ABAP Select data from SAP table DBA_VIEW_SYSTEM_DETAIL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DBA_VIEW_SYSTEM_DETAIL
*  INTO TABLE @DATA(IT_DBA_VIEW_SYSTEM_DETAIL2).
*--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_DBA_VIEW_SYSTEM_DETAIL INDEX 1 INTO DATA(WA_DBA_VIEW_SYSTEM_DETAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DBA_VIEW_SYSTEM_DETAIL>-CURRENT_ENTRY = 1.
<DBA_VIEW_SYSTEM_DETAIL>-STATUS_ICON = 1.
<DBA_VIEW_SYSTEM_DETAIL>-SYSID = 1.
<DBA_VIEW_SYSTEM_DETAIL>-SAPREL = 1.
<DBA_VIEW_SYSTEM_DETAIL>-DBREL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DBA_VIEW_SYSTEM_DETAIL-RFCDEST, sy-vline,
  WA_DBA_VIEW_SYSTEM_DETAIL-DBHOST, sy-vline,
  WA_DBA_VIEW_SYSTEM_DETAIL-SCHEMANAME, sy-vline,
  WA_DBA_VIEW_SYSTEM_DETAIL-ENTRYSTATE, sy-vline,
  WA_DBA_VIEW_SYSTEM_DETAIL-ENTRYTYPE, sy-vline,
  WA_DBA_VIEW_SYSTEM_DETAIL-DBCNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DBA_VIEW_SYSTEM_DETAIL 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_DBA_VIEW_SYSTEM_DETAIL 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_DBA_VIEW_SYSTEM_DETAIL INTO WA_DBA_VIEW_SYSTEM_DETAIL.


*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_DBA_VIEW_SYSTEM_DETAIL_STR, 
CURRENT_ENTRY TYPE STRING,
STATUS_ICON TYPE STRING,
SYSID TYPE STRING,
SAPREL TYPE STRING,
DBREL TYPE STRING,
RFCDEST TYPE STRING,
DBHOST TYPE STRING,
SCHEMANAME TYPE STRING,
ENTRYSTATE TYPE STRING,
ENTRYTYPE TYPE STRING,
DBCNAME TYPE STRING,
DBSYS TYPE STRING,
DB_OPSYS TYPE STRING,
COCKREL TYPE STRING,
REALSID TYPE STRING,
DBSID TYPE STRING,
RZ20_MON TYPE STRING,
HIST_MON TYPE STRING,
DESCRIPTION TYPE STRING,
CHANGEDATE TYPE STRING,
CHANGETIME TYPE STRING,
CHANGED_BY TYPE STRING,
SYSTEMTYPE TYPE STRING,
RFCDEST_2 TYPE STRING,
REMOTE_COLL TYPE STRING,
DBCON_VIA_RFC TYPE STRING,
PROMPT_USER_DATA TYPE STRING,
SLD_NAME TYPE STRING,
SLD_UPDATE TYPE STRING,
DB13C_MON TYPE STRING,
KPI_MON TYPE STRING,
LICENSE_EXT TYPE STRING,
SCHEDULER_TYPE TYPE STRING,
BACKEND_STATE TYPE STRING,
BACKEND_CHK_TIME TYPE STRING,
HIST_DBH TYPE STRING,
BACKEND_TPL_ID TYPE STRING,
LSID TYPE STRING,
AUTO_UPDATE TYPE STRING,
DBOSC_ID TYPE STRING,
DEFAULTSYS TYPE STRING,
DBSYS_IMAGE TYPE STRING,
ORALICEXTDIAG TYPE STRING,
DB_USER TYPE STRING,
LABEL_HISTMON TYPE STRING,
STATUS TYPE STRING,
DBSYS_TEXT TYPE STRING,
CB_R3_SYSTEM TYPE STRING,
RB_ENTRYTYPE_LOCAL TYPE STRING,
CROSS_SCHEMA_NAME TYPE STRING,
CROSS_SCHEMATA TYPE STRING,
RB_ENTRYTYPE_REMOTE TYPE STRING,
CB_WITH_RFCDEST TYPE STRING,
CB_WITH_DBCON TYPE STRING,
RB_APPLTYPE_OLTP TYPE STRING,
RB_APPLTYPE_OLAP TYPE STRING,
RB_APPLTYPE_LIVECACHE TYPE STRING,
REMOTE_CONNECTIONS TYPE STRING,
SELECT_LIST_TITLE TYPE STRING,
RFC_ICON TYPE STRING,
DBCON_ICON TYPE STRING,
SLD_DATE TYPE STRING,
SLD_TIME TYPE STRING,
RB_ENTRYTYPE TYPE STRING,
CB_CRITICAL_ALERTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DBA_VIEW_SYSTEM_DETAIL_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_DBA_VIEW_SYSTEM_DETAIL_STR-CURRENT_ENTRY sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-STATUS_ICON sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-SYSID sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-SAPREL sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DBREL sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-RFCDEST sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DBHOST sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-SCHEMANAME sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-ENTRYSTATE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-ENTRYTYPE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DBCNAME sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DBSYS sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DB_OPSYS sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-COCKREL sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-REALSID sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DBSID sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-RZ20_MON sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-HIST_MON sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DESCRIPTION sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-CHANGEDATE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-CHANGETIME sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-CHANGED_BY sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-SYSTEMTYPE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-RFCDEST_2 sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-REMOTE_COLL sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DBCON_VIA_RFC sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-PROMPT_USER_DATA sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-SLD_NAME sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-SLD_UPDATE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DB13C_MON sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-KPI_MON sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-LICENSE_EXT sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-SCHEDULER_TYPE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-BACKEND_STATE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-BACKEND_CHK_TIME sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-HIST_DBH sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-BACKEND_TPL_ID sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-LSID sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-AUTO_UPDATE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DBOSC_ID sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DEFAULTSYS sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DBSYS_IMAGE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-ORALICEXTDIAG sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DB_USER sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-LABEL_HISTMON sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-STATUS sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DBSYS_TEXT sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-CB_R3_SYSTEM sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-RB_ENTRYTYPE_LOCAL sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-CROSS_SCHEMA_NAME sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-CROSS_SCHEMATA sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-RB_ENTRYTYPE_REMOTE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-CB_WITH_RFCDEST sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-CB_WITH_DBCON sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-RB_APPLTYPE_OLTP sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-RB_APPLTYPE_OLAP sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-RB_APPLTYPE_LIVECACHE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-REMOTE_CONNECTIONS sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-SELECT_LIST_TITLE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-RFC_ICON sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-DBCON_ICON sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-SLD_DATE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-SLD_TIME sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-RB_ENTRYTYPE sy-vline 
WA_DBA_VIEW_SYSTEM_DETAIL_STR-CB_CRITICAL_ALERTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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