ABAP Select data from SAP table API_STPO_I into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM API_STPO_I
*  INTO TABLE @DATA(IT_API_STPO_I2).
*--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_API_STPO_I INDEX 1 INTO DATA(WA_API_STPO_I2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<API_STPO_I>-ISTUFE = 1.
<API_STPO_I>-IWEG = 1.
<API_STPO_I>-MATNRST = 1.
<API_STPO_I>-WERKST = 1.
<API_STPO_I>-STLANST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_API_STPO_I-STLNRST, sy-vline,
  WA_API_STPO_I-STLALST, sy-vline,
  WA_API_STPO_I-POSNR, sy-vline,
  WA_API_STPO_I-IDNRK, sy-vline,
  WA_API_STPO_I-WERKS, sy-vline,
  WA_API_STPO_I-STLTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_API_STPO_I 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_API_STPO_I 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_API_STPO_I INTO WA_API_STPO_I.


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

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

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

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

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

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

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

*Conversion exit MATN1, internal->external for field MATVA
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_API_STPO_I-MATVA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_API_STPO_I-MATVA.
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_API_STPO_I_STR, 
ISTUFE TYPE STRING,
IWEG TYPE STRING,
MATNRST TYPE STRING,
WERKST TYPE STRING,
STLANST TYPE STRING,
STLNRST TYPE STRING,
STLALST TYPE STRING,
POSNR TYPE STRING,
IDNRK TYPE STRING,
WERKS TYPE STRING,
STLTY TYPE STRING,
STLAN TYPE STRING,
BMEIN TYPE STRING,
BMENG TYPE STRING,
CUOBJ TYPE STRING,
INSTS TYPE STRING,
IMATN TYPE STRING,
MATVA TYPE STRING,
MATCU TYPE STRING,
STATU TYPE STRING,
IFIXI TYPE STRING,
IINST_MARK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_API_STPO_I_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_API_STPO_I_STR-ISTUFE sy-vline 
WA_API_STPO_I_STR-IWEG sy-vline 
WA_API_STPO_I_STR-MATNRST sy-vline 
WA_API_STPO_I_STR-WERKST sy-vline 
WA_API_STPO_I_STR-STLANST sy-vline 
WA_API_STPO_I_STR-STLNRST sy-vline 
WA_API_STPO_I_STR-STLALST sy-vline 
WA_API_STPO_I_STR-POSNR sy-vline 
WA_API_STPO_I_STR-IDNRK sy-vline 
WA_API_STPO_I_STR-WERKS sy-vline 
WA_API_STPO_I_STR-STLTY sy-vline 
WA_API_STPO_I_STR-STLAN sy-vline 
WA_API_STPO_I_STR-BMEIN sy-vline 
WA_API_STPO_I_STR-BMENG sy-vline 
WA_API_STPO_I_STR-CUOBJ sy-vline 
WA_API_STPO_I_STR-INSTS sy-vline 
WA_API_STPO_I_STR-IMATN sy-vline 
WA_API_STPO_I_STR-MATVA sy-vline 
WA_API_STPO_I_STR-MATCU sy-vline 
WA_API_STPO_I_STR-STATU sy-vline 
WA_API_STPO_I_STR-IFIXI sy-vline 
WA_API_STPO_I_STR-IINST_MARK sy-vline      INTO ld_text SEPARATED BY SPACE.

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