From: Peter Eisentraut <peter_e@gmx.net>
To: David B <postgresql@thegatelys.com>
To: pgsql-sql@postgresql.org
Subject: Re: Faster performance when using where cust_id = '123' vs cust_id = 123. Does 7.4 fix this??
Date: Tue, 9 Dec 2003 22:45:46 +0100
Message-ID: <200312092245.46122.peter_e@gmx.net> (raw)
In-Reply-To: <GOEGKICPFOPNLIEIHGFJGEJMCEAA.postgresql@thegatelys.com>
References: <GOEGKICPFOPNLIEIHGFJGEJMCEAA.postgresql@thegatelys.com>
David B wrote:
> We have got used to the problem that queries of the format:
>
> select *
> from customer
> where cust_id = '123' are much much faster than
>
> select *
> from customer
> where cust_id = 123
>
> (where cust_id is defined as bigint).
>
> a. Why is this.
Because in the second case, the 123 gets resolved too early to type
integer, which is not index compatible with type bigint.
> b. Will moving to v7.4 change this so we can avoid the whole '123'
> casting thing.
No, but 7.5 will be able to handle it.
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To: pgsql-sql@postgresql.org
Cc: peter_e@gmx.net, postgresql@thegatelys.com
Subject: Re: Faster performance when using where cust_id = '123' vs cust_id = 123. Does 7.4 fix this??
In-Reply-To: <200312092245.46122.peter_e@gmx.net>
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