ABAP Select data from SAP table RN1APPOINTMENT_LIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1APPOINTMENT_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 RN1APPOINTMENT_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 RN1APPOINTMENT_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_RN1APPOINTMENT_LIST TYPE STANDARD TABLE OF RN1APPOINTMENT_LIST,
      WA_RN1APPOINTMENT_LIST TYPE RN1APPOINTMENT_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: <RN1APPOINTMENT_LIST> TYPE RN1APPOINTMENT_LIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1APPOINTMENT_LIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1APPOINTMENT_LIST
  INTO TABLE IT_RN1APPOINTMENT_LIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1APPOINTMENT_LIST
*  INTO TABLE @DATA(IT_RN1APPOINTMENT_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_RN1APPOINTMENT_LIST INDEX 1 INTO DATA(WA_RN1APPOINTMENT_LIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1APPOINTMENT_LIST ASSIGNING <RN1APPOINTMENT_LIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1APPOINTMENT_LIST>-BUTTON = 1.
<RN1APPOINTMENT_LIST>-TMNID = 1.
<RN1APPOINTMENT_LIST>-LFDNR = 1.
<RN1APPOINTMENT_LIST>-APP_OBJ = 1.
<RN1APPOINTMENT_LIST>-ATSNO = 1.

ENDLOOP.

LOOP AT IT_RN1APPOINTMENT_LIST INTO WA_RN1APPOINTMENT_LIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1APPOINTMENT_LIST-TMNDT, sy-vline,
  WA_RN1APPOINTMENT_LIST-EX_DATE, sy-vline,
  WA_RN1APPOINTMENT_LIST-TMNZT, sy-vline,
  WA_RN1APPOINTMENT_LIST-TMNDR, sy-vline,
  WA_RN1APPOINTMENT_LIST-TMNOE, sy-vline,
  WA_RN1APPOINTMENT_LIST-TMNOE_KB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1APPOINTMENT_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_RN1APPOINTMENT_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_RN1APPOINTMENT_LIST INTO WA_RN1APPOINTMENT_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 ALPHA, internal->external for field TMNID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPOINTMENT_LIST-TMNID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPOINTMENT_LIST-TMNID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TMNOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPOINTMENT_LIST-TMNOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPOINTMENT_LIST-TMNOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPOINTMENT_LIST-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPOINTMENT_LIST-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPOINTMENT_LIST-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPOINTMENT_LIST-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BAUID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPOINTMENT_LIST-BAUID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPOINTMENT_LIST-BAUID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PERNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPOINTMENT_LIST-PERNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPOINTMENT_LIST-PERNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FACHR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPOINTMENT_LIST-FACHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPOINTMENT_LIST-FACHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TRAPPRO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPOINTMENT_LIST-TRAPPRO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPOINTMENT_LIST-TRAPPRO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ATTPERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1APPOINTMENT_LIST-ATTPERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1APPOINTMENT_LIST-ATTPERS.
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_RN1APPOINTMENT_LIST_STR, 
BUTTON TYPE STRING,
TMNID TYPE STRING,
LFDNR TYPE STRING,
APP_OBJ TYPE STRING,
ATSNO TYPE STRING,
TMNDT TYPE STRING,
EX_DATE TYPE STRING,
TMNZT TYPE STRING,
TMNDR TYPE STRING,
TMNOE TYPE STRING,
TMNOE_KB TYPE STRING,
DSPTY TYPE STRING,
DSPTY_TEXT TYPE STRING,
SRVP_LIST TYPE STRING,
GPART TYPE STRING,
GPART_NAME TYPE STRING,
PATKZ TYPE STRING,
ACCTY TYPE STRING,
ACCTYT TYPE STRING,
PRIOCL TYPE STRING,
PRIOCLT TYPE STRING,
RESSOURCE TYPE STRING,
RESSOURCE_KB TYPE STRING,
MEDTX TYPE STRING,
KZTXT TYPE STRING,
TPART TYPE STRING,
TPATXT TYPE STRING,
BWPRIO TYPE STRING,
APRIE TYPE STRING,
APRITXT TYPE STRING,
BWART TYPE STRING,
GPLVN TYPE STRING,
FALNR TYPE STRING,
BAUID TYPE STRING,
PERNR TYPE STRING,
ATSALT TYPE STRING,
DISTMIN TYPE STRING,
DISTMAX TYPE STRING,
DISTUNIT TYPE STRING,
DISTUNIT_EX TYPE STRING,
CYCLE TYPE STRING,
CYCLEUNIT TYPE STRING,
CYCLEUNIT_EX TYPE STRING,
FACHR TYPE STRING,
VISTY TYPE STRING,
PATAPP TYPE STRING,
SERVICES TYPE STRING,
TRAPPRO TYPE STRING,
TRAPPROSN TYPE STRING,
ATTPERS TYPE STRING,
ATTPERSN TYPE STRING,
DRDN_HNDL TYPE STRING,
STYLE TYPE STRING,
CHARFLD TYPE STRING,
INTFLD TYPE STRING,
NUMCFLD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1APPOINTMENT_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_RN1APPOINTMENT_LIST_STR-BUTTON sy-vline 
WA_RN1APPOINTMENT_LIST_STR-TMNID sy-vline 
WA_RN1APPOINTMENT_LIST_STR-LFDNR sy-vline 
WA_RN1APPOINTMENT_LIST_STR-APP_OBJ sy-vline 
WA_RN1APPOINTMENT_LIST_STR-ATSNO sy-vline 
WA_RN1APPOINTMENT_LIST_STR-TMNDT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-EX_DATE sy-vline 
WA_RN1APPOINTMENT_LIST_STR-TMNZT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-TMNDR sy-vline 
WA_RN1APPOINTMENT_LIST_STR-TMNOE sy-vline 
WA_RN1APPOINTMENT_LIST_STR-TMNOE_KB sy-vline 
WA_RN1APPOINTMENT_LIST_STR-DSPTY sy-vline 
WA_RN1APPOINTMENT_LIST_STR-DSPTY_TEXT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-SRVP_LIST sy-vline 
WA_RN1APPOINTMENT_LIST_STR-GPART sy-vline 
WA_RN1APPOINTMENT_LIST_STR-GPART_NAME sy-vline 
WA_RN1APPOINTMENT_LIST_STR-PATKZ sy-vline 
WA_RN1APPOINTMENT_LIST_STR-ACCTY sy-vline 
WA_RN1APPOINTMENT_LIST_STR-ACCTYT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-PRIOCL sy-vline 
WA_RN1APPOINTMENT_LIST_STR-PRIOCLT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-RESSOURCE sy-vline 
WA_RN1APPOINTMENT_LIST_STR-RESSOURCE_KB sy-vline 
WA_RN1APPOINTMENT_LIST_STR-MEDTX sy-vline 
WA_RN1APPOINTMENT_LIST_STR-KZTXT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-TPART sy-vline 
WA_RN1APPOINTMENT_LIST_STR-TPATXT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-BWPRIO sy-vline 
WA_RN1APPOINTMENT_LIST_STR-APRIE sy-vline 
WA_RN1APPOINTMENT_LIST_STR-APRITXT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-BWART sy-vline 
WA_RN1APPOINTMENT_LIST_STR-GPLVN sy-vline 
WA_RN1APPOINTMENT_LIST_STR-FALNR sy-vline 
WA_RN1APPOINTMENT_LIST_STR-BAUID sy-vline 
WA_RN1APPOINTMENT_LIST_STR-PERNR sy-vline 
WA_RN1APPOINTMENT_LIST_STR-ATSALT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-DISTMIN sy-vline 
WA_RN1APPOINTMENT_LIST_STR-DISTMAX sy-vline 
WA_RN1APPOINTMENT_LIST_STR-DISTUNIT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-DISTUNIT_EX sy-vline 
WA_RN1APPOINTMENT_LIST_STR-CYCLE sy-vline 
WA_RN1APPOINTMENT_LIST_STR-CYCLEUNIT sy-vline 
WA_RN1APPOINTMENT_LIST_STR-CYCLEUNIT_EX sy-vline 
WA_RN1APPOINTMENT_LIST_STR-FACHR sy-vline 
WA_RN1APPOINTMENT_LIST_STR-VISTY sy-vline 
WA_RN1APPOINTMENT_LIST_STR-PATAPP sy-vline 
WA_RN1APPOINTMENT_LIST_STR-SERVICES sy-vline 
WA_RN1APPOINTMENT_LIST_STR-TRAPPRO sy-vline 
WA_RN1APPOINTMENT_LIST_STR-TRAPPROSN sy-vline 
WA_RN1APPOINTMENT_LIST_STR-ATTPERS sy-vline 
WA_RN1APPOINTMENT_LIST_STR-ATTPERSN sy-vline 
WA_RN1APPOINTMENT_LIST_STR-DRDN_HNDL sy-vline 
WA_RN1APPOINTMENT_LIST_STR-STYLE sy-vline 
WA_RN1APPOINTMENT_LIST_STR-CHARFLD sy-vline 
WA_RN1APPOINTMENT_LIST_STR-INTFLD sy-vline 
WA_RN1APPOINTMENT_LIST_STR-NUMCFLD sy-vline      INTO ld_text SEPARATED BY SPACE.

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