ABAP Select data from SAP table WPOS_PRICES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WPOS_PRICES
*  INTO TABLE @DATA(IT_WPOS_PRICES2).
*--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_WPOS_PRICES INDEX 1 INTO DATA(WA_WPOS_PRICES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WPOS_PRICES>-ARTNR = 1.
<WPOS_PRICES>-VRKME = 1.
<WPOS_PRICES>-DATAB_SEL = 1.
<WPOS_PRICES>-DATBI_SEL = 1.
<WPOS_PRICES>-KSCHL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WPOS_PRICES-DATAB, sy-vline,
  WA_WPOS_PRICES-DATBI, sy-vline,
  WA_WPOS_PRICES-DATAB_KOND, sy-vline,
  WA_WPOS_PRICES-KRECH, sy-vline,
  WA_WPOS_PRICES-KBETR, sy-vline,
  WA_WPOS_PRICES-WAERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WPOS_PRICES 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_WPOS_PRICES 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_WPOS_PRICES INTO WA_WPOS_PRICES.


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

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

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

*Conversion exit ALPHA, internal->external for field AKTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WPOS_PRICES-AKTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WPOS_PRICES-AKTNR.
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_WPOS_PRICES_STR, 
ARTNR TYPE STRING,
VRKME TYPE STRING,
DATAB_SEL TYPE STRING,
DATBI_SEL TYPE STRING,
KSCHL TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
DATAB_KOND TYPE STRING,
KRECH TYPE STRING,
KBETR TYPE STRING,
WAERS TYPE STRING,
KPEIN TYPE STRING,
KMEIN TYPE STRING,
KNTYP TYPE STRING,
KNUMH TYPE STRING,
KOPOS TYPE STRING,
KONWS TYPE STRING,
AKTNR TYPE STRING,
CHGFL TYPE STRING,
NO_DATA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WPOS_PRICES_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_WPOS_PRICES_STR-ARTNR sy-vline 
WA_WPOS_PRICES_STR-VRKME sy-vline 
WA_WPOS_PRICES_STR-DATAB_SEL sy-vline 
WA_WPOS_PRICES_STR-DATBI_SEL sy-vline 
WA_WPOS_PRICES_STR-KSCHL sy-vline 
WA_WPOS_PRICES_STR-DATAB sy-vline 
WA_WPOS_PRICES_STR-DATBI sy-vline 
WA_WPOS_PRICES_STR-DATAB_KOND sy-vline 
WA_WPOS_PRICES_STR-KRECH sy-vline 
WA_WPOS_PRICES_STR-KBETR sy-vline 
WA_WPOS_PRICES_STR-WAERS sy-vline 
WA_WPOS_PRICES_STR-KPEIN sy-vline 
WA_WPOS_PRICES_STR-KMEIN sy-vline 
WA_WPOS_PRICES_STR-KNTYP sy-vline 
WA_WPOS_PRICES_STR-KNUMH sy-vline 
WA_WPOS_PRICES_STR-KOPOS sy-vline 
WA_WPOS_PRICES_STR-KONWS sy-vline 
WA_WPOS_PRICES_STR-AKTNR sy-vline 
WA_WPOS_PRICES_STR-CHGFL sy-vline 
WA_WPOS_PRICES_STR-NO_DATA sy-vline      INTO ld_text SEPARATED BY SPACE.

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