ABAP Select data from SAP table LRESB 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 LRESB 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 LRESB. 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 LRESB 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_LRESB TYPE STANDARD TABLE OF LRESB,
      WA_LRESB TYPE LRESB,
      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: <LRESB> TYPE LRESB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LRESB
*  INTO TABLE @DATA(IT_LRESB2).
*--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_LRESB INDEX 1 INTO DATA(WA_LRESB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LRESB>-MANDT = 1.
<LRESB>-RSNUM = 1.
<LRESB>-RSPOS = 1.
<LRESB>-POSNR = 1.
<LRESB>-TABIX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LRESB-CHKOK, sy-vline,
  WA_LRESB-CHNGE, sy-vline,
  WA_LRESB-MARKI, sy-vline,
  WA_LRESB-SELKZ, sy-vline,
  WA_LRESB-XLOEK, sy-vline,
  WA_LRESB-XWAOK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LRESB 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_LRESB 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_LRESB INTO WA_LRESB.


*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 NUMCV, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_LRESB-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LRESB-POSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_LRESB-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LRESB-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_LRESB-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LRESB-VORNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field KUNWE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LRESB-KUNWE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LRESB-KUNWE.
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_LRESB_STR, 
MANDT TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
POSNR TYPE STRING,
TABIX TYPE STRING,
CHKOK TYPE STRING,
CHNGE TYPE STRING,
MARKI TYPE STRING,
SELKZ TYPE STRING,
XLOEK TYPE STRING,
XWAOK TYPE STRING,
MATNR TYPE STRING,
MATXT TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
LSONR TYPE STRING,
BDTER TYPE STRING,
BDZTP TYPE STRING,
BDMNG TYPE STRING,
MEINS TYPE STRING,
ENMNG TYPE STRING,
AUFNR TYPE STRING,
TBMNG TYPE STRING,
BERKZ TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
ARBPL TYPE STRING,
OBJID TYPE STRING,
OFMNG TYPE STRING,
PRVBE TYPE STRING,
PVBTX TYPE STRING,
VORNR TYPE STRING,
EPROT TYPE STRING,
ECODE TYPE STRING,
ERFMG TYPE STRING,
ERFME TYPE STRING,
PLNFL TYPE STRING,
PKNUM TYPE STRING,
PKPOS TYPE STRING,
BDART TYPE STRING,
SONUM TYPE STRING,
FMENG TYPE STRING,
RSART TYPE STRING,
KZECH TYPE STRING,
SPLKZ TYPE STRING,
ABLAD TYPE STRING,
TBMNA TYPE STRING,
OFMNA TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
LVSME TYPE STRING,
BDMNL TYPE STRING,
TBMNL TYPE STRING,
OFMNL TYPE STRING,
PSPEL TYPE STRING,
LIFNR TYPE STRING,
VMENG TYPE STRING,
LGORT_TB TYPE STRING,
BDMNG_SAV TYPE STRING,
PKKEY TYPE STRING,
KZWSO TYPE STRING,
ENMNA TYPE STRING,
BELTP TYPE STRING,
LFART TYPE STRING,
AUART TYPE STRING,
BWART TYPE STRING,
KUNWE TYPE STRING,
KZDLG TYPE STRING,
TANUM TYPE STRING,
TAPOS TYPE STRING,
XHUPF TYPE STRING,
RGEKZ TYPE STRING,
UMLGO TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGTY TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
XEWM TYPE STRING,
SGT_SCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LRESB_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_LRESB_STR-MANDT sy-vline 
WA_LRESB_STR-RSNUM sy-vline 
WA_LRESB_STR-RSPOS sy-vline 
WA_LRESB_STR-POSNR sy-vline 
WA_LRESB_STR-TABIX sy-vline 
WA_LRESB_STR-CHKOK sy-vline 
WA_LRESB_STR-CHNGE sy-vline 
WA_LRESB_STR-MARKI sy-vline 
WA_LRESB_STR-SELKZ sy-vline 
WA_LRESB_STR-XLOEK sy-vline 
WA_LRESB_STR-XWAOK sy-vline 
WA_LRESB_STR-MATNR sy-vline 
WA_LRESB_STR-MATXT sy-vline 
WA_LRESB_STR-WERKS sy-vline 
WA_LRESB_STR-LGORT sy-vline 
WA_LRESB_STR-CHARG sy-vline 
WA_LRESB_STR-SOBKZ sy-vline 
WA_LRESB_STR-KDAUF sy-vline 
WA_LRESB_STR-KDPOS sy-vline 
WA_LRESB_STR-LSONR sy-vline 
WA_LRESB_STR-BDTER sy-vline 
WA_LRESB_STR-BDZTP sy-vline 
WA_LRESB_STR-BDMNG sy-vline 
WA_LRESB_STR-MEINS sy-vline 
WA_LRESB_STR-ENMNG sy-vline 
WA_LRESB_STR-AUFNR sy-vline 
WA_LRESB_STR-TBMNG sy-vline 
WA_LRESB_STR-BERKZ sy-vline 
WA_LRESB_STR-LGNUM sy-vline 
WA_LRESB_STR-LGTYP sy-vline 
WA_LRESB_STR-LGPLA sy-vline 
WA_LRESB_STR-ARBPL sy-vline 
WA_LRESB_STR-OBJID sy-vline 
WA_LRESB_STR-OFMNG sy-vline 
WA_LRESB_STR-PRVBE sy-vline 
WA_LRESB_STR-PVBTX sy-vline 
WA_LRESB_STR-VORNR sy-vline 
WA_LRESB_STR-EPROT sy-vline 
WA_LRESB_STR-ECODE sy-vline 
WA_LRESB_STR-ERFMG sy-vline 
WA_LRESB_STR-ERFME sy-vline 
WA_LRESB_STR-PLNFL sy-vline 
WA_LRESB_STR-PKNUM sy-vline 
WA_LRESB_STR-PKPOS sy-vline 
WA_LRESB_STR-BDART sy-vline 
WA_LRESB_STR-SONUM sy-vline 
WA_LRESB_STR-FMENG sy-vline 
WA_LRESB_STR-RSART sy-vline 
WA_LRESB_STR-KZECH sy-vline 
WA_LRESB_STR-SPLKZ sy-vline 
WA_LRESB_STR-ABLAD sy-vline 
WA_LRESB_STR-TBMNA sy-vline 
WA_LRESB_STR-OFMNA sy-vline 
WA_LRESB_STR-UMREZ sy-vline 
WA_LRESB_STR-UMREN sy-vline 
WA_LRESB_STR-LVSME sy-vline 
WA_LRESB_STR-BDMNL sy-vline 
WA_LRESB_STR-TBMNL sy-vline 
WA_LRESB_STR-OFMNL sy-vline 
WA_LRESB_STR-PSPEL sy-vline 
WA_LRESB_STR-LIFNR sy-vline 
WA_LRESB_STR-VMENG sy-vline 
WA_LRESB_STR-LGORT_TB sy-vline 
WA_LRESB_STR-BDMNG_SAV sy-vline 
WA_LRESB_STR-PKKEY sy-vline 
WA_LRESB_STR-KZWSO sy-vline 
WA_LRESB_STR-ENMNA sy-vline 
WA_LRESB_STR-BELTP sy-vline 
WA_LRESB_STR-LFART sy-vline 
WA_LRESB_STR-AUART sy-vline 
WA_LRESB_STR-BWART sy-vline 
WA_LRESB_STR-KUNWE sy-vline 
WA_LRESB_STR-KZDLG sy-vline 
WA_LRESB_STR-TANUM sy-vline 
WA_LRESB_STR-TAPOS sy-vline 
WA_LRESB_STR-XHUPF sy-vline 
WA_LRESB_STR-RGEKZ sy-vline 
WA_LRESB_STR-UMLGO sy-vline 
WA_LRESB_STR-MSGID sy-vline 
WA_LRESB_STR-MSGNO sy-vline 
WA_LRESB_STR-MSGTY sy-vline 
WA_LRESB_STR-MSGV1 sy-vline 
WA_LRESB_STR-MSGV2 sy-vline 
WA_LRESB_STR-MSGV3 sy-vline 
WA_LRESB_STR-MSGV4 sy-vline 
WA_LRESB_STR-XEWM sy-vline 
WA_LRESB_STR-SGT_SCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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