diff options
author | Eric Wong <e@80x24.org> | 2021-10-21 21:10:31 +0000 |
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committer | Eric Wong <e@80x24.org> | 2021-10-22 00:54:50 +0000 |
commit | 2c354e17694da744c6dc1ab19c14af3d456b28bb (patch) | |
tree | 192dab7aba9eff77833050cb9b3d7957cb9690dd | |
parent | 17a178cd376fc132370ec4a172ce9dc5f71d8622 (diff) | |
download | public-inbox-2c354e17694da744c6dc1ab19c14af3d456b28bb.tar.gz |
We need a transaction across two SQL statements so readers (which don't use flock) will see the result as atomic. This may help against some occasional test failures I'm seeing from t/lei-auto-watch.t and t/lei-watch.t, or make the problem more apparent.
-rw-r--r-- | lib/PublicInbox/LeiMailSync.pm | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/PublicInbox/LeiMailSync.pm b/lib/PublicInbox/LeiMailSync.pm index e70cb5de..124eb969 100644 --- a/lib/PublicInbox/LeiMailSync.pm +++ b/lib/PublicInbox/LeiMailSync.pm @@ -182,16 +182,20 @@ sub mv_src { my ($self, $folder, $oidbin, $id, $newbn) = @_; my $lk = $self->lock_for_scope; my $fid = $self->{fmap}->{$folder} //= fid_for($self, $folder, 1); + $self->{dbh}->begin_work; my $sth = $self->{dbh}->prepare_cached(<<''); UPDATE blob2name SET name = ? WHERE fid = ? AND oidbin = ? AND name = ? - my $nr = $sth->execute($newbn, $fid, $oidbin, $$id); - if ($nr == 0) { # may race with a clear_src, ensure new value exists + # eval since unique constraint may fail due to race + my $nr = eval { $sth->execute($newbn, $fid, $oidbin, $$id) }; + if (!defined($nr) || $nr == 0) { # $nr may be `0E0' + # may race with a clear_src, ensure new value exists $sth = $self->{dbh}->prepare_cached(<<''); INSERT OR IGNORE INTO blob2name (oidbin, fid, name) VALUES (?, ?, ?) $sth->execute($oidbin, $fid, $newbn); } + $self->{dbh}->commit; } # read-only, iterates every oidbin + UID or name for a given folder |