Querying constraints?

From: Lexington Luthor <Lexington(dot)Luthor(at)gmail(dot)com>
To: pgsql-sql(at)postgresql(dot)org
Subject: Querying constraints?
Date: 2006-08-07 15:38:37
Message-ID: eb7mq1$htu$1@sea.gmane.org
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Hi,

Is is possible to query from my application whether there is a primary
key or unique constraint on a given table and field name(s)?

Thanks
LL

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