ABAP Select data from SAP table CRM_ISU_ERTPBILLDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRM_ISU_ERTPBILLDOC
*  INTO TABLE @DATA(IT_CRM_ISU_ERTPBILLDOC2).
*--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_CRM_ISU_ERTPBILLDOC INDEX 1 INTO DATA(WA_CRM_ISU_ERTPBILLDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRM_ISU_ERTPBILLDOC>-BELNR = 1.
<CRM_ISU_ERTPBILLDOC>-RTPINTF = 1.
<CRM_ISU_ERTPBILLDOC>-NO_ABRZEIT = 1.
<CRM_ISU_ERTPBILLDOC>-RTPINTERFACE = 1.
<CRM_ISU_ERTPBILLDOC>-TARIFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRM_ISU_ERTPBILLDOC-AB, sy-vline,
  WA_CRM_ISU_ERTPBILLDOC-BIS, sy-vline,
  WA_CRM_ISU_ERTPBILLDOC-IREGISTER, sy-vline,
  WA_CRM_ISU_ERTPBILLDOC-IOPERAND, sy-vline,
  WA_CRM_ISU_ERTPBILLDOC-EXEC, sy-vline,
  WA_CRM_ISU_ERTPBILLDOC-RTPOUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRM_ISU_ERTPBILLDOC 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_CRM_ISU_ERTPBILLDOC 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_CRM_ISU_ERTPBILLDOC INTO WA_CRM_ISU_ERTPBILLDOC.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRM_ISU_ERTPBILLDOC-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRM_ISU_ERTPBILLDOC-BELNR.
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_CRM_ISU_ERTPBILLDOC_STR, 
BELNR TYPE STRING,
RTPINTF TYPE STRING,
NO_ABRZEIT TYPE STRING,
RTPINTERFACE TYPE STRING,
TARIFNR TYPE STRING,
AB TYPE STRING,
BIS TYPE STRING,
IREGISTER TYPE STRING,
IOPERAND TYPE STRING,
EXEC TYPE STRING,
RTPOUT TYPE STRING,
RTPINP TYPE STRING,
RTPRES TYPE STRING,
RTPOUTVALUE TYPE STRING,
RTPINPVALUE TYPE STRING,
RTPRESVALUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRM_ISU_ERTPBILLDOC_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_CRM_ISU_ERTPBILLDOC_STR-BELNR sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-RTPINTF sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-NO_ABRZEIT sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-RTPINTERFACE sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-TARIFNR sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-AB sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-BIS sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-IREGISTER sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-IOPERAND sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-EXEC sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-RTPOUT sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-RTPINP sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-RTPRES sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-RTPOUTVALUE sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-RTPINPVALUE sy-vline 
WA_CRM_ISU_ERTPBILLDOC_STR-RTPRESVALUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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