@Override
    public Array getArray(final int columnIndex) throws SQLException {
        return (Array) mergeResultSet.getValue(columnIndex, Array.class);
    }
@Test
    void assertGetArrayWithColumnIndex() throws SQLException {
        Array array = mock(Array.class);
        when(mergeResultSet.getValue(1, Array.class)).thenReturn(array);
        assertThat(shardingSphereResultSet.getArray(1), is(array));
    }