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Improve readability of the output of psql's \timing command.

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In addition to the existing decimal-milliseconds output value,
display the same value in mm:ss.fff format if it exceeds one second.
Tack on hours and even days fields if the interval is large enough.
This avoids needing mental arithmetic to convert the values into
customary time units.

Corey Huinker, reviewed by Gerdan Santos; bikeshedding by many

Discussion: <CADkLM=dbC4R8sbbuFXQVBFWoJGQkTEW8RWnC0PbW9nZsovZpJQ@mail.gmail.com>
This commit is contained in:
Tom Lane
2016-09-03 15:29:03 -04:00
parent 600dc4c0da
commit 6591f4226c
2 changed files with 59 additions and 4 deletions
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7
doc/src/sgml/ref/psql-ref.sgml
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@ -2789,8 +2789,11 @@ testdb=&gt; <userinput>\setenv LESS -imx4F</userinput>
<term><literal>\timing [ <replaceable class="parameter">on</replaceable> | <replaceable class="parameter">off</replaceable> ]</literal></term>
<listitem>
<para>
Without parameter, toggles a display of how long each SQL statement
takes, in milliseconds. With parameter, sets same.
With a parameter, turns displaying of how long each SQL statement
takes on or off. Without a parameter, toggles the display between
on and off. The display is in milliseconds; intervals longer than
1 second are also shown in minutes:seconds format, with hours and
days fields added if needed.
</para>
</listitem>
</varlistentry>