ABAP Select data from SAP table ATPC_STOCK_P into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ATPC_STOCK_P
*  INTO TABLE @DATA(IT_ATPC_STOCK_P2).
*--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_ATPC_STOCK_P INDEX 1 INTO DATA(WA_ATPC_STOCK_P2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ATPC_STOCK_P>-CLIENT = 1.
<ATPC_STOCK_P>-ATPCAT = 1.
<ATPC_STOCK_P>-SORT1 = 1.
<ATPC_STOCK_P>-SORT2 = 1.
<ATPC_STOCK_P>-MANDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ATPC_STOCK_P-MATNR, sy-vline,
  WA_ATPC_STOCK_P-WERKS, sy-vline,
  WA_ATPC_STOCK_P-LGORT, sy-vline,
  WA_ATPC_STOCK_P-CHARG, sy-vline,
  WA_ATPC_STOCK_P-SOBKZ, sy-vline,
  WA_ATPC_STOCK_P-SSKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ATPC_STOCK_P 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_ATPC_STOCK_P 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_ATPC_STOCK_P INTO WA_ATPC_STOCK_P.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ATPC_STOCK_P-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATPC_STOCK_P-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ATPC_STOCK_P-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATPC_STOCK_P-KUNNR.
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_ATPC_STOCK_P_STR, 
CLIENT TYPE STRING,
ATPCAT TYPE STRING,
SORT1 TYPE STRING,
SORT2 TYPE STRING,
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
SSKEY TYPE STRING,
SSKEY_EXT TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PSPNR TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
ATPDATE TYPE STRING,
REQQTY TYPE STRING,
CNFQTY TYPE STRING,
STOCK_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ATPC_STOCK_P_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_ATPC_STOCK_P_STR-CLIENT sy-vline 
WA_ATPC_STOCK_P_STR-ATPCAT sy-vline 
WA_ATPC_STOCK_P_STR-SORT1 sy-vline 
WA_ATPC_STOCK_P_STR-SORT2 sy-vline 
WA_ATPC_STOCK_P_STR-MANDT sy-vline 
WA_ATPC_STOCK_P_STR-MATNR sy-vline 
WA_ATPC_STOCK_P_STR-WERKS sy-vline 
WA_ATPC_STOCK_P_STR-LGORT sy-vline 
WA_ATPC_STOCK_P_STR-CHARG sy-vline 
WA_ATPC_STOCK_P_STR-SOBKZ sy-vline 
WA_ATPC_STOCK_P_STR-SSKEY sy-vline 
WA_ATPC_STOCK_P_STR-SSKEY_EXT sy-vline 
WA_ATPC_STOCK_P_STR-KDAUF sy-vline 
WA_ATPC_STOCK_P_STR-KDPOS sy-vline 
WA_ATPC_STOCK_P_STR-PSPNR sy-vline 
WA_ATPC_STOCK_P_STR-LIFNR sy-vline 
WA_ATPC_STOCK_P_STR-KUNNR sy-vline 
WA_ATPC_STOCK_P_STR-ATPDATE sy-vline 
WA_ATPC_STOCK_P_STR-REQQTY sy-vline 
WA_ATPC_STOCK_P_STR-CNFQTY sy-vline 
WA_ATPC_STOCK_P_STR-STOCK_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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