ABAP Select data from SAP table RN1PAL_PATIENT_AD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1PAL_PATIENT_AD 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 RN1PAL_PATIENT_AD. 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 RN1PAL_PATIENT_AD 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_RN1PAL_PATIENT_AD TYPE STANDARD TABLE OF RN1PAL_PATIENT_AD,
      WA_RN1PAL_PATIENT_AD TYPE RN1PAL_PATIENT_AD,
      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: <RN1PAL_PATIENT_AD> TYPE RN1PAL_PATIENT_AD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1PAL_PATIENT_AD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1PAL_PATIENT_AD
  INTO TABLE IT_RN1PAL_PATIENT_AD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1PAL_PATIENT_AD
*  INTO TABLE @DATA(IT_RN1PAL_PATIENT_AD2).
*--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_RN1PAL_PATIENT_AD INDEX 1 INTO DATA(WA_RN1PAL_PATIENT_AD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1PAL_PATIENT_AD ASSIGNING <RN1PAL_PATIENT_AD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1PAL_PATIENT_AD>-PATIENT_ID = 1.
<RN1PAL_PATIENT_AD>-PATIENT_ID_STRING = 1.
<RN1PAL_PATIENT_AD>-ALLERGIES_COUNT = 1.
<RN1PAL_PATIENT_AD>-ALLERGIES_STATE_TOTAL = 1.
<RN1PAL_PATIENT_AD>-STATE_ICON_WDA = 1.

ENDLOOP.

LOOP AT IT_RN1PAL_PATIENT_AD INTO WA_RN1PAL_PATIENT_AD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1PAL_PATIENT_AD-STATE_ICON_SAP, sy-vline,
  WA_RN1PAL_PATIENT_AD-STATE_ICON_SUI, sy-vline,
  WA_RN1PAL_PATIENT_AD-STATE_TEXT, sy-vline,
  WA_RN1PAL_PATIENT_AD-STATE_ICON_TEXT, sy-vline,
  WA_RN1PAL_PATIENT_AD-STATE_NOA_TEXT, sy-vline,
  WA_RN1PAL_PATIENT_AD-ALLERGIES_ALL_TEXTE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1PAL_PATIENT_AD 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_RN1PAL_PATIENT_AD 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_RN1PAL_PATIENT_AD INTO WA_RN1PAL_PATIENT_AD.


*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 PATIENT_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PAL_PATIENT_AD-PATIENT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PAL_PATIENT_AD-PATIENT_ID.
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_RN1PAL_PATIENT_AD_STR, 
PATIENT_ID TYPE STRING,
PATIENT_ID_STRING TYPE STRING,
ALLERGIES_COUNT TYPE STRING,
ALLERGIES_STATE_TOTAL TYPE STRING,
STATE_ICON_WDA TYPE STRING,
STATE_ICON_SAP TYPE STRING,
STATE_ICON_SUI TYPE STRING,
STATE_TEXT TYPE STRING,
STATE_ICON_TEXT TYPE STRING,
STATE_NOA_TEXT TYPE STRING,
ALLERGIES_ALL_TEXTE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1PAL_PATIENT_AD_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_RN1PAL_PATIENT_AD_STR-PATIENT_ID sy-vline 
WA_RN1PAL_PATIENT_AD_STR-PATIENT_ID_STRING sy-vline 
WA_RN1PAL_PATIENT_AD_STR-ALLERGIES_COUNT sy-vline 
WA_RN1PAL_PATIENT_AD_STR-ALLERGIES_STATE_TOTAL sy-vline 
WA_RN1PAL_PATIENT_AD_STR-STATE_ICON_WDA sy-vline 
WA_RN1PAL_PATIENT_AD_STR-STATE_ICON_SAP sy-vline 
WA_RN1PAL_PATIENT_AD_STR-STATE_ICON_SUI sy-vline 
WA_RN1PAL_PATIENT_AD_STR-STATE_TEXT sy-vline 
WA_RN1PAL_PATIENT_AD_STR-STATE_ICON_TEXT sy-vline 
WA_RN1PAL_PATIENT_AD_STR-STATE_NOA_TEXT sy-vline 
WA_RN1PAL_PATIENT_AD_STR-ALLERGIES_ALL_TEXTE sy-vline      INTO ld_text SEPARATED BY SPACE.

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