ABAP Select data from SAP table CNMMAFVG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNMMAFVG 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 CNMMAFVG. 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 CNMMAFVG 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_CNMMAFVG TYPE STANDARD TABLE OF CNMMAFVG,
      WA_CNMMAFVG TYPE CNMMAFVG,
      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: <CNMMAFVG> TYPE CNMMAFVG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNMMAFVG
*  INTO TABLE @DATA(IT_CNMMAFVG2).
*--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_CNMMAFVG INDEX 1 INTO DATA(WA_CNMMAFVG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNMMAFVG>-AUFNRD = 1.
<CNMMAFVG>-VORNR = 1.
<CNMMAFVG>-LTXA1 = 1.
<CNMMAFVG>-WERKS = 1.
<CNMMAFVG>-ARBPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNMMAFVG-MGVRG, sy-vline,
  WA_CNMMAFVG-MEINH, sy-vline,
  WA_CNMMAFVG-AUDISP, sy-vline,
  WA_CNMMAFVG-PROJN, sy-vline,
  WA_CNMMAFVG-INFNR, sy-vline,
  WA_CNMMAFVG-EKGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNMMAFVG 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_CNMMAFVG 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_CNMMAFVG INTO WA_CNMMAFVG.


*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 AUFNRD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMAFVG-AUFNRD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMAFVG-AUFNRD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CNMMAFVG-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMAFVG-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNMMAFVG-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMAFVG-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PROJN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CNMMAFVG-PROJN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMAFVG-PROJN.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field SAKTO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNMMAFVG-SAKTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMMAFVG-SAKTO.
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_CNMMAFVG_STR, 
AUFNRD TYPE STRING,
VORNR TYPE STRING,
LTXA1 TYPE STRING,
WERKS TYPE STRING,
ARBPL TYPE STRING,
MGVRG TYPE STRING,
MEINH TYPE STRING,
AUDISP TYPE STRING,
PROJN TYPE STRING,
INFNR TYPE STRING,
EKGRP TYPE STRING,
EKORG TYPE STRING,
LIFNR TYPE STRING,
SAKTO TYPE STRING,
MATKL TYPE STRING,
SORTL TYPE STRING,
AFNAM TYPE STRING,
WEMPF TYPE STRING,
BEDNR TYPE STRING,
ABLAD TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNMMAFVG_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_CNMMAFVG_STR-AUFNRD sy-vline 
WA_CNMMAFVG_STR-VORNR sy-vline 
WA_CNMMAFVG_STR-LTXA1 sy-vline 
WA_CNMMAFVG_STR-WERKS sy-vline 
WA_CNMMAFVG_STR-ARBPL sy-vline 
WA_CNMMAFVG_STR-MGVRG sy-vline 
WA_CNMMAFVG_STR-MEINH sy-vline 
WA_CNMMAFVG_STR-AUDISP sy-vline 
WA_CNMMAFVG_STR-PROJN sy-vline 
WA_CNMMAFVG_STR-INFNR sy-vline 
WA_CNMMAFVG_STR-EKGRP sy-vline 
WA_CNMMAFVG_STR-EKORG sy-vline 
WA_CNMMAFVG_STR-LIFNR sy-vline 
WA_CNMMAFVG_STR-SAKTO sy-vline 
WA_CNMMAFVG_STR-MATKL sy-vline 
WA_CNMMAFVG_STR-SORTL sy-vline 
WA_CNMMAFVG_STR-AFNAM sy-vline 
WA_CNMMAFVG_STR-WEMPF sy-vline 
WA_CNMMAFVG_STR-BEDNR sy-vline 
WA_CNMMAFVG_STR-ABLAD sy-vline 
WA_CNMMAFVG_STR-AUFPL sy-vline 
WA_CNMMAFVG_STR-APLZL sy-vline      INTO ld_text SEPARATED BY SPACE.

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