ABAP Select data from SAP table RNBADI_DIAG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNBADI_DIAG
*  INTO TABLE @DATA(IT_RNBADI_DIAG2).
*--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_RNBADI_DIAG INDEX 1 INTO DATA(WA_RNBADI_DIAG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNBADI_DIAG>-DKEY1 = 1.
<RNBADI_DIAG>-DTYP1 = 1.
<RNBADI_DIAG>-DKAT1 = 1.
<RNBADI_DIAG>-DRG_CATEGORY = 1.
<RNBADI_DIAG>-DRG_CC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNBADI_DIAG-DRG_RELVANT, sy-vline,
  WA_RNBADI_DIAG-CCL, sy-vline,
  WA_RNBADI_DIAG-DRG_DIA_SEQNO, sy-vline,
  WA_RNBADI_DIAG-EWDIA, sy-vline,
  WA_RNBADI_DIAG-BHDIA, sy-vline,
  WA_RNBADI_DIAG-AFDIA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNBADI_DIAG 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_RNBADI_DIAG 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_RNBADI_DIAG INTO WA_RNBADI_DIAG.


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

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

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

*Conversion exit ALPHA, internal->external for field DIAZS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNBADI_DIAG-DIAZS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNBADI_DIAG-DIAZS.
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_RNBADI_DIAG_STR, 
DKEY1 TYPE STRING,
DTYP1 TYPE STRING,
DKAT1 TYPE STRING,
DRG_CATEGORY TYPE STRING,
DRG_CC TYPE STRING,
DRG_RELVANT TYPE STRING,
CCL TYPE STRING,
DRG_DIA_SEQNO TYPE STRING,
EWDIA TYPE STRING,
BHDIA TYPE STRING,
AFDIA TYPE STRING,
ENDIA TYPE STRING,
ARDIA TYPE STRING,
PODIA TYPE STRING,
OPDIA TYPE STRING,
TUDIA TYPE STRING,
FHDIA TYPE STRING,
KHDIA TYPE STRING,
DITXT TYPE STRING,
ROW_ID TYPE STRING,
DKEY2 TYPE STRING,
DTYP2 TYPE STRING,
DKAT2 TYPE STRING,
DIAPE TYPE STRING,
DIADT TYPE STRING,
DIAZT TYPE STRING,
ANZOP TYPE STRING,
DIALO TYPE STRING,
DIAGW TYPE STRING,
KZTXT TYPE STRING,
SPERR TYPE STRING,
ALTERN_DIATXT TYPE STRING,
DIAZS TYPE STRING,
DOCVIEW TYPE STRING,
DIAG_EXCF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNBADI_DIAG_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_RNBADI_DIAG_STR-DKEY1 sy-vline 
WA_RNBADI_DIAG_STR-DTYP1 sy-vline 
WA_RNBADI_DIAG_STR-DKAT1 sy-vline 
WA_RNBADI_DIAG_STR-DRG_CATEGORY sy-vline 
WA_RNBADI_DIAG_STR-DRG_CC sy-vline 
WA_RNBADI_DIAG_STR-DRG_RELVANT sy-vline 
WA_RNBADI_DIAG_STR-CCL sy-vline 
WA_RNBADI_DIAG_STR-DRG_DIA_SEQNO sy-vline 
WA_RNBADI_DIAG_STR-EWDIA sy-vline 
WA_RNBADI_DIAG_STR-BHDIA sy-vline 
WA_RNBADI_DIAG_STR-AFDIA sy-vline 
WA_RNBADI_DIAG_STR-ENDIA sy-vline 
WA_RNBADI_DIAG_STR-ARDIA sy-vline 
WA_RNBADI_DIAG_STR-PODIA sy-vline 
WA_RNBADI_DIAG_STR-OPDIA sy-vline 
WA_RNBADI_DIAG_STR-TUDIA sy-vline 
WA_RNBADI_DIAG_STR-FHDIA sy-vline 
WA_RNBADI_DIAG_STR-KHDIA sy-vline 
WA_RNBADI_DIAG_STR-DITXT sy-vline 
WA_RNBADI_DIAG_STR-ROW_ID sy-vline 
WA_RNBADI_DIAG_STR-DKEY2 sy-vline 
WA_RNBADI_DIAG_STR-DTYP2 sy-vline 
WA_RNBADI_DIAG_STR-DKAT2 sy-vline 
WA_RNBADI_DIAG_STR-DIAPE sy-vline 
WA_RNBADI_DIAG_STR-DIADT sy-vline 
WA_RNBADI_DIAG_STR-DIAZT sy-vline 
WA_RNBADI_DIAG_STR-ANZOP sy-vline 
WA_RNBADI_DIAG_STR-DIALO sy-vline 
WA_RNBADI_DIAG_STR-DIAGW sy-vline 
WA_RNBADI_DIAG_STR-KZTXT sy-vline 
WA_RNBADI_DIAG_STR-SPERR sy-vline 
WA_RNBADI_DIAG_STR-ALTERN_DIATXT sy-vline 
WA_RNBADI_DIAG_STR-DIAZS sy-vline 
WA_RNBADI_DIAG_STR-DOCVIEW sy-vline 
WA_RNBADI_DIAG_STR-DIAG_EXCF sy-vline      INTO ld_text SEPARATED BY SPACE.

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