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| author | Peter Eisentraut <peter@eisentraut.org> | 2020-11-25 15:30:18 +0100 |
|---|---|---|
| committer | Peter Eisentraut <peter@eisentraut.org> | 2020-11-25 15:30:18 +0100 |
| commit | f73999262ed6c40d9a7c3d7cccec7143d4d15287 (patch) | |
| tree | b8f9d03bd2943346d96e7a70fa33816502e1030b /src/backend/tcop/postgres.c | |
| parent | 2fbd786c3446b1bc90f396d3fa5f4614b0a57d89 (diff) | |
| download | postgresql-f73999262ed6c40d9a7c3d7cccec7143d4d15287.tar.gz postgresql-f73999262ed6c40d9a7c3d7cccec7143d4d15287.zip | |
tablefunc: Reject negative number of tuples passed to normal_rand()
The function converted the first argument i.e. the number of tuples to
return into an unsigned integer which turns out to be huge number when
a negative value is passed. This causes the function to take much
longer time to execute. Instead, reject a negative value.
(If someone really wants to generate many more result rows, they
should consider adding a bigint or numeric variant.)
While at it, improve SQL test to test the number of tuples returned by
this function.
Author: Ashutosh Bapat <ashutosh.bapat@2ndquadrant.com>
Discussion: https://www.postgresql.org/message-id/CAG-ACPW3PUUmSnM6cLa9Rw4BEC5cEMKjX8Gogc8gvQcT3cYA1A@mail.gmail.com
Diffstat (limited to 'src/backend/tcop/postgres.c')
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