ABAP Select data from SAP table DIAUFM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DIAUFM
*  INTO TABLE @DATA(IT_DIAUFM2).
*--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_DIAUFM INDEX 1 INTO DATA(WA_DIAUFM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DIAUFM>-MANDT = 1.
<DIAUFM>-MBLNR = 1.
<DIAUFM>-MJAHR = 1.
<DIAUFM>-ZEILE = 1.
<DIAUFM>-BLDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DIAUFM-BUDAT, sy-vline,
  WA_DIAUFM-BWART, sy-vline,
  WA_DIAUFM-MATNR, sy-vline,
  WA_DIAUFM-WERKS, sy-vline,
  WA_DIAUFM-LGORT, sy-vline,
  WA_DIAUFM-CHARG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DIAUFM 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_DIAUFM 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_DIAUFM INTO WA_DIAUFM.


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

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_DIAUFM-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIAUFM-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_DIAUFM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIAUFM-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field /CWM/ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DIAUFM-/CWM/ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIAUFM-/CWM/ERFME.
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_DIAUFM_STR, 
MANDT TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ZEILE TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
BWART TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
LIFNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
SHKZG TYPE STRING,
DMBTR TYPE STRING,
WAERS TYPE STRING,
BWTAR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ELIKZ TYPE STRING,
WEMPF TYPE STRING,
ABLAD TYPE STRING,
AUFNR TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
KZEAR TYPE STRING,
KZBEW TYPE STRING,
WEUNB TYPE STRING,
PS_PSP_PNR TYPE STRING,
NPLNR TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
SAKTO TYPE STRING,
KOKRS TYPE STRING,
/CWM/MENGE TYPE STRING,
/CWM/MEINS TYPE STRING,
/CWM/ERFMG TYPE STRING,
/CWM/ERFME TYPE STRING,
WTY_IND TYPE STRING,
MATXT TYPE STRING,
WBKNZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DIAUFM_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_DIAUFM_STR-MANDT sy-vline 
WA_DIAUFM_STR-MBLNR sy-vline 
WA_DIAUFM_STR-MJAHR sy-vline 
WA_DIAUFM_STR-ZEILE sy-vline 
WA_DIAUFM_STR-BLDAT sy-vline 
WA_DIAUFM_STR-BUDAT sy-vline 
WA_DIAUFM_STR-BWART sy-vline 
WA_DIAUFM_STR-MATNR sy-vline 
WA_DIAUFM_STR-WERKS sy-vline 
WA_DIAUFM_STR-LGORT sy-vline 
WA_DIAUFM_STR-CHARG sy-vline 
WA_DIAUFM_STR-SOBKZ sy-vline 
WA_DIAUFM_STR-LIFNR sy-vline 
WA_DIAUFM_STR-KDAUF sy-vline 
WA_DIAUFM_STR-KDPOS sy-vline 
WA_DIAUFM_STR-SHKZG sy-vline 
WA_DIAUFM_STR-DMBTR sy-vline 
WA_DIAUFM_STR-WAERS sy-vline 
WA_DIAUFM_STR-BWTAR sy-vline 
WA_DIAUFM_STR-MENGE sy-vline 
WA_DIAUFM_STR-MEINS sy-vline 
WA_DIAUFM_STR-ERFMG sy-vline 
WA_DIAUFM_STR-ERFME sy-vline 
WA_DIAUFM_STR-EBELN sy-vline 
WA_DIAUFM_STR-EBELP sy-vline 
WA_DIAUFM_STR-ELIKZ sy-vline 
WA_DIAUFM_STR-WEMPF sy-vline 
WA_DIAUFM_STR-ABLAD sy-vline 
WA_DIAUFM_STR-AUFNR sy-vline 
WA_DIAUFM_STR-RSNUM sy-vline 
WA_DIAUFM_STR-RSPOS sy-vline 
WA_DIAUFM_STR-RSART sy-vline 
WA_DIAUFM_STR-KZEAR sy-vline 
WA_DIAUFM_STR-KZBEW sy-vline 
WA_DIAUFM_STR-WEUNB sy-vline 
WA_DIAUFM_STR-PS_PSP_PNR sy-vline 
WA_DIAUFM_STR-NPLNR sy-vline 
WA_DIAUFM_STR-AUFPL sy-vline 
WA_DIAUFM_STR-APLZL sy-vline 
WA_DIAUFM_STR-SAKTO sy-vline 
WA_DIAUFM_STR-KOKRS sy-vline 
WA_DIAUFM_STR-/CWM/MENGE sy-vline 
WA_DIAUFM_STR-/CWM/MEINS sy-vline 
WA_DIAUFM_STR-/CWM/ERFMG sy-vline 
WA_DIAUFM_STR-/CWM/ERFME sy-vline 
WA_DIAUFM_STR-WTY_IND sy-vline 
WA_DIAUFM_STR-MATXT sy-vline 
WA_DIAUFM_STR-WBKNZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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