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CREATE EXTENSION test_copy_callbacks;
CREATE TABLE public.test (a INT, b INT, c INT);
INSERT INTO public.test VALUES (1, 2, 3), (12, 34, 56), (123, 456, 789);
SELECT test_copy_to_callback('public.test'::pg_catalog.regclass);
NOTICE: COPY TO callback called with data "1 2 3" and length 5
NOTICE: COPY TO callback called with data "12 34 56" and length 8
NOTICE: COPY TO callback called with data "123 456 789" and length 11
NOTICE: COPY TO callback has processed 3 rows
test_copy_to_callback
-----------------------
(1 row)
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