ABAP Select data from SAP table ERRMSG_TAB_MSD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERRMSG_TAB_MSD
*  INTO TABLE @DATA(IT_ERRMSG_TAB_MSD2).
*--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_ERRMSG_TAB_MSD INDEX 1 INTO DATA(WA_ERRMSG_TAB_MSD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERRMSG_TAB_MSD>-PROD_COUNT = 1.
<ERRMSG_TAB_MSD>-HIERARCHLEVL = 1.
<ERRMSG_TAB_MSD>-DRERZ = 1.
<ERRMSG_TAB_MSD>-PVA = 1.
<ERRMSG_TAB_MSD>-ERSCHDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERRMSG_TAB_MSD-VAUSGB, sy-vline,
  WA_ERRMSG_TAB_MSD-PART_COUNT, sy-vline,
  WA_ERRMSG_TAB_MSD-DRKEI, sy-vline,
  WA_ERRMSG_TAB_MSD-TRANC, sy-vline,
  WA_ERRMSG_TAB_MSD-MATNR, sy-vline,
  WA_ERRMSG_TAB_MSD-MSGID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERRMSG_TAB_MSD 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_ERRMSG_TAB_MSD 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_ERRMSG_TAB_MSD INTO WA_ERRMSG_TAB_MSD.


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

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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ERRMSG_TAB_MSD-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERRMSG_TAB_MSD-MATNR.
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_ERRMSG_TAB_MSD_STR, 
PROD_COUNT TYPE STRING,
HIERARCHLEVL TYPE STRING,
DRERZ TYPE STRING,
PVA TYPE STRING,
ERSCHDAT TYPE STRING,
VAUSGB TYPE STRING,
PART_COUNT TYPE STRING,
DRKEI TYPE STRING,
TRANC TYPE STRING,
MATNR TYPE STRING,
MSGID TYPE STRING,
MSGTY TYPE STRING,
MSGNO TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERRMSG_TAB_MSD_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_ERRMSG_TAB_MSD_STR-PROD_COUNT sy-vline 
WA_ERRMSG_TAB_MSD_STR-HIERARCHLEVL sy-vline 
WA_ERRMSG_TAB_MSD_STR-DRERZ sy-vline 
WA_ERRMSG_TAB_MSD_STR-PVA sy-vline 
WA_ERRMSG_TAB_MSD_STR-ERSCHDAT sy-vline 
WA_ERRMSG_TAB_MSD_STR-VAUSGB sy-vline 
WA_ERRMSG_TAB_MSD_STR-PART_COUNT sy-vline 
WA_ERRMSG_TAB_MSD_STR-DRKEI sy-vline 
WA_ERRMSG_TAB_MSD_STR-TRANC sy-vline 
WA_ERRMSG_TAB_MSD_STR-MATNR sy-vline 
WA_ERRMSG_TAB_MSD_STR-MSGID sy-vline 
WA_ERRMSG_TAB_MSD_STR-MSGTY sy-vline 
WA_ERRMSG_TAB_MSD_STR-MSGNO sy-vline 
WA_ERRMSG_TAB_MSD_STR-MSGV1 sy-vline 
WA_ERRMSG_TAB_MSD_STR-MSGV2 sy-vline 
WA_ERRMSG_TAB_MSD_STR-MSGV3 sy-vline 
WA_ERRMSG_TAB_MSD_STR-MSGV4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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