On Thu, Feb 9, 2023 at 5:37 PM David G. Johnston <david.g.johnston@xxxxxxxxx> wrote:
On Thu, Feb 9, 2023 at 9:28 AM Alban Hertroys <haramrae@xxxxxxxxx> wrote:> On 9 Feb 2023, at 16:41, Dominique Devienne <ddevienne@xxxxxxxxx> wrote:
> Now we'd like to do the same for composite keys, and I don't know how to do that.
This works:
=> select (1, 'one'::text) in ((1, 'two'::text), (2, 'one'::text), (1, 'one'::text), (2, 'two'::text));But you cannot write the right-side of the IN as a single parameter which seems to be the primary constraint trying to be conformed to.
Right. The goal is to (re)use a prepared statement (i.e. plan once), and bind the RHS (binary) array
and do a single exec (single round-trip) to get the matching rows. AFAIK, this is the fastest way.
If there's a better/faster way, I'm interested. --DD
