FUNCTION Z_REQ_FN_INQUIRY.
*"----------------------------------------------------------------------
*"*"Local Interface:
*"  IMPORTING
*"     REFERENCE(WA_REQ) TYPE  ZFI_DISPOSAL_REQ
*"     REFERENCE(WA_REQ_STATUS) TYPE  ZFI_LOOKUP
*"     REFERENCE(WA_SERVICE) TYPE  ZFI_LOOKUP
*"  TABLES
*"      QT_REQ
*"----------------------------------------------------------------------
DATA : where_statement TYPE STRING,
       STR2 TYPE STRING,
       ERRORS TYPE INT1 VALUE 0.





WHERE_STATEMENT = 'r~ZZCOMPANY_CODE = wa_req-ZZCOMPANY_CODE'.

IF NOT wa_req-ZZCOST_CENTER IS INITIAL.
    STR2 = 'AND r~ZZCOST_CENTER = wa_req-ZZCOST_CENTER'.
    CONCATENATE where_statement STR2  INTO where_statement SEPARATED BY ' '.
ENDIF.

IF NOT wa_req-ZZSR_NUMBER IS INITIAL.
    STR2 = 'AND r~ZZSR_NUMBER = wa_req-ZZSR_NUMBER'.
    CONCATENATE where_statement STR2  INTO where_statement SEPARATED BY ' '.
ENDIF.

IF NOT wa_req-ZZDATE IS INITIAL.
  STR2 = 'AND r~ZZDATE = wa_req-ZZDATE'.
  CONCATENATE where_statement STR2  INTO where_statement SEPARATED BY ' '.
ENDIF.

IF NOT wa_req_status-ZZCODE IS INITIAL.
*  MESSAGE ID 'ZALV_ERRORS' TYPE 'I' NUMBER '000' WITH wa_req_status-ZZCODE.
  STR2 = 'AND rs~ZZCODE = wa_req_status-ZZCODE'.
  CONCATENATE where_statement STR2  INTO where_statement SEPARATED BY ' '.
ENDIF.

IF NOT wa_service-ZZCODE IS INITIAL.
*  MESSAGE ID 'ZALV_ERRORS' TYPE 'I' NUMBER '000' WITH wa_service-ZZCODE.
  STR2 = 'AND s~ZZCODE = wa_service-ZZCODE'.
  CONCATENATE where_statement STR2  INTO where_statement SEPARATED BY ' '.
ENDIF.
*MESSAGE ID 'ZALV_ERRORS' TYPE 'I' NUMBER '000' WITH where_statement.
*Select statement

* WRITE : / WHERE_STATEMENT.
    SELECT  r~ZZSR_NUMBER r~ZZCOMPANY_CODE r~ZZCOST_CENTER  r~ZZDATE s~ZZDESC rs~ZZDESC r~CREA_USER r~CREA_TIME r~CHNG_USER r~CHNG_TIME
    INTO  TABLE qt_req
    FROM ZFI_DISPOSAL_REQ as r
    INNER JOIN ZFI_LOOKUP as s ON  s~ZZLKUPID = r~ZZSERVICE_TYPE
    INNER JOIN ZFI_LOOKUP as rs ON  rs~ZZLKUPID = r~ZZRQSTTS
    WHERE   (WHERE_STATEMENT).

IF  SY-SUBRC <> 0.
MESSAGE ID 'ZINSERTION_ERRORS' TYPE 'I' NUMBER '012'.
ENDIF.

ENDFUNCTION.