ABAP Select data from SAP table DTADCAC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTADCAC
*  INTO TABLE @DATA(IT_DTADCAC2).
*--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_DTADCAC INDEX 1 INTO DATA(WA_DTADCAC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTADCAC>-C1TYP = 1.
<DTADCAC>-C1AMT = 1.
<DTADCAC>-C1DAT = 1.
<DTADCAC>-C1INS = 1.
<DTADCAC>-C1PAY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTADCAC-C1TRA, sy-vline,
  WA_DTADCAC-C1STT, sy-vline,
  WA_DTADCAC-C1SOR, sy-vline,
  WA_DTADCAC-C1PYN, sy-vline,
  WA_DTADCAC-C1LOR, sy-vline,
  WA_DTADCAC-C1CLI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DTADCAC 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_DTADCAC 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_DTADCAC INTO WA_DTADCAC.


*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_DTADCAC_STR, 
C1TYP TYPE STRING,
C1AMT TYPE STRING,
C1DAT TYPE STRING,
C1INS TYPE STRING,
C1PAY TYPE STRING,
C1TRA TYPE STRING,
C1STT TYPE STRING,
C1SOR TYPE STRING,
C1PYN TYPE STRING,
C1LOR TYPE STRING,
C1CLI TYPE STRING,
C1XRE TYPE STRING,
C1RID TYPE STRING,
C1RAC TYPE STRING,
C1INF TYPE STRING,
C1FIL TYPE STRING,
C1SET TYPE STRING,
C1INV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTADCAC_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_DTADCAC_STR-C1TYP sy-vline 
WA_DTADCAC_STR-C1AMT sy-vline 
WA_DTADCAC_STR-C1DAT sy-vline 
WA_DTADCAC_STR-C1INS sy-vline 
WA_DTADCAC_STR-C1PAY sy-vline 
WA_DTADCAC_STR-C1TRA sy-vline 
WA_DTADCAC_STR-C1STT sy-vline 
WA_DTADCAC_STR-C1SOR sy-vline 
WA_DTADCAC_STR-C1PYN sy-vline 
WA_DTADCAC_STR-C1LOR sy-vline 
WA_DTADCAC_STR-C1CLI sy-vline 
WA_DTADCAC_STR-C1XRE sy-vline 
WA_DTADCAC_STR-C1RID sy-vline 
WA_DTADCAC_STR-C1RAC sy-vline 
WA_DTADCAC_STR-C1INF sy-vline 
WA_DTADCAC_STR-C1FIL sy-vline 
WA_DTADCAC_STR-C1SET sy-vline 
WA_DTADCAC_STR-C1INV sy-vline      INTO ld_text SEPARATED BY SPACE.

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