ABAP Select data from SAP table DCENACTCHK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCENACTCHK
*  INTO TABLE @DATA(IT_DCENACTCHK2).
*--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_DCENACTCHK INDEX 1 INTO DATA(WA_DCENACTCHK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCENACTCHK>-OBJNAME_OK = 1.
<DCENACTCHK>-EXIS_ENQU = 1.
<DCENACTCHK>-NAME_EQUHD = 1.
<DCENACTCHK>-AGGTYPE_OK = 1.
<DCENACTCHK>-NAME_EQUBT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCENACTCHK-PRIMTABOK, sy-vline,
  WA_DCENACTCHK-POSITIONOK, sy-vline,
  WA_DCENACTCHK-TABLEACTIV, sy-vline,
  WA_DCENACTCHK-BT_DIFFER, sy-vline,
  WA_DCENACTCHK-ENMODUS_OK, sy-vline,
  WA_DCENACTCHK-MODI_IN_BT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCENACTCHK 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_DCENACTCHK 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_DCENACTCHK INTO WA_DCENACTCHK.


*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_DCENACTCHK_STR, 
OBJNAME_OK TYPE STRING,
EXIS_ENQU TYPE STRING,
NAME_EQUHD TYPE STRING,
AGGTYPE_OK TYPE STRING,
NAME_EQUBT TYPE STRING,
PRIMTABOK TYPE STRING,
POSITIONOK TYPE STRING,
TABLEACTIV TYPE STRING,
BT_DIFFER TYPE STRING,
ENMODUS_OK TYPE STRING,
MODI_IN_BT TYPE STRING,
EXIS_MODUS TYPE STRING,
ALL_MODI TYPE STRING,
BASTAB_TYP TYPE STRING,
ABAP_LANG_VERS_USED_OBJ TYPE STRING,
NAME_EQUFD TYPE STRING,
EXIS_PARAM TYPE STRING,
PARAMINBT TYPE STRING,
FIELD2PARA TYPE STRING,
ENQPARANAM TYPE STRING,
NAMXUNDERS TYPE STRING,
NAMMODEUNS TYPE STRING,
NAM_DIFFER TYPE STRING,
NAMNOTBAST TYPE STRING,
NAMFORBIDD TYPE STRING,
PARAMISKEY TYPE STRING,
PARANOTCHK TYPE STRING,
FORKEYDIRE TYPE STRING,
FATHEREXIS TYPE STRING,
EXISFORKEY TYPE STRING,
FORFIINEQT TYPE STRING,
FORFIINBTB TYPE STRING,
FORFIUNDER TYPE STRING,
FORFIDISTI TYPE STRING,
FORFIKEYFI TYPE STRING,
ARGUM_LENG TYPE STRING,
PARAMMODUS TYPE STRING,
ENFIELDTYP TYPE STRING,
IFTOLARGE TYPE STRING,
FIELDTYPOK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DCENACTCHK_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_DCENACTCHK_STR-OBJNAME_OK sy-vline 
WA_DCENACTCHK_STR-EXIS_ENQU sy-vline 
WA_DCENACTCHK_STR-NAME_EQUHD sy-vline 
WA_DCENACTCHK_STR-AGGTYPE_OK sy-vline 
WA_DCENACTCHK_STR-NAME_EQUBT sy-vline 
WA_DCENACTCHK_STR-PRIMTABOK sy-vline 
WA_DCENACTCHK_STR-POSITIONOK sy-vline 
WA_DCENACTCHK_STR-TABLEACTIV sy-vline 
WA_DCENACTCHK_STR-BT_DIFFER sy-vline 
WA_DCENACTCHK_STR-ENMODUS_OK sy-vline 
WA_DCENACTCHK_STR-MODI_IN_BT sy-vline 
WA_DCENACTCHK_STR-EXIS_MODUS sy-vline 
WA_DCENACTCHK_STR-ALL_MODI sy-vline 
WA_DCENACTCHK_STR-BASTAB_TYP sy-vline 
WA_DCENACTCHK_STR-ABAP_LANG_VERS_USED_OBJ sy-vline 
WA_DCENACTCHK_STR-NAME_EQUFD sy-vline 
WA_DCENACTCHK_STR-EXIS_PARAM sy-vline 
WA_DCENACTCHK_STR-PARAMINBT sy-vline 
WA_DCENACTCHK_STR-FIELD2PARA sy-vline 
WA_DCENACTCHK_STR-ENQPARANAM sy-vline 
WA_DCENACTCHK_STR-NAMXUNDERS sy-vline 
WA_DCENACTCHK_STR-NAMMODEUNS sy-vline 
WA_DCENACTCHK_STR-NAM_DIFFER sy-vline 
WA_DCENACTCHK_STR-NAMNOTBAST sy-vline 
WA_DCENACTCHK_STR-NAMFORBIDD sy-vline 
WA_DCENACTCHK_STR-PARAMISKEY sy-vline 
WA_DCENACTCHK_STR-PARANOTCHK sy-vline 
WA_DCENACTCHK_STR-FORKEYDIRE sy-vline 
WA_DCENACTCHK_STR-FATHEREXIS sy-vline 
WA_DCENACTCHK_STR-EXISFORKEY sy-vline 
WA_DCENACTCHK_STR-FORFIINEQT sy-vline 
WA_DCENACTCHK_STR-FORFIINBTB sy-vline 
WA_DCENACTCHK_STR-FORFIUNDER sy-vline 
WA_DCENACTCHK_STR-FORFIDISTI sy-vline 
WA_DCENACTCHK_STR-FORFIKEYFI sy-vline 
WA_DCENACTCHK_STR-ARGUM_LENG sy-vline 
WA_DCENACTCHK_STR-PARAMMODUS sy-vline 
WA_DCENACTCHK_STR-ENFIELDTYP sy-vline 
WA_DCENACTCHK_STR-IFTOLARGE sy-vline 
WA_DCENACTCHK_STR-FIELDTYPOK sy-vline      INTO ld_text SEPARATED BY SPACE.

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