ABAP Select data from SAP table CONV_NEW_FIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CONV_NEW_FIELDS
*  INTO TABLE @DATA(IT_CONV_NEW_FIELDS2).
*--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_CONV_NEW_FIELDS INDEX 1 INTO DATA(WA_CONV_NEW_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CONV_NEW_FIELDS>-SOFT_COMPONENT = 1.
<CONV_NEW_FIELDS>-REL = 1.
<CONV_NEW_FIELDS>-PACKID = 1.
<CONV_NEW_FIELDS>-TABNAME = 1.
<CONV_NEW_FIELDS>-FIELDNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CONV_NEW_FIELDS-ROLLNAME, sy-vline,
  WA_CONV_NEW_FIELDS-DOMNAME, sy-vline,
  WA_CONV_NEW_FIELDS-PACKAGE_DESC, sy-vline,
  WA_CONV_NEW_FIELDS-CONVTYPE, sy-vline,
  WA_CONV_NEW_FIELDS-CONVFUNC, sy-vline,
  WA_CONV_NEW_FIELDS-KEYFLAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CONV_NEW_FIELDS 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_CONV_NEW_FIELDS 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_CONV_NEW_FIELDS INTO WA_CONV_NEW_FIELDS.


*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_CONV_NEW_FIELDS_STR, 
SOFT_COMPONENT TYPE STRING,
REL TYPE STRING,
PACKID TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
ROLLNAME TYPE STRING,
DOMNAME TYPE STRING,
PACKAGE_DESC TYPE STRING,
CONVTYPE TYPE STRING,
CONVFUNC TYPE STRING,
KEYFLAG TYPE STRING,
SUMUP TYPE STRING,
ORD_DEV TYPE STRING,
NEW_TABLE TYPE STRING,
DT_OBJ_S TYPE STRING,
DT_TYPE_S TYPE STRING,
DTOBJ_S TYPE STRING,
PATHID TYPE STRING,
PATHTYPE TYPE STRING,
DTOBJ_T TYPE STRING,
RELATION TYPE STRING,
NOTANA TYPE STRING,
CHECK_STATUS TYPE STRING,
TRANS_SOL TYPE STRING,
TRANS_VER TYPE STRING,
CREATED TYPE STRING,
CRDATE TYPE STRING,
CRTIME TYPE STRING,
CRUSER TYPE STRING,
CHANGED TYPE STRING,
CHDATE TYPE STRING,
CHTIME TYPE STRING,
CHUSER TYPE STRING,
SOURCE TYPE STRING,
USER_NAME TYPE STRING,
CREATED_DATE TYPE STRING,
CREATED_TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CONV_NEW_FIELDS_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_CONV_NEW_FIELDS_STR-SOFT_COMPONENT sy-vline 
WA_CONV_NEW_FIELDS_STR-REL sy-vline 
WA_CONV_NEW_FIELDS_STR-PACKID sy-vline 
WA_CONV_NEW_FIELDS_STR-TABNAME sy-vline 
WA_CONV_NEW_FIELDS_STR-FIELDNAME sy-vline 
WA_CONV_NEW_FIELDS_STR-ROLLNAME sy-vline 
WA_CONV_NEW_FIELDS_STR-DOMNAME sy-vline 
WA_CONV_NEW_FIELDS_STR-PACKAGE_DESC sy-vline 
WA_CONV_NEW_FIELDS_STR-CONVTYPE sy-vline 
WA_CONV_NEW_FIELDS_STR-CONVFUNC sy-vline 
WA_CONV_NEW_FIELDS_STR-KEYFLAG sy-vline 
WA_CONV_NEW_FIELDS_STR-SUMUP sy-vline 
WA_CONV_NEW_FIELDS_STR-ORD_DEV sy-vline 
WA_CONV_NEW_FIELDS_STR-NEW_TABLE sy-vline 
WA_CONV_NEW_FIELDS_STR-DT_OBJ_S sy-vline 
WA_CONV_NEW_FIELDS_STR-DT_TYPE_S sy-vline 
WA_CONV_NEW_FIELDS_STR-DTOBJ_S sy-vline 
WA_CONV_NEW_FIELDS_STR-PATHID sy-vline 
WA_CONV_NEW_FIELDS_STR-PATHTYPE sy-vline 
WA_CONV_NEW_FIELDS_STR-DTOBJ_T sy-vline 
WA_CONV_NEW_FIELDS_STR-RELATION sy-vline 
WA_CONV_NEW_FIELDS_STR-NOTANA sy-vline 
WA_CONV_NEW_FIELDS_STR-CHECK_STATUS sy-vline 
WA_CONV_NEW_FIELDS_STR-TRANS_SOL sy-vline 
WA_CONV_NEW_FIELDS_STR-TRANS_VER sy-vline 
WA_CONV_NEW_FIELDS_STR-CREATED sy-vline 
WA_CONV_NEW_FIELDS_STR-CRDATE sy-vline 
WA_CONV_NEW_FIELDS_STR-CRTIME sy-vline 
WA_CONV_NEW_FIELDS_STR-CRUSER sy-vline 
WA_CONV_NEW_FIELDS_STR-CHANGED sy-vline 
WA_CONV_NEW_FIELDS_STR-CHDATE sy-vline 
WA_CONV_NEW_FIELDS_STR-CHTIME sy-vline 
WA_CONV_NEW_FIELDS_STR-CHUSER sy-vline 
WA_CONV_NEW_FIELDS_STR-SOURCE sy-vline 
WA_CONV_NEW_FIELDS_STR-USER_NAME sy-vline 
WA_CONV_NEW_FIELDS_STR-CREATED_DATE sy-vline 
WA_CONV_NEW_FIELDS_STR-CREATED_TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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