ABAP Select data from SAP table DTATCHF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTATCHF
*  INTO TABLE @DATA(IT_DTATCHF2).
*--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_DTATCHF INDEX 1 INTO DATA(WA_DTATCHF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTATCHF>-FSOH = 1.
<DTATCHF>-FHDR = 1.
<DTATCHF>-FCRP = 1.
<DTATCHF>-F20 = 1.
<DTATCHF>-F20A = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTATCHF-F20B, sy-vline,
  WA_DTATCHF-F20Z, sy-vline,
  WA_DTATCHF-F25, sy-vline,
  WA_DTATCHF-F25A, sy-vline,
  WA_DTATCHF-F25Z, sy-vline,
  WA_DTATCHF-F32, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTATCHF 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_DTATCHF 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_DTATCHF INTO WA_DTATCHF.


*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_DTATCHF_STR, 
FSOH TYPE STRING,
FHDR TYPE STRING,
FCRP TYPE STRING,
F20 TYPE STRING,
F20A TYPE STRING,
F20B TYPE STRING,
F20Z TYPE STRING,
F25 TYPE STRING,
F25A TYPE STRING,
F25Z TYPE STRING,
F32 TYPE STRING,
F32A TYPE STRING,
F32B TYPE STRING,
F32C TYPE STRING,
F32Z TYPE STRING,
F50 TYPE STRING,
F50A TYPE STRING,
F50B TYPE STRING,
F50C TYPE STRING,
F50D TYPE STRING,
F50E TYPE STRING,
F50F TYPE STRING,
F50G TYPE STRING,
F50Z TYPE STRING,
F59 TYPE STRING,
F59A TYPE STRING,
F59B TYPE STRING,
F59C TYPE STRING,
F59D TYPE STRING,
F59E TYPE STRING,
F59F TYPE STRING,
F59G TYPE STRING,
F59H TYPE STRING,
F59I TYPE STRING,
F59J TYPE STRING,
F59Z TYPE STRING,
F70 TYPE STRING,
F70A TYPE STRING,
F70B TYPE STRING,
F70C TYPE STRING,
F70D TYPE STRING,
F70E TYPE STRING,
F70F TYPE STRING,
F70G TYPE STRING,
F70Z TYPE STRING,
FETX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTATCHF_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_DTATCHF_STR-FSOH sy-vline 
WA_DTATCHF_STR-FHDR sy-vline 
WA_DTATCHF_STR-FCRP sy-vline 
WA_DTATCHF_STR-F20 sy-vline 
WA_DTATCHF_STR-F20A sy-vline 
WA_DTATCHF_STR-F20B sy-vline 
WA_DTATCHF_STR-F20Z sy-vline 
WA_DTATCHF_STR-F25 sy-vline 
WA_DTATCHF_STR-F25A sy-vline 
WA_DTATCHF_STR-F25Z sy-vline 
WA_DTATCHF_STR-F32 sy-vline 
WA_DTATCHF_STR-F32A sy-vline 
WA_DTATCHF_STR-F32B sy-vline 
WA_DTATCHF_STR-F32C sy-vline 
WA_DTATCHF_STR-F32Z sy-vline 
WA_DTATCHF_STR-F50 sy-vline 
WA_DTATCHF_STR-F50A sy-vline 
WA_DTATCHF_STR-F50B sy-vline 
WA_DTATCHF_STR-F50C sy-vline 
WA_DTATCHF_STR-F50D sy-vline 
WA_DTATCHF_STR-F50E sy-vline 
WA_DTATCHF_STR-F50F sy-vline 
WA_DTATCHF_STR-F50G sy-vline 
WA_DTATCHF_STR-F50Z sy-vline 
WA_DTATCHF_STR-F59 sy-vline 
WA_DTATCHF_STR-F59A sy-vline 
WA_DTATCHF_STR-F59B sy-vline 
WA_DTATCHF_STR-F59C sy-vline 
WA_DTATCHF_STR-F59D sy-vline 
WA_DTATCHF_STR-F59E sy-vline 
WA_DTATCHF_STR-F59F sy-vline 
WA_DTATCHF_STR-F59G sy-vline 
WA_DTATCHF_STR-F59H sy-vline 
WA_DTATCHF_STR-F59I sy-vline 
WA_DTATCHF_STR-F59J sy-vline 
WA_DTATCHF_STR-F59Z sy-vline 
WA_DTATCHF_STR-F70 sy-vline 
WA_DTATCHF_STR-F70A sy-vline 
WA_DTATCHF_STR-F70B sy-vline 
WA_DTATCHF_STR-F70C sy-vline 
WA_DTATCHF_STR-F70D sy-vline 
WA_DTATCHF_STR-F70E sy-vline 
WA_DTATCHF_STR-F70F sy-vline 
WA_DTATCHF_STR-F70G sy-vline 
WA_DTATCHF_STR-F70Z sy-vline 
WA_DTATCHF_STR-FETX sy-vline      INTO ld_text SEPARATED BY SPACE.

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