ABAP Select data from SAP table RECN_RENEWAL_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECN_RENEWAL_L
*  INTO TABLE @DATA(IT_RECN_RENEWAL_L2).
*--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_RECN_RENEWAL_L INDEX 1 INTO DATA(WA_RECN_RENEWAL_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECN_RENEWAL_L>-MANDT = 1.
<RECN_RENEWAL_L>-INTRENO = 1.
<RECN_RENEWAL_L>-RNNO = 1.
<RECN_RENEWAL_L>-RNRULETYPE = 1.
<RECN_RENEWAL_L>-RNENDOLD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECN_RENEWAL_L-RNNOTDATE, sy-vline,
  WA_RECN_RENEWAL_L-RNENDNEW, sy-vline,
  WA_RECN_RENEWAL_L-RNACTIVE, sy-vline,
  WA_RECN_RENEWAL_L-RNACTIVATEDON, sy-vline,
  WA_RECN_RENEWAL_L-RNREVERSEDON, sy-vline,
  WA_RECN_RENEWAL_L-RERF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECN_RENEWAL_L 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_RECN_RENEWAL_L 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_RECN_RENEWAL_L INTO WA_RECN_RENEWAL_L.


*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_RECN_RENEWAL_L_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
RNNO TYPE STRING,
RNRULETYPE TYPE STRING,
RNENDOLD TYPE STRING,
RNNOTDATE TYPE STRING,
RNENDNEW TYPE STRING,
RNACTIVE TYPE STRING,
RNACTIVATEDON TYPE STRING,
RNREVERSEDON TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
RNDECISION TYPE STRING,
RNDECISIONON TYPE STRING,
XRNRULETYPE TYPE STRING,
XRNDECISION TYPE STRING,
HASNOTE TYPE STRING,
ICONHASNOTE TYPE STRING,
ICONRNNOTDATE TYPE STRING,
ICONRNDECISION TYPE STRING,
ICON_DETAIL TYPE STRING,
COLOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECN_RENEWAL_L_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_RECN_RENEWAL_L_STR-MANDT sy-vline 
WA_RECN_RENEWAL_L_STR-INTRENO sy-vline 
WA_RECN_RENEWAL_L_STR-RNNO sy-vline 
WA_RECN_RENEWAL_L_STR-RNRULETYPE sy-vline 
WA_RECN_RENEWAL_L_STR-RNENDOLD sy-vline 
WA_RECN_RENEWAL_L_STR-RNNOTDATE sy-vline 
WA_RECN_RENEWAL_L_STR-RNENDNEW sy-vline 
WA_RECN_RENEWAL_L_STR-RNACTIVE sy-vline 
WA_RECN_RENEWAL_L_STR-RNACTIVATEDON sy-vline 
WA_RECN_RENEWAL_L_STR-RNREVERSEDON sy-vline 
WA_RECN_RENEWAL_L_STR-RERF sy-vline 
WA_RECN_RENEWAL_L_STR-DERF sy-vline 
WA_RECN_RENEWAL_L_STR-TERF sy-vline 
WA_RECN_RENEWAL_L_STR-REHER sy-vline 
WA_RECN_RENEWAL_L_STR-RBEAR sy-vline 
WA_RECN_RENEWAL_L_STR-DBEAR sy-vline 
WA_RECN_RENEWAL_L_STR-TBEAR sy-vline 
WA_RECN_RENEWAL_L_STR-RBHER sy-vline 
WA_RECN_RENEWAL_L_STR-RNDECISION sy-vline 
WA_RECN_RENEWAL_L_STR-RNDECISIONON sy-vline 
WA_RECN_RENEWAL_L_STR-XRNRULETYPE sy-vline 
WA_RECN_RENEWAL_L_STR-XRNDECISION sy-vline 
WA_RECN_RENEWAL_L_STR-HASNOTE sy-vline 
WA_RECN_RENEWAL_L_STR-ICONHASNOTE sy-vline 
WA_RECN_RENEWAL_L_STR-ICONRNNOTDATE sy-vline 
WA_RECN_RENEWAL_L_STR-ICONRNDECISION sy-vline 
WA_RECN_RENEWAL_L_STR-ICON_DETAIL sy-vline 
WA_RECN_RENEWAL_L_STR-COLOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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