ABAP Select data from SAP table /TDAG/CPS_WHERUSED_PURE_IO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /TDAG/CPS_WHERUSED_PURE_IO 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 /TDAG/CPS_WHERUSED_PURE_IO. 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 /TDAG/CPS_WHERUSED_PURE_IO 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_/TDAG/CPS_WHERUSED_PURE_IO TYPE STANDARD TABLE OF /TDAG/CPS_WHERUSED_PURE_IO,
      WA_/TDAG/CPS_WHERUSED_PURE_IO TYPE /TDAG/CPS_WHERUSED_PURE_IO,
      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: </TDAG/CPS_WHERUSED_PURE_IO> TYPE /TDAG/CPS_WHERUSED_PURE_IO.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /TDAG/CPS_WHERUSED_PURE_IO
  INTO TABLE IT_/TDAG/CPS_WHERUSED_PURE_IO.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /TDAG/CPS_WHERUSED_PURE_IO
*  INTO TABLE @DATA(IT_/TDAG/CPS_WHERUSED_PURE_IO2).
*--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_/TDAG/CPS_WHERUSED_PURE_IO INDEX 1 INTO DATA(WA_/TDAG/CPS_WHERUSED_PURE_IO2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/TDAG/CPS_WHERUSED_PURE_IO ASSIGNING </TDAG/CPS_WHERUSED_PURE_IO>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</TDAG/CPS_WHERUSED_PURE_IO>-PART_RECN = 1.
</TDAG/CPS_WHERUSED_PURE_IO>-PART_SUBID = 1.
</TDAG/CPS_WHERUSED_PURE_IO>-PART_SUBCAT = 1.
</TDAG/CPS_WHERUSED_PURE_IO>-PART_NO = 1.
</TDAG/CPS_WHERUSED_PURE_IO>-PART_NAME = 1.

ENDLOOP.

LOOP AT IT_/TDAG/CPS_WHERUSED_PURE_IO INTO WA_/TDAG/CPS_WHERUSED_PURE_IO.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/TDAG/CPS_WHERUSED_PURE_IO-PART_SALABLE, sy-vline,
  WA_/TDAG/CPS_WHERUSED_PURE_IO-SUPL_RECN, sy-vline,
  WA_/TDAG/CPS_WHERUSED_PURE_IO-SUPL_SUBID, sy-vline,
  WA_/TDAG/CPS_WHERUSED_PURE_IO-SUPL_ID, sy-vline,
  WA_/TDAG/CPS_WHERUSED_PURE_IO-SUPL_NAME, sy-vline,
  WA_/TDAG/CPS_WHERUSED_PURE_IO-SUPL_PARTNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/TDAG/CPS_WHERUSED_PURE_IO 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_/TDAG/CPS_WHERUSED_PURE_IO 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_/TDAG/CPS_WHERUSED_PURE_IO INTO WA_/TDAG/CPS_WHERUSED_PURE_IO.


*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 PART_RECN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WHERUSED_PURE_IO-PART_RECN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WHERUSED_PURE_IO-PART_RECN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SPEC1, internal->external for field PART_SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WHERUSED_PURE_IO-PART_SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WHERUSED_PURE_IO-PART_SUBID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field PART_NO
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WHERUSED_PURE_IO-PART_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WHERUSED_PURE_IO-PART_NO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit SPEC1, internal->external for field SUPL_SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WHERUSED_PURE_IO-SUPL_SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WHERUSED_PURE_IO-SUPL_SUBID.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit SPEC1, internal->external for field LOWEST_SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WHERUSED_PURE_IO-LOWEST_SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WHERUSED_PURE_IO-LOWEST_SUBID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit SPEC1, internal->external for field PURE_SUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WHERUSED_PURE_IO-PURE_SUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WHERUSED_PURE_IO-PURE_SUBID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PURE_PROPUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/TDAG/CPS_WHERUSED_PURE_IO-PURE_PROPUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/TDAG/CPS_WHERUSED_PURE_IO-PURE_PROPUNIT.
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_/TDAG/CPS_WHERUSED_PURE_IO_STR, 
PART_RECN TYPE STRING,
PART_SUBID TYPE STRING,
PART_SUBCAT TYPE STRING,
PART_NO TYPE STRING,
PART_NAME TYPE STRING,
PART_SALABLE TYPE STRING,
SUPL_RECN TYPE STRING,
SUPL_SUBID TYPE STRING,
SUPL_ID TYPE STRING,
SUPL_NAME TYPE STRING,
SUPL_PARTNO TYPE STRING,
SUPL_PARTNAME TYPE STRING,
LOWEST_RECN TYPE STRING,
LOWEST_SUBID TYPE STRING,
LOWEST_SUBCAT TYPE STRING,
LOWEST_NAME TYPE STRING,
PURE_RECN TYPE STRING,
PURE_SUBID TYPE STRING,
PURE_NAME TYPE STRING,
PURE_SUBCAT TYPE STRING,
PURE_SOURCE TYPE STRING,
PURE_COMPEXCVAL TYPE STRING,
PURE_COMPCAT TYPE STRING,
PURE_ORD TYPE STRING,
PURE_PRECLOW TYPE STRING,
PURE_PROPLOW TYPE STRING,
PURE_PROPAVG TYPE STRING,
PURE_PRECUPP TYPE STRING,
PURE_PROPUPP TYPE STRING,
PURE_PROPUNIT TYPE STRING,
MARK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/TDAG/CPS_WHERUSED_PURE_IO_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_/TDAG/CPS_WHERUSED_PURE_IO_STR-PART_RECN sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PART_SUBID sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PART_SUBCAT sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PART_NO sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PART_NAME sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PART_SALABLE sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-SUPL_RECN sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-SUPL_SUBID sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-SUPL_ID sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-SUPL_NAME sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-SUPL_PARTNO sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-SUPL_PARTNAME sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-LOWEST_RECN sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-LOWEST_SUBID sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-LOWEST_SUBCAT sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-LOWEST_NAME sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_RECN sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_SUBID sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_NAME sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_SUBCAT sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_SOURCE sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_COMPEXCVAL sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_COMPCAT sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_ORD sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_PRECLOW sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_PROPLOW sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_PROPAVG sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_PRECUPP sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_PROPUPP sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-PURE_PROPUNIT sy-vline 
WA_/TDAG/CPS_WHERUSED_PURE_IO_STR-MARK sy-vline      INTO ld_text SEPARATED BY SPACE.

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