ABAP Select data from SAP table DTATCHE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTATCHE
*  INTO TABLE @DATA(IT_DTATCHE2).
*--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_DTATCHE INDEX 1 INTO DATA(WA_DTATCHE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTATCHE>-ESOH = 1.
<DTATCHE>-EHDR = 1.
<DTATCHE>-ECRP = 1.
<DTATCHE>-E20 = 1.
<DTATCHE>-E20A = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTATCHE-E20B, sy-vline,
  WA_DTATCHE-E20Z, sy-vline,
  WA_DTATCHE-E25, sy-vline,
  WA_DTATCHE-E25A, sy-vline,
  WA_DTATCHE-E25Z, sy-vline,
  WA_DTATCHE-E32, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTATCHE 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_DTATCHE 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_DTATCHE INTO WA_DTATCHE.


*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_DTATCHE_STR, 
ESOH TYPE STRING,
EHDR TYPE STRING,
ECRP TYPE STRING,
E20 TYPE STRING,
E20A TYPE STRING,
E20B TYPE STRING,
E20Z TYPE STRING,
E25 TYPE STRING,
E25A TYPE STRING,
E25Z TYPE STRING,
E32 TYPE STRING,
E32A TYPE STRING,
E32B TYPE STRING,
E32C TYPE STRING,
E32Z TYPE STRING,
E50 TYPE STRING,
E50A TYPE STRING,
E50B TYPE STRING,
E50C TYPE STRING,
E50D TYPE STRING,
E50E TYPE STRING,
E50F TYPE STRING,
E50G TYPE STRING,
E50Z TYPE STRING,
E59 TYPE STRING,
E59A TYPE STRING,
E59B TYPE STRING,
E59C TYPE STRING,
E59D TYPE STRING,
E59E TYPE STRING,
E59F TYPE STRING,
E59G TYPE STRING,
E59H TYPE STRING,
E59I TYPE STRING,
E59J TYPE STRING,
E59Z TYPE STRING,
E70 TYPE STRING,
E70A TYPE STRING,
E70B TYPE STRING,
E70C TYPE STRING,
E70D TYPE STRING,
E70E TYPE STRING,
E70F TYPE STRING,
E70G TYPE STRING,
E70Z TYPE STRING,
EETX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTATCHE_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_DTATCHE_STR-ESOH sy-vline 
WA_DTATCHE_STR-EHDR sy-vline 
WA_DTATCHE_STR-ECRP sy-vline 
WA_DTATCHE_STR-E20 sy-vline 
WA_DTATCHE_STR-E20A sy-vline 
WA_DTATCHE_STR-E20B sy-vline 
WA_DTATCHE_STR-E20Z sy-vline 
WA_DTATCHE_STR-E25 sy-vline 
WA_DTATCHE_STR-E25A sy-vline 
WA_DTATCHE_STR-E25Z sy-vline 
WA_DTATCHE_STR-E32 sy-vline 
WA_DTATCHE_STR-E32A sy-vline 
WA_DTATCHE_STR-E32B sy-vline 
WA_DTATCHE_STR-E32C sy-vline 
WA_DTATCHE_STR-E32Z sy-vline 
WA_DTATCHE_STR-E50 sy-vline 
WA_DTATCHE_STR-E50A sy-vline 
WA_DTATCHE_STR-E50B sy-vline 
WA_DTATCHE_STR-E50C sy-vline 
WA_DTATCHE_STR-E50D sy-vline 
WA_DTATCHE_STR-E50E sy-vline 
WA_DTATCHE_STR-E50F sy-vline 
WA_DTATCHE_STR-E50G sy-vline 
WA_DTATCHE_STR-E50Z sy-vline 
WA_DTATCHE_STR-E59 sy-vline 
WA_DTATCHE_STR-E59A sy-vline 
WA_DTATCHE_STR-E59B sy-vline 
WA_DTATCHE_STR-E59C sy-vline 
WA_DTATCHE_STR-E59D sy-vline 
WA_DTATCHE_STR-E59E sy-vline 
WA_DTATCHE_STR-E59F sy-vline 
WA_DTATCHE_STR-E59G sy-vline 
WA_DTATCHE_STR-E59H sy-vline 
WA_DTATCHE_STR-E59I sy-vline 
WA_DTATCHE_STR-E59J sy-vline 
WA_DTATCHE_STR-E59Z sy-vline 
WA_DTATCHE_STR-E70 sy-vline 
WA_DTATCHE_STR-E70A sy-vline 
WA_DTATCHE_STR-E70B sy-vline 
WA_DTATCHE_STR-E70C sy-vline 
WA_DTATCHE_STR-E70D sy-vline 
WA_DTATCHE_STR-E70E sy-vline 
WA_DTATCHE_STR-E70F sy-vline 
WA_DTATCHE_STR-E70G sy-vline 
WA_DTATCHE_STR-E70Z sy-vline 
WA_DTATCHE_STR-EETX sy-vline      INTO ld_text SEPARATED BY SPACE.

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