Re: Comparing tsearch2 vectors.

O kyrios Rajesh Kumar Mallah egrapse stis Jul 12, 2004 :

>
> Hi,
>
> We want to compare strings after stemming. Can anyone
> tell me what is the best method. I was thinking to compare
> the tsvector ,but there is no operator for that.

I'd tokenize each string and then apply lexize() to get the
equivalent stemified
word, but what exactly are you trying to accomplish?

>
> Regds
> Mallah.
>
>
>
> tradein_clients=# SELECT to_tsvector('handicraft exporters');
> +---------------------------+
> | to_tsvector |
> +---------------------------+
> | 'export':2 'handicraft':1 |
> +---------------------------+
> (1 row)
>
> Time: 710.315 ms
> tradein_clients=#
> tradein_clients=# SELECT to_tsvector('handicrafts exporter');
> +---------------------------+
> | to_tsvector |
> +---------------------------+
> | 'export':2 'handicraft':1 |
> +---------------------------+
> (1 row)
>
> Time: 400.679 ms
> tradein_clients=# SELECT to_tsvector('Hi there') = to_tsvector('Hi there');
> ERROR: operator does not exist: tsvector = tsvector
> HINT: No operator matches the given name and argument type(s). You may
> need to add explicit type casts.
> tradein_clients=#
>
>

--
-Achilleus