Hi hackers, While reviewing another thread that proposes to include "generated columns" support for logical replication [1] I was looking for any existing PostgreSQL documentation on this topic.
But, I found almost nothing about it at all -- I only saw one aside mention saying that logical replication low-level message information is not sent for generated columns [2]. ~~ IMO there should be some high-level place in the docs where the behaviour for logical replication w.r.t. generated columns is described. There are lots of candidate places which could talk about this topic. * e.g.1 in "Generated Columns" (section 5.4) * e.g.2 in LR "Column-Lists" docs (section 29.5) * e.g.3 in LR "Restrictions" docs (section 29.7) * e.g.4 in the "CREATE PUBLICATION" reference page For now, I have provided just a simple patch for the "Generated Columns" section [3]. Perhaps it is enough. Thoughts? ====== [1] https://www.postgresql.org/message-id/flat/B80D17B2-2C8E-4C7D-87F2-E5B4BE3C069E%40gmail.com [2] https://www.postgresql.org/docs/devel/protocol-logicalrep-message-formats.html [3] https://www.postgresql.org/docs/devel/ddl-generated-columns.html Kind Regards, Peter Smith. Fujitsu Australia
v1-0001-generated-columns-are-skipped-for-logical-replica.patch
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