ABAP Select data from SAP table RN1PLAN 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 RN1PLAN 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 RN1PLAN. 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 RN1PLAN 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_RN1PLAN TYPE STANDARD TABLE OF RN1PLAN,
      WA_RN1PLAN TYPE RN1PLAN,
      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: <RN1PLAN> TYPE RN1PLAN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1PLAN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1PLAN
  INTO TABLE IT_RN1PLAN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1PLAN
*  INTO TABLE @DATA(IT_RN1PLAN2).
*--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_RN1PLAN INDEX 1 INTO DATA(WA_RN1PLAN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1PLAN ASSIGNING <RN1PLAN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1PLAN>-MANDT = 1.
<RN1PLAN>-EINRI = 1.
<RN1PLAN>-PLANKZ = 1.
<RN1PLAN>-PATNAME = 1.
<RN1PLAN>-ANKLEI = 1.

ENDLOOP.

LOOP AT IT_RN1PLAN INTO WA_RN1PLAN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1PLAN-FALNR, sy-vline,
  WA_RN1PLAN-LFDBEW, sy-vline,
  WA_RN1PLAN-TMNID, sy-vline,
  WA_RN1PLAN-ZIMMER, sy-vline,
  WA_RN1PLAN-RFG, sy-vline,
  WA_RN1PLAN-DAUER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1PLAN 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_RN1PLAN 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_RN1PLAN INTO WA_RN1PLAN.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PLAN-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PLAN-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANKLEI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PLAN-ANKLEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PLAN-ANKLEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PLAN-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PLAN-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TMNID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PLAN-TMNID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PLAN-TMNID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZIMMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PLAN-ZIMMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PLAN-ZIMMER.
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_RN1PLAN_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
PLANKZ TYPE STRING,
PATNAME TYPE STRING,
ANKLEI TYPE STRING,
FALNR TYPE STRING,
LFDBEW TYPE STRING,
TMNID TYPE STRING,
ZIMMER TYPE STRING,
RFG TYPE STRING,
DAUER TYPE STRING,
PBZEIT TYPE STRING,
PEZEIT TYPE STRING,
PZMAN TYPE STRING,
TERMINF TYPE STRING,
IFG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1PLAN_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_RN1PLAN_STR-MANDT sy-vline 
WA_RN1PLAN_STR-EINRI sy-vline 
WA_RN1PLAN_STR-PLANKZ sy-vline 
WA_RN1PLAN_STR-PATNAME sy-vline 
WA_RN1PLAN_STR-ANKLEI sy-vline 
WA_RN1PLAN_STR-FALNR sy-vline 
WA_RN1PLAN_STR-LFDBEW sy-vline 
WA_RN1PLAN_STR-TMNID sy-vline 
WA_RN1PLAN_STR-ZIMMER sy-vline 
WA_RN1PLAN_STR-RFG sy-vline 
WA_RN1PLAN_STR-DAUER sy-vline 
WA_RN1PLAN_STR-PBZEIT sy-vline 
WA_RN1PLAN_STR-PEZEIT sy-vline 
WA_RN1PLAN_STR-PZMAN sy-vline 
WA_RN1PLAN_STR-TERMINF sy-vline 
WA_RN1PLAN_STR-IFG sy-vline      INTO ld_text SEPARATED BY SPACE.

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