ABAP Select data from SAP table CMACBPSTUPDT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMACBPSTUPDT
*  INTO TABLE @DATA(IT_CMACBPSTUPDT2).
*--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_CMACBPSTUPDT INDEX 1 INTO DATA(WA_CMACBPSTUPDT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMACBPSTUPDT>-CLIENT = 1.
<CMACBPSTUPDT>-PARTNER = 1.
<CMACBPSTUPDT>-STUDENT12 = 1.
<CMACBPSTUPDT>-MATRIKEL = 1.
<CMACBPSTUPDT>-STOBJID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMACBPSTUPDT-AKTDB, sy-vline,
  WA_CMACBPSTUPDT-AKTYP, sy-vline,
  WA_CMACBPSTUPDT-XCHNG, sy-vline,
  WA_CMACBPSTUPDT-NRRNG, sy-vline,
  WA_CMACBPSTUPDT-XNREX, sy-vline,
  WA_CMACBPSTUPDT-VALDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMACBPSTUPDT 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_CMACBPSTUPDT 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_CMACBPSTUPDT INTO WA_CMACBPSTUPDT.


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

*Conversion exit PIQST, internal->external for field STUDENT12
CALL FUNCTION 'CONVERSION_EXIT_PIQST_OUTPUT'
  EXPORTING
    input =                      WA_CMACBPSTUPDT-STUDENT12
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMACBPSTUPDT-STUDENT12.
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_CMACBPSTUPDT_STR, 
CLIENT TYPE STRING,
PARTNER TYPE STRING,
STUDENT12 TYPE STRING,
MATRIKEL TYPE STRING,
STOBJID TYPE STRING,
AKTDB TYPE STRING,
AKTYP TYPE STRING,
XCHNG TYPE STRING,
NRRNG TYPE STRING,
XNREX TYPE STRING,
VALDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMACBPSTUPDT_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_CMACBPSTUPDT_STR-CLIENT sy-vline 
WA_CMACBPSTUPDT_STR-PARTNER sy-vline 
WA_CMACBPSTUPDT_STR-STUDENT12 sy-vline 
WA_CMACBPSTUPDT_STR-MATRIKEL sy-vline 
WA_CMACBPSTUPDT_STR-STOBJID sy-vline 
WA_CMACBPSTUPDT_STR-AKTDB sy-vline 
WA_CMACBPSTUPDT_STR-AKTYP sy-vline 
WA_CMACBPSTUPDT_STR-XCHNG sy-vline 
WA_CMACBPSTUPDT_STR-NRRNG sy-vline 
WA_CMACBPSTUPDT_STR-XNREX sy-vline 
WA_CMACBPSTUPDT_STR-VALDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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