ABAP Select data from SAP table RN2CLIO_PAT_OVERVIEW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN2CLIO_PAT_OVERVIEW 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 RN2CLIO_PAT_OVERVIEW. 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 RN2CLIO_PAT_OVERVIEW 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_RN2CLIO_PAT_OVERVIEW TYPE STANDARD TABLE OF RN2CLIO_PAT_OVERVIEW,
      WA_RN2CLIO_PAT_OVERVIEW TYPE RN2CLIO_PAT_OVERVIEW,
      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: <RN2CLIO_PAT_OVERVIEW> TYPE RN2CLIO_PAT_OVERVIEW.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN2CLIO_PAT_OVERVIEW.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN2CLIO_PAT_OVERVIEW
  INTO TABLE IT_RN2CLIO_PAT_OVERVIEW.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN2CLIO_PAT_OVERVIEW
*  INTO TABLE @DATA(IT_RN2CLIO_PAT_OVERVIEW2).
*--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_RN2CLIO_PAT_OVERVIEW INDEX 1 INTO DATA(WA_RN2CLIO_PAT_OVERVIEW2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN2CLIO_PAT_OVERVIEW ASSIGNING <RN2CLIO_PAT_OVERVIEW>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN2CLIO_PAT_OVERVIEW>-PATNR = 1.
<RN2CLIO_PAT_OVERVIEW>-NAME = 1.
<RN2CLIO_PAT_OVERVIEW>-GSCHL = 1.
<RN2CLIO_PAT_OVERVIEW>-GSCHLE = 1.
<RN2CLIO_PAT_OVERVIEW>-AGE = 1.

ENDLOOP.

LOOP AT IT_RN2CLIO_PAT_OVERVIEW INTO WA_RN2CLIO_PAT_OVERVIEW.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN2CLIO_PAT_OVERVIEW-GBDAT, sy-vline,
  WA_RN2CLIO_PAT_OVERVIEW-TODKZ, sy-vline,
  WA_RN2CLIO_PAT_OVERVIEW-NATIO, sy-vline,
  WA_RN2CLIO_PAT_OVERVIEW-NATIO_TEXT, sy-vline,
  WA_RN2CLIO_PAT_OVERVIEW-SPEND, sy-vline,
  WA_RN2CLIO_PAT_OVERVIEW-SPENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN2CLIO_PAT_OVERVIEW 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_RN2CLIO_PAT_OVERVIEW 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_RN2CLIO_PAT_OVERVIEW INTO WA_RN2CLIO_PAT_OVERVIEW.


*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 PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_PAT_OVERVIEW-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_PAT_OVERVIEW-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AGNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_PAT_OVERVIEW-AGNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_PAT_OVERVIEW-AGNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field EMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_PAT_OVERVIEW-EMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_PAT_OVERVIEW-EMAIL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INSTITUTION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_PAT_OVERVIEW-INSTITUTION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_PAT_OVERVIEW-INSTITUTION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CASE_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_PAT_OVERVIEW-CASE_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_PAT_OVERVIEW-CASE_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_RN2CLIO_PAT_OVERVIEW-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN2CLIO_PAT_OVERVIEW-LANGUAGE.
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_RN2CLIO_PAT_OVERVIEW_STR, 
PATNR TYPE STRING,
NAME TYPE STRING,
GSCHL TYPE STRING,
GSCHLE TYPE STRING,
AGE TYPE STRING,
GBDAT TYPE STRING,
TODKZ TYPE STRING,
NATIO TYPE STRING,
NATIO_TEXT TYPE STRING,
SPEND TYPE STRING,
SPENT TYPE STRING,
BERUF TYPE STRING,
AGNUM TYPE STRING,
AGNAM TYPE STRING,
KZTXT TYPE STRING,
RISKF TYPE STRING,
STRAS TYPE STRING,
ORT TYPE STRING,
PSTLZ TYPE STRING,
LAND TYPE STRING,
TELNR TYPE STRING,
TELXT TYPE STRING,
EMAIL TYPE STRING,
TRANSF_DOC TYPE STRING,
HOUSE_DOC TYPE STRING,
INSTITUTION TYPE STRING,
CASE_ID TYPE STRING,
ADMISSION_DATE TYPE STRING,
ATTENDING_PHYSICIAN TYPE STRING,
GSCHL_TXT TYPE STRING,
PAT_NAME_SEX_AGE TYPE STRING,
HEADLINE TYPE STRING,
KONFE TYPE STRING,
KONFE_TXT TYPE STRING,
LANGUAGE TYPE STRING,
LANGUAGE_TXT TYPE STRING,
FOTO_LOCATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN2CLIO_PAT_OVERVIEW_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_RN2CLIO_PAT_OVERVIEW_STR-PATNR sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-NAME sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-GSCHL sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-GSCHLE sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-AGE sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-GBDAT sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-TODKZ sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-NATIO sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-NATIO_TEXT sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-SPEND sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-SPENT sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-BERUF sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-AGNUM sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-AGNAM sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-KZTXT sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-RISKF sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-STRAS sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-ORT sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-PSTLZ sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-LAND sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-TELNR sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-TELXT sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-EMAIL sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-TRANSF_DOC sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-HOUSE_DOC sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-INSTITUTION sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-CASE_ID sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-ADMISSION_DATE sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-ATTENDING_PHYSICIAN sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-GSCHL_TXT sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-PAT_NAME_SEX_AGE sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-HEADLINE sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-KONFE sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-KONFE_TXT sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-LANGUAGE sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-LANGUAGE_TXT sy-vline 
WA_RN2CLIO_PAT_OVERVIEW_STR-FOTO_LOCATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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