Re: Proposal to CREATE FOREIGN TABLE LIKE

Zhang Mingli
www.hashdata.xyz
On Feb 1, 2025 at 20:20 +0800, Álvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, wrote:
>
> Sure. Did you consider IMPORT FOREIGN SCHEMA?
Hi, Álvaro

Thank you very much for your suggestion.

I've looked into it, and it certainly can be beneficial, especially for postgres_fdw.
However, I believe that not all FDWs support the concept of a schema or can be used with the IMPORT FOREIGN SCHEMA command, is it?

For example, we use kafka_fdw to produce and consume data from a Kafka server.
In our scenario, we sometimes need to write records from a local table into Kafka. Here’s a brief outline of our process:

1. We already have a wide table, local_wide_table in Postgres.
2. We need to create a foreign table, foreign_table, with the same definition as local_wide_table.
3. Insert records into foreign_table by selecting from local_wide_table with the some quals.

In step 2, we currently have to manually create the foreign table using CREATE FOREIGN TABLE and copy the column definitions one by one.