Re: creating functional index over multiple columns

CREATE INDEX my_idx ON my_table(lower(name), type_id, syn_id); ???

Chris

----- Original Message ----- 
From: "Chantal Ackermann" <chantal.ackermann@biomax.de>
To: <pgsql-sql@postgresql.org>
Sent: Friday, June 28, 2002 7:13 PM
Subject: [SQL] creating functional index over multiple columns


> hello all,
> 
> I am new to this list, and I hope my request is well placed, here. I 
> tried searching the archives but I wasn't lucky.
> 
> I want to create an index over two columns and one function:
> 
> the WHERE clause is:
> WHERE lower(name)=? AND type_id=? AND syn_id=?
> 
> I know from the docs that I have to create on function that wraps these 
> three values for creating the appropriate index. I have practically no 
> idea how to do this (e.g. what type/set should this function return?).
> 
> Thanks a lot for pointers to documentation/former postings or any help
> Cheers
> Chantal
> 
> 
> 
> 
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