ABAP Select data from SAP table DTADCHD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTADCHD
*  INTO TABLE @DATA(IT_DTADCHD2).
*--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_DTADCHD INDEX 1 INTO DATA(WA_DTADCHD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTADCHD>-DRA1 = 1.
<DTADCHD>-DHDR = 1.
<DTADCHD>-D20A = 1.
<DTADCHD>-D20B = 1.
<DTADCHD>-D25A = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTADCHD-D32A, sy-vline,
  WA_DTADCHD-D32B, sy-vline,
  WA_DTADCHD-D32C, sy-vline,
  WA_DTADCHD-DRE1, sy-vline,
  WA_DTADCHD-DRA2, sy-vline,
  WA_DTADCHD-D36A, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTADCHD 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_DTADCHD 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_DTADCHD INTO WA_DTADCHD.


*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_DTADCHD_STR, 
DRA1 TYPE STRING,
DHDR TYPE STRING,
D20A TYPE STRING,
D20B TYPE STRING,
D25A TYPE STRING,
D32A TYPE STRING,
D32B TYPE STRING,
D32C TYPE STRING,
DRE1 TYPE STRING,
DRA2 TYPE STRING,
D36A TYPE STRING,
D50A TYPE STRING,
D50C TYPE STRING,
D50E TYPE STRING,
D50G TYPE STRING,
DRE2 TYPE STRING,
DRA3 TYPE STRING,
D57X TYPE STRING,
D57A TYPE STRING,
D57B TYPE STRING,
D57E TYPE STRING,
D57G TYPE STRING,
D57I TYPE STRING,
D57K TYPE STRING,
DRE3 TYPE STRING,
DRA4 TYPE STRING,
D59A TYPE STRING,
D59B TYPE STRING,
D59D TYPE STRING,
D59F TYPE STRING,
D59H TYPE STRING,
D59J TYPE STRING,
DRE4 TYPE STRING,
DRA5 TYPE STRING,
D70A TYPE STRING,
D70C TYPE STRING,
D70E TYPE STRING,
D70G TYPE STRING,
DRE5 TYPE STRING,
DRA6 TYPE STRING,
D72A TYPE STRING,
D72B TYPE STRING,
D72C TYPE STRING,
D72D TYPE STRING,
DRE6 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTADCHD_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_DTADCHD_STR-DRA1 sy-vline 
WA_DTADCHD_STR-DHDR sy-vline 
WA_DTADCHD_STR-D20A sy-vline 
WA_DTADCHD_STR-D20B sy-vline 
WA_DTADCHD_STR-D25A sy-vline 
WA_DTADCHD_STR-D32A sy-vline 
WA_DTADCHD_STR-D32B sy-vline 
WA_DTADCHD_STR-D32C sy-vline 
WA_DTADCHD_STR-DRE1 sy-vline 
WA_DTADCHD_STR-DRA2 sy-vline 
WA_DTADCHD_STR-D36A sy-vline 
WA_DTADCHD_STR-D50A sy-vline 
WA_DTADCHD_STR-D50C sy-vline 
WA_DTADCHD_STR-D50E sy-vline 
WA_DTADCHD_STR-D50G sy-vline 
WA_DTADCHD_STR-DRE2 sy-vline 
WA_DTADCHD_STR-DRA3 sy-vline 
WA_DTADCHD_STR-D57X sy-vline 
WA_DTADCHD_STR-D57A sy-vline 
WA_DTADCHD_STR-D57B sy-vline 
WA_DTADCHD_STR-D57E sy-vline 
WA_DTADCHD_STR-D57G sy-vline 
WA_DTADCHD_STR-D57I sy-vline 
WA_DTADCHD_STR-D57K sy-vline 
WA_DTADCHD_STR-DRE3 sy-vline 
WA_DTADCHD_STR-DRA4 sy-vline 
WA_DTADCHD_STR-D59A sy-vline 
WA_DTADCHD_STR-D59B sy-vline 
WA_DTADCHD_STR-D59D sy-vline 
WA_DTADCHD_STR-D59F sy-vline 
WA_DTADCHD_STR-D59H sy-vline 
WA_DTADCHD_STR-D59J sy-vline 
WA_DTADCHD_STR-DRE4 sy-vline 
WA_DTADCHD_STR-DRA5 sy-vline 
WA_DTADCHD_STR-D70A sy-vline 
WA_DTADCHD_STR-D70C sy-vline 
WA_DTADCHD_STR-D70E sy-vline 
WA_DTADCHD_STR-D70G sy-vline 
WA_DTADCHD_STR-DRE5 sy-vline 
WA_DTADCHD_STR-DRA6 sy-vline 
WA_DTADCHD_STR-D72A sy-vline 
WA_DTADCHD_STR-D72B sy-vline 
WA_DTADCHD_STR-D72C sy-vline 
WA_DTADCHD_STR-D72D sy-vline 
WA_DTADCHD_STR-DRE6 sy-vline      INTO ld_text SEPARATED BY SPACE.

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