Re: Faster performance when using where cust_id = '123' vs cust_id = 123. Does 7.4 fix this??

From: Peter Eisentraut <peter_e(at)gmx(dot)net>
To: "David B" <postgresql(at)thegatelys(dot)com>, <pgsql-sql(at)postgresql(dot)org>
Subject: Re: Faster performance when using where cust_id = '123' vs cust_id = 123. Does 7.4 fix this??
Date: 2003-12-09 21:45:46
Message-ID: 200312092245.46122.peter_e@gmx.net
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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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