On Jul 16, 2015, at 6:40 AM, Tim Bunce <tim.bu...@pobox.com> wrote:

> Well, this contains lots more light! ...
> 
>>> -> dbd_st_execute for 03fdf4e0
>>>> parse_params statement 
>>>        SELECT c.change_id ...
> 
>>> Binding parameters: SELECT c.change_id
> 
>>>        --> do_error
>>> Out of sort memory, consider increasing server sort buffer size error 1038 
>>> recorded: Out of sort memory, consider increasing server sort buffer size
>>>        <-- do_error
>>> <- dbd_st_execute returning imp_sth->row_num 18446744073709551615
>>>    !! ERROR: 1038 'Out of sort memory, consider increasing server sort 
>>> buffer size' (err#0)
>>>    <- execute= ( -1 ) [1 items] at /usr/lib/perl5/DBI.pm line 1632 via  at 
>>> /usr/local/share/perl/5.18.2/App/Sqitch/Role/DBIEngine.pm line 149
> 
> So execute failed. Note the crazy row_num. Execute seems to have
> returned -1, which is a true value.
> 
>>>    !! The ERROR '1038' was CLEARED by call to fetchrow_hashref method
>>>    -> fetchrow_hashref for DBD::mysql::st 
>>> (DBI::st=HASH(0x42cfcc0)~0x4231cf8) thr#2603010
> 
> Then the higher-level code called fetchrow_hashref, which cleared the
> error recorded by execute().

FWIW, the database handle is created like this:

        my $dbh = DBI->connect($uri->dbi_dsn, scalar $self->username, $pass, {
            PrintError           => 0,
            RaiseError           => 0,
            AutoCommit           => 1,
            mysql_enable_utf8    => 1,
            mysql_auto_reconnect => 0,
            mysql_use_result     => 0, # Prevent "Commands out of sync" error.
            HandleError          => sub {
                my ($err, $dbh) = @_;
                $@ = $err;
                @_ = ($dbh->state || 'DEV' => $dbh->errstr);
                goto &hurl;
            },

Context: 
https://github.com/theory/sqitch/blob/master/lib/App/Sqitch/Engine/mysql.pm#L59

So I’m a little confused as to why the execute failure was ignored. Is this an 
issue with DBD::mysql?

I assume the OP’s server could use some tuning. Seems pretty weird, though.

Thanks,

David

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