ABAP Select data from SAP table COACTMSG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COACTMSG
*  INTO TABLE @DATA(IT_COACTMSG2).
*--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_COACTMSG INDEX 1 INTO DATA(WA_COACTMSG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COACTMSG>-ARBGB = 1.
<COACTMSG>-MSGTY = 1.
<COACTMSG>-MSGNR = 1.
<COACTMSG>-MSGV1 = 1.
<COACTMSG>-MSGV2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COACTMSG-MSGV3, sy-vline,
  WA_COACTMSG-MSGV4, sy-vline,
  WA_COACTMSG-SPRAS, sy-vline,
  WA_COACTMSG-OBJKZ, sy-vline,
  WA_COACTMSG-OBJECT, sy-vline,
  WA_COACTMSG-SUBOBJ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COACTMSG 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_COACTMSG 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_COACTMSG INTO WA_COACTMSG.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_COACTMSG-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COACTMSG-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COACTMSG-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COACTMSG-AUFNR.
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_COACTMSG_STR, 
ARBGB TYPE STRING,
MSGTY TYPE STRING,
MSGNR TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
SPRAS TYPE STRING,
OBJKZ TYPE STRING,
OBJECT TYPE STRING,
SUBOBJ TYPE STRING,
DUPCOUNT TYPE STRING,
VBFIX TYPE STRING,
VEBE TYPE STRING,
VBSPZ TYPE STRING,
GRU1 TYPE STRING,
GRU2 TYPE STRING,
KOKRS TYPE STRING,
WERKS TYPE STRING,
LOGSYS TYPE STRING,
PHASE TYPE STRING,
AUFNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COACTMSG_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_COACTMSG_STR-ARBGB sy-vline 
WA_COACTMSG_STR-MSGTY sy-vline 
WA_COACTMSG_STR-MSGNR sy-vline 
WA_COACTMSG_STR-MSGV1 sy-vline 
WA_COACTMSG_STR-MSGV2 sy-vline 
WA_COACTMSG_STR-MSGV3 sy-vline 
WA_COACTMSG_STR-MSGV4 sy-vline 
WA_COACTMSG_STR-SPRAS sy-vline 
WA_COACTMSG_STR-OBJKZ sy-vline 
WA_COACTMSG_STR-OBJECT sy-vline 
WA_COACTMSG_STR-SUBOBJ sy-vline 
WA_COACTMSG_STR-DUPCOUNT sy-vline 
WA_COACTMSG_STR-VBFIX sy-vline 
WA_COACTMSG_STR-VEBE sy-vline 
WA_COACTMSG_STR-VBSPZ sy-vline 
WA_COACTMSG_STR-GRU1 sy-vline 
WA_COACTMSG_STR-GRU2 sy-vline 
WA_COACTMSG_STR-KOKRS sy-vline 
WA_COACTMSG_STR-WERKS sy-vline 
WA_COACTMSG_STR-LOGSYS sy-vline 
WA_COACTMSG_STR-PHASE sy-vline 
WA_COACTMSG_STR-AUFNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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