SAP C401 ABAP Select data from SAP table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP C401 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 C401. 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 C401 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_C401 TYPE STANDARD TABLE OF C401,
      WA_C401 TYPE C401,
      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: <C401> TYPE C401.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_C401.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM C401
  INTO TABLE IT_C401.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM C401
*  INTO TABLE @DATA(IT_C4012).
*--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_C401 INDEX 1 INTO DATA(WA_C4012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_C401 ASSIGNING <C401>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<C401>-MANDT = 1.
<C401>-KAPPL = 1.
<C401>-KSCHL = 1.
<C401>-KTOPL = 1.
<C401>-KVSL1 = 1.

ENDLOOP.

LOOP AT IT_C401 INTO WA_C401.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_C401-ISHFALAR, sy-vline,
  WA_C401-ISHEINRI, sy-vline,
  WA_C401-ISHABTAR, sy-vline,
  WA_C401-ISHABLST, sy-vline,
  WA_C401-ISHCARKZ, sy-vline,
  WA_C401-ISHBARKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_C401 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_C401 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_C401 INTO WA_C401.


*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 SAKN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_C401-SAKN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_C401-SAKN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAKN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_C401-SAKN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_C401-SAKN2.
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_C401_STR, 
MANDT TYPE STRING,
KAPPL TYPE STRING,
KSCHL TYPE STRING,
KTOPL TYPE STRING,
KVSL1 TYPE STRING,
ISHFALAR TYPE STRING,
ISHEINRI TYPE STRING,
ISHABTAR TYPE STRING,
ISHABLST TYPE STRING,
ISHCARKZ TYPE STRING,
ISHBARKZ TYPE STRING,
SAKN1 TYPE STRING,
SAKN2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_C401_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_C401_STR-MANDT sy-vline 
WA_C401_STR-KAPPL sy-vline 
WA_C401_STR-KSCHL sy-vline 
WA_C401_STR-KTOPL sy-vline 
WA_C401_STR-KVSL1 sy-vline 
WA_C401_STR-ISHFALAR sy-vline 
WA_C401_STR-ISHEINRI sy-vline 
WA_C401_STR-ISHABTAR sy-vline 
WA_C401_STR-ISHABLST sy-vline 
WA_C401_STR-ISHCARKZ sy-vline 
WA_C401_STR-ISHBARKZ sy-vline 
WA_C401_STR-SAKN1 sy-vline 
WA_C401_STR-SAKN2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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

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