Oracle Text, ctxsys.context problem with number column

Question

Hi,
DB 11.2.0.3
Is there any solution to create ctxsys.context index on number column ? Or I have to create other index type ?
When I try do that (create ctxsys.context index), I get
09:01:18  ORA-29855: wystąpił błąd przy wykonywaniu podprogramu ODCIINDEXCREATE  (An error has occurred in the performance of the subprogram)
09:01:18  ORA-20000: Oracle Text - błąd: (- error:)
09:01:18  DRG-10509: niepoprawna kolumna tekstowa: ITEM_TYPE (invalid text column:)
09:01:18  ORA-06512: przy "CTXSYS.DRUE", linia 160
09:01:18  ORA-06512: przy "CTXSYS.TEXTINDEXMETHODS", linia 366Btw, is there possible to search like "*LIKE %123%*" clause any of index (in contains) ?
Edited by: Ndejo on 2012-11-21 00:53

Answer 1

The multi_column_datastore says that the text to be indexed should be fetched from the supplied COLUMNS list rather than from the actual column the index is created on.
So in this case we're fetching the contents of "theNumber" column, converting it to text, and indexing it.
You don't necessarily need a dummy column, if "a_title" is a varchar column you could create the index on that instead.
For example:
SQL> create table mytab( a_id number, a_code number, a_title varchar2(80), a_subtitle varchar2(80), a_info clob );
Table created.
SQL> insert into mytab values ( 12, 9812376, 'foo is the title',
  2  'foobar is the subtitle', 'the info column will not be indexed' );
1 row created.
SQL> exec ctx_ddl.drop_preference( 'myds' )
PL/SQL procedure successfully completed.
SQL> exec ctx_ddl.create_preference( 'myds', 'MULTI_COLUMN_DATASTORE' )
PL/SQL procedure successfully completed.
SQL> exec ctx_ddl.set_attribute( 'myds', 'COLUMNS', 'a_code, a_title, a_subtitle' )
PL/SQL procedure successfully completed.
SQL> create index myindex on mytab (a_title) indextype is ctxsys.context
  2  parameters ('datastore myds');
Index created.
SQL> select a_id from mytab where contains (a_title, '%123%') > 0;
      A_ID
        12
SQL> select a_id from mytab where contains (a_title, 'foo') > 0;
      A_ID
        12If you want to be able to search within a particular column, then add "section group CTXSYS.AUTO_SECTION_GROUP" to the parameters clause, and you can then do:
SQL> select a_id from mytab where contains (a_title, 'foobar WITHIN a_subtitle') > 0;
      A_ID
        12