ABAP Select data from SAP table REOR_RESERVATION_COST_L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REOR_RESERVATION_COST_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 REOR_RESERVATION_COST_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 REOR_RESERVATION_COST_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_REOR_RESERVATION_COST_L TYPE STANDARD TABLE OF REOR_RESERVATION_COST_L,
      WA_REOR_RESERVATION_COST_L TYPE REOR_RESERVATION_COST_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: <REOR_RESERVATION_COST_L> TYPE REOR_RESERVATION_COST_L.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REOR_RESERVATION_COST_L
*  INTO TABLE @DATA(IT_REOR_RESERVATION_COST_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_REOR_RESERVATION_COST_L INDEX 1 INTO DATA(WA_REOR_RESERVATION_COST_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REOR_RESERVATION_COST_L>-MANDT = 1.
<REOR_RESERVATION_COST_L>-COSTGUID = 1.
<REOR_RESERVATION_COST_L>-PROCESSGUID = 1.
<REOR_RESERVATION_COST_L>-OBJNROO = 1.
<REOR_RESERVATION_COST_L>-VALIDFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REOR_RESERVATION_COST_L-VALIDTO, sy-vline,
  WA_REOR_RESERVATION_COST_L-OCCOBJNR, sy-vline,
  WA_REOR_RESERVATION_COST_L-OCCOBJPERCENT, sy-vline,
  WA_REOR_RESERVATION_COST_L-ACCTASSOBJNR, sy-vline,
  WA_REOR_RESERVATION_COST_L-CONDTYPE, sy-vline,
  WA_REOR_RESERVATION_COST_L-SRVTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REOR_RESERVATION_COST_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_REOR_RESERVATION_COST_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_REOR_RESERVATION_COST_L INTO WA_REOR_RESERVATION_COST_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 RETZS, internal->external for field VALIDFROM
CALL FUNCTION 'CONVERSION_EXIT_RETZS_OUTPUT'
  EXPORTING
    input =                      WA_REOR_RESERVATION_COST_L-VALIDFROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REOR_RESERVATION_COST_L-VALIDFROM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit RETZS, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_RETZS_OUTPUT'
  EXPORTING
    input =                      WA_REOR_RESERVATION_COST_L-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REOR_RESERVATION_COST_L-VALIDTO.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field REVBELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REOR_RESERVATION_COST_L-REVBELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REOR_RESERVATION_COST_L-REVBELNR.
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_REOR_RESERVATION_COST_L_STR, 
MANDT TYPE STRING,
COSTGUID TYPE STRING,
PROCESSGUID TYPE STRING,
OBJNROO TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
OCCOBJNR TYPE STRING,
OCCOBJPERCENT TYPE STRING,
ACCTASSOBJNR TYPE STRING,
CONDTYPE TYPE STRING,
SRVTYPE TYPE STRING,
FLOWTYPE TYPE STRING,
PRICE TYPE STRING,
PRICECURRKEY TYPE STRING,
ISPOSTEXT TYPE STRING,
EXTINVREC TYPE STRING,
PAYMENTSTATUS TYPE STRING,
ISREVERSAL TYPE STRING,
SETTLETYPE TYPE STRING,
DOCGUID TYPE STRING,
ITEMNO TYPE STRING,
CFPAYGUID TYPE STRING,
KOKRS TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
ISCOSTREVERSED TYPE STRING,
REVBELNR TYPE STRING,
RSBUKRS TYPE STRING,
OCCIDENT TYPE STRING,
ACCTASSIDENT TYPE STRING,
XCONDTYPE TYPE STRING,
XFLOWTYPE TYPE STRING,
XSRVTYPE TYPE STRING,
XSETTLETYPE TYPE STRING,
XPAYMENTSTATUS TYPE STRING,
PRICECODE TYPE STRING,
CFSTATUS TYPE STRING,
ICONCFSTATUS TYPE STRING,
IDENTKEYCN TYPE STRING,
DOCNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REOR_RESERVATION_COST_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_REOR_RESERVATION_COST_L_STR-MANDT sy-vline 
WA_REOR_RESERVATION_COST_L_STR-COSTGUID sy-vline 
WA_REOR_RESERVATION_COST_L_STR-PROCESSGUID sy-vline 
WA_REOR_RESERVATION_COST_L_STR-OBJNROO sy-vline 
WA_REOR_RESERVATION_COST_L_STR-VALIDFROM sy-vline 
WA_REOR_RESERVATION_COST_L_STR-VALIDTO sy-vline 
WA_REOR_RESERVATION_COST_L_STR-OCCOBJNR sy-vline 
WA_REOR_RESERVATION_COST_L_STR-OCCOBJPERCENT sy-vline 
WA_REOR_RESERVATION_COST_L_STR-ACCTASSOBJNR sy-vline 
WA_REOR_RESERVATION_COST_L_STR-CONDTYPE sy-vline 
WA_REOR_RESERVATION_COST_L_STR-SRVTYPE sy-vline 
WA_REOR_RESERVATION_COST_L_STR-FLOWTYPE sy-vline 
WA_REOR_RESERVATION_COST_L_STR-PRICE sy-vline 
WA_REOR_RESERVATION_COST_L_STR-PRICECURRKEY sy-vline 
WA_REOR_RESERVATION_COST_L_STR-ISPOSTEXT sy-vline 
WA_REOR_RESERVATION_COST_L_STR-EXTINVREC sy-vline 
WA_REOR_RESERVATION_COST_L_STR-PAYMENTSTATUS sy-vline 
WA_REOR_RESERVATION_COST_L_STR-ISREVERSAL sy-vline 
WA_REOR_RESERVATION_COST_L_STR-SETTLETYPE sy-vline 
WA_REOR_RESERVATION_COST_L_STR-DOCGUID sy-vline 
WA_REOR_RESERVATION_COST_L_STR-ITEMNO sy-vline 
WA_REOR_RESERVATION_COST_L_STR-CFPAYGUID sy-vline 
WA_REOR_RESERVATION_COST_L_STR-KOKRS sy-vline 
WA_REOR_RESERVATION_COST_L_STR-BELNR sy-vline 
WA_REOR_RESERVATION_COST_L_STR-BUZEI sy-vline 
WA_REOR_RESERVATION_COST_L_STR-ISCOSTREVERSED sy-vline 
WA_REOR_RESERVATION_COST_L_STR-REVBELNR sy-vline 
WA_REOR_RESERVATION_COST_L_STR-RSBUKRS sy-vline 
WA_REOR_RESERVATION_COST_L_STR-OCCIDENT sy-vline 
WA_REOR_RESERVATION_COST_L_STR-ACCTASSIDENT sy-vline 
WA_REOR_RESERVATION_COST_L_STR-XCONDTYPE sy-vline 
WA_REOR_RESERVATION_COST_L_STR-XFLOWTYPE sy-vline 
WA_REOR_RESERVATION_COST_L_STR-XSRVTYPE sy-vline 
WA_REOR_RESERVATION_COST_L_STR-XSETTLETYPE sy-vline 
WA_REOR_RESERVATION_COST_L_STR-XPAYMENTSTATUS sy-vline 
WA_REOR_RESERVATION_COST_L_STR-PRICECODE sy-vline 
WA_REOR_RESERVATION_COST_L_STR-CFSTATUS sy-vline 
WA_REOR_RESERVATION_COST_L_STR-ICONCFSTATUS sy-vline 
WA_REOR_RESERVATION_COST_L_STR-IDENTKEYCN sy-vline 
WA_REOR_RESERVATION_COST_L_STR-DOCNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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