ABAP Select data from SAP table DTADCHH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTADCHH
*  INTO TABLE @DATA(IT_DTADCHH2).
*--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_DTADCHH INDEX 1 INTO DATA(WA_DTADCHH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTADCHH>-H001 = 1.
<DTADCHH>-H005 = 1.
<DTADCHH>-H010 = 1.
<DTADCHH>-H015 = 1.
<DTADCHH>-H020 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTADCHH-H025, sy-vline,
  WA_DTADCHH-H030, sy-vline,
  WA_DTADCHH-H035, sy-vline,
  WA_DTADCHH-H040, sy-vline,
  WA_DTADCHH-H045, sy-vline,
  WA_DTADCHH-H047, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTADCHH 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_DTADCHH 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_DTADCHH INTO WA_DTADCHH.


*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_DTADCHH_STR, 
H001 TYPE STRING,
H005 TYPE STRING,
H010 TYPE STRING,
H015 TYPE STRING,
H020 TYPE STRING,
H025 TYPE STRING,
H030 TYPE STRING,
H035 TYPE STRING,
H040 TYPE STRING,
H045 TYPE STRING,
H047 TYPE STRING,
H050 TYPE STRING,
H100 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTADCHH_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_DTADCHH_STR-H001 sy-vline 
WA_DTADCHH_STR-H005 sy-vline 
WA_DTADCHH_STR-H010 sy-vline 
WA_DTADCHH_STR-H015 sy-vline 
WA_DTADCHH_STR-H020 sy-vline 
WA_DTADCHH_STR-H025 sy-vline 
WA_DTADCHH_STR-H030 sy-vline 
WA_DTADCHH_STR-H035 sy-vline 
WA_DTADCHH_STR-H040 sy-vline 
WA_DTADCHH_STR-H045 sy-vline 
WA_DTADCHH_STR-H047 sy-vline 
WA_DTADCHH_STR-H050 sy-vline 
WA_DTADCHH_STR-H100 sy-vline      INTO ld_text SEPARATED BY SPACE.

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