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amitlan avatar amitlan commented on August 15, 2024

I think "function is not unique" seems like a bug that can be fixed.

Even after fixing that, you still cannot use generate_series(int, int) as input. pg_bulkload expects the function to return SET OF "table records". So, if you have the following table:

CREATE TABLE foo (a int);

and you want to insert numbers 1..1000 into it, you will have to write a wrapper function around generate_series(integer, integer) so that pg_bulkload's above-mentioned requirement is satisfied:

CREATE_FUNCTION foo_loader(int, int) RETURNS SETOF foo AS
  AS $$ SELECT generate_series($1, $2); $$
  LANGUAGE SQL;

from pg_bulkload.

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