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psql: Make default \watch interval configurable

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The default interval for \watch to wait between executing queries,
when executed without a specified interval, was hardcoded to two
seconds.  This adds the new variable WATCH_INTERVAL which is used
to set the default interval, making it configurable for the user.
This makes \watch the first command which has a user configurable
default setting.

Author: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Kirill Reshke <reshkekirill@gmail.com>
Reviewed-by: Masahiro Ikeda <ikedamsh@oss.nttdata.com>
Reviewed-by: Laurenz Albe <laurenz.albe@cybertec.at>
Reviewed-by: Greg Sabino Mullane <htamfids@gmail.com>
Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Discussion: https://postgr.es/m/B2FD26B4-8F64-4552-A603-5CC3DF1C7103@yesql.se
This commit is contained in:
Daniel Gustafsson
2025-03-25 17:53:33 +01:00
parent a19db08274
commit 1a759c8327
8 changed files with 141 additions and 2 deletions
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6
src/bin/psql/command.c
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@@ -3278,7 +3278,7 @@ exec_command_watch(PsqlScanState scan_state, bool active_branch,
bool have_sleep = false;
bool have_iter = false;
bool have_min_rows = false;
double sleep = 2;
double sleep = pset.watch_interval;
int iter = 0;
int min_rows = 0;
@@ -3292,7 +3292,9 @@ exec_command_watch(PsqlScanState scan_state, bool active_branch,
/*
* Parse arguments. We allow either an unlabeled interval or
* "name=value", where name is from the set ('i', 'interval', 'c',
* 'count', 'm', 'min_rows').
* 'count', 'm', 'min_rows'). The parsing of interval value should be
* kept in sync with ParseVariableDouble which is used for setting the
* default interval value.
*/
while (success)
{