ABAP Select data from SAP table PRT_CLASS_DATA_INTERFACE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRT_CLASS_DATA_INTERFACE
*  INTO TABLE @DATA(IT_PRT_CLASS_DATA_INTERFACE2).
*--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_PRT_CLASS_DATA_INTERFACE INDEX 1 INTO DATA(WA_PRT_CLASS_DATA_INTERFACE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRT_CLASS_DATA_INTERFACE>-PLNTY = 1.
<PRT_CLASS_DATA_INTERFACE>-PLNNR = 1.
<PRT_CLASS_DATA_INTERFACE>-PLNAL = 1.
<PRT_CLASS_DATA_INTERFACE>-PLNFL = 1.
<PRT_CLASS_DATA_INTERFACE>-PZLFH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRT_CLASS_DATA_INTERFACE-AENNR, sy-vline,
  WA_PRT_CLASS_DATA_INTERFACE-DATUV, sy-vline,
  WA_PRT_CLASS_DATA_INTERFACE-AENNR_AUS, sy-vline,
  WA_PRT_CLASS_DATA_INTERFACE-DATUB, sy-vline,
  WA_PRT_CLASS_DATA_INTERFACE-LOEKZ, sy-vline,
  WA_PRT_CLASS_DATA_INTERFACE-VORNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRT_CLASS_DATA_INTERFACE 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_PRT_CLASS_DATA_INTERFACE 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_PRT_CLASS_DATA_INTERFACE INTO WA_PRT_CLASS_DATA_INTERFACE.


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

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

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

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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_PRT_CLASS_DATA_INTERFACE-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRT_CLASS_DATA_INTERFACE-VORNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRT_CLASS_DATA_INTERFACE-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRT_CLASS_DATA_INTERFACE-EQUNR.
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_PRT_CLASS_DATA_INTERFACE_STR, 
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
PLNFL TYPE STRING,
PZLFH TYPE STRING,
AENNR TYPE STRING,
DATUV TYPE STRING,
AENNR_AUS TYPE STRING,
DATUB TYPE STRING,
LOEKZ TYPE STRING,
VORNR TYPE STRING,
OPRID TYPE STRING,
OBJTY TYPE STRING,
OBJID TYPE STRING,
OBJCT TYPE STRING,
PSNFH TYPE STRING,
STEUF TYPE STRING,
KZKBL TYPE STRING,
BZOFFB TYPE STRING,
OFFSTB TYPE STRING,
EHOFFB TYPE STRING,
START_OFFSET_UNIT_ISO TYPE STRING,
BZOFFE TYPE STRING,
OFFSTE TYPE STRING,
EHOFFE TYPE STRING,
END_OFFSET_UNIT_ISO TYPE STRING,
MGEINH TYPE STRING,
PRT_MEASURE_UNIT_ISO TYPE STRING,
MGVGW TYPE STRING,
MGFORM TYPE STRING,
EWEINH TYPE STRING,
PRT_USAGE_VALUE_UNIT_ISO TYPE STRING,
EWVGW TYPE STRING,
EWFORM TYPE STRING,
KTSCH TYPE STRING,
TXTZ1 TYPE STRING,
FHMAR TYPE STRING,
FHMNR TYPE STRING,
FHWRK TYPE STRING,
MATNR TYPE STRING,
SFHNR TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKTL TYPE STRING,
DOKVR TYPE STRING,
EQUNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRT_CLASS_DATA_INTERFACE_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_PRT_CLASS_DATA_INTERFACE_STR-PLNTY sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-PLNNR sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-PLNAL sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-PLNFL sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-PZLFH sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-AENNR sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-DATUV sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-AENNR_AUS sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-DATUB sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-LOEKZ sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-VORNR sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-OPRID sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-OBJTY sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-OBJID sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-OBJCT sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-PSNFH sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-STEUF sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-KZKBL sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-BZOFFB sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-OFFSTB sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-EHOFFB sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-START_OFFSET_UNIT_ISO sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-BZOFFE sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-OFFSTE sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-EHOFFE sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-END_OFFSET_UNIT_ISO sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-MGEINH sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-PRT_MEASURE_UNIT_ISO sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-MGVGW sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-MGFORM sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-EWEINH sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-PRT_USAGE_VALUE_UNIT_ISO sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-EWVGW sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-EWFORM sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-KTSCH sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-TXTZ1 sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-FHMAR sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-FHMNR sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-FHWRK sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-MATNR sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-SFHNR sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-DOKAR sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-DOKNR sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-DOKTL sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-DOKVR sy-vline 
WA_PRT_CLASS_DATA_INTERFACE_STR-EQUNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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