Re: Improving the timing of a query

On Fri, Dec 07, 2007 at 12:07:52PM -0500, mgainty(at)hotmail(dot)com wrote:
> other DB's do FTS when there is a function involved in the predicate (WHERE
> clause)
> so a possible workaround would be to look at all function calls in your
> predicate (WHERE clause) and
> populate a new column with the results of the function(column)
> and then create and populate an index which will reference the
> function(column)

You don't need to create a column, yu can create functional indexes in
postgres:

CREATE INDEX foo ON bar ((myfunction(column)));

And it can be used anytime your query says: WHERE myfunction(column) = X

Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> Those who make peaceful revolution impossible will make violent revolution inevitable.
> -- John F Kennedy