ABAP Select data from SAP table RN1ME_EVT_SELECTION_GRID into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1ME_EVT_SELECTION_GRID 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 RN1ME_EVT_SELECTION_GRID. 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 RN1ME_EVT_SELECTION_GRID 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_RN1ME_EVT_SELECTION_GRID TYPE STANDARD TABLE OF RN1ME_EVT_SELECTION_GRID,
      WA_RN1ME_EVT_SELECTION_GRID TYPE RN1ME_EVT_SELECTION_GRID,
      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: <RN1ME_EVT_SELECTION_GRID> TYPE RN1ME_EVT_SELECTION_GRID.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1ME_EVT_SELECTION_GRID.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1ME_EVT_SELECTION_GRID
  INTO TABLE IT_RN1ME_EVT_SELECTION_GRID.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1ME_EVT_SELECTION_GRID
*  INTO TABLE @DATA(IT_RN1ME_EVT_SELECTION_GRID2).
*--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_RN1ME_EVT_SELECTION_GRID INDEX 1 INTO DATA(WA_RN1ME_EVT_SELECTION_GRID2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1ME_EVT_SELECTION_GRID ASSIGNING <RN1ME_EVT_SELECTION_GRID>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1ME_EVT_SELECTION_GRID>-ROW_ID = 1.
<RN1ME_EVT_SELECTION_GRID>-R_BC_PATEVT = 1.
<RN1ME_EVT_SELECTION_GRID>-PATNR_BC = 1.
<RN1ME_EVT_SELECTION_GRID>-EVTID_BC = 1.
<RN1ME_EVT_SELECTION_GRID>-PATNR = 1.

ENDLOOP.

LOOP AT IT_RN1ME_EVT_SELECTION_GRID INTO WA_RN1ME_EVT_SELECTION_GRID.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1ME_EVT_SELECTION_GRID-PATNAME, sy-vline,
  WA_RN1ME_EVT_SELECTION_GRID-NNAME, sy-vline,
  WA_RN1ME_EVT_SELECTION_GRID-VNAME, sy-vline,
  WA_RN1ME_EVT_SELECTION_GRID-GSCHLE, sy-vline,
  WA_RN1ME_EVT_SELECTION_GRID-GBDAT, sy-vline,
  WA_RN1ME_EVT_SELECTION_GRID-ROOM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1ME_EVT_SELECTION_GRID 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_RN1ME_EVT_SELECTION_GRID 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_RN1ME_EVT_SELECTION_GRID INTO WA_RN1ME_EVT_SELECTION_GRID.


*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 PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ME_EVT_SELECTION_GRID-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ME_EVT_SELECTION_GRID-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ROOM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ME_EVT_SELECTION_GRID-ROOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ME_EVT_SELECTION_GRID-ROOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BED
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ME_EVT_SELECTION_GRID-BED
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ME_EVT_SELECTION_GRID-BED.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ME_EVT_SELECTION_GRID-ORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ME_EVT_SELECTION_GRID-ORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ME_EVT_SELECTION_GRID-ORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ME_EVT_SELECTION_GRID-ORGFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ME12D, internal->external for field PDRUGDQ
CALL FUNCTION 'CONVERSION_EXIT_ME12D_OUTPUT'
  EXPORTING
    input =                      WA_RN1ME_EVT_SELECTION_GRID-PDRUGDQ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ME_EVT_SELECTION_GRID-PDRUGDQ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MEQUA, internal->external for field CUR_ADRATE
CALL FUNCTION 'CONVERSION_EXIT_MEQUA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ME_EVT_SELECTION_GRID-CUR_ADRATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ME_EVT_SELECTION_GRID-CUR_ADRATE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MEQUA, internal->external for field NEXT_ADRATE
CALL FUNCTION 'CONVERSION_EXIT_MEQUA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ME_EVT_SELECTION_GRID-NEXT_ADRATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ME_EVT_SELECTION_GRID-NEXT_ADRATE.
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_RN1ME_EVT_SELECTION_GRID_STR, 
ROW_ID TYPE STRING,
R_BC_PATEVT TYPE STRING,
PATNR_BC TYPE STRING,
EVTID_BC TYPE STRING,
PATNR TYPE STRING,
PATNAME TYPE STRING,
NNAME TYPE STRING,
VNAME TYPE STRING,
GSCHLE TYPE STRING,
GBDAT TYPE STRING,
ROOM TYPE STRING,
BED TYPE STRING,
ORGPF TYPE STRING,
ORGFA TYPE STRING,
EVTID TYPE STRING,
ETYPE_ICON TYPE STRING,
EVTDESCR TYPE STRING,
STATUS TYPE STRING,
PBDAD TYPE STRING,
PBTAD TYPE STRING,
PDRUGDQ TYPE STRING,
DRUGU TYPE STRING,
APROUID TYPE STRING,
PDRUGDQ_ORD TYPE STRING,
DRUGU_ORD TYPE STRING,
CUR_ADRATE TYPE STRING,
CUR_ADRATEU TYPE STRING,
NEXT_ADRATE TYPE STRING,
NEXT_ADRATEU TYPE STRING,
EPREPDOC TYPE STRING,
VERIFICAT TYPE STRING,
GENNAME TYPE STRING,
BRANDNAME TYPE STRING,
CELLSTYLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1ME_EVT_SELECTION_GRID_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_RN1ME_EVT_SELECTION_GRID_STR-ROW_ID sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-R_BC_PATEVT sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-PATNR_BC sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-EVTID_BC sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-PATNR sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-PATNAME sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-NNAME sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-VNAME sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-GSCHLE sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-GBDAT sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-ROOM sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-BED sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-ORGPF sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-ORGFA sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-EVTID sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-ETYPE_ICON sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-EVTDESCR sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-STATUS sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-PBDAD sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-PBTAD sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-PDRUGDQ sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-DRUGU sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-APROUID sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-PDRUGDQ_ORD sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-DRUGU_ORD sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-CUR_ADRATE sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-CUR_ADRATEU sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-NEXT_ADRATE sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-NEXT_ADRATEU sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-EPREPDOC sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-VERIFICAT sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-GENNAME sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-BRANDNAME sy-vline 
WA_RN1ME_EVT_SELECTION_GRID_STR-CELLSTYLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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