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From: stig erikson <[email protected]>
To: [email protected]
Subject: type casting reference?
Date: Sun, 12 Jun 2005 21:39:28 +0200
Message-ID: <[email protected]> (raw)

hi.
i need to cast from timestamp to seconds (in the form of integer).

i have a table with a column:
expiretime timestamp

i have tried the following, it gives errors as below:
SELECT expiretime::float4 AS timeleft FROM table WHERE something='1234';
ERROR:  cannot cast type timestamp without time zone to real

SELECT expiretime::text::float4 AS timeleft FROM table WHERE something='1234';
ERROR:  invalid input syntax for type real: "2005-06-12 21:21:24.368082"


postgresql 7.4.1 (i know, old)

so, my question is simply, where in the docs can i find how i should perform the 
cast?
it would help a lot if there was a table showing which types can be cased into 
which, and possibly an example or two for situations like this, casting from 
timestamp (to timestamp worked right away).

/stig

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