Andres Freund <and...@anarazel.de> writes:

> I don't think that's right. For one there's plenty types of DDL where no
> such locking exists, consider e.g. composite datums where additional
> columns can be added even after such a type is already used by another
> table.

Oh, indeed. Never mind the last paragraph.

--
Arseny Sher
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company

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