Dear all.
I suggest adding a limit option to the copy function that limits count of input/output.
I think this will be useful for testing with sample data.
Usage is similar to SELECT LIMIT.
COPY TO : COPY (Table) TO '(File)' CSV LIMIT (count);
COPY FROM : COPY (Table) FROM '(File)' BINARY LIMIT (count);
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copy-limit-feature.patch
Description: Binary data