Re: WHERE col = ANY($1) extended to 2 or more columns?

On Thu, Feb 9, 2023 at 5:03 PM Dominique Devienne <ddevienne@gmail.com>
wrote:

> On Thu, Feb 9, 2023 at 4:51 PM David G. Johnston <
> david.g.johnston@gmail.com> wrote:
>
>> On Thu, Feb 9, 2023 at 8:41 AM Dominique Devienne <ddevienne@gmail.com>
>> wrote:
>>
>>> Now we'd like to do the same for composite keys, and I don't know how to
>>> do that.
>>>
>>
>> An array-of-composites is simply:
>> SELECT ARRAY[ ROW(1, 'one'), ROW(2, 'two') ]::composite_type[];
>>
>
> Thanks. I don't consider that "simple" myself :). But I'm definitely not
> an advanced PostgreSQL user!
> Would still appreciate a more fleshed out demo, if anyone is kind enough
> to provide it. Thanks, --DD
>

Also, I'm still not sure how to write that WHERE clause, with the $1 being
an array of a composite type.
And since this is a binary bind, what kind of OIDs to use. Your example
seems to generate a type on-the-fly for example David.
Will we need to create custom types just so we have OIDs we can use to
assemble the bytes of the array-of-composite bind?
I believe there's an implicit ROW type per table created. Are there also
implicit types for composite PKs and/or UNIQUE constraints?
Lots of questions...