SELECT a.FASSIGNID, a.FTITLE, a.FCONTENT, a.FSENDERID, b.FNAME FSENDERNAME, a.FISSUPPORTWB 

FROM V_WF_ASSIGN A INNER JOIN T_SEC_USER B ON a.FSENDERID = b.FUSERID WHERE a.FRECEIVERID = :FRECEIVERID ORDER BY FCREATETIME DESC

这条执行了很长时间，能看出哪有问题吗？