ABAP Select data from SAP table EPREI_DISP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EPREI_DISP
*  INTO TABLE @DATA(IT_EPREI_DISP2).
*--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_EPREI_DISP INDEX 1 INTO DATA(WA_EPREI_DISP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EPREI_DISP>-MANDT = 1.
<EPREI_DISP>-TWAERS = 1.
<EPREI_DISP>-PREIS = 1.
<EPREI_DISP>-PREISTYP = 1.
<EPREI_DISP>-PREISTUF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EPREI_DISP-BISDATUM, sy-vline,
  WA_EPREI_DISP-VONZONE, sy-vline,
  WA_EPREI_DISP-BISZONE, sy-vline,
  WA_EPREI_DISP-ABDATUM, sy-vline,
  WA_EPREI_DISP-PREISBTR, sy-vline,
  WA_EPREI_DISP-ZONB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EPREI_DISP 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_EPREI_DISP 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_EPREI_DISP INTO WA_EPREI_DISP.


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

*Conversion exit CUNIT, internal->external for field MASS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EPREI_DISP-MASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EPREI_DISP-MASS.
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_EPREI_DISP_STR, 
MANDT TYPE STRING,
TWAERS TYPE STRING,
PREIS TYPE STRING,
PREISTYP TYPE STRING,
PREISTUF TYPE STRING,
BISDATUM TYPE STRING,
VONZONE TYPE STRING,
BISZONE TYPE STRING,
ABDATUM TYPE STRING,
PREISBTR TYPE STRING,
ZONB TYPE STRING,
MNGBASIS TYPE STRING,
SPARTE TYPE STRING,
MASS TYPE STRING,
AKLASSE TYPE STRING,
TIMBASIS TYPE STRING,
TIMTYP TYPE STRING,
PREIGKL TYPE STRING,
DPREIKZ TYPE STRING,
RUNDART TYPE STRING,
RUNDUNG TYPE STRING,
PREISART TYPE STRING,
TEXT30 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EPREI_DISP_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_EPREI_DISP_STR-MANDT sy-vline 
WA_EPREI_DISP_STR-TWAERS sy-vline 
WA_EPREI_DISP_STR-PREIS sy-vline 
WA_EPREI_DISP_STR-PREISTYP sy-vline 
WA_EPREI_DISP_STR-PREISTUF sy-vline 
WA_EPREI_DISP_STR-BISDATUM sy-vline 
WA_EPREI_DISP_STR-VONZONE sy-vline 
WA_EPREI_DISP_STR-BISZONE sy-vline 
WA_EPREI_DISP_STR-ABDATUM sy-vline 
WA_EPREI_DISP_STR-PREISBTR sy-vline 
WA_EPREI_DISP_STR-ZONB sy-vline 
WA_EPREI_DISP_STR-MNGBASIS sy-vline 
WA_EPREI_DISP_STR-SPARTE sy-vline 
WA_EPREI_DISP_STR-MASS sy-vline 
WA_EPREI_DISP_STR-AKLASSE sy-vline 
WA_EPREI_DISP_STR-TIMBASIS sy-vline 
WA_EPREI_DISP_STR-TIMTYP sy-vline 
WA_EPREI_DISP_STR-PREIGKL sy-vline 
WA_EPREI_DISP_STR-DPREIKZ sy-vline 
WA_EPREI_DISP_STR-RUNDART sy-vline 
WA_EPREI_DISP_STR-RUNDUNG sy-vline 
WA_EPREI_DISP_STR-PREISART sy-vline 
WA_EPREI_DISP_STR-TEXT30 sy-vline      INTO ld_text SEPARATED BY SPACE.

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