ABAP Select data from SAP table BEL_D_EVENT 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_EVENT 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_EVENT. 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_EVENT 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_EVENT TYPE STANDARD TABLE OF BEL_D_EVENT,
      WA_BEL_D_EVENT TYPE BEL_D_EVENT,
      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_EVENT> TYPE BEL_D_EVENT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BEL_D_EVENT
*  INTO TABLE @DATA(IT_BEL_D_EVENT2).
*--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_EVENT INDEX 1 INTO DATA(WA_BEL_D_EVENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BEL_D_EVENT>-MANDT = 1.
<BEL_D_EVENT>-EVENT_GUID = 1.
<BEL_D_EVENT>-BO_TYPE = 1.
<BEL_D_EVENT>-OBJ_KEY = 1.
<BEL_D_EVENT>-OBJECT_NODE_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BEL_D_EVENT-BO_TASK, sy-vline,
  WA_BEL_D_EVENT-OBJECT_NODE_ID, sy-vline,
  WA_BEL_D_EVENT-KEY1, sy-vline,
  WA_BEL_D_EVENT-KEY2, sy-vline,
  WA_BEL_D_EVENT-KEY3, sy-vline,
  WA_BEL_D_EVENT-KEY4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BEL_D_EVENT 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_EVENT 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_EVENT INTO WA_BEL_D_EVENT.


*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 ALPHA, internal->external for field SOURCE_SYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BEL_D_EVENT-SOURCE_SYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BEL_D_EVENT-SOURCE_SYSTEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field KPI_DUR_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BEL_D_EVENT-KPI_DUR_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BEL_D_EVENT-KPI_DUR_UNIT.
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_EVENT_STR, 
MANDT TYPE STRING,
EVENT_GUID TYPE STRING,
BO_TYPE TYPE STRING,
OBJ_KEY TYPE STRING,
OBJECT_NODE_TYPE TYPE STRING,
BO_TASK TYPE STRING,
OBJECT_NODE_ID TYPE STRING,
KEY1 TYPE STRING,
KEY2 TYPE STRING,
KEY3 TYPE STRING,
KEY4 TYPE STRING,
KEY5 TYPE STRING,
KEY6 TYPE STRING,
KEY7 TYPE STRING,
KEY1_RAW TYPE STRING,
UNAME TYPE STRING,
EXEC_TIMESTAMP TYPE STRING,
EXEC_DATE TYPE STRING,
EXEC_TIME TYPE STRING,
SOURCE_SYSTEM TYPE STRING,
TRANSACTION_ID TYPE STRING,
DELETED TYPE STRING,
BO_TASK_QUAL1 TYPE STRING,
BO_TASK_QUAL_VAL1 TYPE STRING,
BO_TASK_QUAL2 TYPE STRING,
BO_TASK_QUAL_VAL2 TYPE STRING,
BO_TASK_QUAL3 TYPE STRING,
BO_TASK_QUAL_VAL3 TYPE STRING,
BO_TASK_QUAL4 TYPE STRING,
BO_TASK_QUAL_VAL4 TYPE STRING,
BO_TASK_QUAL5 TYPE STRING,
BO_TASK_QUAL_VAL5 TYPE STRING,
PRE_EVENT_GUID TYPE STRING,
KPI_DURATION TYPE STRING,
KPI_DUR_UNIT TYPE STRING,
MIGRATION_STATUS TYPE STRING,
LAST_CHANGED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BEL_D_EVENT_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_EVENT_STR-MANDT sy-vline 
WA_BEL_D_EVENT_STR-EVENT_GUID sy-vline 
WA_BEL_D_EVENT_STR-BO_TYPE sy-vline 
WA_BEL_D_EVENT_STR-OBJ_KEY sy-vline 
WA_BEL_D_EVENT_STR-OBJECT_NODE_TYPE sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK sy-vline 
WA_BEL_D_EVENT_STR-OBJECT_NODE_ID sy-vline 
WA_BEL_D_EVENT_STR-KEY1 sy-vline 
WA_BEL_D_EVENT_STR-KEY2 sy-vline 
WA_BEL_D_EVENT_STR-KEY3 sy-vline 
WA_BEL_D_EVENT_STR-KEY4 sy-vline 
WA_BEL_D_EVENT_STR-KEY5 sy-vline 
WA_BEL_D_EVENT_STR-KEY6 sy-vline 
WA_BEL_D_EVENT_STR-KEY7 sy-vline 
WA_BEL_D_EVENT_STR-KEY1_RAW sy-vline 
WA_BEL_D_EVENT_STR-UNAME sy-vline 
WA_BEL_D_EVENT_STR-EXEC_TIMESTAMP sy-vline 
WA_BEL_D_EVENT_STR-EXEC_DATE sy-vline 
WA_BEL_D_EVENT_STR-EXEC_TIME sy-vline 
WA_BEL_D_EVENT_STR-SOURCE_SYSTEM sy-vline 
WA_BEL_D_EVENT_STR-TRANSACTION_ID sy-vline 
WA_BEL_D_EVENT_STR-DELETED sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK_QUAL1 sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK_QUAL_VAL1 sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK_QUAL2 sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK_QUAL_VAL2 sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK_QUAL3 sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK_QUAL_VAL3 sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK_QUAL4 sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK_QUAL_VAL4 sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK_QUAL5 sy-vline 
WA_BEL_D_EVENT_STR-BO_TASK_QUAL_VAL5 sy-vline 
WA_BEL_D_EVENT_STR-PRE_EVENT_GUID sy-vline 
WA_BEL_D_EVENT_STR-KPI_DURATION sy-vline 
WA_BEL_D_EVENT_STR-KPI_DUR_UNIT sy-vline 
WA_BEL_D_EVENT_STR-MIGRATION_STATUS sy-vline 
WA_BEL_D_EVENT_STR-LAST_CHANGED sy-vline      INTO ld_text SEPARATED BY SPACE.

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