ABAP Select data from SAP table WETI into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WETI 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 WETI. 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 WETI 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_WETI TYPE STANDARD TABLE OF WETI,
      WA_WETI TYPE WETI,
      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: <WETI> TYPE WETI.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WETI
*  INTO TABLE @DATA(IT_WETI2).
*--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_WETI INDEX 1 INTO DATA(WA_WETI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WETI>-MATNR = 1.
<WETI>-WERKS = 1.
<WETI>-KUNNR = 1.
<WETI>-DATUM = 1.
<WETI>-AKTNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WETI-VRKME, sy-vline,
  WA_WETI-ANZAL, sy-vline,
  WA_WETI-MEINH, sy-vline,
  WA_WETI-MENGE, sy-vline,
  WA_WETI-VWAER, sy-vline,
  WA_WETI-VBETR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WETI 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_WETI 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_WETI INTO WA_WETI.


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

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

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

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

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

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

*Conversion exit EAN11, internal->external for field EANNR
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_WETI-EANNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WETI-EANNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit SPDEV, internal->external for field LDEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_WETI-LDEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WETI-LDEST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_WETI-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WETI-SPRAS.
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_WETI_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
KUNNR TYPE STRING,
DATUM TYPE STRING,
AKTNR TYPE STRING,
VRKME TYPE STRING,
ANZAL TYPE STRING,
MEINH TYPE STRING,
MENGE TYPE STRING,
VWAER TYPE STRING,
VBETR TYPE STRING,
VKOND TYPE STRING,
VGLPR TYPE STRING,
VPREH TYPE STRING,
INHME TYPE STRING,
INHLT TYPE STRING,
MAKTX TYPE STRING,
EANNR TYPE STRING,
EANTP TYPE STRING,
LIFNR TYPE STRING,
MINBE TYPE STRING,
BSTME TYPE STRING,
FACTR TYPE STRING,
LIFRI TYPE STRING,
LIZYK TYPE STRING,
BBTYP TYPE STRING,
BBVER TYPE STRING,
BBDAT TYPE STRING,
LDEST TYPE STRING,
LANDA TYPE STRING,
KSCHL TYPE STRING,
NACHA TYPE STRING,
ETIART TYPE STRING,
ETITYP TYPE STRING,
LAYOUT TYPE STRING,
SPRAS TYPE STRING,
ETIAG TYPE STRING,
ETIKG TYPE STRING,
AVKVO TYPE STRING,
AVKBI TYPE STRING,
KALSM TYPE STRING,
MESTYP TYPE STRING,
ANART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WETI_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_WETI_STR-MATNR sy-vline 
WA_WETI_STR-WERKS sy-vline 
WA_WETI_STR-KUNNR sy-vline 
WA_WETI_STR-DATUM sy-vline 
WA_WETI_STR-AKTNR sy-vline 
WA_WETI_STR-VRKME sy-vline 
WA_WETI_STR-ANZAL sy-vline 
WA_WETI_STR-MEINH sy-vline 
WA_WETI_STR-MENGE sy-vline 
WA_WETI_STR-VWAER sy-vline 
WA_WETI_STR-VBETR sy-vline 
WA_WETI_STR-VKOND sy-vline 
WA_WETI_STR-VGLPR sy-vline 
WA_WETI_STR-VPREH sy-vline 
WA_WETI_STR-INHME sy-vline 
WA_WETI_STR-INHLT sy-vline 
WA_WETI_STR-MAKTX sy-vline 
WA_WETI_STR-EANNR sy-vline 
WA_WETI_STR-EANTP sy-vline 
WA_WETI_STR-LIFNR sy-vline 
WA_WETI_STR-MINBE sy-vline 
WA_WETI_STR-BSTME sy-vline 
WA_WETI_STR-FACTR sy-vline 
WA_WETI_STR-LIFRI sy-vline 
WA_WETI_STR-LIZYK sy-vline 
WA_WETI_STR-BBTYP sy-vline 
WA_WETI_STR-BBVER sy-vline 
WA_WETI_STR-BBDAT sy-vline 
WA_WETI_STR-LDEST sy-vline 
WA_WETI_STR-LANDA sy-vline 
WA_WETI_STR-KSCHL sy-vline 
WA_WETI_STR-NACHA sy-vline 
WA_WETI_STR-ETIART sy-vline 
WA_WETI_STR-ETITYP sy-vline 
WA_WETI_STR-LAYOUT sy-vline 
WA_WETI_STR-SPRAS sy-vline 
WA_WETI_STR-ETIAG sy-vline 
WA_WETI_STR-ETIKG sy-vline 
WA_WETI_STR-AVKVO sy-vline 
WA_WETI_STR-AVKBI sy-vline 
WA_WETI_STR-KALSM sy-vline 
WA_WETI_STR-MESTYP sy-vline 
WA_WETI_STR-ANART sy-vline      INTO ld_text SEPARATED BY SPACE.

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