ABAP Select data from SAP table REXCITCAD_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCITCAD_L
*  INTO TABLE @DATA(IT_REXCITCAD_L2).
*--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_REXCITCAD_L INDEX 1 INTO DATA(WA_REXCITCAD_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCITCAD_L>-AOID = 1.
<REXCITCAD_L>-AOTYPE = 1.
<REXCITCAD_L>-AONR = 1.
<REXCITCAD_L>-VALIDFROM = 1.
<REXCITCAD_L>-VALIDTO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCITCAD_L-MANDT, sy-vline,
  WA_REXCITCAD_L-INTRENO, sy-vline,
  WA_REXCITCAD_L-CITYCODE, sy-vline,
  WA_REXCITCAD_L-ADMINDIVISION, sy-vline,
  WA_REXCITCAD_L-CENSUSDIVISION, sy-vline,
  WA_REXCITCAD_L-CITYDIVISION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCITCAD_L 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_REXCITCAD_L 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_REXCITCAD_L INTO WA_REXCITCAD_L.


*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 REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REXCITCAD_L-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCITCAD_L-VALIDTO.
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_REXCITCAD_L_STR, 
AOID TYPE STRING,
AOTYPE TYPE STRING,
AONR TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
MANDT TYPE STRING,
INTRENO TYPE STRING,
CITYCODE TYPE STRING,
ADMINDIVISION TYPE STRING,
CENSUSDIVISION TYPE STRING,
CITYDIVISION TYPE STRING,
SHEET TYPE STRING,
PARCEL TYPE STRING,
QUALITY TYPE STRING,
DENOMINATOR TYPE STRING,
SUBALTERN TYPE STRING,
CLASS TYPE STRING,
UIUOBJNR TYPE STRING,
UIUINTRENO TYPE STRING,
ORIGAOID TYPE STRING,
DERIVAOID TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
ALVROWS TYPE STRING,
UIUXIDENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCITCAD_L_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_REXCITCAD_L_STR-AOID sy-vline 
WA_REXCITCAD_L_STR-AOTYPE sy-vline 
WA_REXCITCAD_L_STR-AONR sy-vline 
WA_REXCITCAD_L_STR-VALIDFROM sy-vline 
WA_REXCITCAD_L_STR-VALIDTO sy-vline 
WA_REXCITCAD_L_STR-MANDT sy-vline 
WA_REXCITCAD_L_STR-INTRENO sy-vline 
WA_REXCITCAD_L_STR-CITYCODE sy-vline 
WA_REXCITCAD_L_STR-ADMINDIVISION sy-vline 
WA_REXCITCAD_L_STR-CENSUSDIVISION sy-vline 
WA_REXCITCAD_L_STR-CITYDIVISION sy-vline 
WA_REXCITCAD_L_STR-SHEET sy-vline 
WA_REXCITCAD_L_STR-PARCEL sy-vline 
WA_REXCITCAD_L_STR-QUALITY sy-vline 
WA_REXCITCAD_L_STR-DENOMINATOR sy-vline 
WA_REXCITCAD_L_STR-SUBALTERN sy-vline 
WA_REXCITCAD_L_STR-CLASS sy-vline 
WA_REXCITCAD_L_STR-UIUOBJNR sy-vline 
WA_REXCITCAD_L_STR-UIUINTRENO sy-vline 
WA_REXCITCAD_L_STR-ORIGAOID sy-vline 
WA_REXCITCAD_L_STR-DERIVAOID sy-vline 
WA_REXCITCAD_L_STR-RERF sy-vline 
WA_REXCITCAD_L_STR-DERF sy-vline 
WA_REXCITCAD_L_STR-TERF sy-vline 
WA_REXCITCAD_L_STR-REHER sy-vline 
WA_REXCITCAD_L_STR-RBEAR sy-vline 
WA_REXCITCAD_L_STR-DBEAR sy-vline 
WA_REXCITCAD_L_STR-TBEAR sy-vline 
WA_REXCITCAD_L_STR-RBHER sy-vline 
WA_REXCITCAD_L_STR-ALVROWS sy-vline 
WA_REXCITCAD_L_STR-UIUXIDENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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