ABAP Select data from SAP table DTADCHB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTADCHB
*  INTO TABLE @DATA(IT_DTADCHB2).
*--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_DTADCHB INDEX 1 INTO DATA(WA_DTADCHB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTADCHB>-BRA1 = 1.
<DTADCHB>-BHDR = 1.
<DTADCHB>-B20A = 1.
<DTADCHB>-B20B = 1.
<DTADCHB>-B25A = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTADCHB-B32A, sy-vline,
  WA_DTADCHB-B32B, sy-vline,
  WA_DTADCHB-B32C, sy-vline,
  WA_DTADCHB-BRE1, sy-vline,
  WA_DTADCHB-BRA2, sy-vline,
  WA_DTADCHB-B50A, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTADCHB 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_DTADCHB 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_DTADCHB INTO WA_DTADCHB.


*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_DTADCHB_STR, 
BRA1 TYPE STRING,
BHDR TYPE STRING,
B20A TYPE STRING,
B20B TYPE STRING,
B25A TYPE STRING,
B32A TYPE STRING,
B32B TYPE STRING,
B32C TYPE STRING,
BRE1 TYPE STRING,
BRA2 TYPE STRING,
B50A TYPE STRING,
B50C TYPE STRING,
B50E TYPE STRING,
B50G TYPE STRING,
BRE2 TYPE STRING,
BRA3 TYPE STRING,
B59A TYPE STRING,
B59B TYPE STRING,
B59E TYPE STRING,
B59G TYPE STRING,
B59I TYPE STRING,
B59K TYPE STRING,
B70A TYPE STRING,
B70D TYPE STRING,
BRE3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTADCHB_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_DTADCHB_STR-BRA1 sy-vline 
WA_DTADCHB_STR-BHDR sy-vline 
WA_DTADCHB_STR-B20A sy-vline 
WA_DTADCHB_STR-B20B sy-vline 
WA_DTADCHB_STR-B25A sy-vline 
WA_DTADCHB_STR-B32A sy-vline 
WA_DTADCHB_STR-B32B sy-vline 
WA_DTADCHB_STR-B32C sy-vline 
WA_DTADCHB_STR-BRE1 sy-vline 
WA_DTADCHB_STR-BRA2 sy-vline 
WA_DTADCHB_STR-B50A sy-vline 
WA_DTADCHB_STR-B50C sy-vline 
WA_DTADCHB_STR-B50E sy-vline 
WA_DTADCHB_STR-B50G sy-vline 
WA_DTADCHB_STR-BRE2 sy-vline 
WA_DTADCHB_STR-BRA3 sy-vline 
WA_DTADCHB_STR-B59A sy-vline 
WA_DTADCHB_STR-B59B sy-vline 
WA_DTADCHB_STR-B59E sy-vline 
WA_DTADCHB_STR-B59G sy-vline 
WA_DTADCHB_STR-B59I sy-vline 
WA_DTADCHB_STR-B59K sy-vline 
WA_DTADCHB_STR-B70A sy-vline 
WA_DTADCHB_STR-B70D sy-vline 
WA_DTADCHB_STR-BRE3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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