ABAP Select data from SAP table MEDATA_EXAMPLE_1_RETURN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MEDATA_EXAMPLE_1_RETURN 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 MEDATA_EXAMPLE_1_RETURN. 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 MEDATA_EXAMPLE_1_RETURN 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_MEDATA_EXAMPLE_1_RETURN TYPE STANDARD TABLE OF MEDATA_EXAMPLE_1_RETURN,
      WA_MEDATA_EXAMPLE_1_RETURN TYPE MEDATA_EXAMPLE_1_RETURN,
      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: <MEDATA_EXAMPLE_1_RETURN> TYPE MEDATA_EXAMPLE_1_RETURN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MEDATA_EXAMPLE_1_RETURN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MEDATA_EXAMPLE_1_RETURN
  INTO TABLE IT_MEDATA_EXAMPLE_1_RETURN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEDATA_EXAMPLE_1_RETURN
*  INTO TABLE @DATA(IT_MEDATA_EXAMPLE_1_RETURN2).
*--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_MEDATA_EXAMPLE_1_RETURN INDEX 1 INTO DATA(WA_MEDATA_EXAMPLE_1_RETURN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MEDATA_EXAMPLE_1_RETURN ASSIGNING <MEDATA_EXAMPLE_1_RETURN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MEDATA_EXAMPLE_1_RETURN>-MANDT = 1.
<MEDATA_EXAMPLE_1_RETURN>-BNAME = 1.
<MEDATA_EXAMPLE_1_RETURN>-NAME1 = 1.
<MEDATA_EXAMPLE_1_RETURN>-NAME2 = 1.
<MEDATA_EXAMPLE_1_RETURN>-NAME3 = 1.

ENDLOOP.

LOOP AT IT_MEDATA_EXAMPLE_1_RETURN INTO WA_MEDATA_EXAMPLE_1_RETURN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MEDATA_EXAMPLE_1_RETURN-NAME4, sy-vline,
  WA_MEDATA_EXAMPLE_1_RETURN-SALUT, sy-vline,
  WA_MEDATA_EXAMPLE_1_RETURN-ABTLG, sy-vline,
  WA_MEDATA_EXAMPLE_1_RETURN-KOSTL, sy-vline,
  WA_MEDATA_EXAMPLE_1_RETURN-BUINR, sy-vline,
  WA_MEDATA_EXAMPLE_1_RETURN-ROONR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MEDATA_EXAMPLE_1_RETURN 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_MEDATA_EXAMPLE_1_RETURN 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_MEDATA_EXAMPLE_1_RETURN INTO WA_MEDATA_EXAMPLE_1_RETURN.


*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_MEDATA_EXAMPLE_1_RETURN-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEDATA_EXAMPLE_1_RETURN-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field TEST12
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MEDATA_EXAMPLE_1_RETURN-TEST12
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEDATA_EXAMPLE_1_RETURN-TEST12.
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_MEDATA_EXAMPLE_1_RETURN_STR, 
MANDT TYPE STRING,
BNAME TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
SALUT TYPE STRING,
ABTLG TYPE STRING,
KOSTL TYPE STRING,
BUINR TYPE STRING,
ROONR TYPE STRING,
STRAS TYPE STRING,
PFACH TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
REGIO TYPE STRING,
LAND1 TYPE STRING,
SPRAS TYPE STRING,
TELPR TYPE STRING,
TELNR TYPE STRING,
TEL01 TYPE STRING,
TEL02 TYPE STRING,
TELX1 TYPE STRING,
TELFX TYPE STRING,
TELTX TYPE STRING,
ORT02 TYPE STRING,
PSTL2 TYPE STRING,
TZONE TYPE STRING,
COMMENTS TYPE STRING,
TEST12 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEDATA_EXAMPLE_1_RETURN_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_MEDATA_EXAMPLE_1_RETURN_STR-MANDT sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-BNAME sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-NAME1 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-NAME2 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-NAME3 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-NAME4 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-SALUT sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-ABTLG sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-KOSTL sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-BUINR sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-ROONR sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-STRAS sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-PFACH sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-PSTLZ sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-ORT01 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-REGIO sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-LAND1 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-SPRAS sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-TELPR sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-TELNR sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-TEL01 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-TEL02 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-TELX1 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-TELFX sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-TELTX sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-ORT02 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-PSTL2 sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-TZONE sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-COMMENTS sy-vline 
WA_MEDATA_EXAMPLE_1_RETURN_STR-TEST12 sy-vline      INTO ld_text SEPARATED BY SPACE.

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