Topic on Project:Support desk

I installed mediawiki 1.39.4 and my SGBD randomly prints this error on wiki database:

' ERROR:  syntax error at or near "pg_advisory_unlock_all" at character 1 '

Investigating the code, I found that the file DatabasePostgres.php on doFlushSession function, call a sql query "pg_advisory_unlock_all()" without the lexic SELECT and I think that is why it isnt working.

Reported as https://phabricator.wikimedia.org/T342351