ABAP Select data from SAP table J_1ISERVC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_1ISERVC 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 J_1ISERVC. 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 J_1ISERVC 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_J_1ISERVC TYPE STANDARD TABLE OF J_1ISERVC,
      WA_J_1ISERVC TYPE J_1ISERVC,
      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: <J_1ISERVC> TYPE J_1ISERVC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_1ISERVC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_1ISERVC
  INTO TABLE IT_J_1ISERVC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_1ISERVC
*  INTO TABLE @DATA(IT_J_1ISERVC2).
*--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_J_1ISERVC INDEX 1 INTO DATA(WA_J_1ISERVC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_1ISERVC ASSIGNING <J_1ISERVC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_1ISERVC>-MANDT = 1.
<J_1ISERVC>-RECTYP = 1.
<J_1ISERVC>-AWTYP = 1.
<J_1ISERVC>-AWREF = 1.
<J_1ISERVC>-AWORG = 1.

ENDLOOP.

LOOP AT IT_J_1ISERVC INTO WA_J_1ISERVC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_1ISERVC-BUZEI, sy-vline,
  WA_J_1ISERVC-BUKRS, sy-vline,
  WA_J_1ISERVC-GSBER, sy-vline,
  WA_J_1ISERVC-BUDAT, sy-vline,
  WA_J_1ISERVC-LIFNR, sy-vline,
  WA_J_1ISERVC-REGNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_1ISERVC 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_J_1ISERVC 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_J_1ISERVC INTO WA_J_1ISERVC.


*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 AWREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1ISERVC-AWREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1ISERVC-AWREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1ISERVC-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1ISERVC-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CDDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1ISERVC-CDDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1ISERVC-CDDOC.
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_J_1ISERVC_STR, 
MANDT TYPE STRING,
RECTYP TYPE STRING,
AWTYP TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
BUZEI TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
BUDAT TYPE STRING,
LIFNR TYPE STRING,
REGNO TYPE STRING,
MWSKZ TYPE STRING,
TAXAMT TYPE STRING,
BASAMT TYPE STRING,
CURR TYPE STRING,
CDDOC TYPE STRING,
CDYEAR TYPE STRING,
PAYDUE TYPE STRING,
LSTATUS TYPE STRING,
PSTATUS TYPE STRING,
CHLN_NO TYPE STRING,
CHLNDT TYPE STRING,
USNAM TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_1ISERVC_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_J_1ISERVC_STR-MANDT sy-vline 
WA_J_1ISERVC_STR-RECTYP sy-vline 
WA_J_1ISERVC_STR-AWTYP sy-vline 
WA_J_1ISERVC_STR-AWREF sy-vline 
WA_J_1ISERVC_STR-AWORG sy-vline 
WA_J_1ISERVC_STR-BUZEI sy-vline 
WA_J_1ISERVC_STR-BUKRS sy-vline 
WA_J_1ISERVC_STR-GSBER sy-vline 
WA_J_1ISERVC_STR-BUDAT sy-vline 
WA_J_1ISERVC_STR-LIFNR sy-vline 
WA_J_1ISERVC_STR-REGNO sy-vline 
WA_J_1ISERVC_STR-MWSKZ sy-vline 
WA_J_1ISERVC_STR-TAXAMT sy-vline 
WA_J_1ISERVC_STR-BASAMT sy-vline 
WA_J_1ISERVC_STR-CURR sy-vline 
WA_J_1ISERVC_STR-CDDOC sy-vline 
WA_J_1ISERVC_STR-CDYEAR sy-vline 
WA_J_1ISERVC_STR-PAYDUE sy-vline 
WA_J_1ISERVC_STR-LSTATUS sy-vline 
WA_J_1ISERVC_STR-PSTATUS sy-vline 
WA_J_1ISERVC_STR-CHLN_NO sy-vline 
WA_J_1ISERVC_STR-CHLNDT sy-vline 
WA_J_1ISERVC_STR-USNAM sy-vline 
WA_J_1ISERVC_STR-CPUDT sy-vline 
WA_J_1ISERVC_STR-CPUTM sy-vline      INTO ld_text SEPARATED BY SPACE.

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