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Date: Thu, 27 Oct 2022 21:37:04 +0800
From: Zhang Mingli <zmlpostgres@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-hackers@lists.postgresql.org
Message-ID: <d3b254ff-adc1-4264-a9f3-c40be30d53eb@Spark>
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 <2faecd55-6786-471c-84ac-36aa7149abee@Spark>
 <644164.1666877342@sss.pgh.pa.us>
Subject: Re: Reducing duplicativeness of EquivalenceClass-derived
 clauses
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Hi,

On Oct 27, 2022, 21:29 +0800, Tom Lane <tgl@sss.pgh.pa.us>, wrote:
> Zhang Mingli <zmlpostgres@gmail.com> writes:
> > How about combine ec->ec_sources and ec->derives as one list for less codes?
>
> Keeping them separate is required for the broken-EC code paths.
> Even if it weren't, I wouldn't merge them just to save a couple
> of lines of code --- I think it's useful to be able to tell which
> clauses the EC started from.
>
> regards, tom lane
Got it, thanks.

Regards,
Zhang Mingli

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<div dir=3D=22auto=22>Hi,<br />
<br />
On Oct 27, 2022, 21:29 +0800, Tom Lane &lt;tgl=40sss.pgh.pa.us&gt;, wrote=
:</div>
<blockquote style=3D=22border-left-color: rgb(26, 188, 156); margin: 5px;=
 padding-left: 10px; border-left-width: thin; border-left-style: solid;=22=
>Zhang Mingli &lt;zmlpostgres=40gmail.com&gt; writes:<br />
<blockquote style=3D=22border-left-color: rgb(230, 126, 34); margin: 5px;=
 padding-left: 10px; border-left-width: thin; border-left-style: solid;=22=
>How about combine ec-&gt;ec=5Fsources and ec-&gt;derives as one list for=
 less codes=3F</blockquote>
<br />
Keeping them separate is required for the broken-EC code paths.<br />
Even if it weren't, I wouldn't merge them just to save a couple<br />
of lines of code --- I think it's useful to be able to tell which<br />
clauses the EC started from.<br />
<br />
regards, tom lane</blockquote>
<div dir=3D=22auto=22>Got it, thanks.</div>
</div>
<div name=3D=22messageSignatureSection=22><br />
<div dir=3D=22auto=22><span style=3D=22color: var(--textColor); backgroun=
d-color: var(--backgroundColor);=22>Regards,</span><br /></div>
<div dir=3D=22auto=22>Zhang Mingli</div>
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