ABAP Select data from SAP table EWASFUNCPARAM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWASFUNCPARAM
*  INTO TABLE @DATA(IT_EWASFUNCPARAM2).
*--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_EWASFUNCPARAM INDEX 1 INTO DATA(WA_EWASFUNCPARAM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWASFUNCPARAM>-FUNCNAME = 1.
<EWASFUNCPARAM>-R3STATE = 1.
<EWASFUNCPARAM>-PARAMETER = 1.
<EWASFUNCPARAM>-PARAMTYPE = 1.
<EWASFUNCPARAM>-STRUCTURE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWASFUNCPARAM-DEFAULTVAL, sy-vline,
  WA_EWASFUNCPARAM-REFERENCE, sy-vline,
  WA_EWASFUNCPARAM-PPOSITION, sy-vline,
  WA_EWASFUNCPARAM-OPTIONAL, sy-vline,
  WA_EWASFUNCPARAM-TYPE, sy-vline,
  WA_EWASFUNCPARAM-CLASS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWASFUNCPARAM 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_EWASFUNCPARAM 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_EWASFUNCPARAM INTO WA_EWASFUNCPARAM.


*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_EWASFUNCPARAM_STR, 
FUNCNAME TYPE STRING,
R3STATE TYPE STRING,
PARAMETER TYPE STRING,
PARAMTYPE TYPE STRING,
STRUCTURE TYPE STRING,
DEFAULTVAL TYPE STRING,
REFERENCE TYPE STRING,
PPOSITION TYPE STRING,
OPTIONAL TYPE STRING,
TYPE TYPE STRING,
CLASS TYPE STRING,
REF_CLASS TYPE STRING,
LINE_OF TYPE STRING,
TABLE_OF TYPE STRING,
RESFLAG1 TYPE STRING,
RESFLAG2 TYPE STRING,
RESFLAG3 TYPE STRING,
RESFLAG4 TYPE STRING,
RESFLAG5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWASFUNCPARAM_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_EWASFUNCPARAM_STR-FUNCNAME sy-vline 
WA_EWASFUNCPARAM_STR-R3STATE sy-vline 
WA_EWASFUNCPARAM_STR-PARAMETER sy-vline 
WA_EWASFUNCPARAM_STR-PARAMTYPE sy-vline 
WA_EWASFUNCPARAM_STR-STRUCTURE sy-vline 
WA_EWASFUNCPARAM_STR-DEFAULTVAL sy-vline 
WA_EWASFUNCPARAM_STR-REFERENCE sy-vline 
WA_EWASFUNCPARAM_STR-PPOSITION sy-vline 
WA_EWASFUNCPARAM_STR-OPTIONAL sy-vline 
WA_EWASFUNCPARAM_STR-TYPE sy-vline 
WA_EWASFUNCPARAM_STR-CLASS sy-vline 
WA_EWASFUNCPARAM_STR-REF_CLASS sy-vline 
WA_EWASFUNCPARAM_STR-LINE_OF sy-vline 
WA_EWASFUNCPARAM_STR-TABLE_OF sy-vline 
WA_EWASFUNCPARAM_STR-RESFLAG1 sy-vline 
WA_EWASFUNCPARAM_STR-RESFLAG2 sy-vline 
WA_EWASFUNCPARAM_STR-RESFLAG3 sy-vline 
WA_EWASFUNCPARAM_STR-RESFLAG4 sy-vline 
WA_EWASFUNCPARAM_STR-RESFLAG5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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