ABAP Select data from SAP table DCTABLACT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCTABLACT
*  INTO TABLE @DATA(IT_DCTABLACT2).
*--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_DCTABLACT INDEX 1 INTO DATA(WA_DCTABLACT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCTABLACT>-SETLEVEL = 1.
<DCTABLACT>-ACTOK = 1.
<DCTABLACT>-LOCKACT = 1.
<DCTABLACT>-TABLGET = 1.
<DCTABLACT>-ANLVER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCTABLACT-SQLTGET, sy-vline,
  WA_DCTABLACT-EXPAND, sy-vline,
  WA_DCTABLACT-PREPARE, sy-vline,
  WA_DCTABLACT-TABLCHK, sy-vline,
  WA_DCTABLACT-TBHDCHK, sy-vline,
  WA_DCTABLACT-TBIXCHK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCTABLACT 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_DCTABLACT 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_DCTABLACT INTO WA_DCTABLACT.


*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_DCTABLACT_STR, 
SETLEVEL TYPE STRING,
ACTOK TYPE STRING,
LOCKACT TYPE STRING,
TABLGET TYPE STRING,
ANLVER TYPE STRING,
SQLTGET TYPE STRING,
EXPAND TYPE STRING,
PREPARE TYPE STRING,
TABLCHK TYPE STRING,
TBHDCHK TYPE STRING,
TBIXCHK TYPE STRING,
TABTCHK TYPE STRING,
TBDEPCHK TYPE STRING,
TBSHCHK TYPE STRING,
TBVICHK TYPE STRING,
SHDEPCHK TYPE STRING,
NTABCMP TYPE STRING,
ANLRES TYPE STRING,
SETTMST TYPE STRING,
TABLPUT TYPE STRING,
PUTCTRL TYPE STRING,
PUTSTATE TYPE STRING,
NTABSTATE TYPE STRING,
DB_AUTH TYPE STRING,
EXCOMMIT TYPE STRING,
DEPTABS TYPE STRING,
REFPROT TYPE STRING,
TIMER_ON TYPE STRING,
MULTIPLEX TYPE STRING,
UPGRMODE TYPE STRING,
TBCHGCMP TYPE STRING,
TBVIACT TYPE STRING,
SHDEPACT TYPE STRING,
ENDEPACT TYPE STRING,
REFCHK TYPE STRING,
OFFSCLCNV TYPE STRING,
PRELEVEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DCTABLACT_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_DCTABLACT_STR-SETLEVEL sy-vline 
WA_DCTABLACT_STR-ACTOK sy-vline 
WA_DCTABLACT_STR-LOCKACT sy-vline 
WA_DCTABLACT_STR-TABLGET sy-vline 
WA_DCTABLACT_STR-ANLVER sy-vline 
WA_DCTABLACT_STR-SQLTGET sy-vline 
WA_DCTABLACT_STR-EXPAND sy-vline 
WA_DCTABLACT_STR-PREPARE sy-vline 
WA_DCTABLACT_STR-TABLCHK sy-vline 
WA_DCTABLACT_STR-TBHDCHK sy-vline 
WA_DCTABLACT_STR-TBIXCHK sy-vline 
WA_DCTABLACT_STR-TABTCHK sy-vline 
WA_DCTABLACT_STR-TBDEPCHK sy-vline 
WA_DCTABLACT_STR-TBSHCHK sy-vline 
WA_DCTABLACT_STR-TBVICHK sy-vline 
WA_DCTABLACT_STR-SHDEPCHK sy-vline 
WA_DCTABLACT_STR-NTABCMP sy-vline 
WA_DCTABLACT_STR-ANLRES sy-vline 
WA_DCTABLACT_STR-SETTMST sy-vline 
WA_DCTABLACT_STR-TABLPUT sy-vline 
WA_DCTABLACT_STR-PUTCTRL sy-vline 
WA_DCTABLACT_STR-PUTSTATE sy-vline 
WA_DCTABLACT_STR-NTABSTATE sy-vline 
WA_DCTABLACT_STR-DB_AUTH sy-vline 
WA_DCTABLACT_STR-EXCOMMIT sy-vline 
WA_DCTABLACT_STR-DEPTABS sy-vline 
WA_DCTABLACT_STR-REFPROT sy-vline 
WA_DCTABLACT_STR-TIMER_ON sy-vline 
WA_DCTABLACT_STR-MULTIPLEX sy-vline 
WA_DCTABLACT_STR-UPGRMODE sy-vline 
WA_DCTABLACT_STR-TBCHGCMP sy-vline 
WA_DCTABLACT_STR-TBVIACT sy-vline 
WA_DCTABLACT_STR-SHDEPACT sy-vline 
WA_DCTABLACT_STR-ENDEPACT sy-vline 
WA_DCTABLACT_STR-REFCHK sy-vline 
WA_DCTABLACT_STR-OFFSCLCNV sy-vline 
WA_DCTABLACT_STR-PRELEVEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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