ABAP Select data from SAP table DTADCHC into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTADCHC
*  INTO TABLE @DATA(IT_DTADCHC2).
*--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_DTADCHC INDEX 1 INTO DATA(WA_DTADCHC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTADCHC>-CRA1 = 1.
<DTADCHC>-CHDR = 1.
<DTADCHC>-C20A = 1.
<DTADCHC>-C20B = 1.
<DTADCHC>-C25A = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTADCHC-C32A, sy-vline,
  WA_DTADCHC-C32B, sy-vline,
  WA_DTADCHC-C32C, sy-vline,
  WA_DTADCHC-CRE1, sy-vline,
  WA_DTADCHC-CRA2, sy-vline,
  WA_DTADCHC-C50A, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTADCHC 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_DTADCHC 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_DTADCHC INTO WA_DTADCHC.


*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_DTADCHC_STR, 
CRA1 TYPE STRING,
CHDR TYPE STRING,
C20A TYPE STRING,
C20B TYPE STRING,
C25A TYPE STRING,
C32A TYPE STRING,
C32B TYPE STRING,
C32C TYPE STRING,
CRE1 TYPE STRING,
CRA2 TYPE STRING,
C50A TYPE STRING,
C50C TYPE STRING,
C50E TYPE STRING,
C50G TYPE STRING,
CRE2 TYPE STRING,
CRA3 TYPE STRING,
C59A TYPE STRING,
C59B TYPE STRING,
C59D TYPE STRING,
C59F TYPE STRING,
C59H TYPE STRING,
C59J TYPE STRING,
CRA4 TYPE STRING,
C70A TYPE STRING,
C70C TYPE STRING,
C70E TYPE STRING,
C70G TYPE STRING,
CRE4 TYPE STRING,
CRA5 TYPE STRING,
C55A TYPE STRING,
C55B TYPE STRING,
C55D TYPE STRING,
C55F TYPE STRING,
C55H TYPE STRING,
C55J TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTADCHC_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_DTADCHC_STR-CRA1 sy-vline 
WA_DTADCHC_STR-CHDR sy-vline 
WA_DTADCHC_STR-C20A sy-vline 
WA_DTADCHC_STR-C20B sy-vline 
WA_DTADCHC_STR-C25A sy-vline 
WA_DTADCHC_STR-C32A sy-vline 
WA_DTADCHC_STR-C32B sy-vline 
WA_DTADCHC_STR-C32C sy-vline 
WA_DTADCHC_STR-CRE1 sy-vline 
WA_DTADCHC_STR-CRA2 sy-vline 
WA_DTADCHC_STR-C50A sy-vline 
WA_DTADCHC_STR-C50C sy-vline 
WA_DTADCHC_STR-C50E sy-vline 
WA_DTADCHC_STR-C50G sy-vline 
WA_DTADCHC_STR-CRE2 sy-vline 
WA_DTADCHC_STR-CRA3 sy-vline 
WA_DTADCHC_STR-C59A sy-vline 
WA_DTADCHC_STR-C59B sy-vline 
WA_DTADCHC_STR-C59D sy-vline 
WA_DTADCHC_STR-C59F sy-vline 
WA_DTADCHC_STR-C59H sy-vline 
WA_DTADCHC_STR-C59J sy-vline 
WA_DTADCHC_STR-CRA4 sy-vline 
WA_DTADCHC_STR-C70A sy-vline 
WA_DTADCHC_STR-C70C sy-vline 
WA_DTADCHC_STR-C70E sy-vline 
WA_DTADCHC_STR-C70G sy-vline 
WA_DTADCHC_STR-CRE4 sy-vline 
WA_DTADCHC_STR-CRA5 sy-vline 
WA_DTADCHC_STR-C55A sy-vline 
WA_DTADCHC_STR-C55B sy-vline 
WA_DTADCHC_STR-C55D sy-vline 
WA_DTADCHC_STR-C55F sy-vline 
WA_DTADCHC_STR-C55H sy-vline 
WA_DTADCHC_STR-C55J sy-vline      INTO ld_text SEPARATED BY SPACE.

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