ABAP Select data from SAP table ISU21LIN 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 ISU21LIN 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 ISU21LIN. 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 ISU21LIN 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_ISU21LIN TYPE STANDARD TABLE OF ISU21LIN,
      WA_ISU21LIN TYPE ISU21LIN,
      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: <ISU21LIN> TYPE ISU21LIN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ISU21LIN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ISU21LIN
  INTO TABLE IT_ISU21LIN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISU21LIN
*  INTO TABLE @DATA(IT_ISU21LIN2).
*--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_ISU21LIN INDEX 1 INTO DATA(WA_ISU21LIN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ISU21LIN ASSIGNING <ISU21LIN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISU21LIN>-E_GROUP = 1.
<ISU21LIN>-SPART = 1.
<ISU21LIN>-VTREF = 1.
<ISU21LIN>-HVORG = 1.
<ISU21LIN>-TVORG = 1.

ENDLOOP.

LOOP AT IT_ISU21LIN INTO WA_ISU21LIN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISU21LIN-KOFIZ, sy-vline,
  WA_ISU21LIN-MWSKZ, sy-vline,
  WA_ISU21LIN-WAERS, sy-vline,
  WA_ISU21LIN-SKTPZ, sy-vline,
  WA_ISU21LIN-FAEDN, sy-vline,
  WA_ISU21LIN-FAEDS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISU21LIN 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_ISU21LIN 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_ISU21LIN INTO WA_ISU21LIN.


*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 VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-VTREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ASBLG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-ASBLG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-ASBLG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRZNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-PRZNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-PRZNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NPLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-NPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-NPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-IMKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SERVICE_DOC_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-SERVICE_DOC_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-SERVICE_DOC_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SC_BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-SC_BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-SC_BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIL, internal->external for field FIPEX
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-FIPEX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-FIPEX.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-GRANT_NBR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field BUDGETYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-BUDGETYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-BUDGETYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEGMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU21LIN-SEGMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU21LIN-SEGMENT.
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_ISU21LIN_STR, 
E_GROUP TYPE STRING,
SPART TYPE STRING,
VTREF TYPE STRING,
HVORG TYPE STRING,
TVORG TYPE STRING,
KOFIZ TYPE STRING,
MWSKZ TYPE STRING,
WAERS TYPE STRING,
SKTPZ TYPE STRING,
FAEDN TYPE STRING,
FAEDS TYPE STRING,
TXJCD TYPE STRING,
TXDAT TYPE STRING,
BETRW TYPE STRING,
SBETW TYPE STRING,
SKFBT TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
ABRZU TYPE STRING,
ABRZO TYPE STRING,
APERIODIC TYPE STRING,
PSGRP TYPE STRING,
SGRKEY TYPE STRING,
ASBLG TYPE STRING,
LOGNO TYPE STRING,
SHKZG TYPE STRING,
FITPR TYPE STRING,
COUNC TYPE STRING,
REGIO TYPE STRING,
GRICD TYPE STRING,
GITYP TYPE STRING,
MWSZKZ TYPE STRING,
CRPRC TYPE STRING,
ASBACH_BTR TYPE STRING,
SIGN TYPE STRING,
NEGBU TYPE STRING,
OLD_PERIOD TYPE STRING,
BUDAT TYPE STRING,
GJAHR TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
WERKS TYPE STRING,
PRCTR TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
LSTAR TYPE STRING,
PRZNR TYPE STRING,
AUFNR TYPE STRING,
AUFPS TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KZVBR TYPE STRING,
PS_PSP_PNR TYPE STRING,
KSTRG TYPE STRING,
NPLNR TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
IMKEY TYPE STRING,
DABRZ TYPE STRING,
PAOBJNR TYPE STRING,
SERVICE_DOC_TYPE TYPE STRING,
SERVICE_DOC_ID TYPE STRING,
SERVICE_DOC_ITEM_ID TYPE STRING,
CO_KAKST TYPE STRING,
CO_KAAUF TYPE STRING,
CO_KAPRO TYPE STRING,
CO_KAKTR TYPE STRING,
CO_KANPL TYPE STRING,
CO_KAIMO TYPE STRING,
CO_KAKDA TYPE STRING,
CO_KAERG TYPE STRING,
CO_KAABS TYPE STRING,
CO_KAPRZ TYPE STRING,
CO_KASVD TYPE STRING,
CO_KASAT TYPE STRING,
INT_CROSSREFNO TYPE STRING,
BUPLA TYPE STRING,
XABRZ_VJ TYPE STRING,
BELNR TYPE STRING,
SC_BELNR TYPE STRING,
FMTYP TYPE STRING,
ORIGFIKRS TYPE STRING,
FIPEX TYPE STRING,
FISTL TYPE STRING,
FONDS TYPE STRING,
FKBER TYPE STRING,
MEASURE TYPE STRING,
GRANT_NBR TYPE STRING,
BUDGETYEAR TYPE STRING,
BUDGET_PD TYPE STRING,
SEGMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISU21LIN_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_ISU21LIN_STR-E_GROUP sy-vline 
WA_ISU21LIN_STR-SPART sy-vline 
WA_ISU21LIN_STR-VTREF sy-vline 
WA_ISU21LIN_STR-HVORG sy-vline 
WA_ISU21LIN_STR-TVORG sy-vline 
WA_ISU21LIN_STR-KOFIZ sy-vline 
WA_ISU21LIN_STR-MWSKZ sy-vline 
WA_ISU21LIN_STR-WAERS sy-vline 
WA_ISU21LIN_STR-SKTPZ sy-vline 
WA_ISU21LIN_STR-FAEDN sy-vline 
WA_ISU21LIN_STR-FAEDS sy-vline 
WA_ISU21LIN_STR-TXJCD sy-vline 
WA_ISU21LIN_STR-TXDAT sy-vline 
WA_ISU21LIN_STR-BETRW sy-vline 
WA_ISU21LIN_STR-SBETW sy-vline 
WA_ISU21LIN_STR-SKFBT sy-vline 
WA_ISU21LIN_STR-MENGE sy-vline 
WA_ISU21LIN_STR-MEINS sy-vline 
WA_ISU21LIN_STR-ABRZU sy-vline 
WA_ISU21LIN_STR-ABRZO sy-vline 
WA_ISU21LIN_STR-APERIODIC sy-vline 
WA_ISU21LIN_STR-PSGRP sy-vline 
WA_ISU21LIN_STR-SGRKEY sy-vline 
WA_ISU21LIN_STR-ASBLG sy-vline 
WA_ISU21LIN_STR-LOGNO sy-vline 
WA_ISU21LIN_STR-SHKZG sy-vline 
WA_ISU21LIN_STR-FITPR sy-vline 
WA_ISU21LIN_STR-COUNC sy-vline 
WA_ISU21LIN_STR-REGIO sy-vline 
WA_ISU21LIN_STR-GRICD sy-vline 
WA_ISU21LIN_STR-GITYP sy-vline 
WA_ISU21LIN_STR-MWSZKZ sy-vline 
WA_ISU21LIN_STR-CRPRC sy-vline 
WA_ISU21LIN_STR-ASBACH_BTR sy-vline 
WA_ISU21LIN_STR-SIGN sy-vline 
WA_ISU21LIN_STR-NEGBU sy-vline 
WA_ISU21LIN_STR-OLD_PERIOD sy-vline 
WA_ISU21LIN_STR-BUDAT sy-vline 
WA_ISU21LIN_STR-GJAHR sy-vline 
WA_ISU21LIN_STR-BUKRS sy-vline 
WA_ISU21LIN_STR-GSBER sy-vline 
WA_ISU21LIN_STR-WERKS sy-vline 
WA_ISU21LIN_STR-PRCTR sy-vline 
WA_ISU21LIN_STR-KOKRS sy-vline 
WA_ISU21LIN_STR-KOSTL sy-vline 
WA_ISU21LIN_STR-LSTAR sy-vline 
WA_ISU21LIN_STR-PRZNR sy-vline 
WA_ISU21LIN_STR-AUFNR sy-vline 
WA_ISU21LIN_STR-AUFPS sy-vline 
WA_ISU21LIN_STR-KDAUF sy-vline 
WA_ISU21LIN_STR-KDPOS sy-vline 
WA_ISU21LIN_STR-KZVBR sy-vline 
WA_ISU21LIN_STR-PS_PSP_PNR sy-vline 
WA_ISU21LIN_STR-KSTRG sy-vline 
WA_ISU21LIN_STR-NPLNR sy-vline 
WA_ISU21LIN_STR-AUFPL sy-vline 
WA_ISU21LIN_STR-APLZL sy-vline 
WA_ISU21LIN_STR-IMKEY sy-vline 
WA_ISU21LIN_STR-DABRZ sy-vline 
WA_ISU21LIN_STR-PAOBJNR sy-vline 
WA_ISU21LIN_STR-SERVICE_DOC_TYPE sy-vline 
WA_ISU21LIN_STR-SERVICE_DOC_ID sy-vline 
WA_ISU21LIN_STR-SERVICE_DOC_ITEM_ID sy-vline 
WA_ISU21LIN_STR-CO_KAKST sy-vline 
WA_ISU21LIN_STR-CO_KAAUF sy-vline 
WA_ISU21LIN_STR-CO_KAPRO sy-vline 
WA_ISU21LIN_STR-CO_KAKTR sy-vline 
WA_ISU21LIN_STR-CO_KANPL sy-vline 
WA_ISU21LIN_STR-CO_KAIMO sy-vline 
WA_ISU21LIN_STR-CO_KAKDA sy-vline 
WA_ISU21LIN_STR-CO_KAERG sy-vline 
WA_ISU21LIN_STR-CO_KAABS sy-vline 
WA_ISU21LIN_STR-CO_KAPRZ sy-vline 
WA_ISU21LIN_STR-CO_KASVD sy-vline 
WA_ISU21LIN_STR-CO_KASAT sy-vline 
WA_ISU21LIN_STR-INT_CROSSREFNO sy-vline 
WA_ISU21LIN_STR-BUPLA sy-vline 
WA_ISU21LIN_STR-XABRZ_VJ sy-vline 
WA_ISU21LIN_STR-BELNR sy-vline 
WA_ISU21LIN_STR-SC_BELNR sy-vline 
WA_ISU21LIN_STR-FMTYP sy-vline 
WA_ISU21LIN_STR-ORIGFIKRS sy-vline 
WA_ISU21LIN_STR-FIPEX sy-vline 
WA_ISU21LIN_STR-FISTL sy-vline 
WA_ISU21LIN_STR-FONDS sy-vline 
WA_ISU21LIN_STR-FKBER sy-vline 
WA_ISU21LIN_STR-MEASURE sy-vline 
WA_ISU21LIN_STR-GRANT_NBR sy-vline 
WA_ISU21LIN_STR-BUDGETYEAR sy-vline 
WA_ISU21LIN_STR-BUDGET_PD sy-vline 
WA_ISU21LIN_STR-SEGMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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