2015-09-10 11:33:22 +02:00
#!/usr/bin/perl
use charnames ':full'; # only necessary before v5.16
use strict;
use v5.10;
use warnings;
use DBIx::SimpleConnect;
use Encode qw(:fallbacks encode);
my $db = shift // "default";
2015-09-10 12:21:01 +02:00
my $dbh = DBIx::SimpleConnect->connect($db, {RaiseError => 1});
2015-09-10 11:33:22 +02:00
my $sth
= $dbh->prepare("
select locks_blocking.pid as blocking_pid,
query_blocking.query as blocking_query,
query_blocking.usename as blocking_username,
locks_blocked.pid as blocked_pid,
query_blocked.query as blocked_query,
query_blocked.usename as blocked_username
2015-09-10 12:21:01 +02:00
from pg_locks locks_blocked join pg_locks locks_blocking
on (locks_blocked.locktype='relation' and locks_blocking.locktype='relation' and locks_blocked.database=locks_blocking.database and locks_blocked.relation=locks_blocking.relation
or locks_blocked.locktype='transactionid' and locks_blocking.locktype='transactionid' and locks_blocked.transactionid=locks_blocking.transactionid
-- don't know how to handle virtualxid
)
2015-09-10 11:33:22 +02:00
join pg_stat_activity query_blocked on (locks_blocked.pid=query_blocked.pid)
join pg_stat_activity query_blocking on (locks_blocking.pid = query_blocking.pid)
where locks_blocking.granted and not locks_blocked.granted
"
);
$sth->execute();
my $locks = $sth->fetchall_arrayref();
2015-09-10 11:58:52 +02:00
binmode STDOUT, ":encoding(UTF-8)";
say "<!DOCTYPE html";
say "<html>";
say "<head>";
say "<meta charset='UTF-8'/>";
say "</head>";
say "<body>";
2015-09-10 11:33:22 +02:00
if (@$locks) {
say "<table>";
say "<tr>";
say map {
"<th>" . xmlencode($_) . "</th>"
} @{$sth->{NAME}};
say "</tr>";
for my $lk (@$locks) {
say "<tr>";
say map {
"<td>"
. (defined($_) ? xmlencode($_) : '<em>NULL</em>')
. "</td>"
} @$lk;
say "</tr>";
}
say "</table>";
} else {
say "<p>No locks \N{WHITE SMILING FACE}</p>";
}
2015-09-10 11:58:52 +02:00
say "</body>";
say "</html>";
exit(0);
2015-09-10 11:33:22 +02:00
sub xmlencode {
my ($s) = @_;
return encode("us-ascii", $s, FB_XMLCREF);
}
