ABAP Select data from SAP table RN1_CHART_N1MEEVENT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1_CHART_N1MEEVENT 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_CHART_N1MEEVENT. 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_CHART_N1MEEVENT 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_CHART_N1MEEVENT TYPE STANDARD TABLE OF RN1_CHART_N1MEEVENT,
      WA_RN1_CHART_N1MEEVENT TYPE RN1_CHART_N1MEEVENT,
      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_CHART_N1MEEVENT> TYPE RN1_CHART_N1MEEVENT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1_CHART_N1MEEVENT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1_CHART_N1MEEVENT
  INTO TABLE IT_RN1_CHART_N1MEEVENT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1_CHART_N1MEEVENT
*  INTO TABLE @DATA(IT_RN1_CHART_N1MEEVENT2).
*--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_CHART_N1MEEVENT INDEX 1 INTO DATA(WA_RN1_CHART_N1MEEVENT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1_CHART_N1MEEVENT ASSIGNING <RN1_CHART_N1MEEVENT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1_CHART_N1MEEVENT>-MEORDID = 1.
<RN1_CHART_N1MEEVENT>-MEEVTID = 1.
<RN1_CHART_N1MEEVENT>-MESEQNO = 1.
<RN1_CHART_N1MEEVENT>-DRUGID = 1.
<RN1_CHART_N1MEEVENT>-DRUGNAME = 1.

ENDLOOP.

LOOP AT IT_RN1_CHART_N1MEEVENT INTO WA_RN1_CHART_N1MEEVENT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1_CHART_N1MEEVENT-PBDAD, sy-vline,
  WA_RN1_CHART_N1MEEVENT-PBTAD, sy-vline,
  WA_RN1_CHART_N1MEEVENT-RBDAD, sy-vline,
  WA_RN1_CHART_N1MEEVENT-RBTAD, sy-vline,
  WA_RN1_CHART_N1MEEVENT-PEDAD, sy-vline,
  WA_RN1_CHART_N1MEEVENT-PETAD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1_CHART_N1MEEVENT 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_CHART_N1MEEVENT 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_CHART_N1MEEVENT INTO WA_RN1_CHART_N1MEEVENT.


*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 ADRATE
CALL FUNCTION 'CONVERSION_EXIT_ME12D_OUTPUT'
  EXPORTING
    input =                      WA_RN1_CHART_N1MEEVENT-ADRATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_CHART_N1MEEVENT-ADRATE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ADRATEOU
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RN1_CHART_N1MEEVENT-ADRATEOU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1_CHART_N1MEEVENT-ADRATEOU.
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_CHART_N1MEEVENT_STR, 
MEORDID TYPE STRING,
MEEVTID TYPE STRING,
MESEQNO TYPE STRING,
DRUGID TYPE STRING,
DRUGNAME TYPE STRING,
PBDAD TYPE STRING,
PBTAD TYPE STRING,
RBDAD TYPE STRING,
RBTAD TYPE STRING,
PEDAD TYPE STRING,
PETAD TYPE STRING,
REDAD TYPE STRING,
RETAD TYPE STRING,
PDRUGDQ TYPE STRING,
RDRUGDQ TYPE STRING,
DRUGU TYPE STRING,
PRN TYPE STRING,
MASTEV TYPE STRING,
STATUS TYPE STRING,
INTST TYPE STRING,
MESID TYPE STRING,
USERST TYPE STRING,
DESCR TYPE STRING,
ETYPE TYPE STRING,
TOOLTIPHEAD TYPE STRING,
TOOLTIP TYPE STRING,
T_DEV_EVENTS TYPE STRING,
ABS_RATE TYPE STRING,
MASTEVTXT TYPE STRING,
ADRATE TYPE STRING,
ADRATEOU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1_CHART_N1MEEVENT_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_CHART_N1MEEVENT_STR-MEORDID sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-MEEVTID sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-MESEQNO sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-DRUGID sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-DRUGNAME sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-PBDAD sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-PBTAD sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-RBDAD sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-RBTAD sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-PEDAD sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-PETAD sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-REDAD sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-RETAD sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-PDRUGDQ sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-RDRUGDQ sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-DRUGU sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-PRN sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-MASTEV sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-STATUS sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-INTST sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-MESID sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-USERST sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-DESCR sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-ETYPE sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-TOOLTIPHEAD sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-TOOLTIP sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-T_DEV_EVENTS sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-ABS_RATE sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-MASTEVTXT sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-ADRATE sy-vline 
WA_RN1_CHART_N1MEEVENT_STR-ADRATEOU sy-vline      INTO ld_text SEPARATED BY SPACE.

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