On Thu, Jun 27, 2024 at 8:49 AM Marthin Laubscher <postg...@lobeshare.co.za> wrote:
> > I suppose when a cast is involved it goes via the external format as well, > right? > A cast between two types is going to accept a concrete instance of the input type, in memory, as its argument and then produces a concrete instance of the output type, in memory, as output. If the input data is serialized the constructor for the input type will handle deserialization. See: create cast https://www.postgresql.org/docs/current/sql-createcast.html In particular the phrasing: identical to or binary-coercible to David J.
