Context Indexes and ignoring characters

Question

So, we're trying to get a text index to ignore apostrophe's.
insert into table values ('Arby''s');We want the above entry to be located with either of the following queries:
select *
from table
where contains(field, 'Arbys')>0and also
select *
from table
where contains(field, 'Arby''s')>0The second SQL works already, it's the former search that is finding no records. I tried adding an apostrophe to the STOPLIST, but it didn't seem to make a difference. Is there another tweak I can make, so that this works? Or am I going to need to create 2 columns, one without special characters which actually has the context index on it?
Thanks,
--=Chuck

Answer 1

So this is what I've setup:
SQL> begin
  2 
  3   
  4 
  5    CTX_DDL.CREATE_STOPLIST(stoplist_name => 'TEST_APOSTROPHE',
  6                            stoplist_type => 'BASIC_STOPLIST');
  7 
  8    CTX_DDL.ADD_STOPWORD(stoplist_name => 'TEST_APOSTROPHE',
  9                         stopword      => ''''); 
10                    
11 
12  end;
13  /
PL/SQL procedure successfully completed.
SQL> create table test_apos (name varchar2(100));
Table created.
SQL> CREATE INDEX TEST_APOS_NAME_CTX ON TEST_APOS
  2  (NAME)
  3  INDEXTYPE IS CTXSYS.CONTEXT
  4  PARAMETERS('STOPLIST TEST_APOSTROPHE SYNC(ON COMMIT)');
Index created.
SQL> insert into test_apos values ('Arby''s');
1 row created.
SQL> commit;
Commit complete.The following usages of CONTAINS( ) will find the record, but, they either explicitly mention the apostrophe, or, they look for the string prior to the apostrophe. I expect all of these to work regardless of the STOPLIST entry:
SQL> select * from test_apos where contains (name, 'Arby') > 0;
NAME
Arby's
SQL>  select * from test_apos where contains (name, 'Arby%') > 0;
NAME
Arby's
SQL> select * from test_apos where contains (name, 'Arby''s') > 0;
NAME
Arby's
SQL> select * from test_apos where contains (name, '$(Arby)') > 0;
NAME
Arby'sNone of the following work (incl your suggestion, which I greatly appreciate, btw):
SQL> select * from test_apos where contains (name, 'Arbys') > 0;
no rows selected
SQL> select * from test_apos where contains (name, 'Arby%s') > 0;
no rows selected
SQL> select * from test_apos where contains (name, 'Arbys%') > 0;
no rows selected
SQL> select * from test_apos where contains (name, '$(Arbys)') > 0;
no rows selected--=cf