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Fix pg_stat_statements for MERGE

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We weren't jumbling the merge action list, so wildly different commands
would be considered to use the same query ID.  Add that, mention it in
the docs, and some test lines.

Backpatch to 15.

Author: Tatsu <bt22nakamorit@oss.nttdata.com>
Reviewed-by: Julien Rouhaud <rjuju123@gmail.com>
Discussion: https://postgr.es/m/d87e391694db75a038abc3b2597828e8@oss.nttdata.com
This commit is contained in:
Alvaro Herrera
2022-09-27 10:44:42 +02:00
parent d1f95fa247
commit 72abf03b64
5 changed files with 77 additions and 5 deletions
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4
doc/src/sgml/pgstatstatements.sgml
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@ -487,7 +487,7 @@
<para>
Plannable queries (that is, <command>SELECT</command>, <command>INSERT</command>,
<command>UPDATE</command>, and <command>DELETE</command>) are combined into a single
<command>UPDATE</command>, <command>DELETE</command>, and <command>MERGE</command>) are combined into a single
<structname>pg_stat_statements</structname> entry whenever they have identical query
structures according to an internal hash calculation. Typically, two
queries will be considered the same for this purpose if they are
@ -783,7 +783,7 @@
<varname>pg_stat_statements.track_utility</varname> controls whether
utility commands are tracked by the module. Utility commands are
all those other than <command>SELECT</command>, <command>INSERT</command>,
<command>UPDATE</command> and <command>DELETE</command>.
<command>UPDATE</command>, <command>DELETE</command>, and <command>MERGE</command>.
The default value is <literal>on</literal>.
Only superusers can change this setting.
</para>