ABAP Select data from SAP table IWIPLACEHOLDER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWIPLACEHOLDER
*  INTO TABLE @DATA(IT_IWIPLACEHOLDER2).
*--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_IWIPLACEHOLDER INDEX 1 INTO DATA(WA_IWIPLACEHOLDER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWIPLACEHOLDER>-MANDT = 1.
<IWIPLACEHOLDER>-MFGWORKINSTRUCTION = 1.
<IWIPLACEHOLDER>-MFGWORKINSTRUCTIONVERSCOUNTER = 1.
<IWIPLACEHOLDER>-MFGWORKINSTRUCTIONPLACEHOLDER = 1.
<IWIPLACEHOLDER>-LANGUAGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWIPLACEHOLDER-MFGWORKINSTRUCTIONVARIABLE, sy-vline,
  WA_IWIPLACEHOLDER-SELECTEDCONTEXTTYPE, sy-vline,
  WA_IWIPLACEHOLDER-SELECTEDCONTEXTNAME, sy-vline,
  WA_IWIPLACEHOLDER-MFGWRKINSTRNPLACEHOLDERISREF, sy-vline,
  WA_IWIPLACEHOLDER-MFGWRKINSTRNPLACEHOLDERISLINK, sy-vline,
  WA_IWIPLACEHOLDER-WORKINSTRNPLACEHOLDERISINPTFLD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWIPLACEHOLDER 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_IWIPLACEHOLDER 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_IWIPLACEHOLDER INTO WA_IWIPLACEHOLDER.


*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 ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IWIPLACEHOLDER-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWIPLACEHOLDER-LANGUAGE.
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_IWIPLACEHOLDER_STR, 
MANDT TYPE STRING,
MFGWORKINSTRUCTION TYPE STRING,
MFGWORKINSTRUCTIONVERSCOUNTER TYPE STRING,
MFGWORKINSTRUCTIONPLACEHOLDER TYPE STRING,
LANGUAGE TYPE STRING,
MFGWORKINSTRUCTIONVARIABLE TYPE STRING,
SELECTEDCONTEXTTYPE TYPE STRING,
SELECTEDCONTEXTNAME TYPE STRING,
MFGWRKINSTRNPLACEHOLDERISREF TYPE STRING,
MFGWRKINSTRNPLACEHOLDERISLINK TYPE STRING,
WORKINSTRNPLACEHOLDERISINPTFLD TYPE STRING,
MFGWRKINSTRNPLCHLDRINPTLBLTYPE TYPE STRING,
MFGWRKINSTRNPLCHLDRCOLLINTID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWIPLACEHOLDER_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_IWIPLACEHOLDER_STR-MANDT sy-vline 
WA_IWIPLACEHOLDER_STR-MFGWORKINSTRUCTION sy-vline 
WA_IWIPLACEHOLDER_STR-MFGWORKINSTRUCTIONVERSCOUNTER sy-vline 
WA_IWIPLACEHOLDER_STR-MFGWORKINSTRUCTIONPLACEHOLDER sy-vline 
WA_IWIPLACEHOLDER_STR-LANGUAGE sy-vline 
WA_IWIPLACEHOLDER_STR-MFGWORKINSTRUCTIONVARIABLE sy-vline 
WA_IWIPLACEHOLDER_STR-SELECTEDCONTEXTTYPE sy-vline 
WA_IWIPLACEHOLDER_STR-SELECTEDCONTEXTNAME sy-vline 
WA_IWIPLACEHOLDER_STR-MFGWRKINSTRNPLACEHOLDERISREF sy-vline 
WA_IWIPLACEHOLDER_STR-MFGWRKINSTRNPLACEHOLDERISLINK sy-vline 
WA_IWIPLACEHOLDER_STR-WORKINSTRNPLACEHOLDERISINPTFLD sy-vline 
WA_IWIPLACEHOLDER_STR-MFGWRKINSTRNPLCHLDRINPTLBLTYPE sy-vline 
WA_IWIPLACEHOLDER_STR-MFGWRKINSTRNPLCHLDRCOLLINTID sy-vline      INTO ld_text SEPARATED BY SPACE.

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