Re: Support logical replication of DDLs

From: Zheng Li <zhengli10(at)gmail(dot)com>
To: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
Cc: vignesh C <vignesh21(at)gmail(dot)com>, Ajin Cherian <itsajin(at)gmail(dot)com>, "houzj(dot)fnst(at)fujitsu(dot)com" <houzj(dot)fnst(at)fujitsu(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, Japin Li <japinli(at)hotmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, rajesh singarapu <rajesh(dot)rs0541(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Support logical replication of DDLs
Date: 2022-10-06 21:30:09
Message-ID: CAAD30UJh+LcUND+zg_A5dbQ_Bi=m_n7qUfKrOwAx2v4jBKWvKQ@mail.gmail.com
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> > Some tweaking is made in deparse_drop_command in order to make DROP
> > TRANSFORM deparsing work. This is because the objidentity captured in
> > currentEventTriggerState->SQLDropList contains the keyword 'on', for
> > example "for typename on language lang", but the keyword 'on' is not
> > needed in the current DROP TRANSFORM syntax. So we need to remove the
> > 'on' keyword in objidentity. I'm not sure if this is the best way to
> > handle it, maybe we can consider directly modifying what's captured in
> > currentEventTriggerState->SQLDropList
> > so we don't have the "on" keyword to begin with?
>
> The exact output format for identity is not set in stone; we should only
> set it in stone once we have an actual working case for them. This is
> the first such use, so it seems OK to make minor modifications (such as
> removing an undesirable ON) if it's a reasonable change and allows
> consumer code to be more easily written.

> So, +1 to dropping ON here. However, if there are further strings that
> need to be modified, let's see what they are.

Thanks for confirming. Attaching the new patch set that removes the
undesirable ON from getObjectIdentityParts() for TRANSFORM.

Regards,
Zheng

Attachment Content-Type Size
v25-0002-Support-DDL-replication.patch application/octet-stream 129.4 KB
v25-0004-Test-cases-for-DDL-replication.patch application/octet-stream 24.6 KB
v25-0005-Add-DDL-deparser-support-for-TEXT-SEARCH-commands-wh.patch application/octet-stream 18.4 KB
v25-0003-Support-CREATE-TABLE-AS-SELECT-INTO.patch application/octet-stream 15.0 KB
v25-0001-Functions-to-deparse-DDL-commands.patch application/octet-stream 257.0 KB
v25-0006-Support-CREATE-TRANSFORM-and-DROP-TRANSFORM-commands.patch application/octet-stream 9.8 KB

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