ABAP Select data from SAP table SOMG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SOMG
*  INTO TABLE @DATA(IT_SOMG2).
*--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_SOMG INDEX 1 INTO DATA(WA_SOMG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SOMG>-MANDT = 1.
<SOMG>-OBJTP = 1.
<SOMG>-OBJYR = 1.
<SOMG>-OBJNO = 1.
<SOMG>-RCP_ID_TP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SOMG-RCP_ID_YR, sy-vline,
  WA_SOMG-RCP_ID_NO, sy-vline,
  WA_SOMG-RCP_SND_TP, sy-vline,
  WA_SOMG-RCP_SEQ_NO, sy-vline,
  WA_SOMG-FOLTP, sy-vline,
  WA_SOMG-FOLYR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SOMG 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_SOMG 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_SOMG INTO WA_SOMG.


*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_SOMG_STR, 
MANDT TYPE STRING,
OBJTP TYPE STRING,
OBJYR TYPE STRING,
OBJNO TYPE STRING,
RCP_ID_TP TYPE STRING,
RCP_ID_YR TYPE STRING,
RCP_ID_NO TYPE STRING,
RCP_SND_TP TYPE STRING,
RCP_SEQ_NO TYPE STRING,
FOLTP TYPE STRING,
FOLYR TYPE STRING,
FOLNO TYPE STRING,
DOCTP TYPE STRING,
DOCYR TYPE STRING,
DOCNO TYPE STRING,
FORTP TYPE STRING,
FORYR TYPE STRING,
FORNO TYPE STRING,
USED_BY TYPE STRING,
GEN_NOTTP TYPE STRING,
GEN_NOTYR TYPE STRING,
GEN_NOTNO TYPE STRING,
OUTBOX TYPE STRING,
ARC_FOLTP TYPE STRING,
ARC_FOLYR TYPE STRING,
ARC_FOLNO TYPE STRING,
ASYNCHRON TYPE STRING,
SENDER TYPE STRING,
NOTTP TYPE STRING,
NOTYR TYPE STRING,
NOTNO TYPE STRING,
REPLY_TO TYPE STRING,
SNDEX TYPE STRING,
SNDCP TYPE STRING,
SNDBC TYPE STRING,
FORFB TYPE STRING,
PRIFB TYPE STRING,
SNDPRI TYPE STRING,
ACALL TYPE STRING,
ACONE TYPE STRING,
OBJRR TYPE STRING,
MAILSTATUS TYPE STRING,
DELIVER TYPE STRING,
NOT_DELI TYPE STRING,
READ_NOTIF TYPE STRING,
RESEND TYPE STRING,
OBJRN TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SOMG_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_SOMG_STR-MANDT sy-vline 
WA_SOMG_STR-OBJTP sy-vline 
WA_SOMG_STR-OBJYR sy-vline 
WA_SOMG_STR-OBJNO sy-vline 
WA_SOMG_STR-RCP_ID_TP sy-vline 
WA_SOMG_STR-RCP_ID_YR sy-vline 
WA_SOMG_STR-RCP_ID_NO sy-vline 
WA_SOMG_STR-RCP_SND_TP sy-vline 
WA_SOMG_STR-RCP_SEQ_NO sy-vline 
WA_SOMG_STR-FOLTP sy-vline 
WA_SOMG_STR-FOLYR sy-vline 
WA_SOMG_STR-FOLNO sy-vline 
WA_SOMG_STR-DOCTP sy-vline 
WA_SOMG_STR-DOCYR sy-vline 
WA_SOMG_STR-DOCNO sy-vline 
WA_SOMG_STR-FORTP sy-vline 
WA_SOMG_STR-FORYR sy-vline 
WA_SOMG_STR-FORNO sy-vline 
WA_SOMG_STR-USED_BY sy-vline 
WA_SOMG_STR-GEN_NOTTP sy-vline 
WA_SOMG_STR-GEN_NOTYR sy-vline 
WA_SOMG_STR-GEN_NOTNO sy-vline 
WA_SOMG_STR-OUTBOX sy-vline 
WA_SOMG_STR-ARC_FOLTP sy-vline 
WA_SOMG_STR-ARC_FOLYR sy-vline 
WA_SOMG_STR-ARC_FOLNO sy-vline 
WA_SOMG_STR-ASYNCHRON sy-vline 
WA_SOMG_STR-SENDER sy-vline 
WA_SOMG_STR-NOTTP sy-vline 
WA_SOMG_STR-NOTYR sy-vline 
WA_SOMG_STR-NOTNO sy-vline 
WA_SOMG_STR-REPLY_TO sy-vline 
WA_SOMG_STR-SNDEX sy-vline 
WA_SOMG_STR-SNDCP sy-vline 
WA_SOMG_STR-SNDBC sy-vline 
WA_SOMG_STR-FORFB sy-vline 
WA_SOMG_STR-PRIFB sy-vline 
WA_SOMG_STR-SNDPRI sy-vline 
WA_SOMG_STR-ACALL sy-vline 
WA_SOMG_STR-ACONE sy-vline 
WA_SOMG_STR-OBJRR sy-vline 
WA_SOMG_STR-MAILSTATUS sy-vline 
WA_SOMG_STR-DELIVER sy-vline 
WA_SOMG_STR-NOT_DELI sy-vline 
WA_SOMG_STR-READ_NOTIF sy-vline 
WA_SOMG_STR-RESEND sy-vline 
WA_SOMG_STR-OBJRN sy-vline 
WA_SOMG_STR-MSGID sy-vline 
WA_SOMG_STR-MSGNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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