ABAP Select data from SAP table RCWBT into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCWBT 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 RCWBT. 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 RCWBT 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_RCWBT TYPE STANDARD TABLE OF RCWBT,
      WA_RCWBT TYPE RCWBT,
      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: <RCWBT> TYPE RCWBT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCWBT
*  INTO TABLE @DATA(IT_RCWBT2).
*--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_RCWBT INDEX 1 INTO DATA(WA_RCWBT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCWBT>-POSID = 1.
<RCWBT>-POST1 = 1.
<RCWBT>-POSKI = 1.
<RCWBT>-PSTRT = 1.
<RCWBT>-PENDE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCWBT-PDAUR, sy-vline,
  WA_RCWBT-PEINH, sy-vline,
  WA_RCWBT-ESTRT, sy-vline,
  WA_RCWBT-EENDE, sy-vline,
  WA_RCWBT-EDAUR, sy-vline,
  WA_RCWBT-EEINH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCWBT 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_RCWBT 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_RCWBT INTO WA_RCWBT.


*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 CUNIT, internal->external for field PEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCWBT-PEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWBT-PEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCWBT-EEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWBT-EEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field IEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCWBT-IEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWBT-IEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EINHT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCWBT-EINHT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWBT-EINHT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCWBT-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWBT-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field DIFSE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCWBT-DIFSE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWBT-DIFSE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field DIFEE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RCWBT-DIFEE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWBT-DIFEE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field VSPOSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RCWBT-VSPOSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWBT-VSPOSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field VSPSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_RCWBT-VSPSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCWBT-VSPSPID.
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_RCWBT_STR, 
POSID TYPE STRING,
POST1 TYPE STRING,
POSKI TYPE STRING,
PSTRT TYPE STRING,
PENDE TYPE STRING,
PDAUR TYPE STRING,
PEINH TYPE STRING,
ESTRT TYPE STRING,
EENDE TYPE STRING,
EDAUR TYPE STRING,
EEINH TYPE STRING,
ISTRT TYPE STRING,
IENDE TYPE STRING,
IDAUR TYPE STRING,
IEINH TYPE STRING,
STERM TYPE STRING,
ETERM TYPE STRING,
DAUER TYPE STRING,
EINHT TYPE STRING,
STUFE TYPE STRING,
SELKZ TYPE STRING,
SLHIE TYPE STRING,
IDENT TYPE STRING,
LFDNR TYPE STRING,
PLART TYPE STRING,
PLFRM TYPE STRING,
AUFNR TYPE STRING,
MSTRT TYPE STRING,
MENDE TYPE STRING,
PIDEN TYPE STRING,
UNTRG TYPE STRING,
OBJCT TYPE STRING,
KENNR TYPE STRING,
INCLA TYPE STRING,
VRGNG TYPE STRING,
NTER TYPE STRING,
DIFFS TYPE STRING,
DIFSE TYPE STRING,
DIFFE TYPE STRING,
DIFEE TYPE STRING,
IRUCK TYPE STRING,
CORPD TYPE STRING,
REPID TYPE STRING,
BELAS TYPE STRING,
PSPPR TYPE STRING,
TRMRP TYPE STRING,
TRMPRF TYPE STRING,
BEZEI TYPE STRING,
VSNMR TYPE STRING,
SEARCH TYPE STRING,
VSPOSID TYPE STRING,
VSPSPID TYPE STRING,
VSKAT TYPE STRING,
VRGNG_IC TYPE STRING,
FSAVD TYPE STRING,
FSEDD TYPE STRING,
SSAVD TYPE STRING,
SSEDD TYPE STRING,
FPAVD TYPE STRING,
FPEDD TYPE STRING,
SPAVD TYPE STRING,
SPEDD TYPE STRING,
VISTR TYPE STRING,
VIEND TYPE STRING,
SCHED_INST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCWBT_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_RCWBT_STR-POSID sy-vline 
WA_RCWBT_STR-POST1 sy-vline 
WA_RCWBT_STR-POSKI sy-vline 
WA_RCWBT_STR-PSTRT sy-vline 
WA_RCWBT_STR-PENDE sy-vline 
WA_RCWBT_STR-PDAUR sy-vline 
WA_RCWBT_STR-PEINH sy-vline 
WA_RCWBT_STR-ESTRT sy-vline 
WA_RCWBT_STR-EENDE sy-vline 
WA_RCWBT_STR-EDAUR sy-vline 
WA_RCWBT_STR-EEINH sy-vline 
WA_RCWBT_STR-ISTRT sy-vline 
WA_RCWBT_STR-IENDE sy-vline 
WA_RCWBT_STR-IDAUR sy-vline 
WA_RCWBT_STR-IEINH sy-vline 
WA_RCWBT_STR-STERM sy-vline 
WA_RCWBT_STR-ETERM sy-vline 
WA_RCWBT_STR-DAUER sy-vline 
WA_RCWBT_STR-EINHT sy-vline 
WA_RCWBT_STR-STUFE sy-vline 
WA_RCWBT_STR-SELKZ sy-vline 
WA_RCWBT_STR-SLHIE sy-vline 
WA_RCWBT_STR-IDENT sy-vline 
WA_RCWBT_STR-LFDNR sy-vline 
WA_RCWBT_STR-PLART sy-vline 
WA_RCWBT_STR-PLFRM sy-vline 
WA_RCWBT_STR-AUFNR sy-vline 
WA_RCWBT_STR-MSTRT sy-vline 
WA_RCWBT_STR-MENDE sy-vline 
WA_RCWBT_STR-PIDEN sy-vline 
WA_RCWBT_STR-UNTRG sy-vline 
WA_RCWBT_STR-OBJCT sy-vline 
WA_RCWBT_STR-KENNR sy-vline 
WA_RCWBT_STR-INCLA sy-vline 
WA_RCWBT_STR-VRGNG sy-vline 
WA_RCWBT_STR-NTER sy-vline 
WA_RCWBT_STR-DIFFS sy-vline 
WA_RCWBT_STR-DIFSE sy-vline 
WA_RCWBT_STR-DIFFE sy-vline 
WA_RCWBT_STR-DIFEE sy-vline 
WA_RCWBT_STR-IRUCK sy-vline 
WA_RCWBT_STR-CORPD sy-vline 
WA_RCWBT_STR-REPID sy-vline 
WA_RCWBT_STR-BELAS sy-vline 
WA_RCWBT_STR-PSPPR sy-vline 
WA_RCWBT_STR-TRMRP sy-vline 
WA_RCWBT_STR-TRMPRF sy-vline 
WA_RCWBT_STR-BEZEI sy-vline 
WA_RCWBT_STR-VSNMR sy-vline 
WA_RCWBT_STR-SEARCH sy-vline 
WA_RCWBT_STR-VSPOSID sy-vline 
WA_RCWBT_STR-VSPSPID sy-vline 
WA_RCWBT_STR-VSKAT sy-vline 
WA_RCWBT_STR-VRGNG_IC sy-vline 
WA_RCWBT_STR-FSAVD sy-vline 
WA_RCWBT_STR-FSEDD sy-vline 
WA_RCWBT_STR-SSAVD sy-vline 
WA_RCWBT_STR-SSEDD sy-vline 
WA_RCWBT_STR-FPAVD sy-vline 
WA_RCWBT_STR-FPEDD sy-vline 
WA_RCWBT_STR-SPAVD sy-vline 
WA_RCWBT_STR-SPEDD sy-vline 
WA_RCWBT_STR-VISTR sy-vline 
WA_RCWBT_STR-VIEND sy-vline 
WA_RCWBT_STR-SCHED_INST sy-vline      INTO ld_text SEPARATED BY SPACE.

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