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From: Tom Lane <tgl@sss.pgh.pa.us>
To: pyrotarlu74@gmail.com
cc: pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #18139: Causing FATAL error on database using function last()
 or first()
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References: <18139-9f45531e1ce99975@postgresql.org>
Comments: In-reply-to PG Bug reporting form <noreply@postgresql.org>
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PG Bug reporting form <noreply@postgresql.org> writes:
> If I use the function last/first on this dataset, if the first rows parsed
> by the function contain null values, it cause FATAL error on database.

There is no last() nor first() function built into Postgres.
I surmise that you are using a buggy extension, in which case
you need to report this to the extension's author.

			regards, tom lane