ABAP Select data from SAP table MEOUT_WERE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEOUT_WERE
*  INTO TABLE @DATA(IT_MEOUT_WERE2).
*--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_MEOUT_WERE INDEX 1 INTO DATA(WA_MEOUT_WERE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MEOUT_WERE>-WE = 1.
<MEOUT_WERE>-WS = 1.
<MEOUT_WERE>-AN = 1.
<MEOUT_WERE>-WA = 1.
<MEOUT_WERE>-RE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MEOUT_WERE-FR, sy-vline,
  WA_MEOUT_WERE-LB, sy-vline,
  WA_MEOUT_WERE-FB, sy-vline,
  WA_MEOUT_WERE-AAF, sy-vline,
  WA_MEOUT_WERE-BUFFERED, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_MEOUT_WERE 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_MEOUT_WERE 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_MEOUT_WERE INTO WA_MEOUT_WERE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MEOUT_WERE_STR, 
WE TYPE STRING,
WS TYPE STRING,
AN TYPE STRING,
WA TYPE STRING,
RE TYPE STRING,
FR TYPE STRING,
LB TYPE STRING,
FB TYPE STRING,
AAF TYPE STRING,
BUFFERED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEOUT_WERE_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_MEOUT_WERE_STR-WE sy-vline 
WA_MEOUT_WERE_STR-WS sy-vline 
WA_MEOUT_WERE_STR-AN sy-vline 
WA_MEOUT_WERE_STR-WA sy-vline 
WA_MEOUT_WERE_STR-RE sy-vline 
WA_MEOUT_WERE_STR-FR sy-vline 
WA_MEOUT_WERE_STR-LB sy-vline 
WA_MEOUT_WERE_STR-FB sy-vline 
WA_MEOUT_WERE_STR-AAF sy-vline 
WA_MEOUT_WERE_STR-BUFFERED sy-vline      INTO ld_text SEPARATED BY SPACE.

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