ABAP Select data from SAP table WSTI_WD_CRE_MLT_ITEM into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WSTI_WD_CRE_MLT_ITEM
*  INTO TABLE @DATA(IT_WSTI_WD_CRE_MLT_ITEM2).
*--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_WSTI_WD_CRE_MLT_ITEM INDEX 1 INTO DATA(WA_WSTI_WD_CRE_MLT_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WSTI_WD_CRE_MLT_ITEM>-WROW = 1.
<WSTI_WD_CRE_MLT_ITEM>-MAT_KEY = 1.
<WSTI_WD_CRE_MLT_ITEM>-MATNR = 1.
<WSTI_WD_CRE_MLT_ITEM>-EAN11 = 1.
<WSTI_WD_CRE_MLT_ITEM>-WMAKTX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WSTI_WD_CRE_MLT_ITEM-MATKL, sy-vline,
  WA_WSTI_WD_CRE_MLT_ITEM-WWGBEZ, sy-vline,
  WA_WSTI_WD_CRE_MLT_ITEM-BSTAR, sy-vline,
  WA_WSTI_WD_CRE_MLT_ITEM-BTEXT, sy-vline,
  WA_WSTI_WD_CRE_MLT_ITEM-CHARG, sy-vline,
  WA_WSTI_WD_CRE_MLT_ITEM-VBELN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WSTI_WD_CRE_MLT_ITEM 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_WSTI_WD_CRE_MLT_ITEM 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_WSTI_WD_CRE_MLT_ITEM INTO WA_WSTI_WD_CRE_MLT_ITEM.


*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_WSTI_WD_CRE_MLT_ITEM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_WD_CRE_MLT_ITEM-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WSTI_WD_CRE_MLT_ITEM-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WSTI_WD_CRE_MLT_ITEM-KUNNR.
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_WSTI_WD_CRE_MLT_ITEM_STR, 
WROW TYPE STRING,
MAT_KEY TYPE STRING,
MATNR TYPE STRING,
EAN11 TYPE STRING,
WMAKTX TYPE STRING,
MATKL TYPE STRING,
WWGBEZ TYPE STRING,
BSTAR TYPE STRING,
BTEXT TYPE STRING,
CHARG TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
LGORT TYPE STRING,
LGOBE TYPE STRING,
SOBKZ TYPE STRING,
SOTXT TYPE STRING,
MAT_KEY_R TYPE STRING,
BSTAR_R TYPE STRING,
CHARG_R TYPE STRING,
VBELN_R TYPE STRING,
POSNR_R TYPE STRING,
LIFNR_R TYPE STRING,
KUNNR_R TYPE STRING,
LGORT_R TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WSTI_WD_CRE_MLT_ITEM_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_WSTI_WD_CRE_MLT_ITEM_STR-WROW sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-MAT_KEY sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-MATNR sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-EAN11 sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-WMAKTX sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-MATKL sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-WWGBEZ sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-BSTAR sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-BTEXT sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-CHARG sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-VBELN sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-POSNR sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-LIFNR sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-KUNNR sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-LGORT sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-LGOBE sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-SOBKZ sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-SOTXT sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-MAT_KEY_R sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-BSTAR_R sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-CHARG_R sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-VBELN_R sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-POSNR_R sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-LIFNR_R sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-KUNNR_R sy-vline 
WA_WSTI_WD_CRE_MLT_ITEM_STR-LGORT_R sy-vline      INTO ld_text SEPARATED BY SPACE.

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