On 14.02.2017 18:35, Thomas Nyberg wrote:
Here both 'hello' and 'hello world' are ranked equally highly when
searching with 'hello'. What I'm wondering is, is there a way within
postgres to have it match higher to just 'hello' than 'hello world'?
I.e. something like it slightly down-weights extraneous terms? Of course
in general I don't know the query or the field strings ahead of time.
Thanks for any help!
Cheers,
Thomas
Hello,
try the query:
SELECT s, ts_rank(vector, query) AS rank
FROM t, to_tsvector(s) vector, to_tsquery('hello') query
WHERE query @@ vector;
s | rank
-------------+-----------
hello | 0.0607927
hello world | 0.0303964
(2 rows)
And read about **normalization** in [1]
https://www.postgresql.org/docs/current/static/textsearch-controls.html
--
Artur Zakirov
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company
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