ABAP Select data from SAP table TXW_ACCDET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXW_ACCDET
*  INTO TABLE @DATA(IT_TXW_ACCDET2).
*--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_TXW_ACCDET INDEX 1 INTO DATA(WA_TXW_ACCDET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXW_ACCDET>-MANDT = 1.
<TXW_ACCDET>-KTOPL = 1.
<TXW_ACCDET>-KTOGR = 1.
<TXW_ACCDET>-AFABE = 1.
<TXW_ACCDET>-KTGRTX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXW_ACCDET-KTANSW, sy-vline,
  WA_TXW_ACCDET-KTANSG, sy-vline,
  WA_TXW_ACCDET-KTCOAB, sy-vline,
  WA_TXW_ACCDET-KTERLW, sy-vline,
  WA_TXW_ACCDET-KTMEHR, sy-vline,
  WA_TXW_ACCDET-KTMIND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXW_ACCDET 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_TXW_ACCDET 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_TXW_ACCDET INTO WA_TXW_ACCDET.


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

*Conversion exit ALPHA, internal->external for field KTANSW
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTANSW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTANSW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTANSG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTANSG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTANSG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTCOAB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTCOAB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTCOAB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTERLW
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTERLW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTERLW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTMEHR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTMEHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTMEHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTMIND
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTMIND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTMIND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTREST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTREST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTREST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTVBAB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTVBAB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTVBAB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTVERK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTVERK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTVERK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTVIZU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTVIZU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTVIZU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTVZU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TXW_ACCDET-KTVZU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TXW_ACCDET-KTVZU.
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_TXW_ACCDET_STR, 
MANDT TYPE STRING,
KTOPL TYPE STRING,
KTOGR TYPE STRING,
AFABE TYPE STRING,
KTGRTX TYPE STRING,
KTANSW TYPE STRING,
KTANSG TYPE STRING,
KTCOAB TYPE STRING,
KTERLW TYPE STRING,
KTMEHR TYPE STRING,
KTMIND TYPE STRING,
KTREST TYPE STRING,
KTVBAB TYPE STRING,
KTVERK TYPE STRING,
KTVIZU TYPE STRING,
KTVZU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXW_ACCDET_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_TXW_ACCDET_STR-MANDT sy-vline 
WA_TXW_ACCDET_STR-KTOPL sy-vline 
WA_TXW_ACCDET_STR-KTOGR sy-vline 
WA_TXW_ACCDET_STR-AFABE sy-vline 
WA_TXW_ACCDET_STR-KTGRTX sy-vline 
WA_TXW_ACCDET_STR-KTANSW sy-vline 
WA_TXW_ACCDET_STR-KTANSG sy-vline 
WA_TXW_ACCDET_STR-KTCOAB sy-vline 
WA_TXW_ACCDET_STR-KTERLW sy-vline 
WA_TXW_ACCDET_STR-KTMEHR sy-vline 
WA_TXW_ACCDET_STR-KTMIND sy-vline 
WA_TXW_ACCDET_STR-KTREST sy-vline 
WA_TXW_ACCDET_STR-KTVBAB sy-vline 
WA_TXW_ACCDET_STR-KTVERK sy-vline 
WA_TXW_ACCDET_STR-KTVIZU sy-vline 
WA_TXW_ACCDET_STR-KTVZU sy-vline      INTO ld_text SEPARATED BY SPACE.

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