ABAP Select data from SAP table E1WTYK1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1WTYK1 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 E1WTYK1. 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 E1WTYK1 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_E1WTYK1 TYPE STANDARD TABLE OF E1WTYK1,
      WA_E1WTYK1 TYPE E1WTYK1,
      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: <E1WTYK1> TYPE E1WTYK1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1WTYK1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1WTYK1
  INTO TABLE IT_E1WTYK1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1WTYK1
*  INTO TABLE @DATA(IT_E1WTYK12).
*--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_E1WTYK1 INDEX 1 INTO DATA(WA_E1WTYK12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1WTYK1 ASSIGNING <E1WTYK1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1WTYK1>-INTNO = 1.
<E1WTYK1>-CLMTY = 1.
<E1WTYK1>-REFDT = 1.
<E1WTYK1>-REFNO = 1.
<E1WTYK1>-REFNR = 1.

ENDLOOP.

LOOP AT IT_E1WTYK1 INTO WA_E1WTYK1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1WTYK1-REFKT, sy-vline,
  WA_E1WTYK1-OLDCN, sy-vline,
  WA_E1WTYK1-AUTNO, sy-vline,
  WA_E1WTYK1-AUTNA, sy-vline,
  WA_E1WTYK1-REJCD, sy-vline,
  WA_E1WTYK1-WERKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1WTYK1 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_E1WTYK1 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_E1WTYK1 INTO WA_E1WTYK1.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_E1WTYK1_STR, 
INTNO TYPE STRING,
CLMTY TYPE STRING,
REFDT TYPE STRING,
REFNO TYPE STRING,
REFNR TYPE STRING,
REFKT TYPE STRING,
OLDCN TYPE STRING,
AUTNO TYPE STRING,
AUTNA TYPE STRING,
REJCD TYPE STRING,
WERKS TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
PNTEXT TYPE STRING,
PVTEXT TYPE STRING,
V_CRNCY TYPE STRING,
ENDVN TYPE STRING,
RELDT TYPE STRING,
REFDT_VERS TYPE STRING,
SDVBELN TYPE STRING,
SDPOSNR TYPE STRING,
KURSK TYPE STRING,
FKDAT TYPE STRING,
PRSDT TYPE STRING,
CBACTIONDT TYPE STRING,
QMNUM TYPE STRING,
CLMGRP TYPE STRING,
V_MGANR TYPE STRING,
V_GWLDT TYPE STRING,
RESULT_OUT_MWTYV TYPE STRING,
RESULT_IN_MWTYV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1WTYK1_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_E1WTYK1_STR-INTNO sy-vline 
WA_E1WTYK1_STR-CLMTY sy-vline 
WA_E1WTYK1_STR-REFDT sy-vline 
WA_E1WTYK1_STR-REFNO sy-vline 
WA_E1WTYK1_STR-REFNR sy-vline 
WA_E1WTYK1_STR-REFKT sy-vline 
WA_E1WTYK1_STR-OLDCN sy-vline 
WA_E1WTYK1_STR-AUTNO sy-vline 
WA_E1WTYK1_STR-AUTNA sy-vline 
WA_E1WTYK1_STR-REJCD sy-vline 
WA_E1WTYK1_STR-WERKS sy-vline 
WA_E1WTYK1_STR-VKORG sy-vline 
WA_E1WTYK1_STR-VTWEG sy-vline 
WA_E1WTYK1_STR-SPART sy-vline 
WA_E1WTYK1_STR-PNTEXT sy-vline 
WA_E1WTYK1_STR-PVTEXT sy-vline 
WA_E1WTYK1_STR-V_CRNCY sy-vline 
WA_E1WTYK1_STR-ENDVN sy-vline 
WA_E1WTYK1_STR-RELDT sy-vline 
WA_E1WTYK1_STR-REFDT_VERS sy-vline 
WA_E1WTYK1_STR-SDVBELN sy-vline 
WA_E1WTYK1_STR-SDPOSNR sy-vline 
WA_E1WTYK1_STR-KURSK sy-vline 
WA_E1WTYK1_STR-FKDAT sy-vline 
WA_E1WTYK1_STR-PRSDT sy-vline 
WA_E1WTYK1_STR-CBACTIONDT sy-vline 
WA_E1WTYK1_STR-QMNUM sy-vline 
WA_E1WTYK1_STR-CLMGRP sy-vline 
WA_E1WTYK1_STR-V_MGANR sy-vline 
WA_E1WTYK1_STR-V_GWLDT sy-vline 
WA_E1WTYK1_STR-RESULT_OUT_MWTYV sy-vline 
WA_E1WTYK1_STR-RESULT_IN_MWTYV sy-vline      INTO ld_text SEPARATED BY SPACE.

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