ABAP Select data from SAP table V_RECNCNB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_RECNCNB
*  INTO TABLE @DATA(IT_V_RECNCNB2).
*--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_V_RECNCNB INDEX 1 INTO DATA(WA_V_RECNCNB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_RECNCNB>-MANDT = 1.
<V_RECNCNB>-INTRENO = 1.
<V_RECNCNB>-OBJNR = 1.
<V_RECNCNB>-STAT = 1.
<V_RECNCNB>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_RECNCNB-RECNTYPE, sy-vline,
  WA_V_RECNCNB-RECNNR, sy-vline,
  WA_V_RECNCNB-RECNBEG, sy-vline,
  WA_V_RECNCNB-RECNENDABS, sy-vline,
  WA_V_RECNCNB-RECNTXT, sy-vline,
  WA_V_RECNCNB-INDUSTRY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_RECNCNB 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_V_RECNCNB 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_V_RECNCNB INTO WA_V_RECNCNB.


*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 ALPHA, internal->external for field RECNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RECNCNB-RECNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RECNCNB-RECNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field RECNENDABS
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_V_RECNCNB-RECNENDABS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RECNCNB-RECNENDABS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNNRCOLLECT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RECNCNB-RECNNRCOLLECT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RECNCNB-RECNNRCOLLECT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNTXTOLD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RECNCNB-RECNTXTOLD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RECNCNB-RECNTXTOLD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SWENR, internal->external for field BENOCN
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_V_RECNCNB-BENOCN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RECNCNB-BENOCN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_V_RECNCNB-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RECNCNB-IMKEY.
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_V_RECNCNB_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
OBJNR TYPE STRING,
STAT TYPE STRING,
BUKRS TYPE STRING,
RECNTYPE TYPE STRING,
RECNNR TYPE STRING,
RECNBEG TYPE STRING,
RECNENDABS TYPE STRING,
RECNTXT TYPE STRING,
INDUSTRY TYPE STRING,
SRRELEVANT TYPE STRING,
RECNNOTPER TYPE STRING,
RECNNOTREASON TYPE STRING,
RESPONSIBLE TYPE STRING,
AUTHGRP TYPE STRING,
RECNBUKRSCOLLECT TYPE STRING,
RECNNRCOLLECT TYPE STRING,
RECNTXTOLD TYPE STRING,
BENOCN TYPE STRING,
IMKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_RECNCNB_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_V_RECNCNB_STR-MANDT sy-vline 
WA_V_RECNCNB_STR-INTRENO sy-vline 
WA_V_RECNCNB_STR-OBJNR sy-vline 
WA_V_RECNCNB_STR-STAT sy-vline 
WA_V_RECNCNB_STR-BUKRS sy-vline 
WA_V_RECNCNB_STR-RECNTYPE sy-vline 
WA_V_RECNCNB_STR-RECNNR sy-vline 
WA_V_RECNCNB_STR-RECNBEG sy-vline 
WA_V_RECNCNB_STR-RECNENDABS sy-vline 
WA_V_RECNCNB_STR-RECNTXT sy-vline 
WA_V_RECNCNB_STR-INDUSTRY sy-vline 
WA_V_RECNCNB_STR-SRRELEVANT sy-vline 
WA_V_RECNCNB_STR-RECNNOTPER sy-vline 
WA_V_RECNCNB_STR-RECNNOTREASON sy-vline 
WA_V_RECNCNB_STR-RESPONSIBLE sy-vline 
WA_V_RECNCNB_STR-AUTHGRP sy-vline 
WA_V_RECNCNB_STR-RECNBUKRSCOLLECT sy-vline 
WA_V_RECNCNB_STR-RECNNRCOLLECT sy-vline 
WA_V_RECNCNB_STR-RECNTXTOLD sy-vline 
WA_V_RECNCNB_STR-BENOCN sy-vline 
WA_V_RECNCNB_STR-IMKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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