ABAP Select data from SAP table PMUN4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PMUN4 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 PMUN4. 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 PMUN4 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_PMUN4 TYPE STANDARD TABLE OF PMUN4,
      WA_PMUN4 TYPE PMUN4,
      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: <PMUN4> TYPE PMUN4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PMUN4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PMUN4
  INTO TABLE IT_PMUN4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMUN4
*  INTO TABLE @DATA(IT_PMUN42).
*--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_PMUN4 INDEX 1 INTO DATA(WA_PMUN42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PMUN4 ASSIGNING <PMUN4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMUN4>-KDGBR = 1.
<PMUN4>-KDART = 1.
<PMUN4>-INTKY = 1.
<PMUN4>-KDBSL = 1.
<PMUN4>-OBJPS = 1.

ENDLOOP.

LOOP AT IT_PMUN4 INTO WA_PMUN4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMUN4-FAMST, sy-vline,
  WA_PMUN4-PERSG, sy-vline,
  WA_PMUN4-PERSK, sy-vline,
  WA_PMUN4-TRFAR, sy-vline,
  WA_PMUN4-TRFGB, sy-vline,
  WA_PMUN4-TRFGR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMUN4 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_PMUN4 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_PMUN4 INTO WA_PMUN4.


*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 PDATE, internal->external for field FGBDT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PMUN4-FGBDT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMUN4-FGBDT.
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_PMUN4_STR, 
KDGBR TYPE STRING,
KDART TYPE STRING,
INTKY TYPE STRING,
KDBSL TYPE STRING,
OBJPS TYPE STRING,
FAMST TYPE STRING,
PERSG TYPE STRING,
PERSK TYPE STRING,
TRFAR TYPE STRING,
TRFGB TYPE STRING,
TRFGR TYPE STRING,
TRFST TYPE STRING,
WERKS TYPE STRING,
BTRTL TYPE STRING,
DSTAT TYPE STRING,
DSCAT TYPE STRING,
EWERK TYPE STRING,
EBTRT TYPE STRING,
EDSTA TYPE STRING,
EDSCA TYPE STRING,
DPIND TYPE STRING,
DPAGE TYPE STRING,
DPNAT TYPE STRING,
FGBDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMUN4_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_PMUN4_STR-KDGBR sy-vline 
WA_PMUN4_STR-KDART sy-vline 
WA_PMUN4_STR-INTKY sy-vline 
WA_PMUN4_STR-KDBSL sy-vline 
WA_PMUN4_STR-OBJPS sy-vline 
WA_PMUN4_STR-FAMST sy-vline 
WA_PMUN4_STR-PERSG sy-vline 
WA_PMUN4_STR-PERSK sy-vline 
WA_PMUN4_STR-TRFAR sy-vline 
WA_PMUN4_STR-TRFGB sy-vline 
WA_PMUN4_STR-TRFGR sy-vline 
WA_PMUN4_STR-TRFST sy-vline 
WA_PMUN4_STR-WERKS sy-vline 
WA_PMUN4_STR-BTRTL sy-vline 
WA_PMUN4_STR-DSTAT sy-vline 
WA_PMUN4_STR-DSCAT sy-vline 
WA_PMUN4_STR-EWERK sy-vline 
WA_PMUN4_STR-EBTRT sy-vline 
WA_PMUN4_STR-EDSTA sy-vline 
WA_PMUN4_STR-EDSCA sy-vline 
WA_PMUN4_STR-DPIND sy-vline 
WA_PMUN4_STR-DPAGE sy-vline 
WA_PMUN4_STR-DPNAT sy-vline 
WA_PMUN4_STR-FGBDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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