ABAP Select data from SAP table DBA_VIEW_ALERT_MSG_LOG 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_ALERT_MSG_LOG 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_ALERT_MSG_LOG. 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_ALERT_MSG_LOG 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_ALERT_MSG_LOG TYPE STANDARD TABLE OF DBA_VIEW_ALERT_MSG_LOG,
      WA_DBA_VIEW_ALERT_MSG_LOG TYPE DBA_VIEW_ALERT_MSG_LOG,
      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_ALERT_MSG_LOG> TYPE DBA_VIEW_ALERT_MSG_LOG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DBA_VIEW_ALERT_MSG_LOG
*  INTO TABLE @DATA(IT_DBA_VIEW_ALERT_MSG_LOG2).
*--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_ALERT_MSG_LOG INDEX 1 INTO DATA(WA_DBA_VIEW_ALERT_MSG_LOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DBA_VIEW_ALERT_MSG_LOG>-LIST = 1.
<DBA_VIEW_ALERT_MSG_LOG>-SEL_MSG = 1.
<DBA_VIEW_ALERT_MSG_LOG>-DATE = 1.
<DBA_VIEW_ALERT_MSG_LOG>-TIME = 1.
<DBA_VIEW_ALERT_MSG_LOG>-PARTITN_DISPLAY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DBA_VIEW_ALERT_MSG_LOG-COMPONENT, sy-vline,
  WA_DBA_VIEW_ALERT_MSG_LOG-OBJECT, sy-vline,
  WA_DBA_VIEW_ALERT_MSG_LOG-ATTRIBUTE, sy-vline,
  WA_DBA_VIEW_ALERT_MSG_LOG-ALRTCOLOR, sy-vline,
  WA_DBA_VIEW_ALERT_MSG_LOG-ALRTVALUE, sy-vline,
  WA_DBA_VIEW_ALERT_MSG_LOG-PARAMVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DBA_VIEW_ALERT_MSG_LOG 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_ALERT_MSG_LOG 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_ALERT_MSG_LOG INTO WA_DBA_VIEW_ALERT_MSG_LOG.


*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_ALERT_MSG_LOG_STR, 
LIST TYPE STRING,
SEL_MSG TYPE STRING,
DATE TYPE STRING,
TIME TYPE STRING,
PARTITN_DISPLAY TYPE STRING,
COMPONENT TYPE STRING,
OBJECT TYPE STRING,
ATTRIBUTE TYPE STRING,
ALRTCOLOR TYPE STRING,
ALRTVALUE TYPE STRING,
PARAMVALUE TYPE STRING,
PARAMUNIT TYPE STRING,
ALRTMSG TYPE STRING,
REACTMSG TYPE STRING,
DETAILMSG TYPE STRING,
PARTITN TYPE STRING,
COMPONENT_DISPLAY TYPE STRING,
COMPONENT TYPE STRING,
PATH TYPE STRING,
OBJECT TYPE STRING,
ATTRIBUTE TYPE STRING,
ALRTVALUE_DISPLAY TYPE STRING,
ALRTVALUE TYPE STRING,
PARAMVALUE TYPE STRING,
PARAMUNIT_DISPLAY TYPE STRING,
OPERATOR_DISPLAY TYPE STRING,
PARAMLIST TYPE STRING,
ALRTTIME TYPE STRING,
DATE TYPE STRING,
TIME TYPE STRING,
DATE TYPE STRING,
TIME TYPE STRING,
ALRTMSG TYPE STRING,
REACTMSG TYPE STRING,
SELECTION TYPE STRING,
COMMON TYPE STRING,
COMPONENT_DISPLAY TYPE STRING,
COMPONENT TYPE STRING,
OBJECT TYPE STRING,
ATTRIBUTE TYPE STRING,
COMPONENT_LIST TYPE STRING,
ALRTVALUE_DISPLAY TYPE STRING,
VALUE TYPE STRING,
ALRTVALUE TYPE STRING,
TIMESTAMP TYPE STRING,
DATE TYPE STRING,
TIME TYPE STRING,
ALVAL_LIST TYPE STRING,
PREV_SELECTION TYPE STRING,
COMMON TYPE STRING,
COMPONENT_DISPLAY TYPE STRING,
COMPONENT TYPE STRING,
OBJECT TYPE STRING,
ATTRIBUTE TYPE STRING,
COMPONENT_LIST TYPE STRING,
ALRTVALUE_DISPLAY TYPE STRING,
VALUE TYPE STRING,
ALRTVALUE TYPE STRING,
TIMESTAMP TYPE STRING,
DATE TYPE STRING,
TIME TYPE STRING,
ALVAL_LIST TYPE STRING,
SUM_TOTAL TYPE STRING,
SUM_PERFORMANCE TYPE STRING,
SUM_BACKUP TYPE STRING,
SUM_JOBS TYPE STRING,
SUM_SPACE TYPE STRING,
SUM_HEALTH TYPE STRING,
SUM_CHECK TYPE STRING,
SUM_SELF TYPE STRING,
SUM_USER TYPE STRING,
SUM_CONSISTENCY TYPE STRING,
SUM_ALRT_GREEN TYPE STRING,
SUM_ALRT_YELLOW TYPE STRING,
SUM_ALRT_RED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DBA_VIEW_ALERT_MSG_LOG_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_ALERT_MSG_LOG_STR-LIST sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SEL_MSG sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-DATE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-TIME sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-PARTITN_DISPLAY sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMPONENT sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-OBJECT sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ATTRIBUTE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTCOLOR sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTVALUE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-PARAMVALUE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-PARAMUNIT sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTMSG sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-REACTMSG sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-DETAILMSG sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-PARTITN sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMPONENT_DISPLAY sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMPONENT sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-PATH sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-OBJECT sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ATTRIBUTE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTVALUE_DISPLAY sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTVALUE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-PARAMVALUE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-PARAMUNIT_DISPLAY sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-OPERATOR_DISPLAY sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-PARAMLIST sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTTIME sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-DATE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-TIME sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-DATE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-TIME sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTMSG sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-REACTMSG sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SELECTION sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMMON sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMPONENT_DISPLAY sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMPONENT sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-OBJECT sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ATTRIBUTE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMPONENT_LIST sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTVALUE_DISPLAY sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-VALUE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTVALUE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-TIMESTAMP sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-DATE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-TIME sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALVAL_LIST sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-PREV_SELECTION sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMMON sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMPONENT_DISPLAY sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMPONENT sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-OBJECT sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ATTRIBUTE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-COMPONENT_LIST sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTVALUE_DISPLAY sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-VALUE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALRTVALUE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-TIMESTAMP sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-DATE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-TIME sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-ALVAL_LIST sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_TOTAL sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_PERFORMANCE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_BACKUP sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_JOBS sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_SPACE sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_HEALTH sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_CHECK sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_SELF sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_USER sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_CONSISTENCY sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_ALRT_GREEN sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_ALRT_YELLOW sy-vline 
WA_DBA_VIEW_ALERT_MSG_LOG_STR-SUM_ALRT_RED sy-vline      INTO ld_text SEPARATED BY SPACE.

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