@Override
    public Object getObject(final int columnIndex) throws SQLException {
        return mergeResultSet.getValue(columnIndex, Object.class);
    }
@Test
    void assertGetObjectWithColumnIndex() throws SQLException {
        when(mergeResultSet.getValue(1, Object.class)).thenReturn("object_value");
        assertThat(shardingSphereResultSet.getObject(1), is("object_value"));
    }