ABAP Select data from SAP table ILCMSGNTRGR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ILCMSGNTRGR
*  INTO TABLE @DATA(IT_ILCMSGNTRGR2).
*--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_ILCMSGNTRGR INDEX 1 INTO DATA(WA_ILCMSGNTRGR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ILCMSGNTRGR>-MANDT = 1.
<ILCMSGNTRGR>-LGLCNTNTMSIGNATUREGROUPUUID = 1.
<ILCMSGNTRGR>-LGLCNTNTMSIGNATUREGROUP = 1.
<ILCMSGNTRGR>-LGLCNTNTMSGNTRGRPLINKDOBJ = 1.
<ILCMSGNTRGR>-LEGALTRANSACTIONUUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ILCMSGNTRGR-LGLCNTNTMCREATEDUTCDATETIME, sy-vline,
  WA_ILCMSGNTRGR-LGLCNTNTMCREATEDBYUSER, sy-vline,
  WA_ILCMSGNTRGR-LGLCNTNTMCHANGEDUTCDATETIME, sy-vline,
  WA_ILCMSGNTRGR-LGLCNTNTMCHANGEDBYUSER, sy-vline,
  WA_ILCMSGNTRGR-LGLCNTNTMSIGNATUREGROUPSTATUS, sy-vline,
  WA_ILCMSGNTRGR-LGLCNTNTMCMPLTDUTCDATETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ILCMSGNTRGR 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_ILCMSGNTRGR 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_ILCMSGNTRGR INTO WA_ILCMSGNTRGR.


*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 LGLCNTNTMSGNTRCERTDOCID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ILCMSGNTRGR-LGLCNTNTMSGNTRCERTDOCID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ILCMSGNTRGR-LGLCNTNTMSGNTRCERTDOCID.
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_ILCMSGNTRGR_STR, 
MANDT TYPE STRING,
LGLCNTNTMSIGNATUREGROUPUUID TYPE STRING,
LGLCNTNTMSIGNATUREGROUP TYPE STRING,
LGLCNTNTMSGNTRGRPLINKDOBJ TYPE STRING,
LEGALTRANSACTIONUUID TYPE STRING,
LGLCNTNTMCREATEDUTCDATETIME TYPE STRING,
LGLCNTNTMCREATEDBYUSER TYPE STRING,
LGLCNTNTMCHANGEDUTCDATETIME TYPE STRING,
LGLCNTNTMCHANGEDBYUSER TYPE STRING,
LGLCNTNTMSIGNATUREGROUPSTATUS TYPE STRING,
LGLCNTNTMCMPLTDUTCDATETIME TYPE STRING,
LGLCNTNTMSGNTRCERTDOCID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ILCMSGNTRGR_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_ILCMSGNTRGR_STR-MANDT sy-vline 
WA_ILCMSGNTRGR_STR-LGLCNTNTMSIGNATUREGROUPUUID sy-vline 
WA_ILCMSGNTRGR_STR-LGLCNTNTMSIGNATUREGROUP sy-vline 
WA_ILCMSGNTRGR_STR-LGLCNTNTMSGNTRGRPLINKDOBJ sy-vline 
WA_ILCMSGNTRGR_STR-LEGALTRANSACTIONUUID sy-vline 
WA_ILCMSGNTRGR_STR-LGLCNTNTMCREATEDUTCDATETIME sy-vline 
WA_ILCMSGNTRGR_STR-LGLCNTNTMCREATEDBYUSER sy-vline 
WA_ILCMSGNTRGR_STR-LGLCNTNTMCHANGEDUTCDATETIME sy-vline 
WA_ILCMSGNTRGR_STR-LGLCNTNTMCHANGEDBYUSER sy-vline 
WA_ILCMSGNTRGR_STR-LGLCNTNTMSIGNATUREGROUPSTATUS sy-vline 
WA_ILCMSGNTRGR_STR-LGLCNTNTMCMPLTDUTCDATETIME sy-vline 
WA_ILCMSGNTRGR_STR-LGLCNTNTMSGNTRCERTDOCID sy-vline      INTO ld_text SEPARATED BY SPACE.

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