ABAP Select data from SAP table BBP_WLRA_CLUSTER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BBP_WLRA_CLUSTER
*  INTO TABLE @DATA(IT_BBP_WLRA_CLUSTER2).
*--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_BBP_WLRA_CLUSTER INDEX 1 INTO DATA(WA_BBP_WLRA_CLUSTER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BBP_WLRA_CLUSTER>-MANDT = 1.
<BBP_WLRA_CLUSTER>-RELID = 1.
<BBP_WLRA_CLUSTER>-SRTFD = 1.
<BBP_WLRA_CLUSTER>-SRTF2 = 1.
<BBP_WLRA_CLUSTER>-OBJECT_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BBP_WLRA_CLUSTER-ITEM_NUMBER, sy-vline,
  WA_BBP_WLRA_CLUSTER-OBJECT_TYPE, sy-vline,
  WA_BBP_WLRA_CLUSTER-MSGTY, sy-vline,
  WA_BBP_WLRA_CLUSTER-MSGID, sy-vline,
  WA_BBP_WLRA_CLUSTER-MSGNO, sy-vline,
  WA_BBP_WLRA_CLUSTER-MESSAGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BBP_WLRA_CLUSTER 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_BBP_WLRA_CLUSTER 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_BBP_WLRA_CLUSTER INTO WA_BBP_WLRA_CLUSTER.


*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_BBP_WLRA_CLUSTER_STR, 
MANDT TYPE STRING,
RELID TYPE STRING,
SRTFD TYPE STRING,
SRTF2 TYPE STRING,
OBJECT_ID TYPE STRING,
ITEM_NUMBER TYPE STRING,
OBJECT_TYPE TYPE STRING,
MSGTY TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MESSAGE TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
NEXT_INDEX TYPE STRING,
CLUSTR TYPE STRING,
CLUSTD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BBP_WLRA_CLUSTER_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_BBP_WLRA_CLUSTER_STR-MANDT sy-vline 
WA_BBP_WLRA_CLUSTER_STR-RELID sy-vline 
WA_BBP_WLRA_CLUSTER_STR-SRTFD sy-vline 
WA_BBP_WLRA_CLUSTER_STR-SRTF2 sy-vline 
WA_BBP_WLRA_CLUSTER_STR-OBJECT_ID sy-vline 
WA_BBP_WLRA_CLUSTER_STR-ITEM_NUMBER sy-vline 
WA_BBP_WLRA_CLUSTER_STR-OBJECT_TYPE sy-vline 
WA_BBP_WLRA_CLUSTER_STR-MSGTY sy-vline 
WA_BBP_WLRA_CLUSTER_STR-MSGID sy-vline 
WA_BBP_WLRA_CLUSTER_STR-MSGNO sy-vline 
WA_BBP_WLRA_CLUSTER_STR-MESSAGE sy-vline 
WA_BBP_WLRA_CLUSTER_STR-MSGV1 sy-vline 
WA_BBP_WLRA_CLUSTER_STR-MSGV2 sy-vline 
WA_BBP_WLRA_CLUSTER_STR-MSGV3 sy-vline 
WA_BBP_WLRA_CLUSTER_STR-MSGV4 sy-vline 
WA_BBP_WLRA_CLUSTER_STR-NEXT_INDEX sy-vline 
WA_BBP_WLRA_CLUSTER_STR-CLUSTR sy-vline 
WA_BBP_WLRA_CLUSTER_STR-CLUSTD sy-vline      INTO ld_text SEPARATED BY SPACE.

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