Re: Column Filtering in Logical Replication

One thing I just happened to notice is this part of your commit message

: REPLICA IDENTITY columns are always replicated
: irrespective of column names specification.

... for which you don't have any tests -- I mean, create a table with a
certain REPLICA IDENTITY and later try to publish a set of columns that
doesn't include all the columns in the replica identity, then verify
that those columns are indeed published.

Having said that, I'm not sure I agree with this design decision; what I
think this is doing is hiding from the user the fact that they are
publishing columns that they don't want to publish. I think as a user I
would rather get an error in that case:

ERROR: invalid column list in published set
DETAIL: The set of published commands does not include all the replica identity columns.

or something like that. Avoid possible nasty surprises of security-
leaking nature.

--
Álvaro Herrera 39°49'30"S 73°17'W — https://www.EnterpriseDB.com/
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