ABAP Select data from SAP table MERE_OUTTAB_ME2O into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MERE_OUTTAB_ME2O 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 MERE_OUTTAB_ME2O. 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 MERE_OUTTAB_ME2O 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_MERE_OUTTAB_ME2O TYPE STANDARD TABLE OF MERE_OUTTAB_ME2O,
      WA_MERE_OUTTAB_ME2O TYPE MERE_OUTTAB_ME2O,
      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: <MERE_OUTTAB_ME2O> TYPE MERE_OUTTAB_ME2O.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MERE_OUTTAB_ME2O.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MERE_OUTTAB_ME2O
  INTO TABLE IT_MERE_OUTTAB_ME2O.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MERE_OUTTAB_ME2O
*  INTO TABLE @DATA(IT_MERE_OUTTAB_ME2O2).
*--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_MERE_OUTTAB_ME2O INDEX 1 INTO DATA(WA_MERE_OUTTAB_ME2O2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MERE_OUTTAB_ME2O ASSIGNING <MERE_OUTTAB_ME2O>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MERE_OUTTAB_ME2O>-SELKZ = 1.
<MERE_OUTTAB_ME2O>-LIFNR = 1.
<MERE_OUTTAB_ME2O>-MATNR = 1.
<MERE_OUTTAB_ME2O>-MAKTX = 1.
<MERE_OUTTAB_ME2O>-WERKS = 1.

ENDLOOP.

LOOP AT IT_MERE_OUTTAB_ME2O INTO WA_MERE_OUTTAB_ME2O.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MERE_OUTTAB_ME2O-ETYPE, sy-vline,
  WA_MERE_OUTTAB_ME2O-ETTXT, sy-vline,
  WA_MERE_OUTTAB_ME2O-CHARG, sy-vline,
  WA_MERE_OUTTAB_ME2O-ICON_EXP, sy-vline,
  WA_MERE_OUTTAB_ME2O-MENGE, sy-vline,
  WA_MERE_OUTTAB_ME2O-LAGME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MERE_OUTTAB_ME2O 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_MERE_OUTTAB_ME2O 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_MERE_OUTTAB_ME2O INTO WA_MERE_OUTTAB_ME2O.


*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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MERE_OUTTAB_ME2O-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MERE_OUTTAB_ME2O-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MERE_OUTTAB_ME2O-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MERE_OUTTAB_ME2O-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LAGME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MERE_OUTTAB_ME2O-LAGME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MERE_OUTTAB_ME2O-LAGME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ERFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MERE_OUTTAB_ME2O-ERFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MERE_OUTTAB_ME2O-ERFME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MERE_OUTTAB_ME2O-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MERE_OUTTAB_ME2O-EBELN.
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_MERE_OUTTAB_ME2O_STR, 
SELKZ TYPE STRING,
LIFNR TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
WERKS TYPE STRING,
ETYPE TYPE STRING,
ETTXT TYPE STRING,
CHARG TYPE STRING,
ICON_EXP TYPE STRING,
MENGE TYPE STRING,
LAGME TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
ICON_SIGN TYPE STRING,
EBDAT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
EINDT TYPE STRING,
NAME1 TYPE STRING,
ORT01 TYPE STRING,
LGORT TYPE STRING,
VSTEL TYPE STRING,
LADGR TYPE STRING,
SERNP TYPE STRING,
LBLFA TYPE STRING,
BSTYP TYPE STRING,
ESTKZ TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
XDETAIL TYPE STRING,
KOPKZ TYPE STRING,
AZPOS TYPE STRING,
BDTER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MERE_OUTTAB_ME2O_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_MERE_OUTTAB_ME2O_STR-SELKZ sy-vline 
WA_MERE_OUTTAB_ME2O_STR-LIFNR sy-vline 
WA_MERE_OUTTAB_ME2O_STR-MATNR sy-vline 
WA_MERE_OUTTAB_ME2O_STR-MAKTX sy-vline 
WA_MERE_OUTTAB_ME2O_STR-WERKS sy-vline 
WA_MERE_OUTTAB_ME2O_STR-ETYPE sy-vline 
WA_MERE_OUTTAB_ME2O_STR-ETTXT sy-vline 
WA_MERE_OUTTAB_ME2O_STR-CHARG sy-vline 
WA_MERE_OUTTAB_ME2O_STR-ICON_EXP sy-vline 
WA_MERE_OUTTAB_ME2O_STR-MENGE sy-vline 
WA_MERE_OUTTAB_ME2O_STR-LAGME sy-vline 
WA_MERE_OUTTAB_ME2O_STR-ERFMG sy-vline 
WA_MERE_OUTTAB_ME2O_STR-ERFME sy-vline 
WA_MERE_OUTTAB_ME2O_STR-ICON_SIGN sy-vline 
WA_MERE_OUTTAB_ME2O_STR-EBDAT sy-vline 
WA_MERE_OUTTAB_ME2O_STR-EBELN sy-vline 
WA_MERE_OUTTAB_ME2O_STR-EBELP sy-vline 
WA_MERE_OUTTAB_ME2O_STR-EINDT sy-vline 
WA_MERE_OUTTAB_ME2O_STR-NAME1 sy-vline 
WA_MERE_OUTTAB_ME2O_STR-ORT01 sy-vline 
WA_MERE_OUTTAB_ME2O_STR-LGORT sy-vline 
WA_MERE_OUTTAB_ME2O_STR-VSTEL sy-vline 
WA_MERE_OUTTAB_ME2O_STR-LADGR sy-vline 
WA_MERE_OUTTAB_ME2O_STR-SERNP sy-vline 
WA_MERE_OUTTAB_ME2O_STR-LBLFA sy-vline 
WA_MERE_OUTTAB_ME2O_STR-BSTYP sy-vline 
WA_MERE_OUTTAB_ME2O_STR-ESTKZ sy-vline 
WA_MERE_OUTTAB_ME2O_STR-AUFPL sy-vline 
WA_MERE_OUTTAB_ME2O_STR-APLZL sy-vline 
WA_MERE_OUTTAB_ME2O_STR-XDETAIL sy-vline 
WA_MERE_OUTTAB_ME2O_STR-KOPKZ sy-vline 
WA_MERE_OUTTAB_ME2O_STR-AZPOS sy-vline 
WA_MERE_OUTTAB_ME2O_STR-BDTER sy-vline      INTO ld_text SEPARATED BY SPACE.

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