ABAP Select data from SAP table HR99B_S_X0_CLUSTER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HR99B_S_X0_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 HR99B_S_X0_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 HR99B_S_X0_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_HR99B_S_X0_CLUSTER TYPE STANDARD TABLE OF HR99B_S_X0_CLUSTER,
      WA_HR99B_S_X0_CLUSTER TYPE HR99B_S_X0_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: <HR99B_S_X0_CLUSTER> TYPE HR99B_S_X0_CLUSTER.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HR99B_S_X0_CLUSTER.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HR99B_S_X0_CLUSTER
  INTO TABLE IT_HR99B_S_X0_CLUSTER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HR99B_S_X0_CLUSTER
*  INTO TABLE @DATA(IT_HR99B_S_X0_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_HR99B_S_X0_CLUSTER INDEX 1 INTO DATA(WA_HR99B_S_X0_CLUSTER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HR99B_S_X0_CLUSTER ASSIGNING <HR99B_S_X0_CLUSTER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HR99B_S_X0_CLUSTER>-KEY = 1.
<HR99B_S_X0_CLUSTER>-MOLGA = 1.
<HR99B_S_X0_CLUSTER>-APPL = 1.
<HR99B_S_X0_CLUSTER>-GROUPID = 1.
<HR99B_S_X0_CLUSTER>-SUBRC = 1.

ENDLOOP.

LOOP AT IT_HR99B_S_X0_CLUSTER INTO WA_HR99B_S_X0_CLUSTER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HR99B_S_X0_CLUSTER-LINES, sy-vline,
  WA_HR99B_S_X0_CLUSTER-LIN, sy-vline,
  WA_HR99B_S_X0_CLUSTER-VERSION, sy-vline,
  WA_HR99B_S_X0_CLUSTER-SAPRL, sy-vline,
  WA_HR99B_S_X0_CLUSTER-NUMBER, sy-vline,
  WA_HR99B_S_X0_CLUSTER-UNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HR99B_S_X0_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_HR99B_S_X0_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_HR99B_S_X0_CLUSTER INTO WA_HR99B_S_X0_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_HR99B_S_X0_CLUSTER_STR, 
KEY TYPE STRING,
MOLGA TYPE STRING,
APPL TYPE STRING,
GROUPID TYPE STRING,
SUBRC TYPE STRING,
LINES TYPE STRING,
LIN TYPE STRING,
VERSION TYPE STRING,
SAPRL TYPE STRING,
NUMBER TYPE STRING,
UNAME TYPE STRING,
DATUM TYPE STRING,
UZEIT TYPE STRING,
PGMID TYPE STRING,
SCHEM TYPE STRING,
X1DIR TYPE STRING,
ARC_GROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HR99B_S_X0_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_HR99B_S_X0_CLUSTER_STR-KEY sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-MOLGA sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-APPL sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-GROUPID sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-SUBRC sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-LINES sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-LIN sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-VERSION sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-SAPRL sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-NUMBER sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-UNAME sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-DATUM sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-UZEIT sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-PGMID sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-SCHEM sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-X1DIR sy-vline 
WA_HR99B_S_X0_CLUSTER_STR-ARC_GROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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