ABAP Select data from SAP table DTAUSCTX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTAUSCTX
*  INTO TABLE @DATA(IT_DTAUSCTX2).
*--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_DTAUSCTX INDEX 1 INTO DATA(WA_DTAUSCTX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTAUSCTX>-CTX1 = 1.
<DTAUSCTX>-CTX2 = 1.
<DTAUSCTX>-CTX3 = 1.
<DTAUSCTX>-CTX4 = 1.
<DTAUSCTX>-CTX5 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTAUSCTX-CTX6, sy-vline,
  WA_DTAUSCTX-CTX7, sy-vline,
  WA_DTAUSCTX-CTX8, sy-vline,
  WA_DTAUSCTX-CTX9, sy-vline,
  WA_DTAUSCTX-CTX10, sy-vline,
  WA_DTAUSCTX-CTX11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTAUSCTX 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_DTAUSCTX 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_DTAUSCTX INTO WA_DTAUSCTX.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DTAUSCTX_STR, 
CTX1 TYPE STRING,
CTX2 TYPE STRING,
CTX3 TYPE STRING,
CTX4 TYPE STRING,
CTX5 TYPE STRING,
CTX6 TYPE STRING,
CTX7 TYPE STRING,
CTX8 TYPE STRING,
CTX9 TYPE STRING,
CTX10 TYPE STRING,
CTX11 TYPE STRING,
CTX12 TYPE STRING,
CTX13 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTAUSCTX_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_DTAUSCTX_STR-CTX1 sy-vline 
WA_DTAUSCTX_STR-CTX2 sy-vline 
WA_DTAUSCTX_STR-CTX3 sy-vline 
WA_DTAUSCTX_STR-CTX4 sy-vline 
WA_DTAUSCTX_STR-CTX5 sy-vline 
WA_DTAUSCTX_STR-CTX6 sy-vline 
WA_DTAUSCTX_STR-CTX7 sy-vline 
WA_DTAUSCTX_STR-CTX8 sy-vline 
WA_DTAUSCTX_STR-CTX9 sy-vline 
WA_DTAUSCTX_STR-CTX10 sy-vline 
WA_DTAUSCTX_STR-CTX11 sy-vline 
WA_DTAUSCTX_STR-CTX12 sy-vline 
WA_DTAUSCTX_STR-CTX13 sy-vline      INTO ld_text SEPARATED BY SPACE.

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