ABAP Select data from SAP table DCVIEWACT 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 DCVIEWACT 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 DCVIEWACT. 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 DCVIEWACT 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_DCVIEWACT TYPE STANDARD TABLE OF DCVIEWACT,
      WA_DCVIEWACT TYPE DCVIEWACT,
      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: <DCVIEWACT> TYPE DCVIEWACT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCVIEWACT
*  INTO TABLE @DATA(IT_DCVIEWACT2).
*--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_DCVIEWACT INDEX 1 INTO DATA(WA_DCVIEWACT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCVIEWACT>-GENVIEWTAB = 1.
<DCVIEWACT>-CHKACTOK = 1.
<DCVIEWACT>-TABACTMODE = 1.
<DCVIEWACT>-NTABPUTST = 1.
<DCVIEWACT>-GENHVREPO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCVIEWACT-REFFIELD, sy-vline,
  WA_DCVIEWACT-GENFRK, sy-vline,
  WA_DCVIEWACT-GENTBSH, sy-vline,
  WA_DCVIEWACT-BUFFERUPD, sy-vline,
  WA_DCVIEWACT-DBACTCRE, sy-vline,
  WA_DCVIEWACT-DBACTDEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCVIEWACT 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_DCVIEWACT 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_DCVIEWACT INTO WA_DCVIEWACT.


*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_DCVIEWACT_STR, 
GENVIEWTAB TYPE STRING,
CHKACTOK TYPE STRING,
TABACTMODE TYPE STRING,
NTABPUTST TYPE STRING,
GENHVREPO TYPE STRING,
REFFIELD TYPE STRING,
GENFRK TYPE STRING,
GENTBSH TYPE STRING,
BUFFERUPD TYPE STRING,
DBACTCRE TYPE STRING,
DBACTDEL TYPE STRING,
DBACTCNV TYPE STRING,
CHECKCNV TYPE STRING,
IMMEDIATE TYPE STRING,
AUTHCH TYPE STRING,
PUT_STATE TYPE STRING,
COMMIT TYPE STRING,
DEPMAXSEV TYPE STRING,
DEPMINSEV TYPE STRING,
DEPIMMACT TYPE STRING,
DEPSELECT TYPE STRING,
DEPNODELTA TYPE STRING,
NOACTFLUPD TYPE STRING,
HEADERCHK TYPE STRING,
FIELDCHK TYPE STRING,
BASETABCHK TYPE STRING,
SELCONDCHK TYPE STRING,
JOINCHK TYPE STRING,
TIMER_ON TYPE STRING,
DEBUG_INFO TYPE STRING,
LOGGINGUPD TYPE STRING,
DBACTSYN TYPE STRING,
WEAK_DDLPARSING TYPE STRING,
PRELEVEL TYPE STRING,
NONAMECHK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DCVIEWACT_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_DCVIEWACT_STR-GENVIEWTAB sy-vline 
WA_DCVIEWACT_STR-CHKACTOK sy-vline 
WA_DCVIEWACT_STR-TABACTMODE sy-vline 
WA_DCVIEWACT_STR-NTABPUTST sy-vline 
WA_DCVIEWACT_STR-GENHVREPO sy-vline 
WA_DCVIEWACT_STR-REFFIELD sy-vline 
WA_DCVIEWACT_STR-GENFRK sy-vline 
WA_DCVIEWACT_STR-GENTBSH sy-vline 
WA_DCVIEWACT_STR-BUFFERUPD sy-vline 
WA_DCVIEWACT_STR-DBACTCRE sy-vline 
WA_DCVIEWACT_STR-DBACTDEL sy-vline 
WA_DCVIEWACT_STR-DBACTCNV sy-vline 
WA_DCVIEWACT_STR-CHECKCNV sy-vline 
WA_DCVIEWACT_STR-IMMEDIATE sy-vline 
WA_DCVIEWACT_STR-AUTHCH sy-vline 
WA_DCVIEWACT_STR-PUT_STATE sy-vline 
WA_DCVIEWACT_STR-COMMIT sy-vline 
WA_DCVIEWACT_STR-DEPMAXSEV sy-vline 
WA_DCVIEWACT_STR-DEPMINSEV sy-vline 
WA_DCVIEWACT_STR-DEPIMMACT sy-vline 
WA_DCVIEWACT_STR-DEPSELECT sy-vline 
WA_DCVIEWACT_STR-DEPNODELTA sy-vline 
WA_DCVIEWACT_STR-NOACTFLUPD sy-vline 
WA_DCVIEWACT_STR-HEADERCHK sy-vline 
WA_DCVIEWACT_STR-FIELDCHK sy-vline 
WA_DCVIEWACT_STR-BASETABCHK sy-vline 
WA_DCVIEWACT_STR-SELCONDCHK sy-vline 
WA_DCVIEWACT_STR-JOINCHK sy-vline 
WA_DCVIEWACT_STR-TIMER_ON sy-vline 
WA_DCVIEWACT_STR-DEBUG_INFO sy-vline 
WA_DCVIEWACT_STR-LOGGINGUPD sy-vline 
WA_DCVIEWACT_STR-DBACTSYN sy-vline 
WA_DCVIEWACT_STR-WEAK_DDLPARSING sy-vline 
WA_DCVIEWACT_STR-PRELEVEL sy-vline 
WA_DCVIEWACT_STR-NONAMECHK sy-vline      INTO ld_text SEPARATED BY SPACE.

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