ABAP Select data from SAP table LSCANCELLATION into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LSCANCELLATION
*  INTO TABLE @DATA(IT_LSCANCELLATION2).
*--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_LSCANCELLATION INDEX 1 INTO DATA(WA_LSCANCELLATION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LSCANCELLATION>-PLVAR = 1.
<LSCANCELLATION>-EVEID = 1.
<LSCANCELLATION>-EVSHT = 1.
<LSCANCELLATION>-EVSTX = 1.
<LSCANCELLATION>-EVBEG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LSCANCELLATION-EVEND, sy-vline,
  WA_LSCANCELLATION-EVLNG, sy-vline,
  WA_LSCANCELLATION-LOCID, sy-vline,
  WA_LSCANCELLATION-LOCTX, sy-vline,
  WA_LSCANCELLATION-ISTAT, sy-vline,
  WA_LSCANCELLATION-EXTRN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LSCANCELLATION 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_LSCANCELLATION 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_LSCANCELLATION INTO WA_LSCANCELLATION.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_LSCANCELLATION_STR, 
PLVAR TYPE STRING,
EVEID TYPE STRING,
EVSHT TYPE STRING,
EVSTX TYPE STRING,
EVBEG TYPE STRING,
EVEND TYPE STRING,
EVLNG TYPE STRING,
LOCID TYPE STRING,
LOCTX TYPE STRING,
ISTAT TYPE STRING,
EXTRN TYPE STRING,
PRIOX TYPE STRING,
MANZL TYPE STRING,
BUDAT TYPE STRING,
SEQNR TYPE STRING,
KKOST TYPE STRING,
KWAER TYPE STRING,
DELET TYPE STRING,
LOCKM TYPE STRING,
HISTO TYPE STRING,
TFORM TYPE STRING,
OTYPE TYPE STRING,
CE_PERNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LSCANCELLATION_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_LSCANCELLATION_STR-PLVAR sy-vline 
WA_LSCANCELLATION_STR-EVEID sy-vline 
WA_LSCANCELLATION_STR-EVSHT sy-vline 
WA_LSCANCELLATION_STR-EVSTX sy-vline 
WA_LSCANCELLATION_STR-EVBEG sy-vline 
WA_LSCANCELLATION_STR-EVEND sy-vline 
WA_LSCANCELLATION_STR-EVLNG sy-vline 
WA_LSCANCELLATION_STR-LOCID sy-vline 
WA_LSCANCELLATION_STR-LOCTX sy-vline 
WA_LSCANCELLATION_STR-ISTAT sy-vline 
WA_LSCANCELLATION_STR-EXTRN sy-vline 
WA_LSCANCELLATION_STR-PRIOX sy-vline 
WA_LSCANCELLATION_STR-MANZL sy-vline 
WA_LSCANCELLATION_STR-BUDAT sy-vline 
WA_LSCANCELLATION_STR-SEQNR sy-vline 
WA_LSCANCELLATION_STR-KKOST sy-vline 
WA_LSCANCELLATION_STR-KWAER sy-vline 
WA_LSCANCELLATION_STR-DELET sy-vline 
WA_LSCANCELLATION_STR-LOCKM sy-vline 
WA_LSCANCELLATION_STR-HISTO sy-vline 
WA_LSCANCELLATION_STR-TFORM sy-vline 
WA_LSCANCELLATION_STR-OTYPE sy-vline 
WA_LSCANCELLATION_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.