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help / color / mirror / Atom feedFrom: Greg Sabino Mullane <[email protected]>
To: Ertan Küçükoglu <[email protected]>
Cc: [email protected]
Subject: Re: Domains vs data types
Date: Wed, 20 Aug 2025 12:12:25 -0400
Message-ID: <CAKAnmmJfh2hPk8v597tRNVhM9_4oCQmTtJ6CVqHAp4hO0qPj6Q@mail.gmail.com> (raw)
In-Reply-To: <CAH2i4yf_M5NfX_kDu6_2Z+sgqLOZK9vCsF3EfmwZQyYFuAMxpg@mail.gmail.com>
References: <CAH2i4yf_M5NfX_kDu6_2Z+sgqLOZK9vCsF3EfmwZQyYFuAMxpg@mail.gmail.com>
On Wed, Aug 20, 2025 at 12:48 AM Ertan Küçükoglu <[email protected]>
wrote:
> Does the second table have any technical advantage/disadvantage over plain
> data type definition?
> Less metadata in memory? High metadata in memory? Less/increased disk
> space?
>
Same disk space. No disadvantage other than confusing your users, and any
performance differences will be so minor as to be unmeasurable. (my two
cents: domains are best when the data type is complex AND shared across
multiple tables. Even then I tend to avoid them.)
Cheers,
Greg
--
Crunchy Data - https://www.crunchydata.com
Enterprise Postgres Software Products & Tech Support
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Subject: Re: Domains vs data types
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