ABAP Select data from SAP table LSPREBOOKING into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LSPREBOOKING
*  INTO TABLE @DATA(IT_LSPREBOOKING2).
*--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_LSPREBOOKING INDEX 1 INTO DATA(WA_LSPREBOOKING2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LSPREBOOKING>-PLVAR = 1.
<LSPREBOOKING>-PATYP = 1.
<LSPREBOOKING>-PARID = 1.
<LSPREBOOKING>-EMPTY = 1.
<LSPREBOOKING>-EMPID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LSPREBOOKING-EMPSH, sy-vline,
  WA_LSPREBOOKING-EMPTX, sy-vline,
  WA_LSPREBOOKING-TRTTY, sy-vline,
  WA_LSPREBOOKING-TTYID, sy-vline,
  WA_LSPREBOOKING-TTSHT, sy-vline,
  WA_LSPREBOOKING-TTSTX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LSPREBOOKING 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_LSPREBOOKING 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_LSPREBOOKING INTO WA_LSPREBOOKING.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LSPREBOOKING-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LSPREBOOKING-LANGU.
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_LSPREBOOKING_STR, 
PLVAR TYPE STRING,
PATYP TYPE STRING,
PARID TYPE STRING,
EMPTY TYPE STRING,
EMPID TYPE STRING,
EMPSH TYPE STRING,
EMPTX TYPE STRING,
TRTTY TYPE STRING,
TTYID TYPE STRING,
TTSHT TYPE STRING,
TTSTX TYPE STRING,
TTBEG TYPE STRING,
TTEND TYPE STRING,
TFORM TYPE STRING,
ISTAT TYPE STRING,
LANGU TYPE STRING,
PRIOX TYPE STRING,
BUDAT TYPE STRING,
VOBEG TYPE STRING,
VOEND TYPE STRING,
MANZL TYPE STRING,
KKOST TYPE STRING,
KWAER TYPE STRING,
LOCID TYPE STRING,
LCSHT TYPE STRING,
LCSTX TYPE STRING,
CE_PERNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LSPREBOOKING_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_LSPREBOOKING_STR-PLVAR sy-vline 
WA_LSPREBOOKING_STR-PATYP sy-vline 
WA_LSPREBOOKING_STR-PARID sy-vline 
WA_LSPREBOOKING_STR-EMPTY sy-vline 
WA_LSPREBOOKING_STR-EMPID sy-vline 
WA_LSPREBOOKING_STR-EMPSH sy-vline 
WA_LSPREBOOKING_STR-EMPTX sy-vline 
WA_LSPREBOOKING_STR-TRTTY sy-vline 
WA_LSPREBOOKING_STR-TTYID sy-vline 
WA_LSPREBOOKING_STR-TTSHT sy-vline 
WA_LSPREBOOKING_STR-TTSTX sy-vline 
WA_LSPREBOOKING_STR-TTBEG sy-vline 
WA_LSPREBOOKING_STR-TTEND sy-vline 
WA_LSPREBOOKING_STR-TFORM sy-vline 
WA_LSPREBOOKING_STR-ISTAT sy-vline 
WA_LSPREBOOKING_STR-LANGU sy-vline 
WA_LSPREBOOKING_STR-PRIOX sy-vline 
WA_LSPREBOOKING_STR-BUDAT sy-vline 
WA_LSPREBOOKING_STR-VOBEG sy-vline 
WA_LSPREBOOKING_STR-VOEND sy-vline 
WA_LSPREBOOKING_STR-MANZL sy-vline 
WA_LSPREBOOKING_STR-KKOST sy-vline 
WA_LSPREBOOKING_STR-KWAER sy-vline 
WA_LSPREBOOKING_STR-LOCID sy-vline 
WA_LSPREBOOKING_STR-LCSHT sy-vline 
WA_LSPREBOOKING_STR-LCSTX sy-vline 
WA_LSPREBOOKING_STR-CE_PERNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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