ABAP Select data from SAP table CNFM_FMHBL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNFM_FMHBL table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to CNFM_FMHBL. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the CNFM_FMHBL table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_CNFM_FMHBL TYPE STANDARD TABLE OF CNFM_FMHBL,
      WA_CNFM_FMHBL TYPE CNFM_FMHBL,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <CNFM_FMHBL> TYPE CNFM_FMHBL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNFM_FMHBL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNFM_FMHBL
  INTO TABLE IT_CNFM_FMHBL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNFM_FMHBL
*  INTO TABLE @DATA(IT_CNFM_FMHBL2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_CNFM_FMHBL INDEX 1 INTO DATA(WA_CNFM_FMHBL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNFM_FMHBL ASSIGNING <CNFM_FMHBL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNFM_FMHBL>-CLIENT = 1.
<CNFM_FMHBL>-FM_AREA = 1.
<CNFM_FMHBL>-CRTUSER = 1.
<CNFM_FMHBL>-DOCNR = 1.
<CNFM_FMHBL>-DOCLN = 1.

ENDLOOP.

LOOP AT IT_CNFM_FMHBL INTO WA_CNFM_FMHBL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNFM_FMHBL-RPMAX, sy-vline,
  WA_CNFM_FMHBL-BGTSRC, sy-vline,
  WA_CNFM_FMHBL-BGTDTL, sy-vline,
  WA_CNFM_FMHBL-PAYTYP, sy-vline,
  WA_CNFM_FMHBL-PAYKID, sy-vline,
  WA_CNFM_FMHBL-PROCNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNFM_FMHBL you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_CNFM_FMHBL TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_CNFM_FMHBL INTO WA_CNFM_FMHBL.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNFM_FMHBL-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNFM_FMHBL-DOCNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CNFM_FMHBL_STR, 
CLIENT TYPE STRING,
FM_AREA TYPE STRING,
CRTUSER TYPE STRING,
DOCNR TYPE STRING,
DOCLN TYPE STRING,
RPMAX TYPE STRING,
BGTSRC TYPE STRING,
BGTDTL TYPE STRING,
PAYTYP TYPE STRING,
PAYKID TYPE STRING,
PROCNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNFM_FMHBL_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_CNFM_FMHBL_STR-CLIENT sy-vline 
WA_CNFM_FMHBL_STR-FM_AREA sy-vline 
WA_CNFM_FMHBL_STR-CRTUSER sy-vline 
WA_CNFM_FMHBL_STR-DOCNR sy-vline 
WA_CNFM_FMHBL_STR-DOCLN sy-vline 
WA_CNFM_FMHBL_STR-RPMAX sy-vline 
WA_CNFM_FMHBL_STR-BGTSRC sy-vline 
WA_CNFM_FMHBL_STR-BGTDTL sy-vline 
WA_CNFM_FMHBL_STR-PAYTYP sy-vline 
WA_CNFM_FMHBL_STR-PAYKID sy-vline 
WA_CNFM_FMHBL_STR-PROCNO sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.