From: | Darren Duncan <darren(at)darrenduncan(dot)net> |
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To: | Jaime Casanova <jaime(at)2ndquadrant(dot)com> |
Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: relation complex types |
Date: | 2012-06-02 19:55:00 |
Message-ID: | 4FCA6F94.20300@darrenduncan.net |
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Lists: | pgsql-hackers |
Jaime Casanova wrote:
> I knew that we create an entry in pg_type for every table we create,
> what i didn't know is that we actually create 2 entries.
>
> for example CREATE TABLE foo (i int); will create types foo and _foo.
> so, any reason to create 2 entries?
I don't know offhand; maybe its the corresponding row/tuple type and
table/relation type?
> anyway, what really kept my attention is that CREATE SEQUENCE also
> create an entry in pg_type. there is any reason for that?
This I'm fairly sure, is due to a sequence generator being implemented as a
table/relation-typed variable, so it has a corresponding type like the regular
table/relation-typed variables in the database.
-- Darren Duncan
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