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141 lines
2.4 KiB
Perl
Executable File
141 lines
2.4 KiB
Perl
Executable File
#!/usr/bin/perl
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# Copyright (c) 2021-2025, PostgreSQL Global Development Group
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use strict;
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use warnings FATAL => 'all';
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# make sure we are in a sane environment.
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use DBI();
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use DBD::Pg();
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use Time::HiRes qw( usleep ualarm gettimeofday tv_interval );
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use Getopt::Std;
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my %opt;
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getopts('d:b:s:veorauc', \%opt);
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if (!(scalar %opt && defined $opt{s}))
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{
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print <<EOT;
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Usage:
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$0 -d DATABASE -s SECTIONS [-b NUMBER] [-v] [-e] [-o] [-r] [-a] [-u]
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-d DATABASE -DATABASE
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-b NUMBER -number of repeats
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-s SECTIONS -sections, format sid1[,sid2[,sid3[...]]]]
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-v -verbose (show SQL)
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-e -show explain
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-r -use RD-tree index
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-a -AND section
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-o -show output
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-u -unique
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-c -count
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EOT
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exit;
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}
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$opt{d} ||= '_int4';
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my $dbi = DBI->connect('DBI:Pg:dbname=' . $opt{d});
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my %table;
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my @where;
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$table{message} = 1;
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if ($opt{a})
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{
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if ($opt{r})
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{
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push @where, "message.sections @ '{$opt{s}}'";
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}
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else
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{
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foreach my $sid (split(/[,\s]+/, $opt{s}))
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{
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push @where, "message.mid = msp$sid.mid";
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push @where, "msp$sid.sid = $sid";
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$table{"message_section_map msp$sid"} = 1;
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}
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}
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}
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else
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{
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if ($opt{r})
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{
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push @where, "message.sections && '{$opt{s}}'";
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}
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else
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{
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$table{message_section_map} = 1;
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push @where, "message.mid = message_section_map.mid";
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push @where, "message_section_map.sid in ($opt{s})";
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}
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}
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my $outf;
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if ($opt{c})
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{
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$outf =
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($opt{u}) ? 'count( distinct message.mid )' : 'count( message.mid )';
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}
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else
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{
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$outf = ($opt{u}) ? 'distinct( message.mid )' : 'message.mid';
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}
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my $sql =
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"select $outf from "
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. join(', ', keys %table)
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. " where "
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. join(' AND ', @where) . ';';
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if ($opt{v})
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{
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print "$sql\n";
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}
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if ($opt{e})
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{
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my @plan =
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map { "$_->[0]\n" } @{ $dbi->selectall_arrayref("explain $sql") };
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print @plan;
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}
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my $t0 = [gettimeofday];
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my $count = 0;
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my $b = $opt{b};
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$b ||= 1;
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my @a;
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foreach (1 .. $b)
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{
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@a = exec_sql($dbi, $sql);
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$count = $#a;
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}
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my $elapsed = tv_interval($t0, [gettimeofday]);
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if ($opt{o})
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{
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foreach (@a)
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{
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print "$_->{mid}\t$_->{sections}\n";
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}
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}
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print sprintf(
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"total: %.02f sec; number: %d; for one: %.03f sec; found %d docs\n",
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$elapsed, $b, $elapsed / $b,
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$count + 1);
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$dbi->disconnect;
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sub exec_sql
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{
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my ($dbi, $sql, @keys) = @_;
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my $sth = $dbi->prepare($sql) || die;
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$sth->execute(@keys) || die;
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my $r;
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my @row;
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while (defined($r = $sth->fetchrow_hashref))
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{
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push @row, $r;
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}
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$sth->finish;
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return @row;
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}
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