ABAP Select data from SAP table MEOUT_THEADTAB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MEOUT_THEADTAB 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_THEADTAB. 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_THEADTAB 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_THEADTAB TYPE STANDARD TABLE OF MEOUT_THEADTAB,
      WA_MEOUT_THEADTAB TYPE MEOUT_THEADTAB,
      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_THEADTAB> TYPE MEOUT_THEADTAB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEOUT_THEADTAB
*  INTO TABLE @DATA(IT_MEOUT_THEADTAB2).
*--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_THEADTAB INDEX 1 INTO DATA(WA_MEOUT_THEADTAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MEOUT_THEADTAB>-TDOBJECT = 1.
<MEOUT_THEADTAB>-TDNAME = 1.
<MEOUT_THEADTAB>-TDID = 1.
<MEOUT_THEADTAB>-TDSPRAS = 1.
<MEOUT_THEADTAB>-TDTITLE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MEOUT_THEADTAB-TDFORM, sy-vline,
  WA_MEOUT_THEADTAB-TDSTYLE, sy-vline,
  WA_MEOUT_THEADTAB-TDVERSION, sy-vline,
  WA_MEOUT_THEADTAB-TDFUSER, sy-vline,
  WA_MEOUT_THEADTAB-TDFRELES, sy-vline,
  WA_MEOUT_THEADTAB-TDFDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MEOUT_THEADTAB 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_THEADTAB 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_THEADTAB INTO WA_MEOUT_THEADTAB.


*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 TDSPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MEOUT_THEADTAB-TDSPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEOUT_THEADTAB-TDSPRAS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEOUT_THEADTAB-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEOUT_THEADTAB-LOGSYS.
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_MEOUT_THEADTAB_STR, 
TDOBJECT TYPE STRING,
TDNAME TYPE STRING,
TDID TYPE STRING,
TDSPRAS TYPE STRING,
TDTITLE TYPE STRING,
TDFORM TYPE STRING,
TDSTYLE TYPE STRING,
TDVERSION TYPE STRING,
TDFUSER TYPE STRING,
TDFRELES TYPE STRING,
TDFDATE TYPE STRING,
TDFTIME TYPE STRING,
TDLUSER TYPE STRING,
TDLRELES TYPE STRING,
TDLDATE TYPE STRING,
TDLTIME TYPE STRING,
TDLINESIZE TYPE STRING,
TDTXTLINES TYPE STRING,
TDHYPHENAT TYPE STRING,
TDOSPRAS TYPE STRING,
TDTRANSTAT TYPE STRING,
TDMACODE1 TYPE STRING,
TDMACODE2 TYPE STRING,
TDREFOBJ TYPE STRING,
TDREFNAME TYPE STRING,
TDREFID TYPE STRING,
TDTEXTTYPE TYPE STRING,
TDCOMPRESS TYPE STRING,
MANDT TYPE STRING,
TDOCLASS TYPE STRING,
LOGSYS TYPE STRING,
NEU TYPE STRING,
FIXIE TYPE STRING,
SELKZ TYPE STRING,
KOOBJECT TYPE STRING,
KOID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEOUT_THEADTAB_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_THEADTAB_STR-TDOBJECT sy-vline 
WA_MEOUT_THEADTAB_STR-TDNAME sy-vline 
WA_MEOUT_THEADTAB_STR-TDID sy-vline 
WA_MEOUT_THEADTAB_STR-TDSPRAS sy-vline 
WA_MEOUT_THEADTAB_STR-TDTITLE sy-vline 
WA_MEOUT_THEADTAB_STR-TDFORM sy-vline 
WA_MEOUT_THEADTAB_STR-TDSTYLE sy-vline 
WA_MEOUT_THEADTAB_STR-TDVERSION sy-vline 
WA_MEOUT_THEADTAB_STR-TDFUSER sy-vline 
WA_MEOUT_THEADTAB_STR-TDFRELES sy-vline 
WA_MEOUT_THEADTAB_STR-TDFDATE sy-vline 
WA_MEOUT_THEADTAB_STR-TDFTIME sy-vline 
WA_MEOUT_THEADTAB_STR-TDLUSER sy-vline 
WA_MEOUT_THEADTAB_STR-TDLRELES sy-vline 
WA_MEOUT_THEADTAB_STR-TDLDATE sy-vline 
WA_MEOUT_THEADTAB_STR-TDLTIME sy-vline 
WA_MEOUT_THEADTAB_STR-TDLINESIZE sy-vline 
WA_MEOUT_THEADTAB_STR-TDTXTLINES sy-vline 
WA_MEOUT_THEADTAB_STR-TDHYPHENAT sy-vline 
WA_MEOUT_THEADTAB_STR-TDOSPRAS sy-vline 
WA_MEOUT_THEADTAB_STR-TDTRANSTAT sy-vline 
WA_MEOUT_THEADTAB_STR-TDMACODE1 sy-vline 
WA_MEOUT_THEADTAB_STR-TDMACODE2 sy-vline 
WA_MEOUT_THEADTAB_STR-TDREFOBJ sy-vline 
WA_MEOUT_THEADTAB_STR-TDREFNAME sy-vline 
WA_MEOUT_THEADTAB_STR-TDREFID sy-vline 
WA_MEOUT_THEADTAB_STR-TDTEXTTYPE sy-vline 
WA_MEOUT_THEADTAB_STR-TDCOMPRESS sy-vline 
WA_MEOUT_THEADTAB_STR-MANDT sy-vline 
WA_MEOUT_THEADTAB_STR-TDOCLASS sy-vline 
WA_MEOUT_THEADTAB_STR-LOGSYS sy-vline 
WA_MEOUT_THEADTAB_STR-NEU sy-vline 
WA_MEOUT_THEADTAB_STR-FIXIE sy-vline 
WA_MEOUT_THEADTAB_STR-SELKZ sy-vline 
WA_MEOUT_THEADTAB_STR-KOOBJECT sy-vline 
WA_MEOUT_THEADTAB_STR-KOID sy-vline      INTO ld_text SEPARATED BY SPACE.

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