter(ColumnIndex num_columns, const Selector& selector) const override;

regression-test/data/correctness/sql/test_ifnull_function1.out

@@ -0,0 +1,4 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !test_ifnull_function1 --
+false
+

regression-test/data/correctness/sql/test_ifnull_function2.out

@@ -0,0 +1,4 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !test_ifnull_function2 --
+true
+

regression-test/suites/correctness/sql/test_ifnull_function1.sql

@@ -0,0 +1,18 @@
+-- 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.
+
+select IFNULL(get_json_string('{"k1":"v1", "k2":"v2"}', "$.k1"), 'SUCCESS')= 'FAIL';

regression-test/suites/correctness/sql/test_ifnull_function2.sql

@@ -0,0 +1,18 @@
+-- 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.
+
+select IFNULL(get_json_string('{"k1":"FAIL", "k2":"v2"}', "$.k1"), 'SUCCESS')= 'FAIL';