| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Peter Eisentraut <peter(at)eisentraut(dot)org> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Joe Conway <mail(at)joeconway(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, pgsql-hackers(at)lists(dot)postgresql(dot)org, Robert Haas <robertmhaas(at)gmail(dot)com> |
| Subject: | Re: Making type Datum be 8 bytes everywhere |
| Date: | 2025-08-12 14:11:15 |
| Message-ID: | juc3q6sqti2tibq52va4nayzccwutwfcrpyrociiy3qecpeqnm@qvtxgrajjrkj |
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| Lists: | pgsql-hackers |
Hi,
On 2025-08-12 08:30:43 +0200, Peter Eisentraut wrote:
> I'm also thinking, as a follow-on project, we could get rid of typbyval and
> require that typbyval == (typlen > 0 && typlen <= 8). Something to think
> about.
We currently have types that aren't typbyval despite fitting those criteria:
postgres[1606972][1]=# SELECT oid::regtype, typlen FROM pg_type WHERE typlen > 0 and typlen <= 8 and not typbyval;
┌──────────┬────────┐
│ oid │ typlen │
├──────────┼────────┤
│ tid │ 6 │
│ macaddr │ 6 │
│ macaddr8 │ 8 │
└──────────┴────────┘
(3 rows)
Greetings,
Andres Freund
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