@Override
    public Object getObject(final int columnIndex) throws SQLException {
        return mergeResultSet.getValue(columnIndex, Object.class);
    }
@Test
    void assertGetObjectWithBigDecimal() throws SQLException {
        BigDecimal result = new BigDecimal("0");
        when(mergeResultSet.getValue(1, BigDecimal.class)).thenReturn(result);
        assertThat(shardingSphereResultSet.getObject(1, BigDecimal.class), is(result));
    }