//sql := "SELECT ls.id source_systemid, ls.system_name source_systemname, ls1.system_name consume_systemname, da.* FROM t_dataex_dataaccess da LEFT JOIN t_dataex_datasource ds ON da.datasource_id = ds.id LEFT JOIN t_dataex_linksystem ls ON ls.id = ds.system_id LEFT JOIN t_dataex_linksystem ls1 ON ls1.id = da.consume_systemid" + query.Conditions