ABAP Select data from SAP table /BSNAGT/CV_ALRTR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /BSNAGT/CV_ALRTR 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 /BSNAGT/CV_ALRTR. 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 /BSNAGT/CV_ALRTR 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_/BSNAGT/CV_ALRTR TYPE STANDARD TABLE OF /BSNAGT/CV_ALRTR,
      WA_/BSNAGT/CV_ALRTR TYPE /BSNAGT/CV_ALRTR,
      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: </BSNAGT/CV_ALRTR> TYPE /BSNAGT/CV_ALRTR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /BSNAGT/CV_ALRTR
  INTO TABLE IT_/BSNAGT/CV_ALRTR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /BSNAGT/CV_ALRTR
*  INTO TABLE @DATA(IT_/BSNAGT/CV_ALRTR2).
*--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_/BSNAGT/CV_ALRTR INDEX 1 INTO DATA(WA_/BSNAGT/CV_ALRTR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/BSNAGT/CV_ALRTR ASSIGNING </BSNAGT/CV_ALRTR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</BSNAGT/CV_ALRTR>-MANDT = 1.
</BSNAGT/CV_ALRTR>-GUID = 1.
</BSNAGT/CV_ALRTR>-ALERTCATEGORY = 1.
</BSNAGT/CV_ALRTR>-STATUS = 1.
</BSNAGT/CV_ALRTR>-STATUSDESC = 1.

ENDLOOP.

LOOP AT IT_/BSNAGT/CV_ALRTR INTO WA_/BSNAGT/CV_ALRTR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/BSNAGT/CV_ALRTR-STATUSINDEX, sy-vline,
  WA_/BSNAGT/CV_ALRTR-MESSAGEGUID, sy-vline,
  WA_/BSNAGT/CV_ALRTR-FIRSTFOUNDDATE, sy-vline,
  WA_/BSNAGT/CV_ALRTR-FIRSTFOUNDTIME, sy-vline,
  WA_/BSNAGT/CV_ALRTR-LASTFOUNDDATE, sy-vline,
  WA_/BSNAGT/CV_ALRTR-LASTFOUNDTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/BSNAGT/CV_ALRTR 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_/BSNAGT/CV_ALRTR 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_/BSNAGT/CV_ALRTR INTO WA_/BSNAGT/CV_ALRTR.


*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_/BSNAGT/CV_ALRTR_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
ALERTCATEGORY TYPE STRING,
STATUS TYPE STRING,
STATUSDESC TYPE STRING,
STATUSINDEX TYPE STRING,
MESSAGEGUID TYPE STRING,
FIRSTFOUNDDATE TYPE STRING,
FIRSTFOUNDTIME TYPE STRING,
LASTFOUNDDATE TYPE STRING,
LASTFOUNDTIME TYPE STRING,
LASTCHECKEDDATE TYPE STRING,
LASTCHECKEDTIME TYPE STRING,
RESOLVEDDATE TYPE STRING,
RESOLVEDTIME TYPE STRING,
COUNTFOUND TYPE STRING,
EXPIRATIONDATE TYPE STRING,
MESSAGETEXT TYPE STRING,
CREATEDATE TYPE STRING,
CREATETIME TYPE STRING,
CHANGEDATE TYPE STRING,
CHANGETIME TYPE STRING,
MESSAGEID TYPE STRING,
MESSAGETYPE TYPE STRING,
ALERTWEIGHT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/BSNAGT/CV_ALRTR_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_/BSNAGT/CV_ALRTR_STR-MANDT sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-GUID sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-ALERTCATEGORY sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-STATUS sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-STATUSDESC sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-STATUSINDEX sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-MESSAGEGUID sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-FIRSTFOUNDDATE sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-FIRSTFOUNDTIME sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-LASTFOUNDDATE sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-LASTFOUNDTIME sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-LASTCHECKEDDATE sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-LASTCHECKEDTIME sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-RESOLVEDDATE sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-RESOLVEDTIME sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-COUNTFOUND sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-EXPIRATIONDATE sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-MESSAGETEXT sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-CREATEDATE sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-CREATETIME sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-CHANGEDATE sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-CHANGETIME sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-MESSAGEID sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-MESSAGETYPE sy-vline 
WA_/BSNAGT/CV_ALRTR_STR-ALERTWEIGHT sy-vline      INTO ld_text SEPARATED BY SPACE.

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