Re: Fast COPY FROM based on batch insert

On 8/7/2022 05:12, Ian Barwick wrote:
>      ERROR:  bind message supplies 0 parameters, but prepared statement 
> "pgsql_fdw_prep_178" requires 6
>      CONTEXT:  remote SQL command: INSERT INTO public.foo_part_1(t, v1, 
> v2, v3, v4, v5) VALUES ($1, $2, $3, $4, $5, $6)
>      COPY foo, line 88160
Thanks, I got it. MultiInsertBuffer are created on the first non-zero 
flush of tuples into the partition and isn't deleted from the buffers 
list until the end of COPY. And on a subsequent flush in the case of 
empty buffer we catch the error.
Your fix is correct, but I want to propose slightly different change 
(see in attachment).

-- 
regards,
Andrey Lepikhov
Postgres Professional