ABAP Select data from SAP table ISIWFEMLDL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISIWFEMLDL
*  INTO TABLE @DATA(IT_ISIWFEMLDL2).
*--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_ISIWFEMLDL INDEX 1 INTO DATA(WA_ISIWFEMLDL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISIWFEMLDL>-MANDT = 1.
<ISIWFEMLDL>-WORKFLOWTASKINTERNALID = 1.
<ISIWFEMLDL>-SAPOBJECTNODEREPRESENTATION = 1.
<ISIWFEMLDL>-SUPLRINVCWRKFLWTASKDESC = 1.
<ISIWFEMLDL>-SUPLRINVCWRKFLWTASKTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISIWFEMLDL-SUPLRINVCWRKFLWTSKTYPEDESC, sy-vline,
  WA_ISIWFEMLDL-SUPLRINVCWRKFLWTASKSTATUS, sy-vline,
  WA_ISIWFEMLDL-SUPLRINVCWRKFLWTSKSTATUSDESC, sy-vline,
  WA_ISIWFEMLDL-WORKFLOWTASKCREATEDBYUSER, sy-vline,
  WA_ISIWFEMLDL-SUPLRINVCWRKFLWTSKCRTNDATETIME, sy-vline,
  WA_ISIWFEMLDL-WORKFLOWTASKCURRENTUSER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISIWFEMLDL 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_ISIWFEMLDL 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_ISIWFEMLDL INTO WA_ISIWFEMLDL.


*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 SUPPLIERINVOICE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISIWFEMLDL-SUPPLIERINVOICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISIWFEMLDL-SUPPLIERINVOICE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field FISCALYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ISIWFEMLDL-FISCALYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISIWFEMLDL-FISCALYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INVOICINGPARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISIWFEMLDL-INVOICINGPARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISIWFEMLDL-INVOICINGPARTY.
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_ISIWFEMLDL_STR, 
MANDT TYPE STRING,
WORKFLOWTASKINTERNALID TYPE STRING,
SAPOBJECTNODEREPRESENTATION TYPE STRING,
SUPLRINVCWRKFLWTASKDESC TYPE STRING,
SUPLRINVCWRKFLWTASKTYPE TYPE STRING,
SUPLRINVCWRKFLWTSKTYPEDESC TYPE STRING,
SUPLRINVCWRKFLWTASKSTATUS TYPE STRING,
SUPLRINVCWRKFLWTSKSTATUSDESC TYPE STRING,
WORKFLOWTASKCREATEDBYUSER TYPE STRING,
SUPLRINVCWRKFLWTSKCRTNDATETIME TYPE STRING,
WORKFLOWTASKCURRENTUSER TYPE STRING,
FULLNAME TYPE STRING,
WORKFLOWTASKDEFINITION TYPE STRING,
WORKFLOWTASKDUEUTCDATETIME TYPE STRING,
SUPPLIERINVOICE TYPE STRING,
FISCALYEAR TYPE STRING,
COMPANYCODE TYPE STRING,
INVOICINGPARTY TYPE STRING,
INVOICEGROSSAMOUNT TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISIWFEMLDL_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_ISIWFEMLDL_STR-MANDT sy-vline 
WA_ISIWFEMLDL_STR-WORKFLOWTASKINTERNALID sy-vline 
WA_ISIWFEMLDL_STR-SAPOBJECTNODEREPRESENTATION sy-vline 
WA_ISIWFEMLDL_STR-SUPLRINVCWRKFLWTASKDESC sy-vline 
WA_ISIWFEMLDL_STR-SUPLRINVCWRKFLWTASKTYPE sy-vline 
WA_ISIWFEMLDL_STR-SUPLRINVCWRKFLWTSKTYPEDESC sy-vline 
WA_ISIWFEMLDL_STR-SUPLRINVCWRKFLWTASKSTATUS sy-vline 
WA_ISIWFEMLDL_STR-SUPLRINVCWRKFLWTSKSTATUSDESC sy-vline 
WA_ISIWFEMLDL_STR-WORKFLOWTASKCREATEDBYUSER sy-vline 
WA_ISIWFEMLDL_STR-SUPLRINVCWRKFLWTSKCRTNDATETIME sy-vline 
WA_ISIWFEMLDL_STR-WORKFLOWTASKCURRENTUSER sy-vline 
WA_ISIWFEMLDL_STR-FULLNAME sy-vline 
WA_ISIWFEMLDL_STR-WORKFLOWTASKDEFINITION sy-vline 
WA_ISIWFEMLDL_STR-WORKFLOWTASKDUEUTCDATETIME sy-vline 
WA_ISIWFEMLDL_STR-SUPPLIERINVOICE sy-vline 
WA_ISIWFEMLDL_STR-FISCALYEAR sy-vline 
WA_ISIWFEMLDL_STR-COMPANYCODE sy-vline 
WA_ISIWFEMLDL_STR-INVOICINGPARTY sy-vline 
WA_ISIWFEMLDL_STR-INVOICEGROSSAMOUNT sy-vline 
WA_ISIWFEMLDL_STR-DOCUMENTCURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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