ABAP Select data from SAP table MOD0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MOD0 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 MOD0. 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 MOD0 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_MOD0 TYPE STANDARD TABLE OF MOD0,
      WA_MOD0 TYPE MOD0,
      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: <MOD0> TYPE MOD0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MOD0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MOD0
  INTO TABLE IT_MOD0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MOD0
*  INTO TABLE @DATA(IT_MOD02).
*--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_MOD0 INDEX 1 INTO DATA(WA_MOD02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MOD0 ASSIGNING <MOD0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MOD0>-NAME = 1.
<MOD0>-EXITNAME = 1.
<MOD0>-DEVCLASS = 1.
<MOD0>-NNAME = 1.
<MOD0>-TYP = 1.

ENDLOOP.

LOOP AT IT_MOD0 INTO WA_MOD0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MOD0-TYPT, sy-vline,
  WA_MOD0-MEMBER, sy-vline,
  WA_MOD0-FUNCNAME, sy-vline,
  WA_MOD0-FUNCTEXT, sy-vline,
  WA_MOD0-CUAPROG, sy-vline,
  WA_MOD0-CUAFUN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MOD0 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_MOD0 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_MOD0 INTO WA_MOD0.


*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 ORGLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MOD0-ORGLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MOD0-ORGLANGU.
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_MOD0_STR, 
NAME TYPE STRING,
EXITNAME TYPE STRING,
DEVCLASS TYPE STRING,
NNAME TYPE STRING,
TYP TYPE STRING,
TYPT TYPE STRING,
MEMBER TYPE STRING,
FUNCNAME TYPE STRING,
FUNCTEXT TYPE STRING,
CUAPROG TYPE STRING,
CUAFUN TYPE STRING,
CUATEXT TYPE STRING,
GDYNPROG TYPE STRING,
GDYNNR TYPE STRING,
BERNAME TYPE STRING,
CDYNPROG TYPE STRING,
CDYNNR TYPE STRING,
STEXT TYPE STRING,
TAB TYPE STRING,
INCLTAB TYPE STRING,
TABTEXT TYPE STRING,
CHECKFUN TYPE STRING,
CHECKFUNT TYPE STRING,
STATUS TYPE STRING,
STATUST TYPE STRING,
UNAM TYPE STRING,
UDAT TYPE STRING,
CNAM TYPE STRING,
CDAT TYPE STRING,
ANAM TYPE STRING,
ADAT TYPE STRING,
FNAM TYPE STRING,
FDAT TYPE STRING,
MODTEXT TYPE STRING,
MEMTEXT TYPE STRING,
FLAG TYPE STRING,
TCODE TYPE STRING,
ORGLANGU TYPE STRING,
TOP_TYPE TYPE STRING,
TOP_PRJCT TYPE STRING,
TOP_EXIT TYPE STRING,
TOP_PRTEXT TYPE STRING,
TOP_EXTEXT TYPE STRING,
TOP_EXSTAT TYPE STRING,
TOP_PRSTAT TYPE STRING,
TOP_OBJECT TYPE STRING,
SOURCE TYPE STRING,
MARK TYPE STRING,
PROGRAM TYPE STRING,
FROM TYPE STRING,
TO TYPE STRING,
MIGRATED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MOD0_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_MOD0_STR-NAME sy-vline 
WA_MOD0_STR-EXITNAME sy-vline 
WA_MOD0_STR-DEVCLASS sy-vline 
WA_MOD0_STR-NNAME sy-vline 
WA_MOD0_STR-TYP sy-vline 
WA_MOD0_STR-TYPT sy-vline 
WA_MOD0_STR-MEMBER sy-vline 
WA_MOD0_STR-FUNCNAME sy-vline 
WA_MOD0_STR-FUNCTEXT sy-vline 
WA_MOD0_STR-CUAPROG sy-vline 
WA_MOD0_STR-CUAFUN sy-vline 
WA_MOD0_STR-CUATEXT sy-vline 
WA_MOD0_STR-GDYNPROG sy-vline 
WA_MOD0_STR-GDYNNR sy-vline 
WA_MOD0_STR-BERNAME sy-vline 
WA_MOD0_STR-CDYNPROG sy-vline 
WA_MOD0_STR-CDYNNR sy-vline 
WA_MOD0_STR-STEXT sy-vline 
WA_MOD0_STR-TAB sy-vline 
WA_MOD0_STR-INCLTAB sy-vline 
WA_MOD0_STR-TABTEXT sy-vline 
WA_MOD0_STR-CHECKFUN sy-vline 
WA_MOD0_STR-CHECKFUNT sy-vline 
WA_MOD0_STR-STATUS sy-vline 
WA_MOD0_STR-STATUST sy-vline 
WA_MOD0_STR-UNAM sy-vline 
WA_MOD0_STR-UDAT sy-vline 
WA_MOD0_STR-CNAM sy-vline 
WA_MOD0_STR-CDAT sy-vline 
WA_MOD0_STR-ANAM sy-vline 
WA_MOD0_STR-ADAT sy-vline 
WA_MOD0_STR-FNAM sy-vline 
WA_MOD0_STR-FDAT sy-vline 
WA_MOD0_STR-MODTEXT sy-vline 
WA_MOD0_STR-MEMTEXT sy-vline 
WA_MOD0_STR-FLAG sy-vline 
WA_MOD0_STR-TCODE sy-vline 
WA_MOD0_STR-ORGLANGU sy-vline 
WA_MOD0_STR-TOP_TYPE sy-vline 
WA_MOD0_STR-TOP_PRJCT sy-vline 
WA_MOD0_STR-TOP_EXIT sy-vline 
WA_MOD0_STR-TOP_PRTEXT sy-vline 
WA_MOD0_STR-TOP_EXTEXT sy-vline 
WA_MOD0_STR-TOP_EXSTAT sy-vline 
WA_MOD0_STR-TOP_PRSTAT sy-vline 
WA_MOD0_STR-TOP_OBJECT sy-vline 
WA_MOD0_STR-SOURCE sy-vline 
WA_MOD0_STR-MARK sy-vline 
WA_MOD0_STR-PROGRAM sy-vline 
WA_MOD0_STR-FROM sy-vline 
WA_MOD0_STR-TO sy-vline 
WA_MOD0_STR-MIGRATED sy-vline      INTO ld_text SEPARATED BY SPACE.

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