ABAP Select data from SAP table REXCITTASI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCITTASI
*  INTO TABLE @DATA(IT_REXCITTASI2).
*--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_REXCITTASI INDEX 1 INTO DATA(WA_REXCITTASI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCITTASI>-MANDT = 1.
<REXCITTASI>-INTRENO = 1.
<REXCITTASI>-DATEFROM = 1.
<REXCITTASI>-DATETO = 1.
<REXCITTASI>-SCENARIO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCITTASI-BUKRS, sy-vline,
  WA_REXCITTASI-RENTALSTAT, sy-vline,
  WA_REXCITTASI-ISACTIVEICI, sy-vline,
  WA_REXCITTASI-CURRENCY, sy-vline,
  WA_REXCITTASI-IS_EXEMPT, sy-vline,
  WA_REXCITTASI-REDUCTRATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCITTASI 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_REXCITTASI 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_REXCITTASI INTO WA_REXCITTASI.


*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 DATETO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REXCITTASI-DATETO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCITTASI-DATETO.
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_REXCITTASI_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
DATEFROM TYPE STRING,
DATETO TYPE STRING,
SCENARIO TYPE STRING,
BUKRS TYPE STRING,
RENTALSTAT TYPE STRING,
ISACTIVEICI TYPE STRING,
CURRENCY TYPE STRING,
IS_EXEMPT TYPE STRING,
REDUCTRATE TYPE STRING,
TASIRATE TYPE STRING,
ISMANUALRATE TYPE STRING,
LANDLRATE TYPE STRING,
TASIAMT TYPE STRING,
DATPRI TYPE STRING,
DATSEC TYPE STRING,
INSTPRIPAID TYPE STRING,
DOWNPAYMENT TYPE STRING,
BALANCE 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,END OF T_EKKO_STR.
DATA: WA_REXCITTASI_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_REXCITTASI_STR-MANDT sy-vline 
WA_REXCITTASI_STR-INTRENO sy-vline 
WA_REXCITTASI_STR-DATEFROM sy-vline 
WA_REXCITTASI_STR-DATETO sy-vline 
WA_REXCITTASI_STR-SCENARIO sy-vline 
WA_REXCITTASI_STR-BUKRS sy-vline 
WA_REXCITTASI_STR-RENTALSTAT sy-vline 
WA_REXCITTASI_STR-ISACTIVEICI sy-vline 
WA_REXCITTASI_STR-CURRENCY sy-vline 
WA_REXCITTASI_STR-IS_EXEMPT sy-vline 
WA_REXCITTASI_STR-REDUCTRATE sy-vline 
WA_REXCITTASI_STR-TASIRATE sy-vline 
WA_REXCITTASI_STR-ISMANUALRATE sy-vline 
WA_REXCITTASI_STR-LANDLRATE sy-vline 
WA_REXCITTASI_STR-TASIAMT sy-vline 
WA_REXCITTASI_STR-DATPRI sy-vline 
WA_REXCITTASI_STR-DATSEC sy-vline 
WA_REXCITTASI_STR-INSTPRIPAID sy-vline 
WA_REXCITTASI_STR-DOWNPAYMENT sy-vline 
WA_REXCITTASI_STR-BALANCE sy-vline 
WA_REXCITTASI_STR-RERF sy-vline 
WA_REXCITTASI_STR-DERF sy-vline 
WA_REXCITTASI_STR-TERF sy-vline 
WA_REXCITTASI_STR-REHER sy-vline 
WA_REXCITTASI_STR-RBEAR sy-vline 
WA_REXCITTASI_STR-DBEAR sy-vline 
WA_REXCITTASI_STR-TBEAR sy-vline 
WA_REXCITTASI_STR-RBHER sy-vline      INTO ld_text SEPARATED BY SPACE.

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