ABAP Select data from SAP table ACE_MESSAGE_HANDLER into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACE_MESSAGE_HANDLER
*  INTO TABLE @DATA(IT_ACE_MESSAGE_HANDLER2).
*--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_ACE_MESSAGE_HANDLER INDEX 1 INTO DATA(WA_ACE_MESSAGE_HANDLER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACE_MESSAGE_HANDLER>-SORTING = 1.
<ACE_MESSAGE_HANDLER>-COMP = 1.
<ACE_MESSAGE_HANDLER>-LOGSYS = 1.
<ACE_MESSAGE_HANDLER>-BUKRS = 1.
<ACE_MESSAGE_HANDLER>-REF_KEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACE_MESSAGE_HANDLER-REF_SUBKEY, sy-vline,
  WA_ACE_MESSAGE_HANDLER-ITEMTYPE, sy-vline,
  WA_ACE_MESSAGE_HANDLER-LDGRP, sy-vline,
  WA_ACE_MESSAGE_HANDLER-RLDNR, sy-vline,
  WA_ACE_MESSAGE_HANDLER-ATTR1, sy-vline,
  WA_ACE_MESSAGE_HANDLER-ATTR2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACE_MESSAGE_HANDLER 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_ACE_MESSAGE_HANDLER 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_ACE_MESSAGE_HANDLER INTO WA_ACE_MESSAGE_HANDLER.


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

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

*Conversion exit ALPHA, internal->external for field RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ACE_MESSAGE_HANDLER-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACE_MESSAGE_HANDLER-RLDNR.
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_ACE_MESSAGE_HANDLER_STR, 
SORTING TYPE STRING,
COMP TYPE STRING,
LOGSYS TYPE STRING,
BUKRS TYPE STRING,
REF_KEY TYPE STRING,
REF_SUBKEY TYPE STRING,
ITEMTYPE TYPE STRING,
LDGRP TYPE STRING,
RLDNR TYPE STRING,
ATTR1 TYPE STRING,
ATTR2 TYPE STRING,
ATTR3 TYPE STRING,
MSGTY TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
MESSAGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACE_MESSAGE_HANDLER_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_ACE_MESSAGE_HANDLER_STR-SORTING sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-COMP sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-LOGSYS sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-BUKRS sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-REF_KEY sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-REF_SUBKEY sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-ITEMTYPE sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-LDGRP sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-RLDNR sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-ATTR1 sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-ATTR2 sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-ATTR3 sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-MSGTY sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-MSGID sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-MSGNO sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-MSGV1 sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-MSGV2 sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-MSGV3 sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-MSGV4 sy-vline 
WA_ACE_MESSAGE_HANDLER_STR-MESSAGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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