$self->meta_accessor('last_commit', $commit);
}
+# v2 uses this to keep track of how up-to-date Xapian is
+# old versions may be automatically GC'ed away in the future,
+# but it's a trivial amount of storage.
+sub last_commit_xap {
+ my ($self, $version, $i, $commit) = @_;
+ $self->meta_accessor("last_xap$version-$i", $commit);
+}
+
sub created_at {
my ($self, $second) = @_;
$self->meta_accessor('created_at', $second);
sub mid_insert {
my ($self, $mid) = @_;
my $dbh = $self->{dbh};
- my $sql = 'INSERT OR IGNORE INTO msgmap (mid) VALUES (?)';
- my $sth = $self->{mid_insert} ||= $dbh->prepare($sql);
- $sth->bind_param(1, $mid);
- return if $sth->execute == 0;
+ my $sth = $dbh->prepare_cached(<<'');
+INSERT OR IGNORE INTO msgmap (mid) VALUES (?)
+
+ return if $sth->execute($mid) == 0;
$dbh->last_insert_id(undef, undef, 'msgmap', 'num');
}
sub minmax {
my ($self) = @_;
my $dbh = $self->{dbh};
- my $sth = $self->{num_minmax} ||=
- $dbh->prepare('SELECT MIN(num),MAX(num) FROM msgmap');
+ # breaking MIN and MAX into separate queries speeds up from 250ms
+ # to around 700us with 2.7million messages.
+ my $sth = $dbh->prepare_cached('SELECT MIN(num) FROM msgmap', undef, 1);
+ $sth->execute;
+ my $min = $sth->fetchrow_array;
+ $sth = $dbh->prepare_cached('SELECT MAX(num) FROM msgmap', undef, 1);
$sth->execute;
- $sth->fetchrow_array;
+ ($min, $sth->fetchrow_array);
}
sub mid_prefixes {
$ids;
}
+sub msg_range {
+ my ($self, $beg, $end) = @_;
+ my $dbh = $self->{dbh};
+ my $attr = { Columns => [] };
+ my $mids = $dbh->selectall_arrayref(<<'', $attr, $$beg, $end);
+SELECT num,mid FROM msgmap WHERE num >= ? AND num <= ?
+ORDER BY num ASC
+
+ $$beg = $mids->[-1]->[0] + 1 if @$mids;
+ $mids
+}
+
# only used for mapping external serial numbers (e.g. articles from gmane)
# see scripts/xhdr-num2mid or PublicInbox::Filter::RubyLang for usage
sub mid_set {