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STOPCLASS and MULTI_STOPLIST Not working

user13311755Apr 10 2019 — edited Apr 22 2019

Oracle 12.1c  Enterprise.  Context index

Using Multi_lexer, with Multi_stoplist

                  

exec ctx_ddl.create_stoplist('MultiStop','MULTI_STOPLIST');
exec ctx_ddl.add_stopclass  ('MultiStop', 'longwords', '[[:alnum:]]{20,}')

Index a document with base64 encoded text attachments,

select length(token_text) len, i.* from table$I i

order by 1 desc

I get records with length 64 which apparently is the default max.  Should be 20 if it worked.

Question:  Does stopclasses using regex even work with multi_lexer/multi_stoplist?

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Added on Apr 10 2019
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