[postgis-users] GEOS touches() problem

[caij at lreis.ac.cn]

Hi all!
     Today,I used the function touches() and i came across a problem.It throws an error!
     NOTICE: TopologyException:side location conflict(x,y,z)
    and SQL QUERY is like this:
    select astext(wkb_geometry),ogc_fid from (select ogc_fid,wkb_geometry from daxing where wkb_geometry && (select wkb_geometry from daxing where ogc_fid=23658 ) and (level=6) or (level>6 and isleaf=1) or (level>6 and child_level<6 )) as temprec where touches(wkb_geometry,(select wkb_geometry from daxing where ogc_fid=23658))
     Expect for ur help!
     Waiting for u all!