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help / color / mirror / Atom feedFrom: Yugo NAGATA <[email protected]>
To: jian he <[email protected]>
Cc: [email protected]
Subject: Re: Incremental View Maintenance, take 2
Date: Mon, 28 Aug 2023 01:12:41 +0900
Message-ID: <[email protected]> (raw)
In-Reply-To: <CACJufxHMG9Pmc=W8QMHvk_RwUBABDZNh9HgO4JSQtp1+JUPTJg@mail.gmail.com>
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On Sun, 2 Jul 2023 08:25:12 +0800
jian he <[email protected]> wrote:
> This is probably not trivial.
> In function apply_new_delta_with_count.
>
> appendStringInfo(&querybuf,
> "WITH updt AS (" /* update a tuple if this exists in the view */
> "UPDATE %s AS mv SET %s = mv.%s OPERATOR(pg_catalog.+) diff.%s "
> "%s " /* SET clauses for aggregates */
> "FROM %s AS diff "
> "WHERE %s " /* tuple matching condition */
> "RETURNING %s" /* returning keys of updated tuples */
> ") INSERT INTO %s (%s)" /* insert a new tuple if this doesn't existw */
> "SELECT %s FROM %s AS diff "
> "WHERE NOT EXISTS (SELECT 1 FROM updt AS mv WHERE %s);",
>
> ---------------------
> ") INSERT INTO %s (%s)" /* insert a new tuple if this doesn't existw */
> "SELECT %s FROM %s AS diff "
>
> the INSERT INTO line, should have one white space in the end?
> also "existw" should be "exists"
Yes, we should need a space although it works. I'll fix as well as the typo.
Thank you.
Regards,
Yugo Nagata
--
Yugo NAGATA <[email protected]>
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