ABAP Select data from SAP table CACS_DOCFI_T into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CACS_DOCFI_T
*  INTO TABLE @DATA(IT_CACS_DOCFI_T2).
*--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_CACS_DOCFI_T INDEX 1 INTO DATA(WA_CACS_DOCFI_T2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CACS_DOCFI_T>-MANDT = 1.
<CACS_DOCFI_T>-APPL = 1.
<CACS_DOCFI_T>-POST_YEAR = 1.
<CACS_DOCFI_T>-DOC_ID = 1.
<CACS_DOCFI_T>-SETTL_POS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CACS_DOCFI_T-SETTL_TAX_POS, sy-vline,
  WA_CACS_DOCFI_T-WMWST, sy-vline,
  WA_CACS_DOCFI_T-MSATZ, sy-vline,
  WA_CACS_DOCFI_T-KTOSL, sy-vline,
  WA_CACS_DOCFI_T-TXJCD, sy-vline,
  WA_CACS_DOCFI_T-KNUMH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CACS_DOCFI_T 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_CACS_DOCFI_T 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_CACS_DOCFI_T INTO WA_CACS_DOCFI_T.


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

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CACS_DOCFI_T-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CACS_DOCFI_T-HKONT.
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_CACS_DOCFI_T_STR, 
MANDT TYPE STRING,
APPL TYPE STRING,
POST_YEAR TYPE STRING,
DOC_ID TYPE STRING,
SETTL_POS TYPE STRING,
SETTL_TAX_POS TYPE STRING,
WMWST TYPE STRING,
MSATZ TYPE STRING,
KTOSL TYPE STRING,
TXJCD TYPE STRING,
KNUMH TYPE STRING,
KBETR TYPE STRING,
KAWRT TYPE STRING,
HKONT TYPE STRING,
KSCHL TYPE STRING,
TXJCD_DEEP TYPE STRING,
TXJLV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CACS_DOCFI_T_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_CACS_DOCFI_T_STR-MANDT sy-vline 
WA_CACS_DOCFI_T_STR-APPL sy-vline 
WA_CACS_DOCFI_T_STR-POST_YEAR sy-vline 
WA_CACS_DOCFI_T_STR-DOC_ID sy-vline 
WA_CACS_DOCFI_T_STR-SETTL_POS sy-vline 
WA_CACS_DOCFI_T_STR-SETTL_TAX_POS sy-vline 
WA_CACS_DOCFI_T_STR-WMWST sy-vline 
WA_CACS_DOCFI_T_STR-MSATZ sy-vline 
WA_CACS_DOCFI_T_STR-KTOSL sy-vline 
WA_CACS_DOCFI_T_STR-TXJCD sy-vline 
WA_CACS_DOCFI_T_STR-KNUMH sy-vline 
WA_CACS_DOCFI_T_STR-KBETR sy-vline 
WA_CACS_DOCFI_T_STR-KAWRT sy-vline 
WA_CACS_DOCFI_T_STR-HKONT sy-vline 
WA_CACS_DOCFI_T_STR-KSCHL sy-vline 
WA_CACS_DOCFI_T_STR-TXJCD_DEEP sy-vline 
WA_CACS_DOCFI_T_STR-TXJLV sy-vline      INTO ld_text SEPARATED BY SPACE.

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