ABAP Select data from SAP table EPARAMVALUES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EPARAMVALUES
*  INTO TABLE @DATA(IT_EPARAMVALUES2).
*--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_EPARAMVALUES INDEX 1 INTO DATA(WA_EPARAMVALUES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EPARAMVALUES>-PARNUMBER = 1.
<EPARAMVALUES>-OPTYP = 1.
<EPARAMVALUES>-BILLINGPROC = 1.
<EPARAMVALUES>-RATINGPROC = 1.
<EPARAMVALUES>-DATEFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EPARAMVALUES-TIMEFROM, sy-vline,
  WA_EPARAMVALUES-DATETO, sy-vline,
  WA_EPARAMVALUES-TIMETO, sy-vline,
  WA_EPARAMVALUES-VALUE, sy-vline,
  WA_EPARAMVALUES-STRING, sy-vline,
  WA_EPARAMVALUES-MASS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EPARAMVALUES 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_EPARAMVALUES 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_EPARAMVALUES INTO WA_EPARAMVALUES.


*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 CUNIT, internal->external for field MASS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EPARAMVALUES-MASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EPARAMVALUES-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_EPARAMVALUES_STR, 
PARNUMBER TYPE STRING,
OPTYP TYPE STRING,
BILLINGPROC TYPE STRING,
RATINGPROC TYPE STRING,
DATEFROM TYPE STRING,
TIMEFROM TYPE STRING,
DATETO TYPE STRING,
TIMETO TYPE STRING,
VALUE TYPE STRING,
STRING TYPE STRING,
MASS TYPE STRING,
WAERS TYPE STRING,
CONSTYPE TYPE STRING,
NOPRORATION TYPE STRING,
PARNAME TYPE STRING,
APPLSTRUCT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EPARAMVALUES_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_EPARAMVALUES_STR-PARNUMBER sy-vline 
WA_EPARAMVALUES_STR-OPTYP sy-vline 
WA_EPARAMVALUES_STR-BILLINGPROC sy-vline 
WA_EPARAMVALUES_STR-RATINGPROC sy-vline 
WA_EPARAMVALUES_STR-DATEFROM sy-vline 
WA_EPARAMVALUES_STR-TIMEFROM sy-vline 
WA_EPARAMVALUES_STR-DATETO sy-vline 
WA_EPARAMVALUES_STR-TIMETO sy-vline 
WA_EPARAMVALUES_STR-VALUE sy-vline 
WA_EPARAMVALUES_STR-STRING sy-vline 
WA_EPARAMVALUES_STR-MASS sy-vline 
WA_EPARAMVALUES_STR-WAERS sy-vline 
WA_EPARAMVALUES_STR-CONSTYPE sy-vline 
WA_EPARAMVALUES_STR-NOPRORATION sy-vline 
WA_EPARAMVALUES_STR-PARNAME sy-vline 
WA_EPARAMVALUES_STR-APPLSTRUCT sy-vline      INTO ld_text SEPARATED BY SPACE.

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