ABAP Select data from SAP table ERTPIFACEINSTPAR 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 ERTPIFACEINSTPAR 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 ERTPIFACEINSTPAR. 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 ERTPIFACEINSTPAR 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_ERTPIFACEINSTPAR TYPE STANDARD TABLE OF ERTPIFACEINSTPAR,
      WA_ERTPIFACEINSTPAR TYPE ERTPIFACEINSTPAR,
      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: <ERTPIFACEINSTPAR> TYPE ERTPIFACEINSTPAR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERTPIFACEINSTPAR
*  INTO TABLE @DATA(IT_ERTPIFACEINSTPAR2).
*--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_ERTPIFACEINSTPAR INDEX 1 INTO DATA(WA_ERTPIFACEINSTPAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERTPIFACEINSTPAR>-MANDT = 1.
<ERTPIFACEINSTPAR>-ANLAGE = 1.
<ERTPIFACEINSTPAR>-RTPINTERFACE = 1.
<ERTPIFACEINSTPAR>-RTPCOMP = 1.
<ERTPIFACEINSTPAR>-PARNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERTPIFACEINSTPAR-RTPCOMPCODE, sy-vline,
  WA_ERTPIFACEINSTPAR-DATETO, sy-vline,
  WA_ERTPIFACEINSTPAR-TIMETO, sy-vline,
  WA_ERTPIFACEINSTPAR-DATEFROM, sy-vline,
  WA_ERTPIFACEINSTPAR-TIMEFROM, sy-vline,
  WA_ERTPIFACEINSTPAR-CONSTANT_VALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERTPIFACEINSTPAR 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_ERTPIFACEINSTPAR 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_ERTPIFACEINSTPAR INTO WA_ERTPIFACEINSTPAR.


*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 ANLAGE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ERTPIFACEINSTPAR-ANLAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ERTPIFACEINSTPAR-ANLAGE.
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_ERTPIFACEINSTPAR_STR, 
MANDT TYPE STRING,
ANLAGE TYPE STRING,
RTPINTERFACE TYPE STRING,
RTPCOMP TYPE STRING,
PARNUMBER TYPE STRING,
RTPCOMPCODE TYPE STRING,
DATETO TYPE STRING,
TIMETO TYPE STRING,
DATEFROM TYPE STRING,
TIMEFROM TYPE STRING,
CONSTANT_VALUE TYPE STRING,
PROFILE TYPE STRING,
PROFROLE TYPE STRING,
DAYTYPEXID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERTPIFACEINSTPAR_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_ERTPIFACEINSTPAR_STR-MANDT sy-vline 
WA_ERTPIFACEINSTPAR_STR-ANLAGE sy-vline 
WA_ERTPIFACEINSTPAR_STR-RTPINTERFACE sy-vline 
WA_ERTPIFACEINSTPAR_STR-RTPCOMP sy-vline 
WA_ERTPIFACEINSTPAR_STR-PARNUMBER sy-vline 
WA_ERTPIFACEINSTPAR_STR-RTPCOMPCODE sy-vline 
WA_ERTPIFACEINSTPAR_STR-DATETO sy-vline 
WA_ERTPIFACEINSTPAR_STR-TIMETO sy-vline 
WA_ERTPIFACEINSTPAR_STR-DATEFROM sy-vline 
WA_ERTPIFACEINSTPAR_STR-TIMEFROM sy-vline 
WA_ERTPIFACEINSTPAR_STR-CONSTANT_VALUE sy-vline 
WA_ERTPIFACEINSTPAR_STR-PROFILE sy-vline 
WA_ERTPIFACEINSTPAR_STR-PROFROLE sy-vline 
WA_ERTPIFACEINSTPAR_STR-DAYTYPEXID sy-vline      INTO ld_text SEPARATED BY SPACE.

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