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From: David G. Johnston <[email protected]>
To: yudhi s <[email protected]>
Cc: pgsql-general <[email protected]>
Subject: Re: Insert works but fails for merge
Date: Fri, 9 Aug 2024 14:24:46 -0700
Message-ID: <CAKFQuwY3itH6rZ8xxjyZOgm6wbNCB2Rt+z24vpb4dZYD_9YypQ@mail.gmail.com> (raw)
In-Reply-To: <CAEzWdqc=QKpfFU3jNSoBrZ37y727GK2w2rSQ2qJCEGJDT5Pm6Q@mail.gmail.com>
References: <CAEzWdqc=QKpfFU3jNSoBrZ37y727GK2w2rSQ2qJCEGJDT5Pm6Q@mail.gmail.com>

On Fri, Aug 9, 2024 at 2:14 PM yudhi s <[email protected]> wrote:

>
> Why so?
>

Because you stuck a CTE in between the column list of the insert - where
types are known - and the values command - where types are unknown since
you didn't specify them.  As the row comes out of the CTE every column must
have a known type, and so in the absence of context they get typed as text.

David J.


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