Date interval - Mailing list pgsql-sql

From Richard Sydney-Smith
Subject Date interval
Date
Msg-id 002901c383ed$a70423a0$8f601ad3@athlon2000
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Responses Re: Date interval
Re: Date interval
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I am looking for a way to convert an interval into a number of days ( integer);
 
In sybase I would use :
 
days(today()-r_expire)
 
where r_expire is the timestamp I am comparing against.
 
How do we do this in postgres?
 
date_trunc(today()-r_expire) does not seem to do it
 
thanks
 
Richard
 

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