ABAP Select data from SAP table RN1ADMISSION_PREALLOC 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 RN1ADMISSION_PREALLOC 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 RN1ADMISSION_PREALLOC. 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 RN1ADMISSION_PREALLOC 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_RN1ADMISSION_PREALLOC TYPE STANDARD TABLE OF RN1ADMISSION_PREALLOC,
      WA_RN1ADMISSION_PREALLOC TYPE RN1ADMISSION_PREALLOC,
      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: <RN1ADMISSION_PREALLOC> TYPE RN1ADMISSION_PREALLOC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1ADMISSION_PREALLOC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1ADMISSION_PREALLOC
  INTO TABLE IT_RN1ADMISSION_PREALLOC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1ADMISSION_PREALLOC
*  INTO TABLE @DATA(IT_RN1ADMISSION_PREALLOC2).
*--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_RN1ADMISSION_PREALLOC INDEX 1 INTO DATA(WA_RN1ADMISSION_PREALLOC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1ADMISSION_PREALLOC ASSIGNING <RN1ADMISSION_PREALLOC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1ADMISSION_PREALLOC>-FCODE = 1.
<RN1ADMISSION_PREALLOC>-EINRI = 1.
<RN1ADMISSION_PREALLOC>-ORGFA = 1.
<RN1ADMISSION_PREALLOC>-ORGPF = 1.
<RN1ADMISSION_PREALLOC>-BWIDT = 1.

ENDLOOP.

LOOP AT IT_RN1ADMISSION_PREALLOC INTO WA_RN1ADMISSION_PREALLOC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1ADMISSION_PREALLOC-BWIZT, sy-vline,
  WA_RN1ADMISSION_PREALLOC-BWART, sy-vline,
  WA_RN1ADMISSION_PREALLOC-STATU, sy-vline,
  WA_RN1ADMISSION_PREALLOC-POBNR, sy-vline,
  WA_RN1ADMISSION_PREALLOC-BARZT, sy-vline,
  WA_RN1ADMISSION_PREALLOC-ZIMMR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1ADMISSION_PREALLOC 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_RN1ADMISSION_PREALLOC 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_RN1ADMISSION_PREALLOC INTO WA_RN1ADMISSION_PREALLOC.


*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 FCODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-FCODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-FCODE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-ORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-ORGFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-ORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-ORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BARZT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-BARZT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-BARZT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZIMMR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-ZIMMR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-ZIMMR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BEKAT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-BEKAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-BEKAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CLASS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-CLASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-CLASS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FACHR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-FACHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-FACHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LNRAPP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-LNRAPP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-LNRAPP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PELOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-PELOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-PELOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EINBOE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-EINBOE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-EINBOE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EINBPER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-EINBPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-EINBPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EINBZIM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-EINBZIM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-EINBZIM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field UARNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-UARNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-UARNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field EMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_RN1ADMISSION_PREALLOC-EMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1ADMISSION_PREALLOC-EMAIL.
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_RN1ADMISSION_PREALLOC_STR, 
FCODE TYPE STRING,
EINRI TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
BWIDT TYPE STRING,
BWIZT TYPE STRING,
BWART TYPE STRING,
STATU TYPE STRING,
POBNR TYPE STRING,
BARZT TYPE STRING,
ZIMMR TYPE STRING,
DSPTY TYPE STRING,
VISTY TYPE STRING,
BEKAT TYPE STRING,
CLASS TYPE STRING,
FILL TYPE STRING,
KZTXT TYPE STRING,
FACHR TYPE STRING,
STOID TYPE STRING,
LNRAPP TYPE STRING,
PATNR TYPE STRING,
DAUER TYPE STRING,
PELOC TYPE STRING,
BNKZ TYPE STRING,
BNDT TYPE STRING,
BNART TYPE STRING,
EINBDT TYPE STRING,
EINBZT TYPE STRING,
EINBOE TYPE STRING,
EINBPER TYPE STRING,
EINBZIM TYPE STRING,
BWGR1 TYPE STRING,
BWGR2 TYPE STRING,
UARNR TYPE STRING,
ISHMED TYPE STRING,
TELF1 TYPE STRING,
EMAIL TYPE STRING,
FATYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1ADMISSION_PREALLOC_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_RN1ADMISSION_PREALLOC_STR-FCODE sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-EINRI sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-ORGFA sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-ORGPF sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-BWIDT sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-BWIZT sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-BWART sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-STATU sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-POBNR sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-BARZT sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-ZIMMR sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-DSPTY sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-VISTY sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-BEKAT sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-CLASS sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-FILL sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-KZTXT sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-FACHR sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-STOID sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-LNRAPP sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-PATNR sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-DAUER sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-PELOC sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-BNKZ sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-BNDT sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-BNART sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-EINBDT sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-EINBZT sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-EINBOE sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-EINBPER sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-EINBZIM sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-BWGR1 sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-BWGR2 sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-UARNR sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-ISHMED sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-TELF1 sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-EMAIL sy-vline 
WA_RN1ADMISSION_PREALLOC_STR-FATYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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