ABAP Select data from SAP table WSL_POS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WSL_POS
*  INTO TABLE @DATA(IT_WSL_POS2).
*--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_WSL_POS INDEX 1 INTO DATA(WA_WSL_POS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WSL_POS>-BBGNO = 1.
<WSL_POS>-BBRNO = 1.
<WSL_POS>-MATNR = 1.
<WSL_POS>-EAN11 = 1.
<WSL_POS>-IDNLF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WSL_POS-TEXT20, sy-vline,
  WA_WSL_POS-TEXT30, sy-vline,
  WA_WSL_POS-MAKTM, sy-vline,
  WA_WSL_POS-BSTME, sy-vline,
  WA_WSL_POS-VRKME, sy-vline,
  WA_WSL_POS-BASME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WSL_POS 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_WSL_POS 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_WSL_POS INTO WA_WSL_POS.


*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 MATN5, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_WSL_POS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSL_POS-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_WSL_POS-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSL_POS-EAN11.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit MATN1, internal->external for field NFMAT_LONG
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WSL_POS-NFMAT_LONG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSL_POS-NFMAT_LONG.
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_WSL_POS_STR, 
BBGNO TYPE STRING,
BBRNO TYPE STRING,
MATNR TYPE STRING,
EAN11 TYPE STRING,
IDNLF TYPE STRING,
TEXT20 TYPE STRING,
TEXT30 TYPE STRING,
MAKTM TYPE STRING,
BSTME TYPE STRING,
VRKME TYPE STRING,
BASME TYPE STRING,
FACTR TYPE STRING,
BB_PRICE TYPE STRING,
SL_EVPRS TYPE STRING,
SL_EKPNN10 TYPE STRING,
SL_EKPNN TYPE STRING,
WAERS TYPE STRING,
COMMNT TYPE STRING,
SATNR TYPE STRING,
ATTYP TYPE STRING,
DISMM TYPE STRING,
KNZBB TYPE STRING,
EISBE TYPE STRING,
MINBE TYPE STRING,
MABST TYPE STRING,
NFMAT TYPE STRING,
AUSDT TYPE STRING,
MINBM TYPE STRING,
APLFZ TYPE STRING,
LIFAB TYPE STRING,
LIFBI TYPE STRING,
PROMO_FLAG TYPE STRING,
AKTIO TYPE STRING,
VKDAB_A TYPE STRING,
VKDBI_A TYPE STRING,
FBDAT TYPE STRING,
SBDAT TYPE STRING,
GLTAB TYPE STRING,
MLGUT TYPE STRING,
GROUP1 TYPE STRING,
GROUP2 TYPE STRING,
MAKTM_ME TYPE STRING,
MATNR_LONG TYPE STRING,
SATNR_LONG TYPE STRING,
NFMAT_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WSL_POS_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_WSL_POS_STR-BBGNO sy-vline 
WA_WSL_POS_STR-BBRNO sy-vline 
WA_WSL_POS_STR-MATNR sy-vline 
WA_WSL_POS_STR-EAN11 sy-vline 
WA_WSL_POS_STR-IDNLF sy-vline 
WA_WSL_POS_STR-TEXT20 sy-vline 
WA_WSL_POS_STR-TEXT30 sy-vline 
WA_WSL_POS_STR-MAKTM sy-vline 
WA_WSL_POS_STR-BSTME sy-vline 
WA_WSL_POS_STR-VRKME sy-vline 
WA_WSL_POS_STR-BASME sy-vline 
WA_WSL_POS_STR-FACTR sy-vline 
WA_WSL_POS_STR-BB_PRICE sy-vline 
WA_WSL_POS_STR-SL_EVPRS sy-vline 
WA_WSL_POS_STR-SL_EKPNN10 sy-vline 
WA_WSL_POS_STR-SL_EKPNN sy-vline 
WA_WSL_POS_STR-WAERS sy-vline 
WA_WSL_POS_STR-COMMNT sy-vline 
WA_WSL_POS_STR-SATNR sy-vline 
WA_WSL_POS_STR-ATTYP sy-vline 
WA_WSL_POS_STR-DISMM sy-vline 
WA_WSL_POS_STR-KNZBB sy-vline 
WA_WSL_POS_STR-EISBE sy-vline 
WA_WSL_POS_STR-MINBE sy-vline 
WA_WSL_POS_STR-MABST sy-vline 
WA_WSL_POS_STR-NFMAT sy-vline 
WA_WSL_POS_STR-AUSDT sy-vline 
WA_WSL_POS_STR-MINBM sy-vline 
WA_WSL_POS_STR-APLFZ sy-vline 
WA_WSL_POS_STR-LIFAB sy-vline 
WA_WSL_POS_STR-LIFBI sy-vline 
WA_WSL_POS_STR-PROMO_FLAG sy-vline 
WA_WSL_POS_STR-AKTIO sy-vline 
WA_WSL_POS_STR-VKDAB_A sy-vline 
WA_WSL_POS_STR-VKDBI_A sy-vline 
WA_WSL_POS_STR-FBDAT sy-vline 
WA_WSL_POS_STR-SBDAT sy-vline 
WA_WSL_POS_STR-GLTAB sy-vline 
WA_WSL_POS_STR-MLGUT sy-vline 
WA_WSL_POS_STR-GROUP1 sy-vline 
WA_WSL_POS_STR-GROUP2 sy-vline 
WA_WSL_POS_STR-MAKTM_ME sy-vline 
WA_WSL_POS_STR-MATNR_LONG sy-vline 
WA_WSL_POS_STR-SATNR_LONG sy-vline 
WA_WSL_POS_STR-NFMAT_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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