ABAP Select data from SAP table ENHMETHPARAM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENHMETHPARAM
*  INTO TABLE @DATA(IT_ENHMETHPARAM2).
*--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_ENHMETHPARAM INDEX 1 INTO DATA(WA_ENHMETHPARAM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENHMETHPARAM>-CLSNAME = 1.
<ENHMETHPARAM>-CMPNAME = 1.
<ENHMETHPARAM>-SCONAME = 1.
<ENHMETHPARAM>-VERSION = 1.
<ENHMETHPARAM>-LANGU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENHMETHPARAM-DESCRIPT, sy-vline,
  WA_ENHMETHPARAM-MTDTYPE, sy-vline,
  WA_ENHMETHPARAM-EDITORDER, sy-vline,
  WA_ENHMETHPARAM-AUTHOR, sy-vline,
  WA_ENHMETHPARAM-CREATEDON, sy-vline,
  WA_ENHMETHPARAM-CHANGEDBY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENHMETHPARAM 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_ENHMETHPARAM 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_ENHMETHPARAM INTO WA_ENHMETHPARAM.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ENHMETHPARAM-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENHMETHPARAM-LANGU.
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_ENHMETHPARAM_STR, 
CLSNAME TYPE STRING,
CMPNAME TYPE STRING,
SCONAME TYPE STRING,
VERSION TYPE STRING,
LANGU TYPE STRING,
DESCRIPT TYPE STRING,
MTDTYPE TYPE STRING,
EDITORDER TYPE STRING,
AUTHOR TYPE STRING,
CREATEDON TYPE STRING,
CHANGEDBY TYPE STRING,
CHANGEDON TYPE STRING,
PARDECLTYP TYPE STRING,
PARPASSTYP TYPE STRING,
TYPTYPE TYPE STRING,
TYPE TYPE STRING,
TABLEOF TYPE STRING,
PARVALUE TYPE STRING,
PAROPTIONL TYPE STRING,
PARPREFERD TYPE STRING,
LOCKED TYPE STRING,
ENHANCEMENT TYPE STRING,
DESCRIPT_ID TYPE STRING,
DOCU_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENHMETHPARAM_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_ENHMETHPARAM_STR-CLSNAME sy-vline 
WA_ENHMETHPARAM_STR-CMPNAME sy-vline 
WA_ENHMETHPARAM_STR-SCONAME sy-vline 
WA_ENHMETHPARAM_STR-VERSION sy-vline 
WA_ENHMETHPARAM_STR-LANGU sy-vline 
WA_ENHMETHPARAM_STR-DESCRIPT sy-vline 
WA_ENHMETHPARAM_STR-MTDTYPE sy-vline 
WA_ENHMETHPARAM_STR-EDITORDER sy-vline 
WA_ENHMETHPARAM_STR-AUTHOR sy-vline 
WA_ENHMETHPARAM_STR-CREATEDON sy-vline 
WA_ENHMETHPARAM_STR-CHANGEDBY sy-vline 
WA_ENHMETHPARAM_STR-CHANGEDON sy-vline 
WA_ENHMETHPARAM_STR-PARDECLTYP sy-vline 
WA_ENHMETHPARAM_STR-PARPASSTYP sy-vline 
WA_ENHMETHPARAM_STR-TYPTYPE sy-vline 
WA_ENHMETHPARAM_STR-TYPE sy-vline 
WA_ENHMETHPARAM_STR-TABLEOF sy-vline 
WA_ENHMETHPARAM_STR-PARVALUE sy-vline 
WA_ENHMETHPARAM_STR-PAROPTIONL sy-vline 
WA_ENHMETHPARAM_STR-PARPREFERD sy-vline 
WA_ENHMETHPARAM_STR-LOCKED sy-vline 
WA_ENHMETHPARAM_STR-ENHANCEMENT sy-vline 
WA_ENHMETHPARAM_STR-DESCRIPT_ID sy-vline 
WA_ENHMETHPARAM_STR-DOCU_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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