ABAP Select data from SAP table DTATCHB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTATCHB
*  INTO TABLE @DATA(IT_DTATCHB2).
*--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_DTATCHB INDEX 1 INTO DATA(WA_DTATCHB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTATCHB>-BSOH = 1.
<DTATCHB>-BHDR = 1.
<DTATCHB>-BCRP = 1.
<DTATCHB>-B20 = 1.
<DTATCHB>-B20A = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTATCHB-B20B, sy-vline,
  WA_DTATCHB-B20Z, sy-vline,
  WA_DTATCHB-B25, sy-vline,
  WA_DTATCHB-B25A, sy-vline,
  WA_DTATCHB-B25Z, sy-vline,
  WA_DTATCHB-B32, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTATCHB 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_DTATCHB 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_DTATCHB INTO WA_DTATCHB.


*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_DTATCHB_STR, 
BSOH TYPE STRING,
BHDR TYPE STRING,
BCRP TYPE STRING,
B20 TYPE STRING,
B20A TYPE STRING,
B20B TYPE STRING,
B20Z TYPE STRING,
B25 TYPE STRING,
B25A TYPE STRING,
B25Z TYPE STRING,
B32 TYPE STRING,
B32A TYPE STRING,
B32B TYPE STRING,
B32C TYPE STRING,
B32Z TYPE STRING,
B50 TYPE STRING,
B50A TYPE STRING,
B50B TYPE STRING,
B50C TYPE STRING,
B50D TYPE STRING,
B50E TYPE STRING,
B50F TYPE STRING,
B50G TYPE STRING,
B50Z TYPE STRING,
B59 TYPE STRING,
B59A TYPE STRING,
B59B TYPE STRING,
B59C TYPE STRING,
B59D TYPE STRING,
B59E TYPE STRING,
B59F TYPE STRING,
B59G TYPE STRING,
B59H TYPE STRING,
B59I TYPE STRING,
B59J TYPE STRING,
B59K TYPE STRING,
B59Z TYPE STRING,
B70 TYPE STRING,
B70A TYPE STRING,
B70B TYPE STRING,
B70C TYPE STRING,
B70D TYPE STRING,
B70E TYPE STRING,
B70F TYPE STRING,
B70G TYPE STRING,
B70H TYPE STRING,
B70I TYPE STRING,
B70Z TYPE STRING,
BETX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTATCHB_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_DTATCHB_STR-BSOH sy-vline 
WA_DTATCHB_STR-BHDR sy-vline 
WA_DTATCHB_STR-BCRP sy-vline 
WA_DTATCHB_STR-B20 sy-vline 
WA_DTATCHB_STR-B20A sy-vline 
WA_DTATCHB_STR-B20B sy-vline 
WA_DTATCHB_STR-B20Z sy-vline 
WA_DTATCHB_STR-B25 sy-vline 
WA_DTATCHB_STR-B25A sy-vline 
WA_DTATCHB_STR-B25Z sy-vline 
WA_DTATCHB_STR-B32 sy-vline 
WA_DTATCHB_STR-B32A sy-vline 
WA_DTATCHB_STR-B32B sy-vline 
WA_DTATCHB_STR-B32C sy-vline 
WA_DTATCHB_STR-B32Z sy-vline 
WA_DTATCHB_STR-B50 sy-vline 
WA_DTATCHB_STR-B50A sy-vline 
WA_DTATCHB_STR-B50B sy-vline 
WA_DTATCHB_STR-B50C sy-vline 
WA_DTATCHB_STR-B50D sy-vline 
WA_DTATCHB_STR-B50E sy-vline 
WA_DTATCHB_STR-B50F sy-vline 
WA_DTATCHB_STR-B50G sy-vline 
WA_DTATCHB_STR-B50Z sy-vline 
WA_DTATCHB_STR-B59 sy-vline 
WA_DTATCHB_STR-B59A sy-vline 
WA_DTATCHB_STR-B59B sy-vline 
WA_DTATCHB_STR-B59C sy-vline 
WA_DTATCHB_STR-B59D sy-vline 
WA_DTATCHB_STR-B59E sy-vline 
WA_DTATCHB_STR-B59F sy-vline 
WA_DTATCHB_STR-B59G sy-vline 
WA_DTATCHB_STR-B59H sy-vline 
WA_DTATCHB_STR-B59I sy-vline 
WA_DTATCHB_STR-B59J sy-vline 
WA_DTATCHB_STR-B59K sy-vline 
WA_DTATCHB_STR-B59Z sy-vline 
WA_DTATCHB_STR-B70 sy-vline 
WA_DTATCHB_STR-B70A sy-vline 
WA_DTATCHB_STR-B70B sy-vline 
WA_DTATCHB_STR-B70C sy-vline 
WA_DTATCHB_STR-B70D sy-vline 
WA_DTATCHB_STR-B70E sy-vline 
WA_DTATCHB_STR-B70F sy-vline 
WA_DTATCHB_STR-B70G sy-vline 
WA_DTATCHB_STR-B70H sy-vline 
WA_DTATCHB_STR-B70I sy-vline 
WA_DTATCHB_STR-B70Z sy-vline 
WA_DTATCHB_STR-BETX sy-vline      INTO ld_text SEPARATED BY SPACE.

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