ABAP Select data from SAP table IEWSTPRTNR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEWSTPRTNR
*  INTO TABLE @DATA(IT_IEWSTPRTNR2).
*--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_IEWSTPRTNR INDEX 1 INTO DATA(WA_IEWSTPRTNR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEWSTPRTNR>-MANDT = 1.
<IEWSTPRTNR>-ENVRMTWASTEPARTNERUUID = 1.
<IEWSTPRTNR>-ENVRMTWASTEPARTNERTYPE = 1.
<IEWSTPRTNR>-ENVRMTWASTEPARTNERNMBR = 1.
<IEWSTPRTNR>-ENVRMTWASTEGNRTRUUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEWSTPRTNR-ENVRMTWASTEGNRTRID, sy-vline,
  WA_IEWSTPRTNR-CREATIONUTCDATETIME, sy-vline,
  WA_IEWSTPRTNR-CREATEDBYUSER, sy-vline,
  WA_IEWSTPRTNR-LASTCHANGEUTCDATETIME, sy-vline,
  WA_IEWSTPRTNR-LASTCHANGEDBYUSER, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_IEWSTPRTNR 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_IEWSTPRTNR 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_IEWSTPRTNR INTO WA_IEWSTPRTNR.


*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 ENVRMTWASTEPARTNERNMBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEWSTPRTNR-ENVRMTWASTEPARTNERNMBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEWSTPRTNR-ENVRMTWASTEPARTNERNMBR.
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_IEWSTPRTNR_STR, 
MANDT TYPE STRING,
ENVRMTWASTEPARTNERUUID TYPE STRING,
ENVRMTWASTEPARTNERTYPE TYPE STRING,
ENVRMTWASTEPARTNERNMBR TYPE STRING,
ENVRMTWASTEGNRTRUUID TYPE STRING,
ENVRMTWASTEGNRTRID TYPE STRING,
CREATIONUTCDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEUTCDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEWSTPRTNR_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_IEWSTPRTNR_STR-MANDT sy-vline 
WA_IEWSTPRTNR_STR-ENVRMTWASTEPARTNERUUID sy-vline 
WA_IEWSTPRTNR_STR-ENVRMTWASTEPARTNERTYPE sy-vline 
WA_IEWSTPRTNR_STR-ENVRMTWASTEPARTNERNMBR sy-vline 
WA_IEWSTPRTNR_STR-ENVRMTWASTEGNRTRUUID sy-vline 
WA_IEWSTPRTNR_STR-ENVRMTWASTEGNRTRID sy-vline 
WA_IEWSTPRTNR_STR-CREATIONUTCDATETIME sy-vline 
WA_IEWSTPRTNR_STR-CREATEDBYUSER sy-vline 
WA_IEWSTPRTNR_STR-LASTCHANGEUTCDATETIME sy-vline 
WA_IEWSTPRTNR_STR-LASTCHANGEDBYUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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