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postgres_fdw: Make postgres_fdw.application_name support more escape sequences.

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Commit 6e0cb3dec1 allowed postgres_fdw.application_name to include
escape sequences %a (application name), %d (database name), %u (user name)
and %p (pid). In addition to them, this commit makes it support
the escape sequences for session ID (%c) and cluster name (%C).
These are helpful to investigate where each remote transactions came from.

Author: Fujii Masao
Reviewed-by: Ryohei Takahashi, Kyotaro Horiguchi
Discussion: https://postgr.es/m/1041dc9a-c976-049f-9f14-e7d94c29c4b2@oss.nttdata.com
This commit is contained in:
Fujii Masao
2022-02-18 11:38:12 +09:00
parent c476f380e2
commit 94c49d5340
5 changed files with 52 additions and 1 deletions
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14
doc/src/sgml/postgres-fdw.sgml
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@ -984,6 +984,20 @@ postgres=# SELECT postgres_fdw_disconnect_all();
<entry><literal>%a</literal></entry>
<entry>Application name on local server</entry>
</row>
<row>
<entry><literal>%c</literal></entry>
<entry>
Session ID on local server
(see <xref linkend="guc-log-line-prefix"/> for details)
</entry>
</row>
<row>
<entry><literal>%C</literal></entry>
<entry>
Cluster name in local server
(see <xref linkend="guc-cluster-name"/> for details)
</entry>
</row>
<row>
<entry><literal>%u</literal></entry>
<entry>User name on local server</entry>