ABAP Select data from SAP table RN1_GRID_ME_EVENT_LIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1_GRID_ME_EVENT_LIST 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 RN1_GRID_ME_EVENT_LIST. 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 RN1_GRID_ME_EVENT_LIST 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_RN1_GRID_ME_EVENT_LIST TYPE STANDARD TABLE OF RN1_GRID_ME_EVENT_LIST,
      WA_RN1_GRID_ME_EVENT_LIST TYPE RN1_GRID_ME_EVENT_LIST,
      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: <RN1_GRID_ME_EVENT_LIST> TYPE RN1_GRID_ME_EVENT_LIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1_GRID_ME_EVENT_LIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1_GRID_ME_EVENT_LIST
  INTO TABLE IT_RN1_GRID_ME_EVENT_LIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1_GRID_ME_EVENT_LIST
*  INTO TABLE @DATA(IT_RN1_GRID_ME_EVENT_LIST2).
*--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_RN1_GRID_ME_EVENT_LIST INDEX 1 INTO DATA(WA_RN1_GRID_ME_EVENT_LIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1_GRID_ME_EVENT_LIST ASSIGNING <RN1_GRID_ME_EVENT_LIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1_GRID_ME_EVENT_LIST>-ROW_ID = 1.
<RN1_GRID_ME_EVENT_LIST>-PNAMEC1 = 1.
<RN1_GRID_ME_EVENT_LIST>-MEORDID = 1.
<RN1_GRID_ME_EVENT_LIST>-DRUGNAME = 1.
<RN1_GRID_ME_EVENT_LIST>-BRANDNAME = 1.

ENDLOOP.

LOOP AT IT_RN1_GRID_ME_EVENT_LIST INTO WA_RN1_GRID_ME_EVENT_LIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1_GRID_ME_EVENT_LIST-FSOURCE, sy-vline,
  WA_RN1_GRID_ME_EVENT_LIST-PBDAD, sy-vline,
  WA_RN1_GRID_ME_EVENT_LIST-PBTAD, sy-vline,
  WA_RN1_GRID_ME_EVENT_LIST-USERST, sy-vline,
  WA_RN1_GRID_ME_EVENT_LIST-PDRUGDQ, sy-vline,
  WA_RN1_GRID_ME_EVENT_LIST-DRUGU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1_GRID_ME_EVENT_LIST 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_RN1_GRID_ME_EVENT_LIST 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_RN1_GRID_ME_EVENT_LIST INTO WA_RN1_GRID_ME_EVENT_LIST.


*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 ME12D, internal->external for field PDRUGDQ
CALL FUNCTION 'CONVERSION_EXIT_ME12D_OUTPUT'
  EXPORTING
    input =                      WA_RN1_GRID_ME_EVENT_LIST-PDRUGDQ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_GRID_ME_EVENT_LIST-PDRUGDQ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MEQUA, internal->external for field PDRUGASTR
CALL FUNCTION 'CONVERSION_EXIT_MEQUA_OUTPUT'
  EXPORTING
    input =                      WA_RN1_GRID_ME_EVENT_LIST-PDRUGASTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_GRID_ME_EVENT_LIST-PDRUGASTR.
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_RN1_GRID_ME_EVENT_LIST_STR, 
ROW_ID TYPE STRING,
PNAMEC1 TYPE STRING,
MEORDID TYPE STRING,
DRUGNAME TYPE STRING,
BRANDNAME TYPE STRING,
FSOURCE TYPE STRING,
PBDAD TYPE STRING,
PBTAD TYPE STRING,
USERST TYPE STRING,
PDRUGDQ TYPE STRING,
DRUGU TYPE STRING,
PDRUGASTR TYPE STRING,
DRUGASTRU TYPE STRING,
DETAIL_BUT TYPE STRING,
STATUS_BUT TYPE STRING,
PENDING_WIT TYPE STRING,
EVENT_REF TYPE STRING,
PRNCSTX TYPE STRING,
MOSTX TYPE STRING,
PRNCLTX_ICON TYPE STRING,
MOLTX_ICON TYPE STRING,
NOTE_PHARM_BUT TYPE STRING,
NOTE_NURSE_BUT TYPE STRING,
NOTE_PHYS_BUT TYPE STRING,
MONOGRAPH_BUT TYPE STRING,
NOTE_GEN_BUT TYPE STRING,
DRUGU_COMP TYPE STRING,
EDESCR TYPE STRING,
DETAIL_ICON TYPE STRING,
MEEVTID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1_GRID_ME_EVENT_LIST_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_RN1_GRID_ME_EVENT_LIST_STR-ROW_ID sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-PNAMEC1 sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-MEORDID sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-DRUGNAME sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-BRANDNAME sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-FSOURCE sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-PBDAD sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-PBTAD sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-USERST sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-PDRUGDQ sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-DRUGU sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-PDRUGASTR sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-DRUGASTRU sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-DETAIL_BUT sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-STATUS_BUT sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-PENDING_WIT sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-EVENT_REF sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-PRNCSTX sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-MOSTX sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-PRNCLTX_ICON sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-MOLTX_ICON sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-NOTE_PHARM_BUT sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-NOTE_NURSE_BUT sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-NOTE_PHYS_BUT sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-MONOGRAPH_BUT sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-NOTE_GEN_BUT sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-DRUGU_COMP sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-EDESCR sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-DETAIL_ICON sy-vline 
WA_RN1_GRID_ME_EVENT_LIST_STR-MEEVTID sy-vline      INTO ld_text SEPARATED BY SPACE.

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