COPY duckdb_table FROM STDIN

[JelteF]

Right now if you try to copy into a duckdb table (MotherDuck or temporary) you'll get an error. An example of this is the following psql commands (\copy is a psql meta-command that transforms into COPY ... FROM STDIN)

CREATE TEMP TABLE t(a int) USING duckdb;
\copy t FROM 'my_local_data.csv' (FORMAT 'csv', quote '"', header 1, DELIMITER '|');

You then get this error:

ERROR:  0A000: duckdb does not implement duckdb_slot_callbacks

A workaround for this issue is to first do the COPY into a postgres table and then do CREATE TABLE AS.

Related to #30 but different. #30 is about writing the results from a duckdb-only query into a Postgres heap table. While this issue is about writing from Postgres input to a duckdb table.