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Re: Detecting renamed columns via pgouput in logical replication ? - Mailing list pgsql-general

From David G. Johnston
Subject Re: Detecting renamed columns via pgouput in logical replication ?
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Msg-id CAKFQuwZwe_Lw0vL=yG4q+sxuEUHoR28WeYbDHC6zKvuwYT=XBQ@mail.gmail.com
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In response to Re: Detecting renamed columns via pgouput in logical replication ?  (Andreas Andreakis <andreas.andreakis@gmail.com>)
Responses Re: Detecting renamed columns via pgouput in logical replication ?
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On Monday, April 27, 2020, Andreas Andreakis <andreas.andreakis@gmail.com> wrote:
Thx for replying David.

According to https://www.postgresql.org/docs/10/protocol-logicalrep-message-formats.html it looks like certain schema information is embedded via pgoutput such as column names and types. However, if a new column name appears and a previous not, then it is currently not possible to differentiate if a column was renamed VS if a new column was added and an old dropped.

Correct.  Maybe you want event triggers?
 

There are additional schema changes that are currently not covered, such as changes in default values. 

Correct
 

Are there plans to add comprehensive schema change detection abilities via logical replication ? either by embedding more information into pgoutput or perhaps by embedding the schema DDLs ?  

You could search the mailing list archives for recent discussions but given the general lack fo response to your email I’d say probably not.  Decent odds if someone was they would have replied to your email.

David J.

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