ABAP Select data from SAP table ERTPINTERFACEDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERTPINTERFACEDATA
*  INTO TABLE @DATA(IT_ERTPINTERFACEDATA2).
*--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_ERTPINTERFACEDATA INDEX 1 INTO DATA(WA_ERTPINTERFACEDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERTPINTERFACEDATA>-RTPINTERFACE = 1.
<ERTPINTERFACEDATA>-HEAD = 1.
<ERTPINTERFACEDATA>-MANDT = 1.
<ERTPINTERFACEDATA>-RTPINTERFACE = 1.
<ERTPINTERFACEDATA>-FORMULA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERTPINTERFACEDATA-INTSIZEID, sy-vline,
  WA_ERTPINTERFACEDATA-SPARTE, sy-vline,
  WA_ERTPINTERFACEDATA-DAY_OFFSET, sy-vline,
  WA_ERTPINTERFACEDATA-INTSIZETYPE, sy-vline,
  WA_ERTPINTERFACEDATA-INTSIZE, sy-vline,
  WA_ERTPINTERFACEDATA-TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERTPINTERFACEDATA 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_ERTPINTERFACEDATA 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_ERTPINTERFACEDATA INTO WA_ERTPINTERFACEDATA.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ERTPINTERFACEDATA_STR, 
RTPINTERFACE TYPE STRING,
HEAD TYPE STRING,
MANDT TYPE STRING,
RTPINTERFACE TYPE STRING,
FORMULA TYPE STRING,
INTSIZEID TYPE STRING,
SPARTE TYPE STRING,
DAY_OFFSET TYPE STRING,
INTSIZETYPE TYPE STRING,
INTSIZE TYPE STRING,
TEXT TYPE STRING,
INTSIZETEXT TYPE STRING,
IRESULT TYPE STRING,
ICOMP TYPE STRING,
ICOMPHIS TYPE STRING,
ICOMPDATA TYPE STRING,
IINP TYPE STRING,
IOUT TYPE STRING,
ITEMP TYPE STRING,
HIDDENCODE TYPE STRING,
ETRFRTP TYPE STRING,
INTERFACE TYPE STRING,
RTPCATEGORY TYPE STRING,
EMDUSDIFRES TYPE STRING,
EMDUSDIFREST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERTPINTERFACEDATA_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_ERTPINTERFACEDATA_STR-RTPINTERFACE sy-vline 
WA_ERTPINTERFACEDATA_STR-HEAD sy-vline 
WA_ERTPINTERFACEDATA_STR-MANDT sy-vline 
WA_ERTPINTERFACEDATA_STR-RTPINTERFACE sy-vline 
WA_ERTPINTERFACEDATA_STR-FORMULA sy-vline 
WA_ERTPINTERFACEDATA_STR-INTSIZEID sy-vline 
WA_ERTPINTERFACEDATA_STR-SPARTE sy-vline 
WA_ERTPINTERFACEDATA_STR-DAY_OFFSET sy-vline 
WA_ERTPINTERFACEDATA_STR-INTSIZETYPE sy-vline 
WA_ERTPINTERFACEDATA_STR-INTSIZE sy-vline 
WA_ERTPINTERFACEDATA_STR-TEXT sy-vline 
WA_ERTPINTERFACEDATA_STR-INTSIZETEXT sy-vline 
WA_ERTPINTERFACEDATA_STR-IRESULT sy-vline 
WA_ERTPINTERFACEDATA_STR-ICOMP sy-vline 
WA_ERTPINTERFACEDATA_STR-ICOMPHIS sy-vline 
WA_ERTPINTERFACEDATA_STR-ICOMPDATA sy-vline 
WA_ERTPINTERFACEDATA_STR-IINP sy-vline 
WA_ERTPINTERFACEDATA_STR-IOUT sy-vline 
WA_ERTPINTERFACEDATA_STR-ITEMP sy-vline 
WA_ERTPINTERFACEDATA_STR-HIDDENCODE sy-vline 
WA_ERTPINTERFACEDATA_STR-ETRFRTP sy-vline 
WA_ERTPINTERFACEDATA_STR-INTERFACE sy-vline 
WA_ERTPINTERFACEDATA_STR-RTPCATEGORY sy-vline 
WA_ERTPINTERFACEDATA_STR-EMDUSDIFRES sy-vline 
WA_ERTPINTERFACEDATA_STR-EMDUSDIFREST sy-vline      INTO ld_text SEPARATED BY SPACE.

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