ABAP Select data from SAP table CNV_PE_S_IF_PAR_PROPERTIES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_PE_S_IF_PAR_PROPERTIES
*  INTO TABLE @DATA(IT_CNV_PE_S_IF_PAR_PROPERTIES2).
*--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_CNV_PE_S_IF_PAR_PROPERTIES INDEX 1 INTO DATA(WA_CNV_PE_S_IF_PAR_PROPERTIES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_PE_S_IF_PAR_PROPERTIES>-NAME = 1.
<CNV_PE_S_IF_PAR_PROPERTIES>-KIND = 1.
<CNV_PE_S_IF_PAR_PROPERTIES>-TYPE = 1.
<CNV_PE_S_IF_PAR_PROPERTIES>-IS_KEY = 1.
<CNV_PE_S_IF_PAR_PROPERTIES>-PAR_NR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_PE_S_IF_PAR_PROPERTIES-TYPEKIND, sy-vline,
  WA_CNV_PE_S_IF_PAR_PROPERTIES-TYPENAME, sy-vline,
  WA_CNV_PE_S_IF_PAR_PROPERTIES-OPTIONAL, sy-vline,
  WA_CNV_PE_S_IF_PAR_PROPERTIES-INACTIVE, sy-vline,
  WA_CNV_PE_S_IF_PAR_PROPERTIES-TECHNICAL, sy-vline,
  WA_CNV_PE_S_IF_PAR_PROPERTIES-LOCKED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNV_PE_S_IF_PAR_PROPERTIES 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_CNV_PE_S_IF_PAR_PROPERTIES 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_CNV_PE_S_IF_PAR_PROPERTIES INTO WA_CNV_PE_S_IF_PAR_PROPERTIES.


*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_CNV_PE_S_IF_PAR_PROPERTIES_STR, 
NAME TYPE STRING,
KIND TYPE STRING,
TYPE TYPE STRING,
IS_KEY TYPE STRING,
PAR_NR TYPE STRING,
TYPEKIND TYPE STRING,
TYPENAME TYPE STRING,
OPTIONAL TYPE STRING,
INACTIVE TYPE STRING,
TECHNICAL TYPE STRING,
LOCKED TYPE STRING,
EXTENSION TYPE STRING,
RETEVAL TYPE STRING,
READONLY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_PE_S_IF_PAR_PROPERTIES_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_CNV_PE_S_IF_PAR_PROPERTIES_STR-NAME sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-KIND sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-TYPE sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-IS_KEY sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-PAR_NR sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-TYPEKIND sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-TYPENAME sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-OPTIONAL sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-INACTIVE sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-TECHNICAL sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-LOCKED sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-EXTENSION sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-RETEVAL sy-vline 
WA_CNV_PE_S_IF_PAR_PROPERTIES_STR-READONLY sy-vline      INTO ld_text SEPARATED BY SPACE.

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