ABAP Select data from SAP table RNCARD_EGK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNCARD_EGK
*  INTO TABLE @DATA(IT_RNCARD_EGK2).
*--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_RNCARD_EGK INDEX 1 INTO DATA(WA_RNCARD_EGK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNCARD_EGK>-CRDTYPE = 1.
<RNCARD_EGK>-EXT_KEY1 = 1.
<RNCARD_EGK>-EXT_KEY2 = 1.
<RNCARD_EGK>-BIRTHDT = 1.
<RNCARD_EGK>-INSID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNCARD_EGK-AD_PREFIX_TXT, sy-vline,
  WA_RNCARD_EGK-AD_TITLES_TXT, sy-vline,
  WA_RNCARD_EGK-AD_TITLE1_TXT, sy-vline,
  WA_RNCARD_EGK-POST_CODE2, sy-vline,
  WA_RNCARD_EGK-PO_BOX_LOC, sy-vline,
  WA_RNCARD_EGK-PO_BOX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RNCARD_EGK 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_RNCARD_EGK 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_RNCARD_EGK INTO WA_RNCARD_EGK.


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

*Conversion exit ALPHA, internal->external for field ABR_KOSTR_INSTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RNCARD_EGK-ABR_KOSTR_INSTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RNCARD_EGK-ABR_KOSTR_INSTN.
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_RNCARD_EGK_STR, 
CRDTYPE TYPE STRING,
EXT_KEY1 TYPE STRING,
EXT_KEY2 TYPE STRING,
BIRTHDT TYPE STRING,
INSID TYPE STRING,
AD_PREFIX_TXT TYPE STRING,
AD_TITLES_TXT TYPE STRING,
AD_TITLE1_TXT TYPE STRING,
POST_CODE2 TYPE STRING,
PO_BOX_LOC TYPE STRING,
PO_BOX TYPE STRING,
PO_BOX_CTY TYPE STRING,
POST_CODE1 TYPE STRING,
CITY TYPE STRING,
COUNTRY TYPE STRING,
STREET TYPE STRING,
HOUSE_NUM TYPE STRING,
STREET_SUPPL TYPE STRING,
EGK_CDM_PVSD TYPE STRING,
EGK_NAMEF TYPE STRING,
EGK_NAMEL TYPE STRING,
EGK_GSCHL TYPE STRING,
KOSTR_INSTN TYPE STRING,
KOSTR_LAND TYPE STRING,
COV_BEGDT TYPE STRING,
COV_ENDDT TYPE STRING,
ABR_KOSTR_INSTN TYPE STRING,
EGK_CDM_AVSD TYPE STRING,
EGK_KOSTR_NAME TYPE STRING,
EGK_ABR_KOSTR_NA TYPE STRING,
EGK_RECHTSKREIS TYPE STRING,
EGK_VERS_ART TYPE STRING,
EGK_VERS_STAT_RS TYPE STRING,
EGK_KOSTENERST_A TYPE STRING,
EGK_KOSTENERST_S TYPE STRING,
EGK_WOP TYPE STRING,
EGK_PKV_VERB_TAR TYPE STRING,
EGK_PKV_BEIH_BER TYPE STRING,
EGK_STAT_WLU TYPE STRING,
EGK_WLU_PROZ TYPE STRING,
EGK_HS_WLU TYPE STRING,
EGK_STAT_WLA TYPE STRING,
EGK_STAT_WLA_PRO TYPE STRING,
EGK_PKV_CLINICCA TYPE STRING,
EGK_CDM_GVSD TYPE STRING,
EGK_ZUZA_STATUS TYPE STRING,
EGK_ZUZA_STATU_B TYPE STRING,
EGK_BES_PERS_GRU TYPE STRING,
EGK_DMP_KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RNCARD_EGK_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_RNCARD_EGK_STR-CRDTYPE sy-vline 
WA_RNCARD_EGK_STR-EXT_KEY1 sy-vline 
WA_RNCARD_EGK_STR-EXT_KEY2 sy-vline 
WA_RNCARD_EGK_STR-BIRTHDT sy-vline 
WA_RNCARD_EGK_STR-INSID sy-vline 
WA_RNCARD_EGK_STR-AD_PREFIX_TXT sy-vline 
WA_RNCARD_EGK_STR-AD_TITLES_TXT sy-vline 
WA_RNCARD_EGK_STR-AD_TITLE1_TXT sy-vline 
WA_RNCARD_EGK_STR-POST_CODE2 sy-vline 
WA_RNCARD_EGK_STR-PO_BOX_LOC sy-vline 
WA_RNCARD_EGK_STR-PO_BOX sy-vline 
WA_RNCARD_EGK_STR-PO_BOX_CTY sy-vline 
WA_RNCARD_EGK_STR-POST_CODE1 sy-vline 
WA_RNCARD_EGK_STR-CITY sy-vline 
WA_RNCARD_EGK_STR-COUNTRY sy-vline 
WA_RNCARD_EGK_STR-STREET sy-vline 
WA_RNCARD_EGK_STR-HOUSE_NUM sy-vline 
WA_RNCARD_EGK_STR-STREET_SUPPL sy-vline 
WA_RNCARD_EGK_STR-EGK_CDM_PVSD sy-vline 
WA_RNCARD_EGK_STR-EGK_NAMEF sy-vline 
WA_RNCARD_EGK_STR-EGK_NAMEL sy-vline 
WA_RNCARD_EGK_STR-EGK_GSCHL sy-vline 
WA_RNCARD_EGK_STR-KOSTR_INSTN sy-vline 
WA_RNCARD_EGK_STR-KOSTR_LAND sy-vline 
WA_RNCARD_EGK_STR-COV_BEGDT sy-vline 
WA_RNCARD_EGK_STR-COV_ENDDT sy-vline 
WA_RNCARD_EGK_STR-ABR_KOSTR_INSTN sy-vline 
WA_RNCARD_EGK_STR-EGK_CDM_AVSD sy-vline 
WA_RNCARD_EGK_STR-EGK_KOSTR_NAME sy-vline 
WA_RNCARD_EGK_STR-EGK_ABR_KOSTR_NA sy-vline 
WA_RNCARD_EGK_STR-EGK_RECHTSKREIS sy-vline 
WA_RNCARD_EGK_STR-EGK_VERS_ART sy-vline 
WA_RNCARD_EGK_STR-EGK_VERS_STAT_RS sy-vline 
WA_RNCARD_EGK_STR-EGK_KOSTENERST_A sy-vline 
WA_RNCARD_EGK_STR-EGK_KOSTENERST_S sy-vline 
WA_RNCARD_EGK_STR-EGK_WOP sy-vline 
WA_RNCARD_EGK_STR-EGK_PKV_VERB_TAR sy-vline 
WA_RNCARD_EGK_STR-EGK_PKV_BEIH_BER sy-vline 
WA_RNCARD_EGK_STR-EGK_STAT_WLU sy-vline 
WA_RNCARD_EGK_STR-EGK_WLU_PROZ sy-vline 
WA_RNCARD_EGK_STR-EGK_HS_WLU sy-vline 
WA_RNCARD_EGK_STR-EGK_STAT_WLA sy-vline 
WA_RNCARD_EGK_STR-EGK_STAT_WLA_PRO sy-vline 
WA_RNCARD_EGK_STR-EGK_PKV_CLINICCA sy-vline 
WA_RNCARD_EGK_STR-EGK_CDM_GVSD sy-vline 
WA_RNCARD_EGK_STR-EGK_ZUZA_STATUS sy-vline 
WA_RNCARD_EGK_STR-EGK_ZUZA_STATU_B sy-vline 
WA_RNCARD_EGK_STR-EGK_BES_PERS_GRU sy-vline 
WA_RNCARD_EGK_STR-EGK_DMP_KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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