ABAP Select data from SAP table BEL_D_EVENTQ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BEL_D_EVENTQ
*  INTO TABLE @DATA(IT_BEL_D_EVENTQ2).
*--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_BEL_D_EVENTQ INDEX 1 INTO DATA(WA_BEL_D_EVENTQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BEL_D_EVENTQ>-CLIENT = 1.
<BEL_D_EVENTQ>-EVT_GUID = 1.
<BEL_D_EVENTQ>-EVENT_ID = 1.
<BEL_D_EVENTQ>-TSTAMP = 1.
<BEL_D_EVENTQ>-EVENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BEL_D_EVENTQ-OBJCATEG, sy-vline,
  WA_BEL_D_EVENTQ-OBJTYPE, sy-vline,
  WA_BEL_D_EVENTQ-OBJKEY, sy-vline,
  WA_BEL_D_EVENTQ-CONT_EXIST, sy-vline,
  WA_BEL_D_EVENTQ-CREA_DATE, sy-vline,
  WA_BEL_D_EVENTQ-CREA_TIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BEL_D_EVENTQ 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_BEL_D_EVENTQ 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_BEL_D_EVENTQ INTO WA_BEL_D_EVENTQ.


*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.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_BEL_D_EVENTQ-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BEL_D_EVENTQ-LANGU.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_BEL_D_EVENTQ_STR, 
CLIENT TYPE STRING,
EVT_GUID TYPE STRING,
EVENT_ID TYPE STRING,
TSTAMP TYPE STRING,
EVENT TYPE STRING,
OBJCATEG TYPE STRING,
OBJTYPE TYPE STRING,
OBJKEY TYPE STRING,
CONT_EXIST TYPE STRING,
CREA_DATE TYPE STRING,
CREA_TIME TYPE STRING,
CREA_STMP TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
LANGU TYPE STRING,
COBJTYPE TYPE STRING,
REQUESTER TYPE STRING,
TCODE TYPE STRING,
SOURCE_MANDT TYPE STRING,
SOURCE_SYSID TYPE STRING,
TRANS_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BEL_D_EVENTQ_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_BEL_D_EVENTQ_STR-CLIENT sy-vline 
WA_BEL_D_EVENTQ_STR-EVT_GUID sy-vline 
WA_BEL_D_EVENTQ_STR-EVENT_ID sy-vline 
WA_BEL_D_EVENTQ_STR-TSTAMP sy-vline 
WA_BEL_D_EVENTQ_STR-EVENT sy-vline 
WA_BEL_D_EVENTQ_STR-OBJCATEG sy-vline 
WA_BEL_D_EVENTQ_STR-OBJTYPE sy-vline 
WA_BEL_D_EVENTQ_STR-OBJKEY sy-vline 
WA_BEL_D_EVENTQ_STR-CONT_EXIST sy-vline 
WA_BEL_D_EVENTQ_STR-CREA_DATE sy-vline 
WA_BEL_D_EVENTQ_STR-CREA_TIME sy-vline 
WA_BEL_D_EVENTQ_STR-CREA_STMP sy-vline 
WA_BEL_D_EVENTQ_STR-OTYPE sy-vline 
WA_BEL_D_EVENTQ_STR-OBJID sy-vline 
WA_BEL_D_EVENTQ_STR-LANGU sy-vline 
WA_BEL_D_EVENTQ_STR-COBJTYPE sy-vline 
WA_BEL_D_EVENTQ_STR-REQUESTER sy-vline 
WA_BEL_D_EVENTQ_STR-TCODE sy-vline 
WA_BEL_D_EVENTQ_STR-SOURCE_MANDT sy-vline 
WA_BEL_D_EVENTQ_STR-SOURCE_SYSID sy-vline 
WA_BEL_D_EVENTQ_STR-TRANS_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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