Horton

Re: Fix logical decoding not track transaction duringSNAPBUILD_BUILDING_SNAPSHOT

cca5507 <cca5507@qq.com>

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From: cca5507 <cca5507@qq.com>
To: ocean_li_996 <ocean_li_996@163.com>, pgsql-hackers@lists.postgresql.org <pgsql-hackers@lists.postgresql.org>
Date: 2025-11-22T10:34:23Z
Lists: pgsql-hackers 
Hi Haiyang,

Thank you for your summary.

One important thing is that we must not skip any call to ReorderBufferXidSetCatalogChanges() (direct or indirect) during fast-forwarding or building snapshot, because the historic snapshot only tracks txns with catalog changes, the v6-0004 seems to skip it in xact_decode().

Here is a related bug:

https://www.postgresql.org/message-id/flat/tencent_3A071B760AA1A38540B57F297332B7781C08%40qq.com

--
Regards,
ChangAo Chen