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From: Alvaro Herrera <[email protected]>
To: Jonathan S. Katz <[email protected]>
Cc: [email protected] <[email protected]>
Cc: Amit Kapila <[email protected]>
Cc: Ajin Cherian <[email protected]>
Cc: Peter Smith <[email protected]>
Cc: vignesh C <[email protected]>
Cc: Zheng Li <[email protected]>
Cc: li jie <[email protected]>
Cc: Dilip Kumar <[email protected]>
Cc: Masahiko Sawada <[email protected]>
Cc: Japin Li <[email protected]>
Cc: rajesh singarapu <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Support logical replication of DDLs
Date: Thu, 16 Feb 2023 20:38:27 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 2023-Feb-16, Jonathan S. Katz wrote:

> On 2/16/23 12:53 PM, Alvaro Herrera wrote:

> > I don't think this is the fault of logical replication.  Consider that
> > for the backend server, the function source code is just an opaque
> > string that is given to the plpgsql engine to interpret.  So there's no
> > way for the logical DDL replication engine to turn this into runnable
> > code if the table name is not qualified.
> 
> Sure, that's fair. That said, the example above would fall under a "typical
> use case", i.e. I'm replicating functions that call tables without schema
> qualification. This is pretty common, and as logical replication becomes
> used for more types of workloads (e.g. high availability), we'll definitely
> see this.

Hmm, I think you're saying that replay should turn check_function_bodies
off, and I think I agree with that.

-- 
Álvaro Herrera               48°01'N 7°57'E  —  https://www.EnterpriseDB.com/
"El hombre nunca sabe de lo que es capaz hasta que lo intenta" (C. Dickens)

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