ABAP Select data from SAP table DIESL1 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 DIESL1 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 DIESL1. 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 DIESL1 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_DIESL1 TYPE STANDARD TABLE OF DIESL1,
      WA_DIESL1 TYPE DIESL1,
      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: <DIESL1> TYPE DIESL1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DIESL1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DIESL1
  INTO TABLE IT_DIESL1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DIESL1
*  INTO TABLE @DATA(IT_DIESL12).
*--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_DIESL1 INDEX 1 INTO DATA(WA_DIESL12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DIESL1 ASSIGNING <DIESL1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DIESL1>-FPACKNO = 1.
<DIESL1>-HPACKNO = 1.
<DIESL1>-KNUMV = 1.
<DIESL1>-EBELN = 1.
<DIESL1>-EBELP = 1.

ENDLOOP.

LOOP AT IT_DIESL1 INTO WA_DIESL1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DIESL1-BSTYP, sy-vline,
  WA_DIESL1-WAERS, sy-vline,
  WA_DIESL1-MANDT, sy-vline,
  WA_DIESL1-PACKNO, sy-vline,
  WA_DIESL1-INTROW, sy-vline,
  WA_DIESL1-EXTROW, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DIESL1 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_DIESL1 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_DIESL1 INTO WA_DIESL1.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIESL1-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIESL1-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SRVPOS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIESL1-SRVPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIESL1-SRVPOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DIESL1-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIESL1-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field IWEIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DIESL1-IWEIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIESL1-IWEIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIESL1-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIESL1-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIESL1-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIESL1-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_DIESL1_STR, 
FPACKNO TYPE STRING,
HPACKNO TYPE STRING,
KNUMV TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
BSTYP TYPE STRING,
WAERS TYPE STRING,
MANDT TYPE STRING,
PACKNO TYPE STRING,
INTROW TYPE STRING,
EXTROW TYPE STRING,
DEL TYPE STRING,
SRVPOS TYPE STRING,
RANG TYPE STRING,
EXTGROUP TYPE STRING,
PACKAGE TYPE STRING,
SUB_PACKNO TYPE STRING,
LBNUM TYPE STRING,
AUSGB TYPE STRING,
STLVPOS TYPE STRING,
EXTSRVNO TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
UEBTO TYPE STRING,
UEBTK TYPE STRING,
WITH_LIM TYPE STRING,
SPINF TYPE STRING,
PEINH TYPE STRING,
BRTWR TYPE STRING,
NETWR TYPE STRING,
FROMPOS TYPE STRING,
TOPOS TYPE STRING,
KTEXT1 TYPE STRING,
VRTKZ TYPE STRING,
TWRKZ TYPE STRING,
PERNR TYPE STRING,
MOLGA TYPE STRING,
LGART TYPE STRING,
LGTXT TYPE STRING,
STELL TYPE STRING,
IFTNR TYPE STRING,
BUDAT TYPE STRING,
INSDT TYPE STRING,
PLN_PACKNO TYPE STRING,
PLN_INTROW TYPE STRING,
KNT_PACKNO TYPE STRING,
KNT_INTROW TYPE STRING,
TMP_PACKNO TYPE STRING,
TMP_INTROW TYPE STRING,
STLV_LIM TYPE STRING,
LIMIT_ROW TYPE STRING,
ACT_MENGE TYPE STRING,
ACT_WERT TYPE STRING,
KNT_WERT TYPE STRING,
KNT_MENGE TYPE STRING,
ZIELWERT TYPE STRING,
UNG_WERT TYPE STRING,
UNG_MENGE TYPE STRING,
ALT_INTROW TYPE STRING,
BASIC TYPE STRING,
ALTERNAT TYPE STRING,
BIDDER TYPE STRING,
SUPPLE TYPE STRING,
FREEQTY TYPE STRING,
INFORM TYPE STRING,
PAUSCH TYPE STRING,
EVENTUAL TYPE STRING,
MWSKZ TYPE STRING,
TXJCD TYPE STRING,
TXDAT TYPE STRING,
PRS_CHG TYPE STRING,
MATKL TYPE STRING,
TBTWR TYPE STRING,
NAVNW TYPE STRING,
BASWR TYPE STRING,
KKNUMV TYPE STRING,
IWEIN TYPE STRING,
INT_WORK TYPE STRING,
EXTERNALID TYPE STRING,
KSTAR TYPE STRING,
ACT_WORK TYPE STRING,
MAPNO TYPE STRING,
SRVMAPKEY TYPE STRING,
TAXTARIFFCODE TYPE STRING,
SDATE TYPE STRING,
BEGTIME TYPE STRING,
ENDTIME TYPE STRING,
PERSEXT TYPE STRING,
CATSCOUNTE TYPE STRING,
STOKZ TYPE STRING,
BELNR TYPE STRING,
FORMELNR TYPE STRING,
FRMVAL1 TYPE STRING,
FRMVAL2 TYPE STRING,
FRMVAL3 TYPE STRING,
FRMVAL4 TYPE STRING,
FRMVAL5 TYPE STRING,
USERF1_NUM TYPE STRING,
USERF2_NUM TYPE STRING,
USERF1_TXT TYPE STRING,
USERF2_TXT TYPE STRING,
KNOBJ TYPE STRING,
CHGTEXT TYPE STRING,
KALNR TYPE STRING,
KLVAR TYPE STRING,
EXTDES TYPE STRING,
BOSINTER TYPE STRING,
BOSGRP TYPE STRING,
BOS_RISK TYPE STRING,
BOS_ECP TYPE STRING,
CHGLTEXT TYPE STRING,
BOSGRUPPENR TYPE STRING,
BOSLFDNR TYPE STRING,
BOSDRUKZ TYPE STRING,
BOSSUPPLENO TYPE STRING,
BOSSUPPLESTATUS TYPE STRING,
/SAPBOQ/OBJTYPE TYPE STRING,
/SAPBOQ/SPOSNR TYPE STRING,
/SAPBOQ/MINTROW TYPE STRING,
/SAPBOQ/QT_REL TYPE STRING,
/SAPBOQ/CK_QTY TYPE STRING,
/SAPBOQ/M_FRATE TYPE STRING,
EXTREFKEY TYPE STRING,
INV_MENGE TYPE STRING,
_DATAAGING TYPE STRING,
PER_SDATE TYPE STRING,
PER_EDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DIESL1_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_DIESL1_STR-FPACKNO sy-vline 
WA_DIESL1_STR-HPACKNO sy-vline 
WA_DIESL1_STR-KNUMV sy-vline 
WA_DIESL1_STR-EBELN sy-vline 
WA_DIESL1_STR-EBELP sy-vline 
WA_DIESL1_STR-BSTYP sy-vline 
WA_DIESL1_STR-WAERS sy-vline 
WA_DIESL1_STR-MANDT sy-vline 
WA_DIESL1_STR-PACKNO sy-vline 
WA_DIESL1_STR-INTROW sy-vline 
WA_DIESL1_STR-EXTROW sy-vline 
WA_DIESL1_STR-DEL sy-vline 
WA_DIESL1_STR-SRVPOS sy-vline 
WA_DIESL1_STR-RANG sy-vline 
WA_DIESL1_STR-EXTGROUP sy-vline 
WA_DIESL1_STR-PACKAGE sy-vline 
WA_DIESL1_STR-SUB_PACKNO sy-vline 
WA_DIESL1_STR-LBNUM sy-vline 
WA_DIESL1_STR-AUSGB sy-vline 
WA_DIESL1_STR-STLVPOS sy-vline 
WA_DIESL1_STR-EXTSRVNO sy-vline 
WA_DIESL1_STR-MENGE sy-vline 
WA_DIESL1_STR-MEINS sy-vline 
WA_DIESL1_STR-UEBTO sy-vline 
WA_DIESL1_STR-UEBTK sy-vline 
WA_DIESL1_STR-WITH_LIM sy-vline 
WA_DIESL1_STR-SPINF sy-vline 
WA_DIESL1_STR-PEINH sy-vline 
WA_DIESL1_STR-BRTWR sy-vline 
WA_DIESL1_STR-NETWR sy-vline 
WA_DIESL1_STR-FROMPOS sy-vline 
WA_DIESL1_STR-TOPOS sy-vline 
WA_DIESL1_STR-KTEXT1 sy-vline 
WA_DIESL1_STR-VRTKZ sy-vline 
WA_DIESL1_STR-TWRKZ sy-vline 
WA_DIESL1_STR-PERNR sy-vline 
WA_DIESL1_STR-MOLGA sy-vline 
WA_DIESL1_STR-LGART sy-vline 
WA_DIESL1_STR-LGTXT sy-vline 
WA_DIESL1_STR-STELL sy-vline 
WA_DIESL1_STR-IFTNR sy-vline 
WA_DIESL1_STR-BUDAT sy-vline 
WA_DIESL1_STR-INSDT sy-vline 
WA_DIESL1_STR-PLN_PACKNO sy-vline 
WA_DIESL1_STR-PLN_INTROW sy-vline 
WA_DIESL1_STR-KNT_PACKNO sy-vline 
WA_DIESL1_STR-KNT_INTROW sy-vline 
WA_DIESL1_STR-TMP_PACKNO sy-vline 
WA_DIESL1_STR-TMP_INTROW sy-vline 
WA_DIESL1_STR-STLV_LIM sy-vline 
WA_DIESL1_STR-LIMIT_ROW sy-vline 
WA_DIESL1_STR-ACT_MENGE sy-vline 
WA_DIESL1_STR-ACT_WERT sy-vline 
WA_DIESL1_STR-KNT_WERT sy-vline 
WA_DIESL1_STR-KNT_MENGE sy-vline 
WA_DIESL1_STR-ZIELWERT sy-vline 
WA_DIESL1_STR-UNG_WERT sy-vline 
WA_DIESL1_STR-UNG_MENGE sy-vline 
WA_DIESL1_STR-ALT_INTROW sy-vline 
WA_DIESL1_STR-BASIC sy-vline 
WA_DIESL1_STR-ALTERNAT sy-vline 
WA_DIESL1_STR-BIDDER sy-vline 
WA_DIESL1_STR-SUPPLE sy-vline 
WA_DIESL1_STR-FREEQTY sy-vline 
WA_DIESL1_STR-INFORM sy-vline 
WA_DIESL1_STR-PAUSCH sy-vline 
WA_DIESL1_STR-EVENTUAL sy-vline 
WA_DIESL1_STR-MWSKZ sy-vline 
WA_DIESL1_STR-TXJCD sy-vline 
WA_DIESL1_STR-TXDAT sy-vline 
WA_DIESL1_STR-PRS_CHG sy-vline 
WA_DIESL1_STR-MATKL sy-vline 
WA_DIESL1_STR-TBTWR sy-vline 
WA_DIESL1_STR-NAVNW sy-vline 
WA_DIESL1_STR-BASWR sy-vline 
WA_DIESL1_STR-KKNUMV sy-vline 
WA_DIESL1_STR-IWEIN sy-vline 
WA_DIESL1_STR-INT_WORK sy-vline 
WA_DIESL1_STR-EXTERNALID sy-vline 
WA_DIESL1_STR-KSTAR sy-vline 
WA_DIESL1_STR-ACT_WORK sy-vline 
WA_DIESL1_STR-MAPNO sy-vline 
WA_DIESL1_STR-SRVMAPKEY sy-vline 
WA_DIESL1_STR-TAXTARIFFCODE sy-vline 
WA_DIESL1_STR-SDATE sy-vline 
WA_DIESL1_STR-BEGTIME sy-vline 
WA_DIESL1_STR-ENDTIME sy-vline 
WA_DIESL1_STR-PERSEXT sy-vline 
WA_DIESL1_STR-CATSCOUNTE sy-vline 
WA_DIESL1_STR-STOKZ sy-vline 
WA_DIESL1_STR-BELNR sy-vline 
WA_DIESL1_STR-FORMELNR sy-vline 
WA_DIESL1_STR-FRMVAL1 sy-vline 
WA_DIESL1_STR-FRMVAL2 sy-vline 
WA_DIESL1_STR-FRMVAL3 sy-vline 
WA_DIESL1_STR-FRMVAL4 sy-vline 
WA_DIESL1_STR-FRMVAL5 sy-vline 
WA_DIESL1_STR-USERF1_NUM sy-vline 
WA_DIESL1_STR-USERF2_NUM sy-vline 
WA_DIESL1_STR-USERF1_TXT sy-vline 
WA_DIESL1_STR-USERF2_TXT sy-vline 
WA_DIESL1_STR-KNOBJ sy-vline 
WA_DIESL1_STR-CHGTEXT sy-vline 
WA_DIESL1_STR-KALNR sy-vline 
WA_DIESL1_STR-KLVAR sy-vline 
WA_DIESL1_STR-EXTDES sy-vline 
WA_DIESL1_STR-BOSINTER sy-vline 
WA_DIESL1_STR-BOSGRP sy-vline 
WA_DIESL1_STR-BOS_RISK sy-vline 
WA_DIESL1_STR-BOS_ECP sy-vline 
WA_DIESL1_STR-CHGLTEXT sy-vline 
WA_DIESL1_STR-BOSGRUPPENR sy-vline 
WA_DIESL1_STR-BOSLFDNR sy-vline 
WA_DIESL1_STR-BOSDRUKZ sy-vline 
WA_DIESL1_STR-BOSSUPPLENO sy-vline 
WA_DIESL1_STR-BOSSUPPLESTATUS sy-vline 
WA_DIESL1_STR-/SAPBOQ/OBJTYPE sy-vline 
WA_DIESL1_STR-/SAPBOQ/SPOSNR sy-vline 
WA_DIESL1_STR-/SAPBOQ/MINTROW sy-vline 
WA_DIESL1_STR-/SAPBOQ/QT_REL sy-vline 
WA_DIESL1_STR-/SAPBOQ/CK_QTY sy-vline 
WA_DIESL1_STR-/SAPBOQ/M_FRATE sy-vline 
WA_DIESL1_STR-EXTREFKEY sy-vline 
WA_DIESL1_STR-INV_MENGE sy-vline 
WA_DIESL1_STR-_DATAAGING sy-vline 
WA_DIESL1_STR-PER_SDATE sy-vline 
WA_DIESL1_STR-PER_EDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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