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From: Tom Lane <[email protected]>
To: Vallimaharajan G <[email protected]>
Cc: pgsql-hackers <[email protected]>
Subject: Re: Query Regarding frame options initialization in Window aggregate state
Date: Wed, 27 Mar 2024 12:56:48 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

Vallimaharajan G <[email protected]> writes:
> I am currently referring to the Postgres source code (psql (PostgreSQL) 14.3) and came across a particular section related to window aggregate initialization that has left me with a question. Specifically, I noticed a conditional case in the initialization of per aggregate (initialize_peraggregate in nodeWindowAgg.c) where the winstate frameOptions is being checked, but it appears that frameOptions is not set before this conditional case.

You are right, and that's a bug.  It's not of major consequence ---
it would just cause us to set up for moving-aggregate mode when
we won't ever actually move the frame head -- but it's at least a
little bit inefficient.

While I'm looking at it, there's a pretty obvious typo in the
adjacent comment:

- * and collect the right set of fields from the pg_attribute entry.
+ * and collect the right set of fields from the pg_aggregate entry.

			regards, tom lane

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