[ViewVC] Diff of: cvs/AnyEvent-DBI/DBI.pm

Comparing AnyEvent-DBI/DBI.pm (file contents):
Revision 1.5 by root, Mon Jun 9 15:30:41 2008 UTC vs.
Revision 1.19 by root, Mon Sep 4 11:46:30 2017 UTC

…		…
9	my $cv = AnyEvent->condvar;	9	my $cv = AnyEvent->condvar;
10		10
11	my $dbh = new AnyEvent::DBI "DBI:SQLite:dbname=test.db", "", "";	11	my $dbh = new AnyEvent::DBI "DBI:SQLite:dbname=test.db", "", "";
12		12
13	$dbh->exec ("select * from test where num=?", 10, sub {	13	$dbh->exec ("select * from test where num=?", 10, sub {
14	my ($rows) = @_;	14	my ($dbh, $rows, $rv) = @_;
		15
		16	$#_ or die "failure: $@";
15		17
16	print "@$_\n"	18	print "@$_\n"
17	for @$rows;	19	for @$rows;
18		20
19	$cv->broadcast;	21	$cv->broadcast;
…		…
26	=head1 DESCRIPTION	28	=head1 DESCRIPTION
27		29
28	This module is an L<AnyEvent> user, you need to make sure that you use and	30	This module is an L<AnyEvent> user, you need to make sure that you use and
29	run a supported event loop.	31	run a supported event loop.
30		32
31	This module implements asynchronous DBI access my forking or executing	33	This module implements asynchronous DBI access by forking or executing
32	separate "DBI-Server" processes and sending them requests.	34	separate "DBI-Server" processes and sending them requests.
33		35
34	It means that you can run DBI requests in parallel to other tasks.	36	It means that you can run DBI requests in parallel to other tasks.
35		37
36	The overhead for very simple statements ("select 0") is somewhere	38	With DBD::mysql, the overhead for very simple statements
37	around 120% to 200% (single/dual core CPU) compared to an explicit	39	("select 0") is somewhere around 50% compared to an explicit
38	prepare_cached/execute/fetchrow_arrayref/finish combination.	40	prepare_cached/execute/fetchrow_arrayref/finish combination. With
		41	DBD::SQlite3, it's more like a factor of 8 for this trivial statement.
		42
		43	=head2 ERROR HANDLING
		44
		45	This module defines a number of functions that accept a callback
		46	argument. All callbacks used by this module get their AnyEvent::DBI handle
		47	object passed as first argument.
		48
		49	If the request was successful, then there will be more arguments,
		50	otherwise there will only be the C<$dbh> argument and C<$@> contains an
		51	error message.
		52
		53	A convenient way to check whether an error occurred is to check C<$#_> -
		54	if that is true, then the function was successful, otherwise there was an
		55	error.
39		56
40	=cut	57	=cut
41		58
42	package AnyEvent::DBI;	59	package AnyEvent::DBI;
43		60
44	use strict;	61	use common::sense;
45	no warnings;
46		62
47	use Carp;	63	use Carp;
48	use Socket ();	64	use Convert::Scalar ();
49	use Scalar::Util ();	65	use AnyEvent::Fork ();
50	use Storable ();	66	use CBOR::XS ();
51
52	use DBI ();
53		67
54	use AnyEvent ();	68	use AnyEvent ();
55	use AnyEvent::Util ();	69	use AnyEvent::Util ();
56		70
		71	use Errno ();
		72
57	our $VERSION = '1.0';	73	our $VERSION = '3.02';
58
59	# this is the forked server code
60
61	our $DBH;
62
63	sub req_open {
64	my (undef, $dbi, $user, $pass, %attr) = @{+shift};
65
66	$DBH = DBI->connect ($dbi, $user, $pass, \%attr);
67
68	[1]
69	}
70
71	sub req_exec {
72	my (undef, $st, @args) = @{+shift};
73
74	my $sth = $DBH->prepare_cached ($st, undef, 1);
75
76	$sth->execute (@args)
77	or die $sth->errstr;
78
79	[$sth->fetchall_arrayref]
80	}
81
82	sub serve {
83	my ($fh) = @_;
84
85	no strict;
86
87	eval {
88	my $rbuf;
89
90	while () {
91	sysread $fh, $rbuf, 16384, length $rbuf
92	or last;
93
94	while () {
95	my $len = unpack "L", $rbuf;
96
97	# full request available?
98	last unless $len && $len + 4 <= length $rbuf;
99
100	my $req = Storable::thaw substr $rbuf, 4;
101	substr $rbuf, 0, $len + 4, ""; # remove length + request
102
103	my $wbuf = eval { pack "L/a*", Storable::freeze $req->[0]($req) };
104
105	$wbuf = pack "L/a*", Storable::freeze [undef, "$@"]
106	if $@;
107
108	for (my $ofs = 0; $ofs < length $wbuf; ) {
109	$ofs += (syswrite $fh, substr $wbuf, $ofs
110	or die "unable to write results");
111	}
112	}
113	}
114	};
115
116	kill 9, $$; # no other way on the broken windows platform
117	}
118		74
119	=head2 METHODS	75	=head2 METHODS
120		76
121	=over 4	77	=over 4
122		78
…		…
143		99
144	When an error occurs, then this callback will be invoked. On entry, C<$@>	100	When an error occurs, then this callback will be invoked. On entry, C<$@>
145	is set to the error message. C<$filename> and C<$line> is where the	101	is set to the error message. C<$filename> and C<$line> is where the
146	original request was submitted.	102	original request was submitted.
147		103
148	If this callback returns and this was a fatal error (C<$fatal> is true)	104	If the fatal argument is true then the database connection is shut down
149	then AnyEvent::DBI die's, otherwise it calls the original request callback	105	and your database handle became invalid. In addition to invoking the
150	without any arguments.	106	C<on_error> callback, all of your queued request callbacks are called
		107	without only the C<$dbh> argument.
151		108
152	If omitted, then C<die> will be called on any errors, fatal or not.	109	If omitted, then C<die> will be called on any errors, fatal or not.
153		110
		111	=item on_connect => $callback->($dbh[, $success])
		112
		113	If you supply an C<on_connect> callback, then this callback will be
		114	invoked after the database connect attempt. If the connection succeeds,
		115	C<$success> is true, otherwise it is missing and C<$@> contains the
		116	C<$DBI::errstr>.
		117
		118	Regardless of whether C<on_connect> is supplied, connect errors will result in
		119	C<on_error> being called. However, if no C<on_connect> callback is supplied, then
		120	connection errors are considered fatal. The client will C<die> and the C<on_error>
		121	callback will be called with C<$fatal> true.
		122
		123	When on_connect is supplied, connect error are not fatal and AnyEvent::DBI
		124	will not C<die>. You still cannot, however, use the $dbh object you
		125	received from C<new> to make requests.
		126
		127	=item fork_template => $AnyEvent::Fork-object
		128
		129	C<AnyEvent::DBI> uses C<< AnyEvent::Fork->new >> to create the database
		130	slave, which in turn either C<exec>'s a new process (similar to the old
		131	C<exec_server> constructor argument) or uses a process forked early (see
		132	L<AnyEvent::Fork::Early>).
		133
		134	With this argument you can provide your own fork template. This can be
		135	useful if you create a lot of C<AnyEvent::DBI> handles and want to save
		136	memory (And speed up startup) by not having to load C<AnyEvent::DBI> again
		137	and again into your child processes:
		138
		139	my $template = AnyEvent::Fork
		140	->new # create new template
		141	->require ("AnyEvent::DBI::Slave"); # preload AnyEvent::DBI::Slave module
		142
		143	for (...) {
		144	$dbh = new AnyEvent::DBI ...
		145	fork_template => $template;
		146
		147	=item timeout => seconds
		148
		149	If you supply a timeout parameter (fractional values are supported), then
		150	a timer is started any time the DBI handle expects a response from the
		151	server. This includes connection setup as well as requests made to the
		152	backend. The timeout spans the duration from the moment the first data
		153	is written (or queued to be written) until all expected responses are
		154	returned, but is postponed for "timeout" seconds each time more data is
		155	returned from the server. If the timer ever goes off then a fatal error is
		156	generated. If you have an C<on_error> handler installed, then it will be
		157	called, otherwise your program will die().
		158
		159	When altering your databases with timeouts it is wise to use
		160	transactions. If you quit due to timeout while performing insert, update
		161	or schema-altering commands you can end up not knowing if the action was
		162	submitted to the database, complicating recovery.
		163
		164	Timeout errors are always fatal.
		165
154	=back	166	=back
155		167
		168	Any additional key-value pairs will be rolled into a hash reference
		169	and passed as the final argument to the C<< DBI->connect (...) >>
		170	call. For example, to suppress errors on STDERR and send them instead to an
		171	AnyEvent::Handle you could do:
		172
		173	$dbh = new AnyEvent::DBI
		174	"DBI:mysql:test;mysql_read_default_file=/root/.my.cnf", "", "",
		175	PrintError => 0,
		176	on_error => sub {
		177	$log_handle->push_write ("DBI Error: $@ at $_[1]:$_[2]\n");
		178	};
		179
156	=cut	180	=cut
157
158	# stupid Storable autoloading, total loss-loss situation
159	Storable::thaw Storable::freeze [];
160		181
161	sub new {	182	sub new {
162	my ($class, $dbi, $user, $pass, %arg) = @_;	183	my ($class, $dbi, $user, $pass, %arg) = @_;
163		184
164	socketpair my $client, my $server, &Socket::AF_UNIX, &Socket::SOCK_STREAM, &Socket::PF_UNSPEC	185	# we use our own socketpair, so we always have a socket
		186	# available, even before the forked process exsist.
		187	# this is mostly done so this module is compatible
		188	# to versions of itself older than 3.0.
		189	my ($client, $server) = AnyEvent::Util::portable_socketpair
165	or croak "unable to create dbi communicaiton pipe: $!";	190	or croak "unable to create AnyEvent::DBI communications pipe: $!";
		191
		192	my $fork = delete $arg{fork_template};
		193
		194	my %dbi_args = %arg;
		195	delete @dbi_args{qw(on_connect on_error timeout fork_template exec_server)};
166		196
167	my $self = bless \%arg, $class;	197	my $self = bless \%arg, $class;
168		198
169	$self->{fh} = $client;	199	$self->{fh} = $client;
170
171	Scalar::Util::weaken (my $wself = $self);
172
173	AnyEvent::Util::fh_nonblocking $client, 1;
174		200
175	my $rbuf;	201	my $rbuf;
176	my @caller = (caller)[1,2]; # the "default" caller	202	my @caller = (caller)[1,2]; # the "default" caller
177		203
178	$self->{rw} = AnyEvent->io (fh => $client, poll => "r", cb => sub {	204	$fork = $fork ? $fork->fork : AnyEvent::Fork->new
179	my $len = sysread $client, $rbuf, 65536, length $rbuf;	205	or croak "fork: $!";
180		206
		207	$fork->require ("AnyEvent::DBI::Slave");
		208	$fork->send_arg ($VERSION);
		209	$fork->send_fh ($server);
		210
		211	# we don't rely on the callback, because we use our own
		212	# socketpair, for better or worse.
		213	$fork->run ("AnyEvent::DBI::Slave::serve", sub { });
		214
		215	{
		216	Convert::Scalar::weaken (my $self = $self);
		217
		218	my $cbor = new CBOR::XS;
		219
		220	$self->{rw} = AE::io $client, 0, sub {
		221	my $len = Convert::Scalar::extend_read $client, $rbuf, 65536;
		222
181	if ($len > 0) {	223	if ($len > 0) {
		224	# we received data, so reset the timer
		225	$self->{last_activity} = AE::now;
182		226
183	while () {	227	for my $res ($cbor->incr_parse_multiple ($rbuf)) {
184	my $len = unpack "L", $rbuf;	228	last unless $self;
185		229
186	# full request available?
187	last unless $len && $len + 4 <= length $rbuf;
188
189	my $res = Storable::thaw substr $rbuf, 4;
190	substr $rbuf, 0, $len + 4, ""; # remove length + request
191
192	my $req = shift @{ $wself->{queue} };	230	my $req = shift @{ $self->{queue} };
193		231
194	if (defined $res->[0]) {	232	if (defined $res->[0]) {
		233	$res->[0] = $self;
195	$req->[0](@$res);	234	$req->[0](@$res);
		235	} else {
		236	my $cb = shift @$req;
		237	local $@ = $res->[1];
		238	$cb->($self);
		239	$self->_error ($res->[1], @$req, $res->[2]) # error, request record, is_fatal
		240	if $self; # cb() could have deleted it
		241	}
		242
		243	# no more queued requests, so become idle
		244	if ($self && !@{ $self->{queue} }) {
		245	undef $self->{last_activity};
		246	$self->{tw_cb}->();
		247	}
		248	}
		249
		250	} elsif (defined $len) {
		251	# todo, caller?
		252	$self->_error ("unexpected eof", @caller, 1);
		253	} elsif ($! != Errno::EAGAIN) {
		254	# todo, caller?
		255	$self->_error ("read error: $!", @caller, 1);
		256	}
		257	};
		258
		259	$self->{tw_cb} = sub {
		260	if ($self->{timeout} && $self->{last_activity}) {
		261	if (AE::now > $self->{last_activity} + $self->{timeout}) {
		262	# we did time out
		263	my $req = $self->{queue}[0];
		264	$self->_error (timeout => $req->[1], $req->[2], 1); # timeouts are always fatal
196	} else {	265	} else {
197	my $cb = shift @$req;	266	# we need to re-set the timeout watcher
198	$wself->_error ($res->[1], @$req);	267	$self->{tw} = AE::timer
		268	$self->{last_activity} + $self->{timeout} - AE::now,
		269	0,
		270	$self->{tw_cb},
199	$cb->();	271	;
200	}	272	}
		273	} else {
		274	# no timeout check wanted, or idle
		275	undef $self->{tw};
201	}	276	}
202
203	} elsif (defined $len) {
204	$wself->_error ("unexpected eof", @caller, 1);
205	} else {
206	$wself->_error ("read error: $!", @caller, 1);
207	}	277	};
208	});
209		278
210	$self->{ww_cb} = sub {	279	$self->{ww_cb} = sub {
		280	$self->{last_activity} = AE::now;
		281
211	my $len = syswrite $client, $wself->{wbuf}	282	my $len = syswrite $client, $self->{wbuf}
212	or return delete $wself->{ww};	283	or return delete $self->{ww};
213		284
214	substr $wself->{wbuf}, 0, $len, "";	285	substr $self->{wbuf}, 0, $len, "";
		286	};
215	};	287	}
216		288
217	my $pid = fork;	289	$self->_req (
		290	sub {
		291	return unless $self;
		292	$self->{child_pid} = $_[1];
		293	},
		294	(caller)[1,2],
		295	"req_pid"
		296	);
218		297
219	if ($pid) {	298	$self->_req (
220	# parent	299	sub {
221	close $server;	300	return unless $self;
222		301	&{ $self->{on_connect} } if $self->{on_connect};
223	} elsif (defined $pid) {	302	},
224	# child	303	(caller)[1,2],
225	close $client;	304	req_open => $dbi, $user, $pass, %dbi_args
226	@_ = $server;	305	);
227	goto &serve;
228
229	} else {
230	croak "fork: $!";
231	}
232
233	$self->_req (sub { }, (caller)[1,2], 1, req_open => $dbi, $user, $pass);
234		306
235	$self	307	$self
		308	}
		309
		310	sub _server_pid {
		311	shift->{child_pid}
		312	}
		313
		314	sub kill_child {
		315	my $self = shift;
		316
		317	if (my $pid = delete $self->{child_pid}) {
		318	# kill and reap process
		319	my $kid_watcher; $kid_watcher = AE::child $pid, sub {
		320	undef $kid_watcher;
		321	};
		322	kill TERM => $pid;
		323	}
		324
		325	delete $self->{rw};
		326	delete $self->{ww};
		327	delete $self->{tw};
		328	close delete $self->{fh};
		329	}
		330
		331	sub DESTROY {
		332	shift->kill_child;
236	}	333	}
237		334
238	sub _error {	335	sub _error {
239	my ($self, $error, $filename, $line, $fatal) = @_;	336	my ($self, $error, $filename, $line, $fatal) = @_;
240		337
		338	if ($fatal) {
		339	delete $self->{tw};
241	delete $self->{rw};	340	delete $self->{rw};
242	delete $self->{ww};	341	delete $self->{ww};
243	delete $self->{fh};	342	delete $self->{fh};
244		343
		344	# for fatal errors call all enqueued callbacks with error
		345	while (my $req = shift @{$self->{queue}}) {
		346	local $@ = $error;
		347	$req->[0]->($self);
		348	}
		349	$self->kill_child;
		350	}
		351
245	$@ = $error;	352	local $@ = $error;
246		353
		354	if ($self->{on_error}) {
247	$self->{on_error}($self, $filename, $line, $fatal)	355	$self->{on_error}($self, $filename, $line, $fatal)
248	if $self->{on_error};	356	} else {
249
250	die "$error at $filename, line $line\n";	357	die "$error at $filename, line $line\n";
		358	}
		359	}
		360
		361	=item $dbh->on_error ($cb->($dbh, $filename, $line, $fatal))
		362
		363	Sets (or clears, with C<undef>) the C<on_error> handler.
		364
		365	=cut
		366
		367	sub on_error {
		368	$_[0]{on_error} = $_[1];
		369	}
		370
		371	=item $dbh->timeout ($seconds)
		372
		373	Sets (or clears, with C<undef>) the database timeout. Useful to extend the
		374	timeout when you are about to make a really long query.
		375
		376	=cut
		377
		378	sub timeout {
		379	my ($self, $timeout) = @_;
		380
		381	$self->{timeout} = $timeout;
		382
		383	# reschedule timer if one was running
		384	$self->{tw_cb}->();
251	}	385	}
252		386
253	sub _req {	387	sub _req {
254	my ($self, $cb, $filename, $line, $fatal) = splice @_, 0, 5, ();	388	my ($self, $cb, $filename, $line) = splice @_, 0, 4, ();
255		389
		390	unless ($self->{fh}) {
		391	local $@ = my $err = 'no database connection';
		392	$cb->($self);
		393	$self->_error ($err, $filename, $line, 1);
		394	return;
		395	}
		396
256	push @{ $self->{queue} }, [$cb, $filename, $line, $fatal];	397	push @{ $self->{queue} }, [$cb, $filename, $line];
257		398
258	$self->{wbuf} .= pack "L/a*", Storable::freeze \@_;	399	# re-start timeout if necessary
		400	if ($self->{timeout} && !$self->{tw}) {
		401	$self->{last_activity} = AE::now;
		402	$self->{tw_cb}->();
		403	}
		404
		405	$self->{wbuf} .= CBOR::XS::encode_cbor \@_;
259		406
260	unless ($self->{ww}) {	407	unless ($self->{ww}) {
261	my $len = syswrite $self->{fh}, $self->{wbuf};	408	my $len = syswrite $self->{fh}, $self->{wbuf};
262	substr $self->{wbuf}, 0, $len, "";	409	substr $self->{wbuf}, 0, $len, "";
263		410
264	# still any left? then install a write watcher	411	# still any left? then install a write watcher
265	$self->{ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $self->{ww_cb})	412	$self->{ww} = AE::io $self->{fh}, 1, $self->{ww_cb}
266	if length $self->{wbuf};	413	if length $self->{wbuf};
267	}	414	}
268	}	415	}
269		416
		417	=item $dbh->attr ($attr_name[, $attr_value], $cb->($dbh, $new_value))
		418
		419	An accessor for the database handle attributes, such as C<AutoCommit>,
		420	C<RaiseError>, C<PrintError> and so on. If you provide an C<$attr_value>
		421	(which might be C<undef>), then the given attribute will be set to that
		422	value.
		423
		424	The callback will be passed the database handle and the attribute's value
		425	if successful.
		426
		427	If an error occurs and the C<on_error> callback returns, then only C<$dbh>
		428	will be passed and C<$@> contains the error message.
		429
270	=item $dbh->exec ("statement", @args, $cb->($rows, %extra))	430	=item $dbh->exec ("statement", @args, $cb->($dbh, \@rows, $rv))
271		431
272	Executes the given SQL statement with placeholders replaced by	432	Executes the given SQL statement with placeholders replaced by
273	C<@args>. The statement will be prepared and cached on the server side, so	433	C<@args>. The statement will be prepared and cached on the server side, so
274	using placeholders is compulsory.	434	using placeholders is extremely important.
275		435
276	The callback will be called with the result of C<fetchall_arrayref> as	436	The callback will be called with a weakened AnyEvent::DBI object as the
277	first argument and possibly a hash reference with additional information.	437	first argument and the result of C<fetchall_arrayref> as (or C<undef>
		438	if the statement wasn't a select statement) as the second argument.
278		439
		440	Third argument is the return value from the C<< DBI->execute >> method
		441	call.
		442
279	If an error occurs and the C<on_error> callback returns, then no arguments	443	If an error occurs and the C<on_error> callback returns, then only C<$dbh>
280	will be passed and C<$@> contains the error message.	444	will be passed and C<$@> contains the error message.
281		445
		446	=item $dbh->stattr ($attr_name, $cb->($dbh, $value))
		447
		448	An accessor for the statement attributes of the most recently executed
		449	statement, such as C<NAME> or C<TYPE>.
		450
		451	The callback will be passed the database handle and the attribute's value
		452	if successful.
		453
		454	If an error occurs and the C<on_error> callback returns, then only C<$dbh>
		455	will be passed and C<$@> contains the error message.
		456
		457	=item $dbh->begin_work ($cb->($dbh[, $rc]))
		458
		459	=item $dbh->commit ($cb->($dbh[, $rc]))
		460
		461	=item $dbh->rollback ($cb->($dbh[, $rc]))
		462
		463	The begin_work, commit, and rollback methods expose the equivalent
		464	transaction control method of the DBI driver. On success, C<$rc> is true.
		465
		466	If an error occurs and the C<on_error> callback returns, then only C<$dbh>
		467	will be passed and C<$@> contains the error message.
		468
		469	=item $dbh->func ('string_which_yields_args_when_evaled', $func_name, $cb->($dbh, $rc, $dbi_err, $dbi_errstr))
		470
		471	This gives access to database driver private methods. Because they
		472	are not standard you cannot always depend on the value of C<$rc> or
		473	C<$dbi_err>. Check the documentation for your specific driver/function
		474	combination to see what it returns.
		475
		476	Note that the first argument will be eval'ed to produce the argument list to
		477	the func() method. This must be done because the serialization protocol
		478	between the AnyEvent::DBI server process and your program does not support the
		479	passage of closures.
		480
		481	Here's an example to extend the query language in SQLite so it supports an
		482	intstr() function:
		483
		484	$cv = AnyEvent->condvar;
		485	$dbh->func (
		486	q{
		487	instr => 2, sub {
		488	my ($string, $search) = @_;
		489	return index $string, $search;
		490	},
		491	},
		492	create_function => sub {
		493	return $cv->send ($@)
		494	unless $#_;
		495	$cv->send (undef, @_[1,2,3]);
		496	}
		497	);
		498
		499	my ($err,$rc,$errcode,$errstr) = $cv->recv;
		500
		501	die $err if defined $err;
		502	die "EVAL failed: $errstr"
		503	if $errcode;
		504
		505	# otherwise, we can ignore $rc and $errcode for this particular func
		506
282	=cut	507	=cut
283		508
284	sub exec {	509	for my $cmd_name (qw(attr exec stattr begin_work commit rollback func)) {
		510	eval 'sub ' . $cmd_name . '{
285	my $cb = pop;	511	my $cb = pop;
286	splice @_, 1, 0, $cb, (caller)[1,2], 0, "req_exec";	512	splice @_, 1, 0, $cb, (caller)[1,2], "req_' . $cmd_name . '";
287		513	&_req
288	goto &_req;	514	}';
289	}	515	}
290		516
291	=back	517	=back
292		518
293	=head1 SEE ALSO	519	=head1 SEE ALSO
294		520
295	L<AnyEvent>, L<DBI>.	521	L<AnyEvent>, L<DBI>, L<Coro::Mysql>.
296		522
297	=head1 AUTHOR	523	=head1 AUTHOR AND CONTACT
298		524
299	Marc Lehmann <schmorp@schmorp.de>	525	Marc Lehmann <schmorp@schmorp.de> (current maintainer)
300	http://home.schmorp.de/	526	http://home.schmorp.de/
301		527
		528	Adam Rosenstein <adam@redcondor.com>
		529	http://www.redcondor.com/
		530
302	=cut	531	=cut
303		532
304	1	533	1
305

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Comparing AnyEvent-DBI/DBI.pm (file contents): Revision 1.5 by root, Mon Jun 9 15:30:41 2008 UTC vs. Revision 1.19 by root, Mon Sep 4 11:46:30 2017 UTC

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Comparing AnyEvent-DBI/DBI.pm (file contents):
Revision 1.5 by root, Mon Jun 9 15:30:41 2008 UTC vs.
Revision 1.19 by root, Mon Sep 4 11:46:30 2017 UTC