query multiple schemas

On Sunday, April 21, 2024, Norbert Sándor <sandor(dot)norbert(at)erinors(dot)com>
wrote:
>
>
> The structure of each schema is identical, the tenant ID is the name of
> the schema.
>
You’ve hit the main reason why the scheme you choose is usually avoided.
Better to just add tenant_id to your tables in the first place. And use
partitioned tables if you desire physical separation.

> The above solution seems to work, my questions are:
>
> 1. Is there a better way to achieve the same functionality? Maybe
> without using JSON as an intermediate representation?
>
>
In-database, I doubt it (though I didn’t study your specific solution in
depth). Json provides the easiest way to generate the virtual tables you
need.

Otherwise maybe try something with say bash scripting and psql scripts; or
some other client-side setup where you separate the query and the metadata
lookups so the queries just return normal results and the client takes them
are merges them.

David J.