psql: Fix \watch when using interval values less than 1ms
Attempting to use an interval of time less than 1ms would cause \watch
to hang. This was confusing, so let's change the logic so as an
interval lower than 1ms behaves the same as 0.
Comments are added to mention that the internals of do_watch() had
better rely on "sleep_ms", the interval value in milliseconds. While on
it, this commit adds a test to check the behavior of interval values
less than 1ms.
\watch hanging for interval values less than 1ms existed before
6f9ee74d45aa, that has changed the code to support an interval value of
0.
Reported-by: Heikki Linnakangas
Author: Andrey M. Borodin, Michael Paquier
Discussion: https://postgr.es/m/88445e0e-3156-4b9d-afae-9a1a7b1631f6@iki.fi
Backpatch-through: 16
Branch
------
REL_17_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/8a6170860c83d3f44b7d97193a2c23539c24f76d
Modified Files
--------------
src/bin/psql/command.c | 11 ++++++++---
src/bin/psql/t/001_basic.pl | 10 ++++++++--
2 files changed, 16 insertions(+), 5 deletions(-)
