@Override
    public MapperResult getTenantIdList(MapperContext context) {
        
        return new MapperResult(
                "SELECT tenant_id FROM config_info WHERE tenant_id != '" + NamespaceUtil.getNamespaceDefaultId()
                        + "' GROUP BY tenant_id OFFSET " + context.getStartRow() + " ROWS FETCH NEXT "
                        + context.getPageSize() + " ROWS ONLY", Collections.emptyList());
    }
@Test
    void testGetTenantIdList() {
        MapperResult mapperResult = configInfoMapperByDerby.getTenantIdList(context);
        assertEquals(mapperResult.getSql(),
                "SELECT tenant_id FROM config_info WHERE tenant_id != '' GROUP BY tenant_id OFFSET " + startRow + " ROWS FETCH NEXT "
                        + pageSize + " ROWS ONLY");
        assertArrayEquals(mapperResult.getParamList().toArray(), emptyObjs);
    }