74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
/* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#include "my_global.h"
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#include <gtest/gtest.h>
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#include "test_utils.h"
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#include "item_cmpfunc.h"
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namespace item_func_case_unittest {
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using my_testing::Server_initializer;
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class ItemFuncCaseTest : public ::testing::Test
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{
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protected:
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virtual void SetUp()
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{
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initializer.SetUp();
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}
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virtual void TearDown() { initializer.TearDown(); }
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THD *thd() { return initializer.thd(); }
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Server_initializer initializer;
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};
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/*
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Bug#21381060
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A "CASE WHEN" EXPRESSION WITH NULL AND AN UNSIGNED TYPE GIVES A SIGNED RESULT
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Original test case:
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create table MyTable (`n` tinyint unsigned not null);
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insert into MyTable (n) values (180);
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select (case when 1 then n else null end) as value from MyTable;
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The returned value was signed, rather than unsigned.
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This unit test verifies that the bug is fixed in 5.7 and up.
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*/
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TEST_F(ItemFuncCaseTest, CaseWhenElseNull)
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{
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Item_int *int_one= new Item_int(1);
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Item_int *int_n= new Item_int(180ULL);
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List<Item> list;
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list.push_back(int_one);
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list.push_back(int_n);
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Item_func_case *item_case=
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new Item_func_case(POS(), list, NULL, new Item_null());
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EXPECT_FALSE(item_case->fix_fields(thd(), NULL));
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EXPECT_FALSE(int_one->unsigned_flag);
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EXPECT_TRUE(int_n->unsigned_flag);
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EXPECT_EQ(180, item_case->val_int());
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// Result should be unsigned.
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EXPECT_TRUE(item_case->unsigned_flag);
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}
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}
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