Clojurians Log v2

This latter solution works without a problem using a PostgreSQL database

try (map #(select-keys % (keys %))) instead of identity there

That is indeed working

next.jdbc instead of returning realized maps returns these sort of proxy maps that inside the reducing context of plan act like a map, but out side of that don't, the select-keys things transforms them into real maps before leaving the reducing context of plan

Thank you for the explanation!

Do you know why that is different comparing to PostgreSQL?

I do not

could be something different in the postgres jdbc driver in how and where result sets are valid

Anyways, thank you!

I'm actually surprised it works with PG -- I would not have expected it to work with any database -- and I'll also note that there's no point in using plan here if you're just going to reduce whole rows into a vector (with into []). plan is intended specifically for eagerly consuming a result set without turning it into a whole bunch of Clojure data structures, in particular, so that you can process result sets that are very large without overflowing memory (streaming from the database). But there are a lot of situations where you can consume result sets via reduce-over-`plan` rather than calling execute! and then processing an entire vector of hash maps.

That was just a simple example for demonstrating the issue