ABAP Select data from SAP table BCSS_RESV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BCSS_RESV
*  INTO TABLE @DATA(IT_BCSS_RESV2).
*--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_BCSS_RESV INDEX 1 INTO DATA(WA_BCSS_RESV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BCSS_RESV>-USER = 1.
<BCSS_RESV>-USERNAME = 1.
<BCSS_RESV>-USRTP = 1.
<BCSS_RESV>-USRYR = 1.
<BCSS_RESV>-USRNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BCSS_RESV-DLI, sy-vline,
  WA_BCSS_RESV-DLINAME, sy-vline,
  WA_BCSS_RESV-PRIVATE, sy-vline,
  WA_BCSS_RESV-OBJTP, sy-vline,
  WA_BCSS_RESV-OBJYR, sy-vline,
  WA_BCSS_RESV-OBJNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BCSS_RESV 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_BCSS_RESV 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_BCSS_RESV INTO WA_BCSS_RESV.


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

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

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

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

*Conversion exit SPDEV, internal->external for field DEVICE
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_BCSS_RESV-DEVICE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BCSS_RESV-DEVICE.
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_BCSS_RESV_STR, 
USER TYPE STRING,
USERNAME TYPE STRING,
USRTP TYPE STRING,
USRYR TYPE STRING,
USRNO TYPE STRING,
DLI TYPE STRING,
DLINAME TYPE STRING,
PRIVATE TYPE STRING,
OBJTP TYPE STRING,
OBJYR TYPE STRING,
OBJNO TYPE STRING,
ORG_UNIT TYPE STRING,
BOR_OBJECT TYPE STRING,
OBJKEY TYPE STRING,
OBJTYPE TYPE STRING,
LOGSYS TYPE STRING,
CAM_ADDRES TYPE STRING,
ADDRNUMBER TYPE STRING,
PERSNUMBER TYPE STRING,
COMMTYPE TYPE STRING,
CONSNUMBER TYPE STRING,
SO_KEY TYPE STRING,
SPOOL TYPE STRING,
DEPARTMENT TYPE STRING,
COVER TYPE STRING,
COVERTEXT TYPE STRING,
AUTHORIZTN TYPE STRING,
DEVICE TYPE STRING,
SPOOLNAME TYPE STRING,
SUFFIX1 TYPE STRING,
SUFFIX2 TYPE STRING,
PRNTIMMED TYPE STRING,
DELSPOOL TYPE STRING,
COPIES TYPE STRING,
NEWSPOOL TYPE STRING,
TDGROUP TYPE STRING,
RECIPIENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BCSS_RESV_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_BCSS_RESV_STR-USER sy-vline 
WA_BCSS_RESV_STR-USERNAME sy-vline 
WA_BCSS_RESV_STR-USRTP sy-vline 
WA_BCSS_RESV_STR-USRYR sy-vline 
WA_BCSS_RESV_STR-USRNO sy-vline 
WA_BCSS_RESV_STR-DLI sy-vline 
WA_BCSS_RESV_STR-DLINAME sy-vline 
WA_BCSS_RESV_STR-PRIVATE sy-vline 
WA_BCSS_RESV_STR-OBJTP sy-vline 
WA_BCSS_RESV_STR-OBJYR sy-vline 
WA_BCSS_RESV_STR-OBJNO sy-vline 
WA_BCSS_RESV_STR-ORG_UNIT sy-vline 
WA_BCSS_RESV_STR-BOR_OBJECT sy-vline 
WA_BCSS_RESV_STR-OBJKEY sy-vline 
WA_BCSS_RESV_STR-OBJTYPE sy-vline 
WA_BCSS_RESV_STR-LOGSYS sy-vline 
WA_BCSS_RESV_STR-CAM_ADDRES sy-vline 
WA_BCSS_RESV_STR-ADDRNUMBER sy-vline 
WA_BCSS_RESV_STR-PERSNUMBER sy-vline 
WA_BCSS_RESV_STR-COMMTYPE sy-vline 
WA_BCSS_RESV_STR-CONSNUMBER sy-vline 
WA_BCSS_RESV_STR-SO_KEY sy-vline 
WA_BCSS_RESV_STR-SPOOL sy-vline 
WA_BCSS_RESV_STR-DEPARTMENT sy-vline 
WA_BCSS_RESV_STR-COVER sy-vline 
WA_BCSS_RESV_STR-COVERTEXT sy-vline 
WA_BCSS_RESV_STR-AUTHORIZTN sy-vline 
WA_BCSS_RESV_STR-DEVICE sy-vline 
WA_BCSS_RESV_STR-SPOOLNAME sy-vline 
WA_BCSS_RESV_STR-SUFFIX1 sy-vline 
WA_BCSS_RESV_STR-SUFFIX2 sy-vline 
WA_BCSS_RESV_STR-PRNTIMMED sy-vline 
WA_BCSS_RESV_STR-DELSPOOL sy-vline 
WA_BCSS_RESV_STR-COPIES sy-vline 
WA_BCSS_RESV_STR-NEWSPOOL sy-vline 
WA_BCSS_RESV_STR-TDGROUP sy-vline 
WA_BCSS_RESV_STR-RECIPIENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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