@Override
    public int hashCode() {
        return Objects.hashCode(dataSourceName.toUpperCase(), tableName.toUpperCase(), null == schemaName ? null : schemaName.toUpperCase());
    }
@Test
    void assertHashCode() {
        assertThat(new DataNode("ds_0.tbl_0").hashCode(), is(new DataNode("ds_0.tbl_0").hashCode()));
    }