ABAP Select data from SAP table RN1APPLIST into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1APPLIST 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 RN1APPLIST. 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 RN1APPLIST 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_RN1APPLIST TYPE STANDARD TABLE OF RN1APPLIST,
      WA_RN1APPLIST TYPE RN1APPLIST,
      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: <RN1APPLIST> TYPE RN1APPLIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1APPLIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1APPLIST
  INTO TABLE IT_RN1APPLIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1APPLIST
*  INTO TABLE @DATA(IT_RN1APPLIST2).
*--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_RN1APPLIST INDEX 1 INTO DATA(WA_RN1APPLIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1APPLIST ASSIGNING <RN1APPLIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1APPLIST>-COLLKZ = 1.
<RN1APPLIST>-ICON = 1.
<RN1APPLIST>-N1DATE = 1.
<RN1APPLIST>-N1CDATE = 1.
<RN1APPLIST>-N1CEDATE = 1.

ENDLOOP.

LOOP AT IT_RN1APPLIST INTO WA_RN1APPLIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1APPLIST-BEGZT, sy-vline,
  WA_RN1APPLIST-ENDZT, sy-vline,
  WA_RN1APPLIST-BTIME, sy-vline,
  WA_RN1APPLIST-ETIME, sy-vline,
  WA_RN1APPLIST-POBNR_NAME, sy-vline,
  WA_RN1APPLIST-ORGID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1APPLIST 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_RN1APPLIST 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_RN1APPLIST INTO WA_RN1APPLIST.


*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 ORGID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPLIST-ORGID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPLIST-ORGID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROOM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPLIST-ROOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPLIST-ROOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PERNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPLIST-PERNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPLIST-PERNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TMNID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPLIST-TMNID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPLIST-TMNID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPLIST-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPLIST-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CHAINID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPLIST-CHAINID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPLIST-CHAINID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPLIST-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPLIST-PATNR.
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_RN1APPLIST_STR, 
COLLKZ TYPE STRING,
ICON TYPE STRING,
N1DATE TYPE STRING,
N1CDATE TYPE STRING,
N1CEDATE TYPE STRING,
BEGZT TYPE STRING,
ENDZT TYPE STRING,
BTIME TYPE STRING,
ETIME TYPE STRING,
POBNR_NAME TYPE STRING,
ORGID TYPE STRING,
ORGID_NAME TYPE STRING,
BEWTY TYPE STRING,
BEWTX TYPE STRING,
DAUER TYPE STRING,
ROOM TYPE STRING,
ROOM_NAME TYPE STRING,
PERNR TYPE STRING,
PERNR_NAME TYPE STRING,
POBNR TYPE STRING,
TPART TYPE STRING,
TMNID TYPE STRING,
APP_OBJECT TYPE STRING,
MOV_OBJECT TYPE STRING,
FALNR TYPE STRING,
LFDNR TYPE STRING,
TEXT TYPE STRING,
CHAINID TYPE STRING,
COLOR TYPE STRING,
PATNR TYPE STRING,
BWEDT TYPE STRING,
COLLISION TYPE STRING,
ANFVORH TYPE STRING,
SELBUT TYPE STRING,
T_STYLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1APPLIST_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_RN1APPLIST_STR-COLLKZ sy-vline 
WA_RN1APPLIST_STR-ICON sy-vline 
WA_RN1APPLIST_STR-N1DATE sy-vline 
WA_RN1APPLIST_STR-N1CDATE sy-vline 
WA_RN1APPLIST_STR-N1CEDATE sy-vline 
WA_RN1APPLIST_STR-BEGZT sy-vline 
WA_RN1APPLIST_STR-ENDZT sy-vline 
WA_RN1APPLIST_STR-BTIME sy-vline 
WA_RN1APPLIST_STR-ETIME sy-vline 
WA_RN1APPLIST_STR-POBNR_NAME sy-vline 
WA_RN1APPLIST_STR-ORGID sy-vline 
WA_RN1APPLIST_STR-ORGID_NAME sy-vline 
WA_RN1APPLIST_STR-BEWTY sy-vline 
WA_RN1APPLIST_STR-BEWTX sy-vline 
WA_RN1APPLIST_STR-DAUER sy-vline 
WA_RN1APPLIST_STR-ROOM sy-vline 
WA_RN1APPLIST_STR-ROOM_NAME sy-vline 
WA_RN1APPLIST_STR-PERNR sy-vline 
WA_RN1APPLIST_STR-PERNR_NAME sy-vline 
WA_RN1APPLIST_STR-POBNR sy-vline 
WA_RN1APPLIST_STR-TPART sy-vline 
WA_RN1APPLIST_STR-TMNID sy-vline 
WA_RN1APPLIST_STR-APP_OBJECT sy-vline 
WA_RN1APPLIST_STR-MOV_OBJECT sy-vline 
WA_RN1APPLIST_STR-FALNR sy-vline 
WA_RN1APPLIST_STR-LFDNR sy-vline 
WA_RN1APPLIST_STR-TEXT sy-vline 
WA_RN1APPLIST_STR-CHAINID sy-vline 
WA_RN1APPLIST_STR-COLOR sy-vline 
WA_RN1APPLIST_STR-PATNR sy-vline 
WA_RN1APPLIST_STR-BWEDT sy-vline 
WA_RN1APPLIST_STR-COLLISION sy-vline 
WA_RN1APPLIST_STR-ANFVORH sy-vline 
WA_RN1APPLIST_STR-SELBUT sy-vline 
WA_RN1APPLIST_STR-T_STYLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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