2011/5/10 Mark <Marek.Balgar@seznam.cz>:
> Thanks for quick reply,
> but I want to know, which of these method is called in concrete situation. I
> suppose, that ts_rank call only one of these functions(ts_rank_wttf ,
> ts_rank_wtt , ts_rank_ttf ,ts_rank_tt ). Is it possible?
Yes, same table:
select proname,prosrc,prorettype,proargtypes from pg_proc where
proname = 'ts_rank';
proname | prosrc | prorettype | proargtypes
---------+--------------+------------+-------------------
ts_rank | ts_rank_wttf | 700 | 1021 3614 3615 23
ts_rank | ts_rank_wtt | 700 | 1021 3614 3615
ts_rank | ts_rank_ttf | 700 | 3614 3615 23
ts_rank | ts_rank_tt | 700 | 3614 3615
select oid,typname from pg_type where oid in ('1021','3614','3615','23','700');
oid | typname
------+----------
23 | int4
700 | float4
1021 | _float4
3614 | tsvector
3615 | tsquery
so you can find what go with what for the ts_rank function :
ts_rank([ weights float4[], ] vector tsvector,
query tsquery [, normalization integer ]) returns float4
> Thanks for reply
> Mark
>
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Cédric Villemain 2ndQuadrant
http://2ndQuadrant.fr/ PostgreSQL : Expertise, Formation et Support
