Re: like/ilike improvements

On 9/19/07, Andrew Dunstan <andrew(at)dunslane(dot)net> wrote:
> Can you run the same set of tests in a single byte encoding like latin1?

Here are the results (each query was executed several times before this result):

** 8.1 **
cityvox_latin1=# SELECT e.numeve FROM evenement e WHERE e.libgeseve
ILIKE '%hocus pocus%';
numeve
-----------
900024298
87578
(2 rows)

Time: 135.877 ms

** 8.2 **

cityvox_latin1=# SELECT e.numeve FROM evenement e WHERE e.libgeseve
ILIKE '%hocus pocus%';
numeve
-----------
900024298
87578
(2 rows)

Time: 111.595 ms

** 8.3 **

cityvox_latin1=# SELECT e.numeve FROM evenement e WHERE e.libgeseve
ILIKE '%hocus pocus%';
numeve
-----------
900024298
87578
(2 rows)

Time: 160.582 ms

Results are quite surprising but there's no error, I checked them
several times...

If someone can point me to how I can profile query execution, I can
provide more information.

--
Guillaume