ABAP Select data from SAP table UMG_S20 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP UMG_S20 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 UMG_S20. 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 UMG_S20 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_UMG_S20 TYPE STANDARD TABLE OF UMG_S20,
      WA_UMG_S20 TYPE UMG_S20,
      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: <UMG_S20> TYPE UMG_S20.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_UMG_S20.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM UMG_S20
  INTO TABLE IT_UMG_S20.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UMG_S20
*  INTO TABLE @DATA(IT_UMG_S202).
*--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_UMG_S20 INDEX 1 INTO DATA(WA_UMG_S202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_UMG_S20 ASSIGNING <UMG_S20>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UMG_S20>-ERSDA = 1.
<UMG_S20>-ERNAM = 1.
<UMG_S20>-LAEDA = 1.
<UMG_S20>-AENAM = 1.
<UMG_S20>-VPSTA = 1.

ENDLOOP.

LOOP AT IT_UMG_S20 INTO WA_UMG_S20.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UMG_S20-PSTAT, sy-vline,
  WA_UMG_S20-LVORM, sy-vline,
  WA_UMG_S20-MTART, sy-vline,
  WA_UMG_S20-MBRSH, sy-vline,
  WA_UMG_S20-MATKL, sy-vline,
  WA_UMG_S20-BISMT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UMG_S20 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_UMG_S20 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_UMG_S20 INTO WA_UMG_S20.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_UMG_S20_STR, 
ERSDA TYPE STRING,
ERNAM TYPE STRING,
LAEDA TYPE STRING,
AENAM TYPE STRING,
VPSTA TYPE STRING,
PSTAT TYPE STRING,
LVORM TYPE STRING,
MTART TYPE STRING,
MBRSH TYPE STRING,
MATKL TYPE STRING,
BISMT TYPE STRING,
MEINS TYPE STRING,
BSTME TYPE STRING,
ZEINR TYPE STRING,
ZEIAR TYPE STRING,
ZEIVR TYPE STRING,
ZEIFO TYPE STRING,
AESZN TYPE STRING,
BLATT TYPE STRING,
BLANZ TYPE STRING,
FERTH TYPE STRING,
FORMT TYPE STRING,
GROES TYPE STRING,
WRKST TYPE STRING,
NORMT TYPE STRING,
LABOR TYPE STRING,
EKWSL TYPE STRING,
BRGEW TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
BEHVO TYPE STRING,
RAUBE TYPE STRING,
TEMPB TYPE STRING,
DISST TYPE STRING,
TRAGR TYPE STRING,
STOFF TYPE STRING,
SPART TYPE STRING,
KUNNR TYPE STRING,
EANNR TYPE STRING,
WESCH TYPE STRING,
BWVOR TYPE STRING,
BWSCL TYPE STRING,
SAISO TYPE STRING,
ETIAR TYPE STRING,
ETIFO TYPE STRING,
ENTAR TYPE STRING,
EAN11 TYPE STRING,
NUMTP TYPE STRING,
LAENG TYPE STRING,
BREIT TYPE STRING,
HOEHE TYPE STRING,
MEABM TYPE STRING,
PRDHA TYPE STRING,
AEKLK TYPE STRING,
CADKZ TYPE STRING,
QMPUR TYPE STRING,
ERGEW TYPE STRING,
ERGEI TYPE STRING,
ERVOL TYPE STRING,
ERVOE TYPE STRING,
GEWTO TYPE STRING,
VOLTO TYPE STRING,
VABME TYPE STRING,
KZREV TYPE STRING,
KZKFG TYPE STRING,
XCHPF TYPE STRING,
VHART TYPE STRING,
FUELG TYPE STRING,
STFAK TYPE STRING,
MAGRV TYPE STRING,
BEGRU TYPE STRING,
DATAB TYPE STRING,
LIQDT TYPE STRING,
SAISJ TYPE STRING,
PLGTP TYPE STRING,
MLGUT TYPE STRING,
EXTWG TYPE STRING,
SATNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UMG_S20_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_UMG_S20_STR-ERSDA sy-vline 
WA_UMG_S20_STR-ERNAM sy-vline 
WA_UMG_S20_STR-LAEDA sy-vline 
WA_UMG_S20_STR-AENAM sy-vline 
WA_UMG_S20_STR-VPSTA sy-vline 
WA_UMG_S20_STR-PSTAT sy-vline 
WA_UMG_S20_STR-LVORM sy-vline 
WA_UMG_S20_STR-MTART sy-vline 
WA_UMG_S20_STR-MBRSH sy-vline 
WA_UMG_S20_STR-MATKL sy-vline 
WA_UMG_S20_STR-BISMT sy-vline 
WA_UMG_S20_STR-MEINS sy-vline 
WA_UMG_S20_STR-BSTME sy-vline 
WA_UMG_S20_STR-ZEINR sy-vline 
WA_UMG_S20_STR-ZEIAR sy-vline 
WA_UMG_S20_STR-ZEIVR sy-vline 
WA_UMG_S20_STR-ZEIFO sy-vline 
WA_UMG_S20_STR-AESZN sy-vline 
WA_UMG_S20_STR-BLATT sy-vline 
WA_UMG_S20_STR-BLANZ sy-vline 
WA_UMG_S20_STR-FERTH sy-vline 
WA_UMG_S20_STR-FORMT sy-vline 
WA_UMG_S20_STR-GROES sy-vline 
WA_UMG_S20_STR-WRKST sy-vline 
WA_UMG_S20_STR-NORMT sy-vline 
WA_UMG_S20_STR-LABOR sy-vline 
WA_UMG_S20_STR-EKWSL sy-vline 
WA_UMG_S20_STR-BRGEW sy-vline 
WA_UMG_S20_STR-NTGEW sy-vline 
WA_UMG_S20_STR-GEWEI sy-vline 
WA_UMG_S20_STR-VOLUM sy-vline 
WA_UMG_S20_STR-VOLEH sy-vline 
WA_UMG_S20_STR-BEHVO sy-vline 
WA_UMG_S20_STR-RAUBE sy-vline 
WA_UMG_S20_STR-TEMPB sy-vline 
WA_UMG_S20_STR-DISST sy-vline 
WA_UMG_S20_STR-TRAGR sy-vline 
WA_UMG_S20_STR-STOFF sy-vline 
WA_UMG_S20_STR-SPART sy-vline 
WA_UMG_S20_STR-KUNNR sy-vline 
WA_UMG_S20_STR-EANNR sy-vline 
WA_UMG_S20_STR-WESCH sy-vline 
WA_UMG_S20_STR-BWVOR sy-vline 
WA_UMG_S20_STR-BWSCL sy-vline 
WA_UMG_S20_STR-SAISO sy-vline 
WA_UMG_S20_STR-ETIAR sy-vline 
WA_UMG_S20_STR-ETIFO sy-vline 
WA_UMG_S20_STR-ENTAR sy-vline 
WA_UMG_S20_STR-EAN11 sy-vline 
WA_UMG_S20_STR-NUMTP sy-vline 
WA_UMG_S20_STR-LAENG sy-vline 
WA_UMG_S20_STR-BREIT sy-vline 
WA_UMG_S20_STR-HOEHE sy-vline 
WA_UMG_S20_STR-MEABM sy-vline 
WA_UMG_S20_STR-PRDHA sy-vline 
WA_UMG_S20_STR-AEKLK sy-vline 
WA_UMG_S20_STR-CADKZ sy-vline 
WA_UMG_S20_STR-QMPUR sy-vline 
WA_UMG_S20_STR-ERGEW sy-vline 
WA_UMG_S20_STR-ERGEI sy-vline 
WA_UMG_S20_STR-ERVOL sy-vline 
WA_UMG_S20_STR-ERVOE sy-vline 
WA_UMG_S20_STR-GEWTO sy-vline 
WA_UMG_S20_STR-VOLTO sy-vline 
WA_UMG_S20_STR-VABME sy-vline 
WA_UMG_S20_STR-KZREV sy-vline 
WA_UMG_S20_STR-KZKFG sy-vline 
WA_UMG_S20_STR-XCHPF sy-vline 
WA_UMG_S20_STR-VHART sy-vline 
WA_UMG_S20_STR-FUELG sy-vline 
WA_UMG_S20_STR-STFAK sy-vline 
WA_UMG_S20_STR-MAGRV sy-vline 
WA_UMG_S20_STR-BEGRU sy-vline 
WA_UMG_S20_STR-DATAB sy-vline 
WA_UMG_S20_STR-LIQDT sy-vline 
WA_UMG_S20_STR-SAISJ sy-vline 
WA_UMG_S20_STR-PLGTP sy-vline 
WA_UMG_S20_STR-MLGUT sy-vline 
WA_UMG_S20_STR-EXTWG sy-vline 
WA_UMG_S20_STR-SATNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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