ABAP Select data from SAP table E1WTYP1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1WTYP1 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 E1WTYP1. 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 E1WTYP1 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_E1WTYP1 TYPE STANDARD TABLE OF E1WTYP1,
      WA_E1WTYP1 TYPE E1WTYP1,
      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: <E1WTYP1> TYPE E1WTYP1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1WTYP1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1WTYP1
  INTO TABLE IT_E1WTYP1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1WTYP1
*  INTO TABLE @DATA(IT_E1WTYP12).
*--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_E1WTYP1 INDEX 1 INTO DATA(WA_E1WTYP12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1WTYP1 ASSIGNING <E1WTYP1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1WTYP1>-POSNR = 1.
<E1WTYP1>-POSKT = 1.
<E1WTYP1>-DEFCT = 1.
<E1WTYP1>-ITMNO = 1.
<E1WTYP1>-QUANT = 1.

ENDLOOP.

LOOP AT IT_E1WTYP1 INTO WA_E1WTYP1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1WTYP1-MEINH, sy-vline,
  WA_E1WTYP1-CONTR, sy-vline,
  WA_E1WTYP1-CNTTY, sy-vline,
  WA_E1WTYP1-REJCD, sy-vline,
  WA_E1WTYP1-REFNR, sy-vline,
  WA_E1WTYP1-REFKT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1WTYP1 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_E1WTYP1 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_E1WTYP1 INTO WA_E1WTYP1.


*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_E1WTYP1_STR, 
POSNR TYPE STRING,
POSKT TYPE STRING,
DEFCT TYPE STRING,
ITMNO TYPE STRING,
QUANT TYPE STRING,
MEINH TYPE STRING,
CONTR TYPE STRING,
CNTTY TYPE STRING,
REJCD TYPE STRING,
REFNR TYPE STRING,
REFKT TYPE STRING,
RETPA TYPE STRING,
CAUSP TYPE STRING,
PVTEXT TYPE STRING,
RETPA_V TYPE STRING,
POSKT_CUST TYPE STRING,
REFDT_REFNR TYPE STRING,
I_RELOB_EXT TYPE STRING,
I_RELTY TYPE STRING,
I_RELDT TYPE STRING,
I_SERNO TYPE STRING,
I_GWLDT TYPE STRING,
I_MGANR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1WTYP1_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_E1WTYP1_STR-POSNR sy-vline 
WA_E1WTYP1_STR-POSKT sy-vline 
WA_E1WTYP1_STR-DEFCT sy-vline 
WA_E1WTYP1_STR-ITMNO sy-vline 
WA_E1WTYP1_STR-QUANT sy-vline 
WA_E1WTYP1_STR-MEINH sy-vline 
WA_E1WTYP1_STR-CONTR sy-vline 
WA_E1WTYP1_STR-CNTTY sy-vline 
WA_E1WTYP1_STR-REJCD sy-vline 
WA_E1WTYP1_STR-REFNR sy-vline 
WA_E1WTYP1_STR-REFKT sy-vline 
WA_E1WTYP1_STR-RETPA sy-vline 
WA_E1WTYP1_STR-CAUSP sy-vline 
WA_E1WTYP1_STR-PVTEXT sy-vline 
WA_E1WTYP1_STR-RETPA_V sy-vline 
WA_E1WTYP1_STR-POSKT_CUST sy-vline 
WA_E1WTYP1_STR-REFDT_REFNR sy-vline 
WA_E1WTYP1_STR-I_RELOB_EXT sy-vline 
WA_E1WTYP1_STR-I_RELTY sy-vline 
WA_E1WTYP1_STR-I_RELDT sy-vline 
WA_E1WTYP1_STR-I_SERNO sy-vline 
WA_E1WTYP1_STR-I_GWLDT sy-vline 
WA_E1WTYP1_STR-I_MGANR sy-vline      INTO ld_text SEPARATED BY SPACE.

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