CDS View, Problem mit Case expression

Code: Alles auswählen.

define view Zcds_Rs_Fauf with parameters lv_datum : erdat,
                                         lv_timestamp : CMIG_TIMESTAMP,
                                         lv_zaehl : char1,
                                         lv_sttxt : co_sttxt,
                                         lv_gltrp : co_gltrp
                                         
    as select from afko as afko

    inner join aufk as aufk 
        on aufk.aufnr = afko.aufnr

    inner join afpo as afpo
        on afpo.aufnr = afko.aufnr

    inner join marc as marc
        on marc.matnr = afpo.matnr
        and marc.werks = afpo.dwerk

    left outer join mbew as mbew
        on  mbew.matnr = afpo.matnr
        and mbew.bwkey = afpo.dwerk

    left outer join Zcds_Rs_Jest as jest
        on jest.objnr = aufk.objnr


{

    afko.mandt,
    afko.aufnr,
    afpo.posnr,
    cast (:lv_datum as datum) as datum ,
    cast (:lv_timestamp as cmig_timestamp) as timestamp,
    cast (:lv_zaehl as char01) as zaehl, 
    aufk.aenam,
    aufk.aedat,
    afko.gltrp,
    afpo.ltrmi,
    afko.gstrp,
    afko.gstri,
    afko.dispo,
    afko.fevor,
    afpo.meins,
    afpo.matnr,
    afpo.psmng,
    case 
        when mbew.peinh > 0
            then  afpo.psmng * mbew.stprs / mbew.peinh
            
    end as pswert, 
    afpo.wemng,
    (cast(afpo.psmng as zrsmeng) - cast(afpo.wemng as zrsmeng)) as zrsmeng,
    cast (afpo.wewrt as zrswert) as zrswert,                 
    afpo.uebto,
    afpo.untto,
    afpo.lgort,
    cast(:lv_sttxt as co_sttxt) as sttxt,
    afpo.elikz,
    aufk.loekz,
    afpo.xloek,
    afpo.dwerk,
    afpo.dauat,
    afpo.wewrt,
    aufk.waers,
    afko.ftrms,
    afko.gltrs,
    afko.gstrs,
    afko.ftrmi,
    case 
        when jest.stat = 'I0012'
            then 'X'
        when jest.stat = 'I0045'
            then 'X'
        when jest.stat = 'I0046'
            then 'X'
        else ''
    end as jest
}

    where afko.gltrp < :lv_gltrp 
      and aufk.loekz = ' '
      and aufk.idat2 = '00000000'
      and afpo.elikz = ' '
      and afpo.xloek = ' '