Re: pgsql do not handle NULL constants in the view - Mailing list pgsql-performance

Thx it helps.

Shame on me %) I forgot that NULL itself has no type, and thought that each constant in the view are casted to the
resultingtype at the creation time. 

-----Original Message-----
From: Tom Lane [mailto:tgl@sss.pgh.pa.us]
Sent: Wednesday, August 20, 2008 4:54 PM
To: Sergey Hripchenko
Cc: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] pgsql do not handle NULL constants in the view

Sergey Hripchenko <shripchenko@intermedia.net> writes:
> CREATE OR REPLACE VIEW bar AS
> SELECT *
> FROM (
>     (
>         SELECT calldate, duration, billsec, get_asterisk_cdr_caller_id(accountcode) AS caller_id
>         FROM asterisk_cdr
>     ) UNION ALL (
>         SELECT start_time, get_interval_seconds(completed_time-start_time),
get_interval_seconds(answered_time-start_time),NULL 
>         FROM asterisk_huntgroups_calls
>     )
> ) AS foo;

Try casting the NULL to integer (or whatever the datatype of the other
union arm is) explicitly.

                        regards, tom lane

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