ABAP Select data from SAP table ISTBED into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISTBED 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 ISTBED. 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 ISTBED 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_ISTBED TYPE STANDARD TABLE OF ISTBED,
      WA_ISTBED TYPE ISTBED,
      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: <ISTBED> TYPE ISTBED.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISTBED
*  INTO TABLE @DATA(IT_ISTBED2).
*--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_ISTBED INDEX 1 INTO DATA(WA_ISTBED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISTBED>-MANDT = 1.
<ISTBED>-BEDID = 1.
<ISTBED>-BEDZL = 1.
<ISTBED>-CANUM = 1.
<ISTBED>-RMZHL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISTBED-RUECK, sy-vline,
  WA_ISTBED-AUFPL, sy-vline,
  WA_ISTBED-APLZL, sy-vline,
  WA_ISTBED-ISTRUEST, sy-vline,
  WA_ISTBED-ISTBEARB, sy-vline,
  WA_ISTBED-ISTABRUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISTBED 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_ISTBED 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_ISTBED INTO WA_ISTBED.


*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 CUNIT, internal->external for field KEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISTBED-KEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTBED-KEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BED_EINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISTBED-BED_EINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTBED-BED_EINH.
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_ISTBED_STR, 
MANDT TYPE STRING,
BEDID TYPE STRING,
BEDZL TYPE STRING,
CANUM TYPE STRING,
RMZHL TYPE STRING,
RUECK TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
ISTRUEST TYPE STRING,
ISTBEARB TYPE STRING,
ISTABRUE TYPE STRING,
KEINH TYPE STRING,
IARBID TYPE STRING,
KAPID TYPE STRING,
CANUMF TYPE STRING,
SPLIT TYPE STRING,
PERNR TYPE STRING,
TYPKZ TYPE STRING,
KOPF_RUECK TYPE STRING,
ISDD TYPE STRING,
ISDZ TYPE STRING,
IEDD TYPE STRING,
IEDZ TYPE STRING,
FLG_NO_SETUP TYPE STRING,
FLG_NO_TEAR TYPE STRING,
KPVER TYPE STRING,
BED_MENGE TYPE STRING,
BED_EINH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISTBED_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_ISTBED_STR-MANDT sy-vline 
WA_ISTBED_STR-BEDID sy-vline 
WA_ISTBED_STR-BEDZL sy-vline 
WA_ISTBED_STR-CANUM sy-vline 
WA_ISTBED_STR-RMZHL sy-vline 
WA_ISTBED_STR-RUECK sy-vline 
WA_ISTBED_STR-AUFPL sy-vline 
WA_ISTBED_STR-APLZL sy-vline 
WA_ISTBED_STR-ISTRUEST sy-vline 
WA_ISTBED_STR-ISTBEARB sy-vline 
WA_ISTBED_STR-ISTABRUE sy-vline 
WA_ISTBED_STR-KEINH sy-vline 
WA_ISTBED_STR-IARBID sy-vline 
WA_ISTBED_STR-KAPID sy-vline 
WA_ISTBED_STR-CANUMF sy-vline 
WA_ISTBED_STR-SPLIT sy-vline 
WA_ISTBED_STR-PERNR sy-vline 
WA_ISTBED_STR-TYPKZ sy-vline 
WA_ISTBED_STR-KOPF_RUECK sy-vline 
WA_ISTBED_STR-ISDD sy-vline 
WA_ISTBED_STR-ISDZ sy-vline 
WA_ISTBED_STR-IEDD sy-vline 
WA_ISTBED_STR-IEDZ sy-vline 
WA_ISTBED_STR-FLG_NO_SETUP sy-vline 
WA_ISTBED_STR-FLG_NO_TEAR sy-vline 
WA_ISTBED_STR-KPVER sy-vline 
WA_ISTBED_STR-BED_MENGE sy-vline 
WA_ISTBED_STR-BED_EINH sy-vline      INTO ld_text SEPARATED BY SPACE.

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