ABAP Select data from SAP table REXCITIMU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCITIMU
*  INTO TABLE @DATA(IT_REXCITIMU2).
*--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_REXCITIMU INDEX 1 INTO DATA(WA_REXCITIMU2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCITIMU-ICIAMOUNT, sy-vline,
  WA_REXCITIMU-POSTALCODE, sy-vline,
  WA_REXCITIMU-CITY, sy-vline,
  WA_REXCITIMU-ICIRATE, sy-vline,
  WA_REXCITIMU-ISMANUALRATE, sy-vline,
  WA_REXCITIMU-ICICOLLECTOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCITIMU 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_REXCITIMU 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_REXCITIMU INTO WA_REXCITIMU.


*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_REXCITIMU-DATETO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCITIMU-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_REXCITIMU_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
DATEFROM TYPE STRING,
CURRENCY TYPE STRING,
DATETO TYPE STRING,
ICIAMOUNT TYPE STRING,
POSTALCODE TYPE STRING,
CITY TYPE STRING,
ICIRATE TYPE STRING,
ISMANUALRATE TYPE STRING,
ICICOLLECTOR TYPE STRING,
ACCNO TYPE STRING,
CATID TYPE STRING,
CATCOEFF TYPE STRING,
CALCTYPE TYPE STRING,
AOVALUE TYPE STRING,
BASEAMOUNT TYPE STRING,
TAXBASE TYPE STRING,
MONOWN TYPE STRING,
PERCOWN TYPE STRING,
MONEXCL TYPE STRING,
DETRAMOUNT TYPE STRING,
DETRACTPREC TYPE STRING,
RAISPERC TYPE STRING,
ISANNUALPAY TYPE STRING,
DATPRI TYPE STRING,
INSTPRIPAID TYPE STRING,
DOWNPAYMENT TYPE STRING,
DATSEC TYPE STRING,
BALANCE TYPE STRING,
ISACTIVEICI TYPE STRING,
ASSIGINTRENO TYPE STRING,
ASSIGOBJNR TYPE STRING,
BUKRS TYPE STRING,
IS_EXEMPT TYPE STRING,
IS_UNINHABIT TYPE STRING,
IS_HISTORIC TYPE STRING,
COUNTRYRATE TYPE STRING,
CITYRATE TYPE STRING,
DOWNPAYMENTCITY TYPE STRING,
DOWNPAYMENTCNTRY TYPE STRING,
BALANCECITY TYPE STRING,
BALANCECOUNTRY TYPE STRING,
CITYAMOUNT TYPE STRING,
COUNTRYAMOUNT TYPE STRING,
REDUCTION TYPE STRING,
NOIMUCALC 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_REXCITIMU_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_REXCITIMU_STR-MANDT sy-vline 
WA_REXCITIMU_STR-INTRENO sy-vline 
WA_REXCITIMU_STR-DATEFROM sy-vline 
WA_REXCITIMU_STR-CURRENCY sy-vline 
WA_REXCITIMU_STR-DATETO sy-vline 
WA_REXCITIMU_STR-ICIAMOUNT sy-vline 
WA_REXCITIMU_STR-POSTALCODE sy-vline 
WA_REXCITIMU_STR-CITY sy-vline 
WA_REXCITIMU_STR-ICIRATE sy-vline 
WA_REXCITIMU_STR-ISMANUALRATE sy-vline 
WA_REXCITIMU_STR-ICICOLLECTOR sy-vline 
WA_REXCITIMU_STR-ACCNO sy-vline 
WA_REXCITIMU_STR-CATID sy-vline 
WA_REXCITIMU_STR-CATCOEFF sy-vline 
WA_REXCITIMU_STR-CALCTYPE sy-vline 
WA_REXCITIMU_STR-AOVALUE sy-vline 
WA_REXCITIMU_STR-BASEAMOUNT sy-vline 
WA_REXCITIMU_STR-TAXBASE sy-vline 
WA_REXCITIMU_STR-MONOWN sy-vline 
WA_REXCITIMU_STR-PERCOWN sy-vline 
WA_REXCITIMU_STR-MONEXCL sy-vline 
WA_REXCITIMU_STR-DETRAMOUNT sy-vline 
WA_REXCITIMU_STR-DETRACTPREC sy-vline 
WA_REXCITIMU_STR-RAISPERC sy-vline 
WA_REXCITIMU_STR-ISANNUALPAY sy-vline 
WA_REXCITIMU_STR-DATPRI sy-vline 
WA_REXCITIMU_STR-INSTPRIPAID sy-vline 
WA_REXCITIMU_STR-DOWNPAYMENT sy-vline 
WA_REXCITIMU_STR-DATSEC sy-vline 
WA_REXCITIMU_STR-BALANCE sy-vline 
WA_REXCITIMU_STR-ISACTIVEICI sy-vline 
WA_REXCITIMU_STR-ASSIGINTRENO sy-vline 
WA_REXCITIMU_STR-ASSIGOBJNR sy-vline 
WA_REXCITIMU_STR-BUKRS sy-vline 
WA_REXCITIMU_STR-IS_EXEMPT sy-vline 
WA_REXCITIMU_STR-IS_UNINHABIT sy-vline 
WA_REXCITIMU_STR-IS_HISTORIC sy-vline 
WA_REXCITIMU_STR-COUNTRYRATE sy-vline 
WA_REXCITIMU_STR-CITYRATE sy-vline 
WA_REXCITIMU_STR-DOWNPAYMENTCITY sy-vline 
WA_REXCITIMU_STR-DOWNPAYMENTCNTRY sy-vline 
WA_REXCITIMU_STR-BALANCECITY sy-vline 
WA_REXCITIMU_STR-BALANCECOUNTRY sy-vline 
WA_REXCITIMU_STR-CITYAMOUNT sy-vline 
WA_REXCITIMU_STR-COUNTRYAMOUNT sy-vline 
WA_REXCITIMU_STR-REDUCTION sy-vline 
WA_REXCITIMU_STR-NOIMUCALC sy-vline 
WA_REXCITIMU_STR-RERF sy-vline 
WA_REXCITIMU_STR-DERF sy-vline 
WA_REXCITIMU_STR-TERF sy-vline 
WA_REXCITIMU_STR-REHER sy-vline 
WA_REXCITIMU_STR-RBEAR sy-vline 
WA_REXCITIMU_STR-DBEAR sy-vline 
WA_REXCITIMU_STR-TBEAR sy-vline 
WA_REXCITIMU_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.