ABAP Select data from SAP table WLB_AUTO_LB_ITAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WLB_AUTO_LB_ITAB
*  INTO TABLE @DATA(IT_WLB_AUTO_LB_ITAB2).
*--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_WLB_AUTO_LB_ITAB INDEX 1 INTO DATA(WA_WLB_AUTO_LB_ITAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WLB_AUTO_LB_ITAB>-I_POSNR = 1.
<WLB_AUTO_LB_ITAB>-LIFNR = 1.
<WLB_AUTO_LB_ITAB>-LTSNR = 1.
<WLB_AUTO_LB_ITAB>-WERKS = 1.
<WLB_AUTO_LB_ITAB>-BOPNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WLB_AUTO_LB_ITAB-BEDAT, sy-vline,
  WA_WLB_AUTO_LB_ITAB-BREICHW, sy-vline,
  WA_WLB_AUTO_LB_ITAB-MATNR, sy-vline,
  WA_WLB_AUTO_LB_ITAB-MATKL, sy-vline,
  WA_WLB_AUTO_LB_ITAB-INFNR, sy-vline,
  WA_WLB_AUTO_LB_ITAB-EKORG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WLB_AUTO_LB_ITAB 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_WLB_AUTO_LB_ITAB 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_WLB_AUTO_LB_ITAB INTO WA_WLB_AUTO_LB_ITAB.


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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field KONNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WLB_AUTO_LB_ITAB-KONNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLB_AUTO_LB_ITAB-KONNR.
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_WLB_AUTO_LB_ITAB_STR, 
I_POSNR TYPE STRING,
LIFNR TYPE STRING,
LTSNR TYPE STRING,
WERKS TYPE STRING,
BOPNR TYPE STRING,
BEDAT TYPE STRING,
BREICHW TYPE STRING,
MATNR TYPE STRING,
MATKL TYPE STRING,
INFNR TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
NORBM TYPE STRING,
NORBM_MEINS TYPE STRING,
NORBM_UMREZ TYPE STRING,
NORBM_UMREN TYPE STRING,
NORBM_ACCUM TYPE STRING,
BANFN TYPE STRING,
BNFPO TYPE STRING,
AFNAM TYPE STRING,
TXZ01 TYPE STRING,
MENGE TYPE STRING,
PONORMAL TYPE STRING,
POINVBUY TYPE STRING,
MEINS TYPE STRING,
RESME TYPE STRING,
PREIS TYPE STRING,
WAERS TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
UMREZ TYPE STRING,
UMREN TYPE STRING,
BPUMZ TYPE STRING,
BPUMN TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
AKTNR TYPE STRING,
MHDHB TYPE STRING,
PERKZ TYPE STRING,
PERIV TYPE STRING,
LABST TYPE STRING,
LGORT TYPE STRING,
BBEST TYPE STRING,
PRWRT_AVR_DAY TYPE STRING,
LGRAD TYPE STRING,
CURWEKSA TYPE STRING,
CSERLEV1 TYPE STRING,
CSERLEV2 TYPE STRING,
CSERLEV3 TYPE STRING,
DSERLEV TYPE STRING,
MATNR_DONE TYPE STRING,
WKCHECK TYPE STRING,
POCRFLG TYPE STRING,
UEBPO TYPE STRING,
UPVOR TYPE STRING,
SBSUBMI TYPE STRING,
STAPO TYPE STRING,
ATTYP TYPE STRING,
DONT_CALC TYPE STRING,
NTGEW TYPE STRING,
ORIGINALMENGE TYPE STRING,
KONNR TYPE STRING,
KTPNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WLB_AUTO_LB_ITAB_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_WLB_AUTO_LB_ITAB_STR-I_POSNR sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-LIFNR sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-LTSNR sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-WERKS sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-BOPNR sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-BEDAT sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-BREICHW sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-MATNR sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-MATKL sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-INFNR sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-EKORG sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-EKGRP sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-NORBM sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-NORBM_MEINS sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-NORBM_UMREZ sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-NORBM_UMREN sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-NORBM_ACCUM sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-BANFN sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-BNFPO sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-AFNAM sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-TXZ01 sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-MENGE sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-PONORMAL sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-POINVBUY sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-MEINS sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-RESME sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-PREIS sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-WAERS sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-EBELN sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-EBELP sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-UMREZ sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-UMREN sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-BPUMZ sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-BPUMN sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-BRGEW sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-GEWEI sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-VOLUM sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-VOLEH sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-AKTNR sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-MHDHB sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-PERKZ sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-PERIV sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-LABST sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-LGORT sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-BBEST sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-PRWRT_AVR_DAY sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-LGRAD sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-CURWEKSA sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-CSERLEV1 sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-CSERLEV2 sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-CSERLEV3 sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-DSERLEV sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-MATNR_DONE sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-WKCHECK sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-POCRFLG sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-UEBPO sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-UPVOR sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-SBSUBMI sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-STAPO sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-ATTYP sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-DONT_CALC sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-NTGEW sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-ORIGINALMENGE sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-KONNR sy-vline 
WA_WLB_AUTO_LB_ITAB_STR-KTPNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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