ABAP Select data from SAP table IEWSTFCLTY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEWSTFCLTY
*  INTO TABLE @DATA(IT_IEWSTFCLTY2).
*--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_IEWSTFCLTY INDEX 1 INTO DATA(WA_IEWSTFCLTY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEWSTFCLTY>-MANDT = 1.
<IEWSTFCLTY>-ENVRMTWASTEPARTDSPLFCLTYUUID = 1.
<IEWSTFCLTY>-ENVRMTWASTEPARTNERUUID = 1.
<IEWSTFCLTY>-ADDRESSNUMBER = 1.
<IEWSTFCLTY>-ENVRMTWASTEPARTFCLTYNAME = 1.

ENDLOOP.

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

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


*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 ADDRESSNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEWSTFCLTY-ADDRESSNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEWSTFCLTY-ADDRESSNUMBER.
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_IEWSTFCLTY_STR, 
MANDT TYPE STRING,
ENVRMTWASTEPARTDSPLFCLTYUUID TYPE STRING,
ENVRMTWASTEPARTNERUUID TYPE STRING,
ADDRESSNUMBER TYPE STRING,
ENVRMTWASTEPARTFCLTYNAME TYPE STRING,
ENVRMTWASTEFCLTYREGISTRATIONID TYPE STRING,
CREATIONUTCDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEUTCDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEWSTFCLTY_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_IEWSTFCLTY_STR-MANDT sy-vline 
WA_IEWSTFCLTY_STR-ENVRMTWASTEPARTDSPLFCLTYUUID sy-vline 
WA_IEWSTFCLTY_STR-ENVRMTWASTEPARTNERUUID sy-vline 
WA_IEWSTFCLTY_STR-ADDRESSNUMBER sy-vline 
WA_IEWSTFCLTY_STR-ENVRMTWASTEPARTFCLTYNAME sy-vline 
WA_IEWSTFCLTY_STR-ENVRMTWASTEFCLTYREGISTRATIONID sy-vline 
WA_IEWSTFCLTY_STR-CREATIONUTCDATETIME sy-vline 
WA_IEWSTFCLTY_STR-CREATEDBYUSER sy-vline 
WA_IEWSTFCLTY_STR-LASTCHANGEUTCDATETIME sy-vline 
WA_IEWSTFCLTY_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.