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From: Tom Lane <[email protected]>
To: Amit Langote <[email protected]>
Cc: Nathan Bossart <[email protected]>
Cc: Aleksander Alekseev <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: The documentation for READ COMMITTED may be incomplete or wrong
Date: Fri, 19 May 2023 14:33:36 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CA+HiwqFKUruFL8=njk1WkDCNo3PrxWuL9o9DQ_BJitBw0Dpr3Q@mail.gmail.com>
References: <CAJ7c6TMBTN3rcz4=AjYhLPD_w3FFT0Wq_C15jxCDn8U4tZnH1g@mail.gmail.com>
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	<20230518195123.GA3362715@nathanxps13>
	<[email protected]>
	<20230518213442.GA3364784@nathanxps13>
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	<CA+HiwqFKUruFL8=njk1WkDCNo3PrxWuL9o9DQ_BJitBw0Dpr3Q@mail.gmail.com>

Amit Langote <[email protected]> writes:
> On Fri, May 19, 2023 at 8:57 AM Tom Lane <[email protected]> wrote:
>> What I'm thinking about doing to back-patch this is to replace
>> one of the pointer fields in EPQState with a pointer to a
>> subsidiary palloc'd structure, where we can put the new fields
>> along with the cannibalized old one.  We've done something
>> similar before, and it seems a lot safer than having basically
>> different logic in v16 than earlier branches.

> +1.

Done that way.  I chose to replace the tuple_table field, because
it was in a convenient spot and it seemed like the field least
likely to have any outside code referencing it.

			regards, tom lane

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