ABAP Select data from SAP table RNCARD into internal table

Get Example source ABAP code based on a different SAP table
  

Below is a number of ABAP code snippets to demonstrate how to select data from SAP RNCARD 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. 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 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 TYPE STANDARD TABLE OF RNCARD,
      WA_RNCARD TYPE RNCARD,
      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> TYPE RNCARD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RNCARD
*  INTO TABLE @DATA(IT_RNCARD2).
*--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 INDEX 1 INTO DATA(WA_RNCARD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RNCARD ASSIGNING <RNCARD>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<RNCARD>-KNAME = 1.
<RNCARD>-KNUMM = 1.
<RNCARD>-VKNR = 1.
<RNCARD>-VNUMM = 1.
<RNCARD>-VSTAT = 1.
ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RNCARD-VSTER, sy-vline,
WA_RNCARD-TITEL, sy-vline,
WA_RNCARD-VNAME, sy-vline,
WA_RNCARD-NAMZU, sy-vline,
WA_RNCARD-NNAME, sy-vline,
WA_RNCARD-GBDAT, sy-vline.
ENDLOOP. *Add any further fields from structure WA_RNCARD 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 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 INTO WA_RNCARD. *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.
ENDFORM. *&---------------------------------------------------------------------* *& Form process_as_string_field_values *&---------------------------------------------------------------------* FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO. TYPES: BEGIN OF T_RNCARD_STR,
KNAME TYPE STRING,
KNUMM TYPE STRING,
VKNR TYPE STRING,
VNUMM TYPE STRING,
VSTAT TYPE STRING,
VSTER TYPE STRING,
TITEL TYPE STRING,
VNAME TYPE STRING,
NAMZU TYPE STRING,
NNAME TYPE STRING,
GBDAT TYPE STRING,
STRAS TYPE STRING,
LAND TYPE STRING,
PSTLZ TYPE STRING,
ORT TYPE STRING,
ENDDT TYPE STRING,
PRUEF TYPE STRING,
PCARD TYPE STRING,
KATNR TYPE STRING,
VCODE TYPE STRING,
UNKNOWN_GBDAT TYPE STRING,
KVDAT TYPE STRING,
VKZML TYPE STRING,
INSID TYPE STRING,END OF T_EKKO_STR. DATA: WA_RNCARD_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_STR-KNAME sy-vline
WA_RNCARD_STR-KNUMM sy-vline
WA_RNCARD_STR-VKNR sy-vline
WA_RNCARD_STR-VNUMM sy-vline
WA_RNCARD_STR-VSTAT sy-vline
WA_RNCARD_STR-VSTER sy-vline
WA_RNCARD_STR-TITEL sy-vline
WA_RNCARD_STR-VNAME sy-vline
WA_RNCARD_STR-NAMZU sy-vline
WA_RNCARD_STR-NNAME sy-vline
WA_RNCARD_STR-GBDAT sy-vline
WA_RNCARD_STR-STRAS sy-vline
WA_RNCARD_STR-LAND sy-vline
WA_RNCARD_STR-PSTLZ sy-vline
WA_RNCARD_STR-ORT sy-vline
WA_RNCARD_STR-ENDDT sy-vline
WA_RNCARD_STR-PRUEF sy-vline
WA_RNCARD_STR-PCARD sy-vline
WA_RNCARD_STR-KATNR sy-vline
WA_RNCARD_STR-VCODE sy-vline
WA_RNCARD_STR-UNKNOWN_GBDAT sy-vline
WA_RNCARD_STR-KVDAT sy-vline
WA_RNCARD_STR-VKZML sy-vline
WA_RNCARD_STR-INSID sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.