031c3e6d95
* We meant well but it turns out that the array unnest and join is actually very slow, as the join arguments do not get pushed down into the CTE (in Postgres 9/10 at least, later versions remove some of the optimization barriers in that specifc type of query) * This caused a seq scan on both device and device_port, and the query is executed many times during macsuck * The query is now rewritten to use ANY (macaddr[]) and without CTE, which seems to be around 20x faster
50 lines
1.1 KiB
Perl
50 lines
1.1 KiB
Perl
package App::Netdisco::Util::PortMAC;
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use Dancer qw/:syntax :script/;
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use Dancer::Plugin::DBIC 'schema';
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use base 'Exporter';
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our @EXPORT = ();
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our @EXPORT_OK = qw/ get_port_macs /;
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our %EXPORT_TAGS = (all => \@EXPORT_OK);
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=head1 NAME
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App::Netdisco::Util::PortMAC
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=head1 DESCRIPTION
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Helper subroutine to support parts of the Netdisco application.
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There are no default exports, however the C<:all> tag will export all
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subroutines.
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=head1 EXPORT_OK
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=head2 get_port_macs
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Returns a Hash reference of C<< { MAC => IP } >> for all interface MAC
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addresses supplied as array reference
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=cut
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sub get_port_macs {
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my ($fw_mac_list) = $_[0];
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my $port_macs = {};
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return {} unless ref [] eq ref $fw_mac_list and @{$fw_mac_list} >= 1;
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my $bindarray = [ { sqlt_datatype => "array" }, $fw_mac_list ];
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my $macs
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= schema('netdisco')->resultset('Virtual::PortMacs')->search({},
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{ bind => [$bindarray, $bindarray], select => [ 'mac', 'ip' ], group_by => [ 'mac', 'ip' ] } );
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my $cursor = $macs->cursor;
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while ( my @vals = $cursor->next ) {
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$port_macs->{ $vals[0] } = $vals[1];
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}
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return $port_macs;
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}
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1;
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