ABAP Select data from SAP table RNE1PLUS_CASES_DISPLAY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNE1PLUS_CASES_DISPLAY 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 RNE1PLUS_CASES_DISPLAY. 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 RNE1PLUS_CASES_DISPLAY 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_RNE1PLUS_CASES_DISPLAY TYPE STANDARD TABLE OF RNE1PLUS_CASES_DISPLAY,
      WA_RNE1PLUS_CASES_DISPLAY TYPE RNE1PLUS_CASES_DISPLAY,
      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: <RNE1PLUS_CASES_DISPLAY> TYPE RNE1PLUS_CASES_DISPLAY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RNE1PLUS_CASES_DISPLAY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RNE1PLUS_CASES_DISPLAY
  INTO TABLE IT_RNE1PLUS_CASES_DISPLAY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNE1PLUS_CASES_DISPLAY
*  INTO TABLE @DATA(IT_RNE1PLUS_CASES_DISPLAY2).
*--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_RNE1PLUS_CASES_DISPLAY INDEX 1 INTO DATA(WA_RNE1PLUS_CASES_DISPLAY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNE1PLUS_CASES_DISPLAY ASSIGNING <RNE1PLUS_CASES_DISPLAY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNE1PLUS_CASES_DISPLAY>-FALNR = 1.
<RNE1PLUS_CASES_DISPLAY>-AUSWERTUNGSART = 1.
<RNE1PLUS_CASES_DISPLAY>-PNAME = 1.
<RNE1PLUS_CASES_DISPLAY>-PZIFF_FALL = 1.
<RNE1PLUS_CASES_DISPLAY>-DRG_MIT_VERSART = 1.

ENDLOOP.

LOOP AT IT_RNE1PLUS_CASES_DISPLAY INTO WA_RNE1PLUS_CASES_DISPLAY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNE1PLUS_CASES_DISPLAY-DRG_CODE, sy-vline,
  WA_RNE1PLUS_CASES_DISPLAY-VERSORGUNGSART, sy-vline,
  WA_RNE1PLUS_CASES_DISPLAY-GES_FAELLE, sy-vline,
  WA_RNE1PLUS_CASES_DISPLAY-GES_BWREL_KAT, sy-vline,
  WA_RNE1PLUS_CASES_DISPLAY-GES_BWREL_EFF, sy-vline,
  WA_RNE1PLUS_CASES_DISPLAY-NORM_FAELLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNE1PLUS_CASES_DISPLAY 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_RNE1PLUS_CASES_DISPLAY 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_RNE1PLUS_CASES_DISPLAY INTO WA_RNE1PLUS_CASES_DISPLAY.


*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 FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNE1PLUS_CASES_DISPLAY-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNE1PLUS_CASES_DISPLAY-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DRG_CODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNE1PLUS_CASES_DISPLAY-DRG_CODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNE1PLUS_CASES_DISPLAY-DRG_CODE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BILLMODE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNE1PLUS_CASES_DISPLAY-BILLMODE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNE1PLUS_CASES_DISPLAY-BILLMODE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DRG_CAT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNE1PLUS_CASES_DISPLAY-DRG_CAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNE1PLUS_CASES_DISPLAY-DRG_CAT.
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_RNE1PLUS_CASES_DISPLAY_STR, 
FALNR TYPE STRING,
AUSWERTUNGSART TYPE STRING,
PNAME TYPE STRING,
PZIFF_FALL TYPE STRING,
DRG_MIT_VERSART TYPE STRING,
DRG_CODE TYPE STRING,
VERSORGUNGSART TYPE STRING,
GES_FAELLE TYPE STRING,
GES_BWREL_KAT TYPE STRING,
GES_BWREL_EFF TYPE STRING,
NORM_FAELLE TYPE STRING,
NORM_TAGE TYPE STRING,
NORM_BWREL TYPE STRING,
NORM_RELGEW TYPE STRING,
KURZ_FAELLE TYPE STRING,
KURZ_TAGE TYPE STRING,
KURZ_BWREL TYPE STRING,
KURZ_RELGEW TYPE STRING,
AUFV_FAELLE TYPE STRING,
AUFV_TAGE TYPE STRING,
AUFV_BWREL TYPE STRING,
AUFV_RELGEW TYPE STRING,
ENTV_FAELLE TYPE STRING,
ENTV_TAGE TYPE STRING,
ENTV_BWREL TYPE STRING,
ENTV_RELGEW TYPE STRING,
LANG_FAELLE TYPE STRING,
LANG_TAGE TYPE STRING,
LANG_BWREL TYPE STRING,
LANG_RELGEW TYPE STRING,
DRG_TEXT TYPE STRING,
ALV_EXPAND TYPE STRING,
VERL_FAELLE TYPE STRING,
VERL_TAGE TYPE STRING,
VERL_BWREL TYPE STRING,
VERL_RELGEW TYPE STRING,
LOS TYPE STRING,
LOS_H TYPE STRING,
LOS_AVG TYPE STRING,
MDC TYPE STRING,
MDC_CAT TYPE STRING,
MIN_LOS TYPE STRING,
AVG_LOS TYPE STRING,
MAX_LOS TYPE STRING,
BILLMODE TYPE STRING,
DRG_CAT TYPE STRING,
AVG_LOS_DEC TYPE STRING,
LOS_BILL TYPE STRING,
TOB TYPE STRING,
PEPP_ANZ_FAELLE TYPE STRING,
PEPP_BWREL_EFF TYPE STRING,
PEPP1_FAELLE TYPE STRING,
PEPP1_TAGE TYPE STRING,
PEPP1_BWREL TYPE STRING,
PEPP1_RELGEW TYPE STRING,
PEPP2_FAELLE TYPE STRING,
PEPP2_TAGE TYPE STRING,
PEPP2_BWREL TYPE STRING,
PEPP2_RELGEW TYPE STRING,
PEPP3_FAELLE TYPE STRING,
PEPP3_TAGE TYPE STRING,
PEPP3_BWREL TYPE STRING,
PEPP3_RELGEW TYPE STRING,
PEPP4_FAELLE TYPE STRING,
PEPP4_TAGE TYPE STRING,
PEPP4_BWREL TYPE STRING,
PEPP4_RELGEW TYPE STRING,
PEPP5_FAELLE TYPE STRING,
PEPP5_TAGE TYPE STRING,
PEPP5_BWREL TYPE STRING,
PEPP5_RELGEW TYPE STRING,
FALAR TYPE STRING,
PEPP_FALL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNE1PLUS_CASES_DISPLAY_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_RNE1PLUS_CASES_DISPLAY_STR-FALNR sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-AUSWERTUNGSART sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PNAME sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PZIFF_FALL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-DRG_MIT_VERSART sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-DRG_CODE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-VERSORGUNGSART sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-GES_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-GES_BWREL_KAT sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-GES_BWREL_EFF sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-NORM_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-NORM_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-NORM_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-NORM_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-KURZ_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-KURZ_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-KURZ_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-KURZ_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-AUFV_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-AUFV_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-AUFV_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-AUFV_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-ENTV_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-ENTV_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-ENTV_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-ENTV_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-LANG_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-LANG_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-LANG_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-LANG_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-DRG_TEXT sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-ALV_EXPAND sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-VERL_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-VERL_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-VERL_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-VERL_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-LOS sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-LOS_H sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-LOS_AVG sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-MDC sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-MDC_CAT sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-MIN_LOS sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-AVG_LOS sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-MAX_LOS sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-BILLMODE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-DRG_CAT sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-AVG_LOS_DEC sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-LOS_BILL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-TOB sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP_ANZ_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP_BWREL_EFF sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP1_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP1_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP1_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP1_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP2_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP2_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP2_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP2_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP3_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP3_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP3_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP3_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP4_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP4_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP4_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP4_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP5_FAELLE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP5_TAGE sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP5_BWREL sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP5_RELGEW sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-FALAR sy-vline 
WA_RNE1PLUS_CASES_DISPLAY_STR-PEPP_FALL sy-vline      INTO ld_text SEPARATED BY SPACE.

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