| From: | Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com> |
|---|---|
| To: | Greg Nancarrow <gregn4422(at)gmail(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, "houzj(dot)fnst(at)fujitsu(dot)com" <houzj(dot)fnst(at)fujitsu(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, "tanghy(dot)fnst(at)fujitsu(dot)com" <tanghy(dot)fnst(at)fujitsu(dot)com>, "osumi(dot)takamichi(at)fujitsu(dot)com" <osumi(dot)takamichi(at)fujitsu(dot)com>, Alexey Lesovsky <lesovsky(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Skipping logical replication transactions on subscriber side |
| Date: | 2021-12-17 09:53:48 |
| Message-ID: | 6c5d98c6-879d-690c-b769-96aa162b93d9@enterprisedb.com |
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| Lists: | pgsql-hackers |
On 13.12.21 04:12, Greg Nancarrow wrote:
> (ii) "Setting -1 means to reset the transaction ID"
>
> Shouldn't it be explained what resetting actually does and when it can
> be, or is needed to be, done? Isn't it automatically reset?
> I notice that negative values (other than -1) seem to be regarded as
> valid - is that right?
> Also, what happens if this option is set multiple times? Does it just
> override and use the latest setting? (other option handling errors out
> with errorConflictingDefElem()).
> e.g. alter subscription sub skip (xid = 721, xid = 722);
Let's not use magic numbers and instead use a syntax that is more
explicit, like SKIP (xid = NONE) or RESET SKIP or something like that.
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