1 package DBIx::Class::Storage::DBI;
2 # -*- mode: cperl; cperl-indent-level: 2 -*-
7 use base qw/DBIx::Class::Storage::DBIHacks DBIx::Class::Storage/;
10 use DBIx::Class::Carp;
11 use DBIx::Class::Exception;
12 use Scalar::Util qw/refaddr weaken reftype blessed/;
13 use List::Util qw/first/;
14 use Sub::Name 'subname';
15 use Context::Preserve 'preserve_context';
18 use Data::Compare (); # no imports!!! guard against insane architecture
21 # default cursor class, overridable in connect_info attributes
22 __PACKAGE__->cursor_class('DBIx::Class::Storage::DBI::Cursor');
24 __PACKAGE__->mk_group_accessors('inherited' => qw/
25 sql_limit_dialect sql_quote_char sql_name_sep
28 __PACKAGE__->mk_group_accessors('component_class' => qw/sql_maker_class datetime_parser_type/);
30 __PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker');
31 __PACKAGE__->datetime_parser_type('DateTime::Format::MySQL'); # historic default
33 __PACKAGE__->sql_name_sep('.');
35 __PACKAGE__->mk_group_accessors('simple' => qw/
36 _connect_info _dbi_connect_info _dbic_connect_attributes _driver_determined
37 _dbh _dbh_details _conn_pid _sql_maker _sql_maker_opts _dbh_autocommit
38 _perform_autoinc_retrieval _autoinc_supplied_for_op
41 # the values for these accessors are picked out (and deleted) from
42 # the attribute hashref passed to connect_info
43 my @storage_options = qw/
44 on_connect_call on_disconnect_call on_connect_do on_disconnect_do
45 disable_sth_caching unsafe auto_savepoint
47 __PACKAGE__->mk_group_accessors('simple' => @storage_options);
50 # capability definitions, using a 2-tiered accessor system
53 # A driver/user may define _use_X, which blindly without any checks says:
54 # "(do not) use this capability", (use_dbms_capability is an "inherited"
57 # If _use_X is undef, _supports_X is then queried. This is a "simple" style
58 # accessor, which in turn calls _determine_supports_X, and stores the return
59 # in a special slot on the storage object, which is wiped every time a $dbh
60 # reconnection takes place (it is not guaranteed that upon reconnection we
61 # will get the same rdbms version). _determine_supports_X does not need to
62 # exist on a driver, as we ->can for it before calling.
64 my @capabilities = (qw/
66 insert_returning_bound
75 __PACKAGE__->mk_group_accessors( dbms_capability => map { "_supports_$_" } @capabilities );
76 __PACKAGE__->mk_group_accessors( use_dbms_capability => map { "_use_$_" } (@capabilities ) );
78 # on by default, not strictly a capability (pending rewrite)
79 __PACKAGE__->_use_join_optimizer (1);
80 sub _determine_supports_join_optimizer { 1 };
82 # Each of these methods need _determine_driver called before itself
83 # in order to function reliably. This is a purely DRY optimization
85 # get_(use)_dbms_capability need to be called on the correct Storage
86 # class, as _use_X may be hardcoded class-wide, and _supports_X calls
87 # _determine_supports_X which obv. needs a correct driver as well
88 my @rdbms_specific_methods = qw/
102 with_deferred_fk_checks
104 get_use_dbms_capability
111 for my $meth (@rdbms_specific_methods) {
113 my $orig = __PACKAGE__->can ($meth)
114 or die "$meth is not a ::Storage::DBI method!";
117 no warnings qw/redefine/;
118 *{__PACKAGE__ ."::$meth"} = subname $meth => sub {
120 # only fire when invoked on an instance, a valid class-based invocation
121 # would e.g. be setting a default for an inherited accessor
124 ! $_[0]->_driver_determined
126 ! $_[0]->{_in_determine_driver}
128 $_[0]->_determine_driver;
130 # This for some reason crashes and burns on perl 5.8.1
131 # IFF the method ends up throwing an exception
132 #goto $_[0]->can ($meth);
134 my $cref = $_[0]->can ($meth);
144 DBIx::Class::Storage::DBI - DBI storage handler
148 my $schema = MySchema->connect('dbi:SQLite:my.db');
150 $schema->storage->debug(1);
152 my @stuff = $schema->storage->dbh_do(
154 my ($storage, $dbh, @args) = @_;
155 $dbh->do("DROP TABLE authors");
160 $schema->resultset('Book')->search({
161 written_on => $schema->storage->datetime_parser->format_datetime(DateTime->now)
166 This class represents the connection to an RDBMS via L<DBI>. See
167 L<DBIx::Class::Storage> for general information. This pod only
168 documents DBI-specific methods and behaviors.
175 my $new = shift->next::method(@_);
177 $new->_sql_maker_opts({});
178 $new->_dbh_details({});
179 $new->{_in_do_block} = 0;
180 $new->{_dbh_gen} = 0;
182 # read below to see what this does
183 $new->_arm_global_destructor;
188 # This is hack to work around perl shooting stuff in random
189 # order on exit(). If we do not walk the remaining storage
190 # objects in an END block, there is a *small but real* chance
191 # of a fork()ed child to kill the parent's shared DBI handle,
192 # *before perl reaches the DESTROY in this package*
193 # Yes, it is ugly and effective.
194 # Additionally this registry is used by the CLONE method to
195 # make sure no handles are shared between threads
197 my %seek_and_destroy;
199 sub _arm_global_destructor {
201 my $key = refaddr ($self);
202 $seek_and_destroy{$key} = $self;
203 weaken ($seek_and_destroy{$key});
207 local $?; # just in case the DBI destructor changes it somehow
209 # destroy just the object if not native to this process/thread
210 $_->_verify_pid for (grep
212 values %seek_and_destroy
217 # As per DBI's recommendation, DBIC disconnects all handles as
218 # soon as possible (DBIC will reconnect only on demand from within
220 for (values %seek_and_destroy) {
222 $_->{_dbh_gen}++; # so that existing cursors will drop as well
225 $_->transaction_depth(0);
234 # some databases spew warnings on implicit disconnect
236 local $SIG{__WARN__} = sub {};
239 # this op is necessary, since the very last perl runtime statement
240 # triggers a global destruction shootout, and the $SIG localization
241 # may very well be destroyed before perl actually gets to do the
246 # handle pid changes correctly - do not destroy parent's connection
250 my $pid = $self->_conn_pid;
251 if( defined $pid and $pid != $$ and my $dbh = $self->_dbh ) {
252 $dbh->{InactiveDestroy} = 1;
255 $self->transaction_depth(0);
256 $self->savepoints([]);
264 This method is normally called by L<DBIx::Class::Schema/connection>, which
265 encapsulates its argument list in an arrayref before passing them here.
267 The argument list may contain:
273 The same 4-element argument set one would normally pass to
274 L<DBI/connect>, optionally followed by
275 L<extra attributes|/DBIx::Class specific connection attributes>
276 recognized by DBIx::Class:
278 $connect_info_args = [ $dsn, $user, $password, \%dbi_attributes?, \%extra_attributes? ];
282 A single code reference which returns a connected
283 L<DBI database handle|DBI/connect> optionally followed by
284 L<extra attributes|/DBIx::Class specific connection attributes> recognized
287 $connect_info_args = [ sub { DBI->connect (...) }, \%extra_attributes? ];
291 A single hashref with all the attributes and the dsn/user/password
294 $connect_info_args = [{
302 $connect_info_args = [{
303 dbh_maker => sub { DBI->connect (...) },
308 This is particularly useful for L<Catalyst> based applications, allowing the
309 following config (L<Config::General> style):
314 dsn dbi:mysql:database=test
321 The C<dsn>/C<user>/C<password> combination can be substituted by the
322 C<dbh_maker> key whose value is a coderef that returns a connected
323 L<DBI database handle|DBI/connect>
327 Please note that the L<DBI> docs recommend that you always explicitly
328 set C<AutoCommit> to either I<0> or I<1>. L<DBIx::Class> further
329 recommends that it be set to I<1>, and that you perform transactions
330 via our L<DBIx::Class::Schema/txn_do> method. L<DBIx::Class> will set it
331 to I<1> if you do not do explicitly set it to zero. This is the default
332 for most DBDs. See L</DBIx::Class and AutoCommit> for details.
334 =head3 DBIx::Class specific connection attributes
336 In addition to the standard L<DBI|DBI/ATTRIBUTES COMMON TO ALL HANDLES>
337 L<connection|DBI/Database Handle Attributes> attributes, DBIx::Class recognizes
338 the following connection options. These options can be mixed in with your other
339 L<DBI> connection attributes, or placed in a separate hashref
340 (C<\%extra_attributes>) as shown above.
342 Every time C<connect_info> is invoked, any previous settings for
343 these options will be cleared before setting the new ones, regardless of
344 whether any options are specified in the new C<connect_info>.
351 Specifies things to do immediately after connecting or re-connecting to
352 the database. Its value may contain:
358 This contains one SQL statement to execute.
360 =item an array reference
362 This contains SQL statements to execute in order. Each element contains
363 a string or a code reference that returns a string.
365 =item a code reference
367 This contains some code to execute. Unlike code references within an
368 array reference, its return value is ignored.
372 =item on_disconnect_do
374 Takes arguments in the same form as L</on_connect_do> and executes them
375 immediately before disconnecting from the database.
377 Note, this only runs if you explicitly call L</disconnect> on the
380 =item on_connect_call
382 A more generalized form of L</on_connect_do> that calls the specified
383 C<connect_call_METHOD> methods in your storage driver.
385 on_connect_do => 'select 1'
389 on_connect_call => [ [ do_sql => 'select 1' ] ]
391 Its values may contain:
397 Will call the C<connect_call_METHOD> method.
399 =item a code reference
401 Will execute C<< $code->($storage) >>
403 =item an array reference
405 Each value can be a method name or code reference.
407 =item an array of arrays
409 For each array, the first item is taken to be the C<connect_call_> method name
410 or code reference, and the rest are parameters to it.
414 Some predefined storage methods you may use:
420 Executes a SQL string or a code reference that returns a SQL string. This is
421 what L</on_connect_do> and L</on_disconnect_do> use.
429 Will execute the scalar as SQL.
433 Taken to be arguments to L<DBI/do>, the SQL string optionally followed by the
434 attributes hashref and bind values.
436 =item a code reference
438 Will execute C<< $code->($storage) >> and execute the return array refs as
445 Execute any statements necessary to initialize the database session to return
446 and accept datetime/timestamp values used with
447 L<DBIx::Class::InflateColumn::DateTime>.
449 Only necessary for some databases, see your specific storage driver for
450 implementation details.
454 =item on_disconnect_call
456 Takes arguments in the same form as L</on_connect_call> and executes them
457 immediately before disconnecting from the database.
459 Calls the C<disconnect_call_METHOD> methods as opposed to the
460 C<connect_call_METHOD> methods called by L</on_connect_call>.
462 Note, this only runs if you explicitly call L</disconnect> on the
465 =item disable_sth_caching
467 If set to a true value, this option will disable the caching of
468 statement handles via L<DBI/prepare_cached>.
472 Sets a specific SQL::Abstract::Limit-style limit dialect, overriding the
473 default L</sql_limit_dialect> setting of the storage (if any). For a list
474 of available limit dialects see L<DBIx::Class::SQLMaker::LimitDialects>.
478 When true automatically sets L</quote_char> and L</name_sep> to the characters
479 appropriate for your particular RDBMS. This option is preferred over specifying
480 L</quote_char> directly.
484 Specifies what characters to use to quote table and column names.
486 C<quote_char> expects either a single character, in which case is it
487 is placed on either side of the table/column name, or an arrayref of length
488 2 in which case the table/column name is placed between the elements.
490 For example under MySQL you should use C<< quote_char => '`' >>, and for
491 SQL Server you should use C<< quote_char => [qw/[ ]/] >>.
495 This parameter is only useful in conjunction with C<quote_char>, and is used to
496 specify the character that separates elements (schemas, tables, columns) from
497 each other. If unspecified it defaults to the most commonly used C<.>.
501 This Storage driver normally installs its own C<HandleError>, sets
502 C<RaiseError> and C<ShowErrorStatement> on, and sets C<PrintError> off on
503 all database handles, including those supplied by a coderef. It does this
504 so that it can have consistent and useful error behavior.
506 If you set this option to a true value, Storage will not do its usual
507 modifications to the database handle's attributes, and instead relies on
508 the settings in your connect_info DBI options (or the values you set in
509 your connection coderef, in the case that you are connecting via coderef).
511 Note that your custom settings can cause Storage to malfunction,
512 especially if you set a C<HandleError> handler that suppresses exceptions
513 and/or disable C<RaiseError>.
517 If this option is true, L<DBIx::Class> will use savepoints when nesting
518 transactions, making it possible to recover from failure in the inner
519 transaction without having to abort all outer transactions.
523 Use this argument to supply a cursor class other than the default
524 L<DBIx::Class::Storage::DBI::Cursor>.
528 Some real-life examples of arguments to L</connect_info> and
529 L<DBIx::Class::Schema/connect>
531 # Simple SQLite connection
532 ->connect_info([ 'dbi:SQLite:./foo.db' ]);
535 ->connect_info([ sub { DBI->connect(...) } ]);
537 # Connect via subref in hashref
539 dbh_maker => sub { DBI->connect(...) },
540 on_connect_do => 'alter session ...',
543 # A bit more complicated
550 { quote_char => q{"} },
554 # Equivalent to the previous example
560 { AutoCommit => 1, quote_char => q{"}, name_sep => q{.} },
564 # Same, but with hashref as argument
565 # See parse_connect_info for explanation
568 dsn => 'dbi:Pg:dbname=foo',
570 password => 'my_pg_password',
577 # Subref + DBIx::Class-specific connection options
580 sub { DBI->connect(...) },
584 on_connect_do => ['SET search_path TO myschema,otherschema,public'],
585 disable_sth_caching => 1,
595 my ($self, $info) = @_;
597 return $self->_connect_info if !$info;
599 $self->_connect_info($info); # copy for _connect_info
601 $info = $self->_normalize_connect_info($info)
602 if ref $info eq 'ARRAY';
604 for my $storage_opt (keys %{ $info->{storage_options} }) {
605 my $value = $info->{storage_options}{$storage_opt};
607 $self->$storage_opt($value);
610 # Kill sql_maker/_sql_maker_opts, so we get a fresh one with only
611 # the new set of options
612 $self->_sql_maker(undef);
613 $self->_sql_maker_opts({});
615 for my $sql_maker_opt (keys %{ $info->{sql_maker_options} }) {
616 my $value = $info->{sql_maker_options}{$sql_maker_opt};
618 $self->_sql_maker_opts->{$sql_maker_opt} = $value;
622 %{ $self->_default_dbi_connect_attributes || {} },
623 %{ $info->{attributes} || {} },
626 my @args = @{ $info->{arguments} };
628 if (keys %attrs and ref $args[0] ne 'CODE') {
630 'You provided explicit AutoCommit => 0 in your connection_info. '
631 . 'This is almost universally a bad idea (see the footnotes of '
632 . 'DBIx::Class::Storage::DBI for more info). If you still want to '
633 . 'do this you can set $ENV{DBIC_UNSAFE_AUTOCOMMIT_OK} to disable '
635 if ! $attrs{AutoCommit} and ! $ENV{DBIC_UNSAFE_AUTOCOMMIT_OK};
637 push @args, \%attrs if keys %attrs;
639 $self->_dbi_connect_info(\@args);
642 # save attributes them in a separate accessor so they are always
643 # introspectable, even in case of a CODE $dbhmaker
644 $self->_dbic_connect_attributes (\%attrs);
646 return $self->_connect_info;
649 sub _normalize_connect_info {
650 my ($self, $info_arg) = @_;
653 my @args = @$info_arg; # take a shallow copy for further mutilation
655 # combine/pre-parse arguments depending on invocation style
658 if (ref $args[0] eq 'CODE') { # coderef with optional \%extra_attributes
659 %attrs = %{ $args[1] || {} };
662 elsif (ref $args[0] eq 'HASH') { # single hashref (i.e. Catalyst config)
663 %attrs = %{$args[0]};
665 if (my $code = delete $attrs{dbh_maker}) {
668 my @ignored = grep { delete $attrs{$_} } (qw/dsn user password/);
671 'Attribute(s) %s in connect_info were ignored, as they can not be applied '
672 . "to the result of 'dbh_maker'",
674 join (', ', map { "'$_'" } (@ignored) ),
679 @args = delete @attrs{qw/dsn user password/};
682 else { # otherwise assume dsn/user/password + \%attrs + \%extra_attrs
684 % { $args[3] || {} },
685 % { $args[4] || {} },
687 @args = @args[0,1,2];
690 $info{arguments} = \@args;
692 my @storage_opts = grep exists $attrs{$_},
693 @storage_options, 'cursor_class';
695 @{ $info{storage_options} }{@storage_opts} =
696 delete @attrs{@storage_opts} if @storage_opts;
698 my @sql_maker_opts = grep exists $attrs{$_},
699 qw/limit_dialect quote_char name_sep quote_names/;
701 @{ $info{sql_maker_options} }{@sql_maker_opts} =
702 delete @attrs{@sql_maker_opts} if @sql_maker_opts;
704 $info{attributes} = \%attrs if %attrs;
709 sub _default_dbi_connect_attributes () {
714 ShowErrorStatement => 1,
720 This method is deprecated in favour of setting via L</connect_info>.
724 =head2 on_disconnect_do
726 This method is deprecated in favour of setting via L</connect_info>.
730 sub _parse_connect_do {
731 my ($self, $type) = @_;
733 my $val = $self->$type;
734 return () if not defined $val;
739 push @res, [ 'do_sql', $val ];
740 } elsif (ref($val) eq 'CODE') {
742 } elsif (ref($val) eq 'ARRAY') {
743 push @res, map { [ 'do_sql', $_ ] } @$val;
745 $self->throw_exception("Invalid type for $type: ".ref($val));
753 Arguments: ($subref | $method_name), @extra_coderef_args?
755 Execute the given $subref or $method_name using the new exception-based
756 connection management.
758 The first two arguments will be the storage object that C<dbh_do> was called
759 on and a database handle to use. Any additional arguments will be passed
760 verbatim to the called subref as arguments 2 and onwards.
762 Using this (instead of $self->_dbh or $self->dbh) ensures correct
763 exception handling and reconnection (or failover in future subclasses).
765 Your subref should have no side-effects outside of the database, as
766 there is the potential for your subref to be partially double-executed
767 if the database connection was stale/dysfunctional.
771 my @stuff = $schema->storage->dbh_do(
773 my ($storage, $dbh, @cols) = @_;
774 my $cols = join(q{, }, @cols);
775 $dbh->selectrow_array("SELECT $cols FROM foo");
784 my $run_target = shift;
786 # short circuit when we know there is no need for a runner
788 # FIXME - asumption may be wrong
789 # the rationale for the txn_depth check is that if this block is a part
790 # of a larger transaction, everything up to that point is screwed anyway
791 return $self->$run_target($self->_get_dbh, @_)
792 if $self->{_in_do_block} or $self->transaction_depth;
796 DBIx::Class::Storage::BlockRunner->new(
798 run_code => sub { $self->$run_target ($self->_get_dbh, @$args ) },
800 retry_handler => sub { ! ( $_[0]->retried_count or $_[0]->storage->connected ) },
805 $_[0]->_get_dbh; # connects or reconnects on pid change, necessary to grab correct txn_depth
806 shift->next::method(@_);
811 Our C<disconnect> method also performs a rollback first if the
812 database is not in C<AutoCommit> mode.
822 push @actions, ( $self->on_disconnect_call || () );
823 push @actions, $self->_parse_connect_do ('on_disconnect_do');
825 $self->_do_connection_actions(disconnect_call_ => $_) for @actions;
827 # stops the "implicit rollback on disconnect" warning
828 $self->_exec_txn_rollback unless $self->_dbh_autocommit;
830 %{ $self->_dbh->{CachedKids} } = ();
831 $self->_dbh->disconnect;
837 =head2 with_deferred_fk_checks
841 =item Arguments: C<$coderef>
843 =item Return Value: The return value of $coderef
847 Storage specific method to run the code ref with FK checks deferred or
848 in MySQL's case disabled entirely.
852 # Storage subclasses should override this
853 sub with_deferred_fk_checks {
854 my ($self, $sub) = @_;
862 =item Arguments: none
864 =item Return Value: 1|0
868 Verifies that the current database handle is active and ready to execute
869 an SQL statement (e.g. the connection did not get stale, server is still
870 answering, etc.) This method is used internally by L</dbh>.
876 return 0 unless $self->_seems_connected;
879 local $self->_dbh->{RaiseError} = 1;
884 sub _seems_connected {
889 my $dbh = $self->_dbh
892 return $dbh->FETCH('Active');
898 my $dbh = $self->_dbh or return 0;
903 sub ensure_connected {
906 unless ($self->connected) {
907 $self->_populate_dbh;
913 Returns a C<$dbh> - a data base handle of class L<DBI>. The returned handle
914 is guaranteed to be healthy by implicitly calling L</connected>, and if
915 necessary performing a reconnection before returning. Keep in mind that this
916 is very B<expensive> on some database engines. Consider using L</dbh_do>
924 if (not $self->_dbh) {
925 $self->_populate_dbh;
927 $self->ensure_connected;
932 # this is the internal "get dbh or connect (don't check)" method
936 $self->_populate_dbh unless $self->_dbh;
942 unless ($self->_sql_maker) {
943 my $sql_maker_class = $self->sql_maker_class;
945 my %opts = %{$self->_sql_maker_opts||{}};
949 $self->sql_limit_dialect
952 my $s_class = (ref $self) || $self;
954 "Your storage class ($s_class) does not set sql_limit_dialect and you "
955 . 'have not supplied an explicit limit_dialect in your connection_info. '
956 . 'DBIC will attempt to use the GenericSubQ dialect, which works on most '
957 . 'databases but can be (and often is) painfully slow. '
958 . "Please file an RT ticket against '$s_class' ."
965 my ($quote_char, $name_sep);
967 if ($opts{quote_names}) {
968 $quote_char = (delete $opts{quote_char}) || $self->sql_quote_char || do {
969 my $s_class = (ref $self) || $self;
971 "You requested 'quote_names' but your storage class ($s_class) does "
972 . 'not explicitly define a default sql_quote_char and you have not '
973 . 'supplied a quote_char as part of your connection_info. DBIC will '
974 .q{default to the ANSI SQL standard quote '"', which works most of }
975 . "the time. Please file an RT ticket against '$s_class'."
981 $name_sep = (delete $opts{name_sep}) || $self->sql_name_sep;
984 $self->_sql_maker($sql_maker_class->new(
986 array_datatypes => 1,
987 limit_dialect => $dialect,
988 ($quote_char ? (quote_char => $quote_char) : ()),
989 name_sep => ($name_sep || '.'),
993 return $self->_sql_maker;
996 # nothing to do by default
1003 my @info = @{$self->_dbi_connect_info || []};
1004 $self->_dbh(undef); # in case ->connected failed we might get sent here
1005 $self->_dbh_details({}); # reset everything we know
1007 $self->_dbh($self->_connect(@info));
1009 $self->_conn_pid($$) if $^O ne 'MSWin32'; # on win32 these are in fact threads
1011 $self->_determine_driver;
1013 # Always set the transaction depth on connect, since
1014 # there is no transaction in progress by definition
1015 $self->{transaction_depth} = $self->_dbh_autocommit ? 0 : 1;
1017 $self->_run_connection_actions unless $self->{_in_determine_driver};
1020 sub _run_connection_actions {
1024 push @actions, ( $self->on_connect_call || () );
1025 push @actions, $self->_parse_connect_do ('on_connect_do');
1027 $self->_do_connection_actions(connect_call_ => $_) for @actions;
1032 sub set_use_dbms_capability {
1033 $_[0]->set_inherited ($_[1], $_[2]);
1036 sub get_use_dbms_capability {
1037 my ($self, $capname) = @_;
1039 my $use = $self->get_inherited ($capname);
1042 : do { $capname =~ s/^_use_/_supports_/; $self->get_dbms_capability ($capname) }
1046 sub set_dbms_capability {
1047 $_[0]->_dbh_details->{capability}{$_[1]} = $_[2];
1050 sub get_dbms_capability {
1051 my ($self, $capname) = @_;
1053 my $cap = $self->_dbh_details->{capability}{$capname};
1055 unless (defined $cap) {
1056 if (my $meth = $self->can ("_determine$capname")) {
1057 $cap = $self->$meth ? 1 : 0;
1063 $self->set_dbms_capability ($capname, $cap);
1073 unless ($info = $self->_dbh_details->{info}) {
1077 my $server_version = try { $self->_get_server_version };
1079 if (defined $server_version) {
1080 $info->{dbms_version} = $server_version;
1082 my ($numeric_version) = $server_version =~ /^([\d\.]+)/;
1083 my @verparts = split (/\./, $numeric_version);
1089 # consider only up to 3 version parts, iff not more than 3 digits
1091 while (@verparts && @use_parts < 3) {
1092 my $p = shift @verparts;
1094 push @use_parts, $p;
1096 push @use_parts, 0 while @use_parts < 3;
1098 $info->{normalized_dbms_version} = sprintf "%d.%03d%03d", @use_parts;
1102 $self->_dbh_details->{info} = $info;
1108 sub _get_server_version {
1109 shift->_dbh_get_info(18);
1113 my ($self, $info) = @_;
1115 return try { $self->_get_dbh->get_info($info) } || undef;
1118 sub _determine_driver {
1121 if ((not $self->_driver_determined) && (not $self->{_in_determine_driver})) {
1122 my $started_connected = 0;
1123 local $self->{_in_determine_driver} = 1;
1125 if (ref($self) eq __PACKAGE__) {
1127 if ($self->_dbh) { # we are connected
1128 $driver = $self->_dbh->{Driver}{Name};
1129 $started_connected = 1;
1131 # if connect_info is a CODEREF, we have no choice but to connect
1132 if (ref $self->_dbi_connect_info->[0] &&
1133 reftype $self->_dbi_connect_info->[0] eq 'CODE') {
1134 $self->_populate_dbh;
1135 $driver = $self->_dbh->{Driver}{Name};
1138 # try to use dsn to not require being connected, the driver may still
1139 # force a connection in _rebless to determine version
1140 # (dsn may not be supplied at all if all we do is make a mock-schema)
1141 my $dsn = $self->_dbi_connect_info->[0] || $ENV{DBI_DSN} || '';
1142 ($driver) = $dsn =~ /dbi:([^:]+):/i;
1143 $driver ||= $ENV{DBI_DRIVER};
1148 my $storage_class = "DBIx::Class::Storage::DBI::${driver}";
1149 if ($self->load_optional_class($storage_class)) {
1150 mro::set_mro($storage_class, 'c3');
1151 bless $self, $storage_class;
1157 $self->_driver_determined(1);
1159 Class::C3->reinitialize() if DBIx::Class::_ENV_::OLD_MRO;
1161 $self->_init; # run driver-specific initializations
1163 $self->_run_connection_actions
1164 if !$started_connected && defined $self->_dbh;
1168 sub _do_connection_actions {
1170 my $method_prefix = shift;
1173 if (not ref($call)) {
1174 my $method = $method_prefix . $call;
1176 } elsif (ref($call) eq 'CODE') {
1178 } elsif (ref($call) eq 'ARRAY') {
1179 if (ref($call->[0]) ne 'ARRAY') {
1180 $self->_do_connection_actions($method_prefix, $_) for @$call;
1182 $self->_do_connection_actions($method_prefix, @$_) for @$call;
1185 $self->throw_exception (sprintf ("Don't know how to process conection actions of type '%s'", ref($call)) );
1191 sub connect_call_do_sql {
1193 $self->_do_query(@_);
1196 sub disconnect_call_do_sql {
1198 $self->_do_query(@_);
1201 # override in db-specific backend when necessary
1202 sub connect_call_datetime_setup { 1 }
1205 my ($self, $action) = @_;
1207 if (ref $action eq 'CODE') {
1208 $action = $action->($self);
1209 $self->_do_query($_) foreach @$action;
1212 # Most debuggers expect ($sql, @bind), so we need to exclude
1213 # the attribute hash which is the second argument to $dbh->do
1214 # furthermore the bind values are usually to be presented
1215 # as named arrayref pairs, so wrap those here too
1216 my @do_args = (ref $action eq 'ARRAY') ? (@$action) : ($action);
1217 my $sql = shift @do_args;
1218 my $attrs = shift @do_args;
1219 my @bind = map { [ undef, $_ ] } @do_args;
1222 $_[0]->_query_start($sql, \@bind);
1223 $_[1]->do($sql, $attrs, @do_args);
1224 $_[0]->_query_end($sql, \@bind);
1232 my ($self, @info) = @_;
1234 $self->throw_exception("You failed to provide any connection info")
1237 my ($old_connect_via, $dbh);
1239 local $DBI::connect_via = 'connect' if $INC{'Apache/DBI.pm'} && $ENV{MOD_PERL};
1242 if(ref $info[0] eq 'CODE') {
1243 $dbh = $info[0]->();
1247 $dbh = DBI->connect(@info);
1254 unless ($self->unsafe) {
1256 $self->throw_exception(
1257 'Refusing clobbering of {HandleError} installed on externally supplied '
1258 ."DBI handle $dbh. Either remove the handler or use the 'unsafe' attribute."
1259 ) if $dbh->{HandleError} and ref $dbh->{HandleError} ne '__DBIC__DBH__ERROR__HANDLER__';
1261 # Default via _default_dbi_connect_attributes is 1, hence it was an explicit
1262 # request, or an external handle. Complain and set anyway
1263 unless ($dbh->{RaiseError}) {
1264 carp( ref $info[0] eq 'CODE'
1266 ? "The 'RaiseError' of the externally supplied DBI handle is set to false. "
1267 ."DBIx::Class will toggle it back to true, unless the 'unsafe' connect "
1268 .'attribute has been supplied'
1270 : 'RaiseError => 0 supplied in your connection_info, without an explicit '
1271 .'unsafe => 1. Toggling RaiseError back to true'
1274 $dbh->{RaiseError} = 1;
1277 # this odd anonymous coderef dereference is in fact really
1278 # necessary to avoid the unwanted effect described in perl5
1281 my $weak_self = $_[0];
1284 # the coderef is blessed so we can distinguish it from externally
1285 # supplied handles (which must be preserved)
1286 $_[1]->{HandleError} = bless sub {
1288 $weak_self->throw_exception("DBI Exception: $_[0]");
1291 # the handler may be invoked by something totally out of
1293 DBIx::Class::Exception->throw("DBI Exception (unhandled by DBIC, ::Schema GCed): $_[0]");
1295 }, '__DBIC__DBH__ERROR__HANDLER__';
1300 $self->throw_exception("DBI Connection failed: $_")
1303 $self->_dbh_autocommit($dbh->{AutoCommit});
1310 # this means we have not yet connected and do not know the AC status
1311 # (e.g. coderef $dbh), need a full-fledged connection check
1312 if (! defined $self->_dbh_autocommit) {
1313 $self->ensure_connected;
1315 # Otherwise simply connect or re-connect on pid changes
1320 $self->next::method(@_);
1323 sub _exec_txn_begin {
1326 # if the user is utilizing txn_do - good for him, otherwise we need to
1327 # ensure that the $dbh is healthy on BEGIN.
1328 # We do this via ->dbh_do instead of ->dbh, so that the ->dbh "ping"
1329 # will be replaced by a failure of begin_work itself (which will be
1330 # then retried on reconnect)
1331 if ($self->{_in_do_block}) {
1332 $self->_dbh->begin_work;
1334 $self->dbh_do(sub { $_[1]->begin_work });
1341 $self->_verify_pid if $self->_dbh;
1342 $self->throw_exception("Unable to txn_commit() on a disconnected storage")
1345 # esoteric case for folks using external $dbh handles
1346 if (! $self->transaction_depth and ! $self->_dbh->FETCH('AutoCommit') ) {
1347 carp "Storage transaction_depth 0 does not match "
1348 ."false AutoCommit of $self->{_dbh}, attempting COMMIT anyway";
1349 $self->transaction_depth(1);
1352 $self->next::method(@_);
1354 # if AutoCommit is disabled txn_depth never goes to 0
1355 # as a new txn is started immediately on commit
1356 $self->transaction_depth(1) if (
1357 !$self->transaction_depth
1359 defined $self->_dbh_autocommit
1361 ! $self->_dbh_autocommit
1365 sub _exec_txn_commit {
1366 shift->_dbh->commit;
1372 $self->_verify_pid if $self->_dbh;
1373 $self->throw_exception("Unable to txn_rollback() on a disconnected storage")
1376 # esoteric case for folks using external $dbh handles
1377 if (! $self->transaction_depth and ! $self->_dbh->FETCH('AutoCommit') ) {
1378 carp "Storage transaction_depth 0 does not match "
1379 ."false AutoCommit of $self->{_dbh}, attempting ROLLBACK anyway";
1380 $self->transaction_depth(1);
1383 $self->next::method(@_);
1385 # if AutoCommit is disabled txn_depth never goes to 0
1386 # as a new txn is started immediately on commit
1387 $self->transaction_depth(1) if (
1388 !$self->transaction_depth
1390 defined $self->_dbh_autocommit
1392 ! $self->_dbh_autocommit
1396 sub _exec_txn_rollback {
1397 shift->_dbh->rollback;
1400 # generate some identical methods
1401 for my $meth (qw/svp_begin svp_release svp_rollback/) {
1403 *{__PACKAGE__ ."::$meth"} = subname $meth => sub {
1405 $self->_verify_pid if $self->_dbh;
1406 $self->throw_exception("Unable to $meth() on a disconnected storage")
1408 $self->next::method(@_);
1412 # This used to be the top-half of _execute. It was split out to make it
1413 # easier to override in NoBindVars without duping the rest. It takes up
1414 # all of _execute's args, and emits $sql, @bind.
1415 sub _prep_for_execute {
1416 #my ($self, $op, $ident, $args) = @_;
1417 return shift->_gen_sql_bind(@_)
1421 my ($self, $op, $ident, $args) = @_;
1423 my ($sql, @bind) = $self->sql_maker->$op(
1424 blessed($ident) ? $ident->from : $ident,
1429 ! $ENV{DBIC_DT_SEARCH_OK}
1433 first { blessed($_->[1]) && $_->[1]->isa('DateTime') } @bind
1435 carp_unique 'DateTime objects passed to search() are not supported '
1436 . 'properly (InflateColumn::DateTime formats and settings are not '
1437 . 'respected.) See "Formatting DateTime objects in queries" in '
1438 . 'DBIx::Class::Manual::Cookbook. To disable this warning for good '
1439 . 'set $ENV{DBIC_DT_SEARCH_OK} to true'
1442 return( $sql, $self->_resolve_bindattrs(
1443 $ident, [ @{$args->[2]{bind}||[]}, @bind ]
1447 sub _resolve_bindattrs {
1448 my ($self, $ident, $bind, $colinfos) = @_;
1452 my $resolve_bindinfo = sub {
1453 #my $infohash = shift;
1455 %$colinfos = %{ $self->_resolve_column_info($ident) }
1456 unless keys %$colinfos;
1459 if (my $col = $_[0]->{dbic_colname}) {
1460 $ret = { %{$_[0]} };
1462 $ret->{sqlt_datatype} ||= $colinfos->{$col}{data_type}
1463 if $colinfos->{$col}{data_type};
1465 $ret->{sqlt_size} ||= $colinfos->{$col}{size}
1466 if $colinfos->{$col}{size};
1473 if (ref $_ ne 'ARRAY') {
1476 elsif (! defined $_->[0]) {
1479 elsif (ref $_->[0] eq 'HASH') {
1481 ($_->[0]{dbd_attrs} or $_->[0]{sqlt_datatype}) ? $_->[0] : $resolve_bindinfo->($_->[0]),
1485 elsif (ref $_->[0] eq 'SCALAR') {
1486 [ { sqlt_datatype => ${$_->[0]} }, $_->[1] ]
1489 [ $resolve_bindinfo->({ dbic_colname => $_->[0] }), $_->[1] ]
1494 sub _format_for_trace {
1495 #my ($self, $bind) = @_;
1497 ### Turn @bind from something like this:
1498 ### ( [ "artist", 1 ], [ \%attrs, 3 ] )
1500 ### ( "'1'", "'3'" )
1503 defined( $_ && $_->[1] )
1510 my ( $self, $sql, $bind ) = @_;
1512 $self->debugobj->query_start( $sql, $self->_format_for_trace($bind) )
1517 my ( $self, $sql, $bind ) = @_;
1519 $self->debugobj->query_end( $sql, $self->_format_for_trace($bind) )
1524 sub _dbi_attrs_for_bind {
1525 my ($self, $ident, $bind) = @_;
1527 if (! defined $sba_compat) {
1528 $self->_determine_driver;
1529 $sba_compat = $self->can('source_bind_attributes') == \&source_bind_attributes
1537 my $class = ref $self;
1539 "The source_bind_attributes() override in $class relies on a deprecated codepath. "
1540 .'You are strongly advised to switch your code to override bind_attribute_by_datatype() '
1541 .'instead. This legacy compat shim will also disappear some time before DBIC 0.09'
1544 my $sba_attrs = $self->source_bind_attributes
1549 for (map { $_->[0] } @$bind) {
1551 if (exists $_->{dbd_attrs}) {
1554 elsif($_->{sqlt_datatype}) {
1555 # cache the result in the dbh_details hash, as it can not change unless
1556 # we connect to something else
1557 my $cache = $self->_dbh_details->{_datatype_map_cache} ||= {};
1558 if (not exists $cache->{$_->{sqlt_datatype}}) {
1559 $cache->{$_->{sqlt_datatype}} = $self->bind_attribute_by_data_type($_->{sqlt_datatype}) || undef;
1561 $cache->{$_->{sqlt_datatype}};
1563 elsif ($sba_attrs and $_->{dbic_colname}) {
1564 $sba_attrs->{$_->{dbic_colname}} || undef;
1567 undef; # always push something at this position
1576 my ($self, $op, $ident, @args) = @_;
1578 my ($sql, $bind) = $self->_prep_for_execute($op, $ident, \@args);
1580 shift->dbh_do( # retry over disconnects
1584 $self->_dbi_attrs_for_bind($ident, $bind)
1589 my ($self, undef, $sql, $bind, $bind_attrs) = @_;
1591 $self->_query_start( $sql, $bind );
1592 my $sth = $self->_sth($sql);
1594 for my $i (0 .. $#$bind) {
1595 if (ref $bind->[$i][1] eq 'SCALAR') { # any scalarrefs are assumed to be bind_inouts
1596 $sth->bind_param_inout(
1597 $i + 1, # bind params counts are 1-based
1599 $bind->[$i][0]{dbd_size} || $self->_max_column_bytesize($bind->[$i][0]), # size
1606 (ref $bind->[$i][1] and overload::Method($bind->[$i][1], '""'))
1615 # Can this fail without throwing an exception anyways???
1616 my $rv = $sth->execute();
1617 $self->throw_exception(
1618 $sth->errstr || $sth->err || 'Unknown error: execute() returned false, but error flags were not set...'
1621 $self->_query_end( $sql, $bind );
1623 return (wantarray ? ($rv, $sth, @$bind) : $rv);
1626 sub _prefetch_autovalues {
1627 my ($self, $source, $to_insert) = @_;
1629 my $colinfo = $source->columns_info;
1632 for my $col (keys %$colinfo) {
1634 $colinfo->{$col}{auto_nextval}
1637 ! exists $to_insert->{$col}
1639 ref $to_insert->{$col} eq 'SCALAR'
1641 (ref $to_insert->{$col} eq 'REF' and ref ${$to_insert->{$col}} eq 'ARRAY')
1644 $values{$col} = $self->_sequence_fetch(
1646 ( $colinfo->{$col}{sequence} ||=
1647 $self->_dbh_get_autoinc_seq($self->_get_dbh, $source, $col)
1657 my ($self, $source, $to_insert) = @_;
1659 my $prefetched_values = $self->_prefetch_autovalues($source, $to_insert);
1661 # fuse the values, but keep a separate list of prefetched_values so that
1662 # they can be fused once again with the final return
1663 $to_insert = { %$to_insert, %$prefetched_values };
1665 # FIXME - we seem to assume undef values as non-supplied. This is wrong.
1666 # Investigate what does it take to s/defined/exists/
1667 my $col_infos = $source->columns_info;
1668 my %pcols = map { $_ => 1 } $source->primary_columns;
1669 my (%retrieve_cols, $autoinc_supplied, $retrieve_autoinc_col);
1670 for my $col ($source->columns) {
1671 if ($col_infos->{$col}{is_auto_increment}) {
1672 $autoinc_supplied ||= 1 if defined $to_insert->{$col};
1673 $retrieve_autoinc_col ||= $col unless $autoinc_supplied;
1676 # nothing to retrieve when explicit values are supplied
1677 next if (defined $to_insert->{$col} and ! (
1678 ref $to_insert->{$col} eq 'SCALAR'
1680 (ref $to_insert->{$col} eq 'REF' and ref ${$to_insert->{$col}} eq 'ARRAY')
1683 # the 'scalar keys' is a trick to preserve the ->columns declaration order
1684 $retrieve_cols{$col} = scalar keys %retrieve_cols if (
1687 $col_infos->{$col}{retrieve_on_insert}
1691 local $self->{_autoinc_supplied_for_op} = $autoinc_supplied;
1692 local $self->{_perform_autoinc_retrieval} = $retrieve_autoinc_col;
1694 my ($sqla_opts, @ir_container);
1695 if (%retrieve_cols and $self->_use_insert_returning) {
1696 $sqla_opts->{returning_container} = \@ir_container
1697 if $self->_use_insert_returning_bound;
1699 $sqla_opts->{returning} = [
1700 sort { $retrieve_cols{$a} <=> $retrieve_cols{$b} } keys %retrieve_cols
1704 my ($rv, $sth) = $self->_execute('insert', $source, $to_insert, $sqla_opts);
1706 my %returned_cols = %$to_insert;
1707 if (my $retlist = $sqla_opts->{returning}) { # if IR is supported - we will get everything in one set
1708 @ir_container = try {
1709 local $SIG{__WARN__} = sub {};
1710 my @r = $sth->fetchrow_array;
1713 } unless @ir_container;
1715 @returned_cols{@$retlist} = @ir_container if @ir_container;
1718 # pull in PK if needed and then everything else
1719 if (my @missing_pri = grep { $pcols{$_} } keys %retrieve_cols) {
1721 $self->throw_exception( "Missing primary key but Storage doesn't support last_insert_id" )
1722 unless $self->can('last_insert_id');
1724 my @pri_values = $self->last_insert_id($source, @missing_pri);
1726 $self->throw_exception( "Can't get last insert id" )
1727 unless (@pri_values == @missing_pri);
1729 @returned_cols{@missing_pri} = @pri_values;
1730 delete $retrieve_cols{$_} for @missing_pri;
1733 # if there is more left to pull
1734 if (%retrieve_cols) {
1735 $self->throw_exception(
1736 'Unable to retrieve additional columns without a Primary Key on ' . $source->source_name
1739 my @left_to_fetch = sort { $retrieve_cols{$a} <=> $retrieve_cols{$b} } keys %retrieve_cols;
1741 my $cur = DBIx::Class::ResultSet->new($source, {
1742 where => { map { $_ => $returned_cols{$_} } (keys %pcols) },
1743 select => \@left_to_fetch,
1746 @returned_cols{@left_to_fetch} = $cur->next;
1748 $self->throw_exception('Duplicate row returned for PK-search after fresh insert')
1749 if scalar $cur->next;
1753 return { %$prefetched_values, %returned_cols };
1757 my ($self, $source, $cols, $data) = @_;
1759 my @col_range = (0..$#$cols);
1761 # FIXME - perhaps this is not even needed? does DBI stringify?
1763 # forcibly stringify whatever is stringifiable
1764 # ResultSet::populate() hands us a copy - safe to mangle
1765 for my $r (0 .. $#$data) {
1766 for my $c (0 .. $#{$data->[$r]}) {
1767 $data->[$r][$c] = "$data->[$r][$c]"
1768 if ( ref $data->[$r][$c] and overload::Method($data->[$r][$c], '""') );
1772 my $colinfos = $source->columns_info($cols);
1774 local $self->{_autoinc_supplied_for_op} =
1775 (first { $_->{is_auto_increment} } values %$colinfos)
1780 # get a slice type index based on first row of data
1781 # a "column" in this context may refer to more than one bind value
1782 # e.g. \[ '?, ?', [...], [...] ]
1784 # construct the value type index - a description of values types for every
1785 # per-column slice of $data:
1787 # nonexistent - nonbind literal
1789 # [] of bindattrs - resolved attribute(s) of bind(s) passed via literal+bind \[] combo
1791 # also construct the column hash to pass to the SQL generator. For plain
1792 # (non literal) values - convert the members of the first row into a
1793 # literal+bind combo, with extra positional info in the bind attr hashref.
1794 # This will allow us to match the order properly, and is so contrived
1795 # because a user-supplied literal/bind (or something else specific to a
1796 # resultsource and/or storage driver) can inject extra binds along the
1797 # way, so one can't rely on "shift positions" ordering at all. Also we
1798 # can't just hand SQLA a set of some known "values" (e.g. hashrefs that
1799 # can be later matched up by address), because we want to supply a real
1800 # value on which perhaps e.g. datatype checks will be performed
1801 my ($proto_data, $value_type_idx);
1802 for my $i (@col_range) {
1803 my $colname = $cols->[$i];
1804 if (ref $data->[0][$i] eq 'SCALAR') {
1805 # no bind value at all - no type
1807 $proto_data->{$colname} = $data->[0][$i];
1809 elsif (ref $data->[0][$i] eq 'REF' and ref ${$data->[0][$i]} eq 'ARRAY' ) {
1810 # repack, so we don't end up mangling the original \[]
1811 my ($sql, @bind) = @${$data->[0][$i]};
1813 # normalization of user supplied stuff
1814 my $resolved_bind = $self->_resolve_bindattrs(
1815 $source, \@bind, $colinfos,
1818 # store value-less (attrs only) bind info - we will be comparing all
1819 # supplied binds against this for sanity
1820 $value_type_idx->{$i} = [ map { $_->[0] } @$resolved_bind ];
1822 $proto_data->{$colname} = \[ $sql, map { [
1823 # inject slice order to use for $proto_bind construction
1824 { %{$resolved_bind->[$_][0]}, _bind_data_slice_idx => $i }
1826 $resolved_bind->[$_][1]
1831 $value_type_idx->{$i} = 0;
1833 $proto_data->{$colname} = \[ '?', [
1834 { dbic_colname => $colname, _bind_data_slice_idx => $i }
1841 my ($sql, $proto_bind) = $self->_prep_for_execute (
1847 if (! @$proto_bind and keys %$value_type_idx) {
1848 # if the bindlist is empty and we had some dynamic binds, this means the
1849 # storage ate them away (e.g. the NoBindVars component) and interpolated
1850 # them directly into the SQL. This obviously can't be good for multi-inserts
1851 $self->throw_exception('Cannot insert_bulk without support for placeholders');
1855 # FIXME - devise a flag "no babysitting" or somesuch to shut this off
1857 # use an error reporting closure for convenience (less to pass)
1858 my $bad_slice_report_cref = sub {
1859 my ($msg, $r_idx, $c_idx) = @_;
1860 $self->throw_exception(sprintf "%s for column '%s' in populate slice:\n%s",
1864 require Data::Dumper::Concise;
1865 local $Data::Dumper::Maxdepth = 5;
1866 Data::Dumper::Concise::Dumper ({
1867 map { $cols->[$_] =>
1875 for my $col_idx (@col_range) {
1876 my $reference_val = $data->[0][$col_idx];
1878 for my $row_idx (1..$#$data) { # we are comparing against what we got from [0] above, hence start from 1
1879 my $val = $data->[$row_idx][$col_idx];
1881 if (! exists $value_type_idx->{$col_idx}) { # literal no binds
1882 if (ref $val ne 'SCALAR') {
1883 $bad_slice_report_cref->(
1884 "Incorrect value (expecting SCALAR-ref \\'$$reference_val')",
1889 elsif ($$val ne $$reference_val) {
1890 $bad_slice_report_cref->(
1891 "Inconsistent literal SQL value (expecting \\'$$reference_val')",
1897 elsif (! $value_type_idx->{$col_idx} ) { # regular non-literal value
1898 if (ref $val eq 'SCALAR' or (ref $val eq 'REF' and ref $$val eq 'ARRAY') ) {
1899 $bad_slice_report_cref->("Literal SQL found where a plain bind value is expected", $row_idx, $col_idx);
1902 else { # binds from a \[], compare type and attrs
1903 if (ref $val ne 'REF' or ref $$val ne 'ARRAY') {
1904 $bad_slice_report_cref->(
1905 "Incorrect value (expecting ARRAYREF-ref \\['${$reference_val}->[0]', ... ])",
1910 # start drilling down and bail out early on identical refs
1912 $reference_val != $val
1914 $$reference_val != $$val
1916 if (${$val}->[0] ne ${$reference_val}->[0]) {
1917 $bad_slice_report_cref->(
1918 "Inconsistent literal/bind SQL (expecting \\['${$reference_val}->[0]', ... ])",
1923 # need to check the bind attrs - a bind will happen only once for
1924 # the entire dataset, so any changes further down will be ignored.
1925 elsif (! Data::Compare::Compare(
1926 $value_type_idx->{$col_idx},
1930 @{$self->_resolve_bindattrs(
1931 $source, [ @{$$val}[1 .. $#$$val] ], $colinfos,
1935 $bad_slice_report_cref->(
1936 'Differing bind attributes on literal/bind values not supported',
1946 # neither _dbh_execute_for_fetch, nor _dbh_execute_inserts_with_no_binds
1947 # are atomic (even if execute_for_fetch is a single call). Thus a safety
1949 my $guard = $self->txn_scope_guard;
1951 $self->_query_start( $sql, @$proto_bind ? [[undef => '__BULK_INSERT__' ]] : () );
1952 my $sth = $self->_sth($sql);
1955 # proto bind contains the information on which pieces of $data to pull
1956 # $cols is passed in only for prettier error-reporting
1957 $self->_dbh_execute_for_fetch( $source, $sth, $proto_bind, $cols, $data );
1960 # bind_param_array doesn't work if there are no binds
1961 $self->_dbh_execute_inserts_with_no_binds( $sth, scalar @$data );
1965 $self->_query_end( $sql, @$proto_bind ? [[ undef => '__BULK_INSERT__' ]] : () );
1969 return wantarray ? ($rv, $sth, @$proto_bind) : $rv;
1972 # execute_for_fetch is capable of returning data just fine (it means it
1973 # can be used for INSERT...RETURNING and UPDATE...RETURNING. Since this
1974 # is the void-populate fast-path we will just ignore this altogether
1975 # for the time being.
1976 sub _dbh_execute_for_fetch {
1977 my ($self, $source, $sth, $proto_bind, $cols, $data) = @_;
1979 my @idx_range = ( 0 .. $#$proto_bind );
1981 # If we have any bind attributes to take care of, we will bind the
1982 # proto-bind data (which will never be used by execute_for_fetch)
1983 # However since column bindtypes are "sticky", this is sufficient
1984 # to get the DBD to apply the bindtype to all values later on
1986 my $bind_attrs = $self->_dbi_attrs_for_bind($source, $proto_bind);
1988 for my $i (@idx_range) {
1990 $i+1, # DBI bind indexes are 1-based
1991 $proto_bind->[$i][1],
1993 ) if defined $bind_attrs->[$i];
1996 # At this point $data slots named in the _bind_data_slice_idx of
1997 # each piece of $proto_bind are either \[]s or plain values to be
1998 # passed in. Construct the dispensing coderef. *NOTE* the order
1999 # of $data will differ from this of the ?s in the SQL (due to
2000 # alphabetical ordering by colname). We actually do want to
2001 # preserve this behavior so that prepare_cached has a better
2002 # chance of matching on unrelated calls
2003 my %data_reorder = map { $proto_bind->[$_][0]{_bind_data_slice_idx} => $_ } @idx_range;
2005 my $fetch_row_idx = -1; # saner loop this way
2006 my $fetch_tuple = sub {
2007 return undef if ++$fetch_row_idx > $#$data;
2010 { (ref $_ eq 'REF' and ref $$_ eq 'ARRAY')
2011 ? map { $_->[-1] } @{$$_}[1 .. $#$$_]
2015 { $data->[$fetch_row_idx][$_]}
2017 { $data_reorder{$a} <=> $data_reorder{$b} }
2022 my $tuple_status = [];
2025 $rv = $sth->execute_for_fetch(
2034 # Not all DBDs are create equal. Some throw on error, some return
2035 # an undef $rv, and some set $sth->err - try whatever we can
2036 $err = ($sth->errstr || 'UNKNOWN ERROR ($sth->errstr is unset)') if (
2039 ( !defined $rv or $sth->err )
2042 # Statement must finish even if there was an exception.
2047 $err = shift unless defined $err
2052 ++$i while $i <= $#$tuple_status && !ref $tuple_status->[$i];
2054 $self->throw_exception("Unexpected populate error: $err")
2055 if ($i > $#$tuple_status);
2057 require Data::Dumper::Concise;
2058 $self->throw_exception(sprintf "execute_for_fetch() aborted with '%s' at populate slice:\n%s",
2059 ($tuple_status->[$i][1] || $err),
2060 Data::Dumper::Concise::Dumper( { map { $cols->[$_] => $data->[$i][$_] } (0 .. $#$cols) } ),
2067 sub _dbh_execute_inserts_with_no_binds {
2068 my ($self, $sth, $count) = @_;
2072 my $dbh = $self->_get_dbh;
2073 local $dbh->{RaiseError} = 1;
2074 local $dbh->{PrintError} = 0;
2076 $sth->execute foreach 1..$count;
2082 # Make sure statement is finished even if there was an exception.
2087 $err = shift unless defined $err;
2090 $self->throw_exception($err) if defined $err;
2096 #my ($self, $source, @args) = @_;
2097 shift->_execute('update', @_);
2102 #my ($self, $source, @args) = @_;
2103 shift->_execute('delete', @_);
2108 $self->_execute($self->_select_args(@_));
2111 sub _select_args_to_query {
2114 # my ($op, $ident, $select, $cond, $rs_attrs, $rows, $offset)
2115 # = $self->_select_args($ident, $select, $cond, $attrs);
2116 my ($op, $ident, @args) =
2117 $self->_select_args(@_);
2119 # my ($sql, $prepared_bind) = $self->_gen_sql_bind($op, $ident, [ $select, $cond, $rs_attrs, $rows, $offset ]);
2120 my ($sql, $prepared_bind) = $self->_gen_sql_bind($op, $ident, \@args);
2121 $prepared_bind ||= [];
2124 ? ($sql, $prepared_bind)
2125 : \[ "($sql)", @$prepared_bind ]
2130 my ($self, $ident, $select, $where, $attrs) = @_;
2132 my $sql_maker = $self->sql_maker;
2133 my ($alias2source, $rs_alias) = $self->_resolve_ident_sources ($ident);
2140 $rs_alias && $alias2source->{$rs_alias}
2141 ? ( _rsroot_rsrc => $alias2source->{$rs_alias} )
2146 # Sanity check the attributes (SQLMaker does it too, but
2147 # in case of a software_limit we'll never reach there)
2148 if (defined $attrs->{offset}) {
2149 $self->throw_exception('A supplied offset attribute must be a non-negative integer')
2150 if ( $attrs->{offset} =~ /\D/ or $attrs->{offset} < 0 );
2153 if (defined $attrs->{rows}) {
2154 $self->throw_exception("The rows attribute must be a positive integer if present")
2155 if ( $attrs->{rows} =~ /\D/ or $attrs->{rows} <= 0 );
2157 elsif ($attrs->{offset}) {
2158 # MySQL actually recommends this approach. I cringe.
2159 $attrs->{rows} = $sql_maker->__max_int;
2164 # see if we need to tear the prefetch apart otherwise delegate the limiting to the
2165 # storage, unless software limit was requested
2168 ( $attrs->{rows} && keys %{$attrs->{collapse}} )
2170 # grouped prefetch (to satisfy group_by == select)
2171 ( $attrs->{group_by}
2173 @{$attrs->{group_by}}
2175 $attrs->{_prefetch_selector_range}
2178 ($ident, $select, $where, $attrs)
2179 = $self->_adjust_select_args_for_complex_prefetch ($ident, $select, $where, $attrs);
2181 elsif (! $attrs->{software_limit} ) {
2183 $attrs->{rows} || (),
2184 $attrs->{offset} || (),
2188 # try to simplify the joinmap further (prune unreferenced type-single joins)
2189 $ident = $self->_prune_unused_joins ($ident, $select, $where, $attrs);
2192 # This would be the point to deflate anything found in $where
2193 # (and leave $attrs->{bind} intact). Problem is - inflators historically
2194 # expect a row object. And all we have is a resultsource (it is trivial
2195 # to extract deflator coderefs via $alias2source above).
2197 # I don't see a way forward other than changing the way deflators are
2198 # invoked, and that's just bad...
2201 return ('select', $ident, $select, $where, $attrs, @limit);
2204 # Returns a counting SELECT for a simple count
2205 # query. Abstracted so that a storage could override
2206 # this to { count => 'firstcol' } or whatever makes
2207 # sense as a performance optimization
2209 #my ($self, $source, $rs_attrs) = @_;
2210 return { count => '*' };
2213 sub source_bind_attributes {
2214 shift->throw_exception(
2215 'source_bind_attributes() was never meant to be a callable public method - '
2216 .'please contact the DBIC dev-team and describe your use case so that a reasonable '
2217 .'solution can be provided'
2218 ."\nhttp://search.cpan.org/dist/DBIx-Class/lib/DBIx/Class.pm#GETTING_HELP/SUPPORT"
2226 =item Arguments: $ident, $select, $condition, $attrs
2230 Handle a SQL select statement.
2236 my ($ident, $select, $condition, $attrs) = @_;
2237 return $self->cursor_class->new($self, \@_, $attrs);
2242 my ($rv, $sth, @bind) = $self->_select(@_);
2243 my @row = $sth->fetchrow_array;
2244 my @nextrow = $sth->fetchrow_array if @row;
2245 if(@row && @nextrow) {
2246 carp "Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single";
2248 # Need to call finish() to work round broken DBDs
2253 =head2 sql_limit_dialect
2255 This is an accessor for the default SQL limit dialect used by a particular
2256 storage driver. Can be overridden by supplying an explicit L</limit_dialect>
2257 to L<DBIx::Class::Schema/connect>. For a list of available limit dialects
2258 see L<DBIx::Class::SQLMaker::LimitDialects>.
2263 my ($self, $dbh, $sql) = @_;
2265 # 3 is the if_active parameter which avoids active sth re-use
2266 my $sth = $self->disable_sth_caching
2267 ? $dbh->prepare($sql)
2268 : $dbh->prepare_cached($sql, {}, 3);
2270 # XXX You would think RaiseError would make this impossible,
2271 # but apparently that's not true :(
2272 $self->throw_exception(
2275 sprintf( "\$dbh->prepare() of '%s' through %s failed *silently* without "
2276 .'an exception and/or setting $dbh->errstr',
2278 ? substr($sql, 0, 20) . '...'
2281 'DBD::' . $dbh->{Driver}{Name},
2289 carp_unique 'sth was mistakenly marked/documented as public, stop calling it (will be removed before DBIC v0.09)';
2294 my ($self, $sql) = @_;
2295 $self->dbh_do('_dbh_sth', $sql); # retry over disconnects
2298 sub _dbh_columns_info_for {
2299 my ($self, $dbh, $table) = @_;
2301 if ($dbh->can('column_info')) {
2305 my ($schema,$tab) = $table =~ /^(.+?)\.(.+)$/ ? ($1,$2) : (undef,$table);
2306 my $sth = $dbh->column_info( undef,$schema, $tab, '%' );
2308 while ( my $info = $sth->fetchrow_hashref() ){
2310 $column_info{data_type} = $info->{TYPE_NAME};
2311 $column_info{size} = $info->{COLUMN_SIZE};
2312 $column_info{is_nullable} = $info->{NULLABLE} ? 1 : 0;
2313 $column_info{default_value} = $info->{COLUMN_DEF};
2314 my $col_name = $info->{COLUMN_NAME};
2315 $col_name =~ s/^\"(.*)\"$/$1/;
2317 $result{$col_name} = \%column_info;
2322 return \%result if !$caught && scalar keys %result;
2326 my $sth = $dbh->prepare($self->sql_maker->select($table, undef, \'1 = 0'));
2328 my @columns = @{$sth->{NAME_lc}};
2329 for my $i ( 0 .. $#columns ){
2331 $column_info{data_type} = $sth->{TYPE}->[$i];
2332 $column_info{size} = $sth->{PRECISION}->[$i];
2333 $column_info{is_nullable} = $sth->{NULLABLE}->[$i] ? 1 : 0;
2335 if ($column_info{data_type} =~ m/^(.*?)\((.*?)\)$/) {
2336 $column_info{data_type} = $1;
2337 $column_info{size} = $2;
2340 $result{$columns[$i]} = \%column_info;
2344 foreach my $col (keys %result) {
2345 my $colinfo = $result{$col};
2346 my $type_num = $colinfo->{data_type};
2348 if(defined $type_num && $dbh->can('type_info')) {
2349 my $type_info = $dbh->type_info($type_num);
2350 $type_name = $type_info->{TYPE_NAME} if $type_info;
2351 $colinfo->{data_type} = $type_name if $type_name;
2358 sub columns_info_for {
2359 my ($self, $table) = @_;
2360 $self->_dbh_columns_info_for ($self->_get_dbh, $table);
2363 =head2 last_insert_id
2365 Return the row id of the last insert.
2369 sub _dbh_last_insert_id {
2370 my ($self, $dbh, $source, $col) = @_;
2372 my $id = try { $dbh->last_insert_id (undef, undef, $source->name, $col) };
2374 return $id if defined $id;
2376 my $class = ref $self;
2377 $self->throw_exception ("No storage specific _dbh_last_insert_id() method implemented in $class, and the generic DBI::last_insert_id() failed");
2380 sub last_insert_id {
2382 $self->_dbh_last_insert_id ($self->_dbh, @_);
2385 =head2 _native_data_type
2389 =item Arguments: $type_name
2393 This API is B<EXPERIMENTAL>, will almost definitely change in the future, and
2394 currently only used by L<::AutoCast|DBIx::Class::Storage::DBI::AutoCast> and
2395 L<::Sybase::ASE|DBIx::Class::Storage::DBI::Sybase::ASE>.
2397 The default implementation returns C<undef>, implement in your Storage driver if
2398 you need this functionality.
2400 Should map types from other databases to the native RDBMS type, for example
2401 C<VARCHAR2> to C<VARCHAR>.
2403 Types with modifiers should map to the underlying data type. For example,
2404 C<INTEGER AUTO_INCREMENT> should become C<INTEGER>.
2406 Composite types should map to the container type, for example
2407 C<ENUM(foo,bar,baz)> becomes C<ENUM>.
2411 sub _native_data_type {
2412 #my ($self, $data_type) = @_;
2416 # Check if placeholders are supported at all
2417 sub _determine_supports_placeholders {
2419 my $dbh = $self->_get_dbh;
2421 # some drivers provide a $dbh attribute (e.g. Sybase and $dbh->{syb_dynamic_supported})
2422 # but it is inaccurate more often than not
2424 local $dbh->{PrintError} = 0;
2425 local $dbh->{RaiseError} = 1;
2426 $dbh->do('select ?', {}, 1);
2434 # Check if placeholders bound to non-string types throw exceptions
2436 sub _determine_supports_typeless_placeholders {
2438 my $dbh = $self->_get_dbh;
2441 local $dbh->{PrintError} = 0;
2442 local $dbh->{RaiseError} = 1;
2443 # this specifically tests a bind that is NOT a string
2444 $dbh->do('select 1 where 1 = ?', {}, 1);
2454 Returns the database driver name.
2459 shift->_get_dbh->{Driver}->{Name};
2462 =head2 bind_attribute_by_data_type
2464 Given a datatype from column info, returns a database specific bind
2465 attribute for C<< $dbh->bind_param($val,$attribute) >> or nothing if we will
2466 let the database planner just handle it.
2468 Generally only needed for special case column types, like bytea in postgres.
2472 sub bind_attribute_by_data_type {
2476 =head2 is_datatype_numeric
2478 Given a datatype from column_info, returns a boolean value indicating if
2479 the current RDBMS considers it a numeric value. This controls how
2480 L<DBIx::Class::Row/set_column> decides whether to mark the column as
2481 dirty - when the datatype is deemed numeric a C<< != >> comparison will
2482 be performed instead of the usual C<eq>.
2486 sub is_datatype_numeric {
2487 #my ($self, $dt) = @_;
2489 return 0 unless $_[1];
2492 numeric | int(?:eger)? | (?:tiny|small|medium|big)int | dec(?:imal)? | real | float | double (?: \s+ precision)? | (?:big)?serial
2497 =head2 create_ddl_dir
2501 =item Arguments: $schema \@databases, $version, $directory, $preversion, \%sqlt_args
2505 Creates a SQL file based on the Schema, for each of the specified
2506 database engines in C<\@databases> in the given directory.
2507 (note: specify L<SQL::Translator> names, not L<DBI> driver names).
2509 Given a previous version number, this will also create a file containing
2510 the ALTER TABLE statements to transform the previous schema into the
2511 current one. Note that these statements may contain C<DROP TABLE> or
2512 C<DROP COLUMN> statements that can potentially destroy data.
2514 The file names are created using the C<ddl_filename> method below, please
2515 override this method in your schema if you would like a different file
2516 name format. For the ALTER file, the same format is used, replacing
2517 $version in the name with "$preversion-$version".
2519 See L<SQL::Translator/METHODS> for a list of values for C<\%sqlt_args>.
2520 The most common value for this would be C<< { add_drop_table => 1 } >>
2521 to have the SQL produced include a C<DROP TABLE> statement for each table
2522 created. For quoting purposes supply C<quote_table_names> and
2523 C<quote_field_names>.
2525 If no arguments are passed, then the following default values are assumed:
2529 =item databases - ['MySQL', 'SQLite', 'PostgreSQL']
2531 =item version - $schema->schema_version
2533 =item directory - './'
2535 =item preversion - <none>
2539 By default, C<\%sqlt_args> will have
2541 { add_drop_table => 1, ignore_constraint_names => 1, ignore_index_names => 1 }
2543 merged with the hash passed in. To disable any of those features, pass in a
2544 hashref like the following
2546 { ignore_constraint_names => 0, # ... other options }
2549 WARNING: You are strongly advised to check all SQL files created, before applying
2554 sub create_ddl_dir {
2555 my ($self, $schema, $databases, $version, $dir, $preversion, $sqltargs) = @_;
2558 carp "No directory given, using ./\n";
2563 (require File::Path and File::Path::make_path ("$dir")) # make_path does not like objects (i.e. Path::Class::Dir)
2565 $self->throw_exception(
2566 "Failed to create '$dir': " . ($! || $@ || 'error unknown')
2570 $self->throw_exception ("Directory '$dir' does not exist\n") unless(-d $dir);
2572 $databases ||= ['MySQL', 'SQLite', 'PostgreSQL'];
2573 $databases = [ $databases ] if(ref($databases) ne 'ARRAY');
2575 my $schema_version = $schema->schema_version || '1.x';
2576 $version ||= $schema_version;
2579 add_drop_table => 1,
2580 ignore_constraint_names => 1,
2581 ignore_index_names => 1,
2585 unless (DBIx::Class::Optional::Dependencies->req_ok_for ('deploy')) {
2586 $self->throw_exception("Can't create a ddl file without " . DBIx::Class::Optional::Dependencies->req_missing_for ('deploy') );
2589 my $sqlt = SQL::Translator->new( $sqltargs );
2591 $sqlt->parser('SQL::Translator::Parser::DBIx::Class');
2592 my $sqlt_schema = $sqlt->translate({ data => $schema })
2593 or $self->throw_exception ($sqlt->error);
2595 foreach my $db (@$databases) {
2597 $sqlt->{schema} = $sqlt_schema;
2598 $sqlt->producer($db);
2601 my $filename = $schema->ddl_filename($db, $version, $dir);
2602 if (-e $filename && ($version eq $schema_version )) {
2603 # if we are dumping the current version, overwrite the DDL
2604 carp "Overwriting existing DDL file - $filename";
2608 my $output = $sqlt->translate;
2610 carp("Failed to translate to $db, skipping. (" . $sqlt->error . ")");
2613 if(!open($file, ">$filename")) {
2614 $self->throw_exception("Can't open $filename for writing ($!)");
2617 print $file $output;
2620 next unless ($preversion);
2622 require SQL::Translator::Diff;
2624 my $prefilename = $schema->ddl_filename($db, $preversion, $dir);
2625 if(!-e $prefilename) {
2626 carp("No previous schema file found ($prefilename)");
2630 my $difffile = $schema->ddl_filename($db, $version, $dir, $preversion);
2632 carp("Overwriting existing diff file - $difffile");
2638 my $t = SQL::Translator->new($sqltargs);
2643 or $self->throw_exception ($t->error);
2645 my $out = $t->translate( $prefilename )
2646 or $self->throw_exception ($t->error);
2648 $source_schema = $t->schema;
2650 $source_schema->name( $prefilename )
2651 unless ( $source_schema->name );
2654 # The "new" style of producers have sane normalization and can support
2655 # diffing a SQL file against a DBIC->SQLT schema. Old style ones don't
2656 # And we have to diff parsed SQL against parsed SQL.
2657 my $dest_schema = $sqlt_schema;
2659 unless ( "SQL::Translator::Producer::$db"->can('preprocess_schema') ) {
2660 my $t = SQL::Translator->new($sqltargs);
2665 or $self->throw_exception ($t->error);
2667 my $out = $t->translate( $filename )
2668 or $self->throw_exception ($t->error);
2670 $dest_schema = $t->schema;
2672 $dest_schema->name( $filename )
2673 unless $dest_schema->name;
2676 my $diff = SQL::Translator::Diff::schema_diff($source_schema, $db,
2680 if(!open $file, ">$difffile") {
2681 $self->throw_exception("Can't write to $difffile ($!)");
2689 =head2 deployment_statements
2693 =item Arguments: $schema, $type, $version, $directory, $sqlt_args
2697 Returns the statements used by L</deploy> and L<DBIx::Class::Schema/deploy>.
2699 The L<SQL::Translator> (not L<DBI>) database driver name can be explicitly
2700 provided in C<$type>, otherwise the result of L</sqlt_type> is used as default.
2702 C<$directory> is used to return statements from files in a previously created
2703 L</create_ddl_dir> directory and is optional. The filenames are constructed
2704 from L<DBIx::Class::Schema/ddl_filename>, the schema name and the C<$version>.
2706 If no C<$directory> is specified then the statements are constructed on the
2707 fly using L<SQL::Translator> and C<$version> is ignored.
2709 See L<SQL::Translator/METHODS> for a list of values for C<$sqlt_args>.
2713 sub deployment_statements {
2714 my ($self, $schema, $type, $version, $dir, $sqltargs) = @_;
2715 $type ||= $self->sqlt_type;
2716 $version ||= $schema->schema_version || '1.x';
2718 my $filename = $schema->ddl_filename($type, $version, $dir);
2721 # FIXME replace this block when a proper sane sql parser is available
2723 open($file, "<$filename")
2724 or $self->throw_exception("Can't open $filename ($!)");
2727 return join('', @rows);
2730 unless (DBIx::Class::Optional::Dependencies->req_ok_for ('deploy') ) {
2731 $self->throw_exception("Can't deploy without a ddl_dir or " . DBIx::Class::Optional::Dependencies->req_missing_for ('deploy') );
2734 # sources needs to be a parser arg, but for simplicty allow at top level
2736 $sqltargs->{parser_args}{sources} = delete $sqltargs->{sources}
2737 if exists $sqltargs->{sources};
2739 my $tr = SQL::Translator->new(
2740 producer => "SQL::Translator::Producer::${type}",
2742 parser => 'SQL::Translator::Parser::DBIx::Class',
2746 return preserve_context {
2749 $self->throw_exception( 'Unable to produce deployment statements: ' . $tr->error)
2750 unless defined $_[0];
2754 # FIXME deploy() currently does not accurately report sql errors
2755 # Will always return true while errors are warned
2757 my ($self, $schema, $type, $sqltargs, $dir) = @_;
2761 return if($line =~ /^--/);
2762 # next if($line =~ /^DROP/m);
2763 return if($line =~ /^BEGIN TRANSACTION/m);
2764 return if($line =~ /^COMMIT/m);
2765 return if $line =~ /^\s+$/; # skip whitespace only
2766 $self->_query_start($line);
2768 # do a dbh_do cycle here, as we need some error checking in
2769 # place (even though we will ignore errors)
2770 $self->dbh_do (sub { $_[1]->do($line) });
2772 carp qq{$_ (running "${line}")};
2774 $self->_query_end($line);
2776 my @statements = $schema->deployment_statements($type, undef, $dir, { %{ $sqltargs || {} }, no_comments => 1 } );
2777 if (@statements > 1) {
2778 foreach my $statement (@statements) {
2779 $deploy->( $statement );
2782 elsif (@statements == 1) {
2783 # split on single line comments and end of statements
2784 foreach my $line ( split(/\s*--.*\n|;\n/, $statements[0])) {
2790 =head2 datetime_parser
2792 Returns the datetime parser class
2796 sub datetime_parser {
2798 return $self->{datetime_parser} ||= do {
2799 $self->build_datetime_parser(@_);
2803 =head2 datetime_parser_type
2805 Defines the datetime parser class - currently defaults to L<DateTime::Format::MySQL>
2807 =head2 build_datetime_parser
2809 See L</datetime_parser>
2813 sub build_datetime_parser {
2815 my $type = $self->datetime_parser_type(@_);
2820 =head2 is_replicating
2822 A boolean that reports if a particular L<DBIx::Class::Storage::DBI> is set to
2823 replicate from a master database. Default is undef, which is the result
2824 returned by databases that don't support replication.
2828 sub is_replicating {
2833 =head2 lag_behind_master
2835 Returns a number that represents a certain amount of lag behind a master db
2836 when a given storage is replicating. The number is database dependent, but
2837 starts at zero and increases with the amount of lag. Default in undef
2841 sub lag_behind_master {
2845 =head2 relname_to_table_alias
2849 =item Arguments: $relname, $join_count
2853 L<DBIx::Class> uses L<DBIx::Class::Relationship> names as table aliases in
2856 This hook is to allow specific L<DBIx::Class::Storage> drivers to change the
2857 way these aliases are named.
2859 The default behavior is C<< "$relname_$join_count" if $join_count > 1 >>,
2860 otherwise C<"$relname">.
2864 sub relname_to_table_alias {
2865 my ($self, $relname, $join_count) = @_;
2867 my $alias = ($join_count && $join_count > 1 ?
2868 join('_', $relname, $join_count) : $relname);
2873 # The size in bytes to use for DBI's ->bind_param_inout, this is the generic
2874 # version and it may be necessary to amend or override it for a specific storage
2875 # if such binds are necessary.
2876 sub _max_column_bytesize {
2877 my ($self, $attr) = @_;
2881 if ($attr->{sqlt_datatype}) {
2882 my $data_type = lc($attr->{sqlt_datatype});
2884 if ($attr->{sqlt_size}) {
2886 # String/sized-binary types
2887 if ($data_type =~ /^(?:
2888 l? (?:var)? char(?:acter)? (?:\s*varying)?
2890 (?:var)? binary (?:\s*varying)?
2895 $max_size = $attr->{sqlt_size};
2897 # Other charset/unicode types, assume scale of 4
2898 elsif ($data_type =~ /^(?:
2899 national \s* character (?:\s*varying)?
2908 $max_size = $attr->{sqlt_size} * 4;
2912 if (!$max_size and !$self->_is_lob_type($data_type)) {
2913 $max_size = 100 # for all other (numeric?) datatypes
2917 $max_size || $self->_dbic_connect_attributes->{LongReadLen} || $self->_get_dbh->{LongReadLen} || 8000;
2920 # Determine if a data_type is some type of BLOB
2922 my ($self, $data_type) = @_;
2923 $data_type && ($data_type =~ /lob|bfile|text|image|bytea|memo/i
2924 || $data_type =~ /^long(?:\s+(?:raw|bit\s*varying|varbit|binary
2925 |varchar|character\s*varying|nvarchar
2926 |national\s*character\s*varying))?\z/xi);
2929 sub _is_binary_lob_type {
2930 my ($self, $data_type) = @_;
2931 $data_type && ($data_type =~ /blob|bfile|image|bytea/i
2932 || $data_type =~ /^long(?:\s+(?:raw|bit\s*varying|varbit|binary))?\z/xi);
2935 sub _is_text_lob_type {
2936 my ($self, $data_type) = @_;
2937 $data_type && ($data_type =~ /^(?:clob|memo)\z/i
2938 || $data_type =~ /^long(?:\s+(?:varchar|character\s*varying|nvarchar
2939 |national\s*character\s*varying))\z/xi);
2946 =head2 DBIx::Class and AutoCommit
2948 DBIx::Class can do some wonderful magic with handling exceptions,
2949 disconnections, and transactions when you use C<< AutoCommit => 1 >>
2950 (the default) combined with L<txn_do|DBIx::Class::Storage/txn_do> for
2951 transaction support.
2953 If you set C<< AutoCommit => 0 >> in your connect info, then you are always
2954 in an assumed transaction between commits, and you're telling us you'd
2955 like to manage that manually. A lot of the magic protections offered by
2956 this module will go away. We can't protect you from exceptions due to database
2957 disconnects because we don't know anything about how to restart your
2958 transactions. You're on your own for handling all sorts of exceptional
2959 cases if you choose the C<< AutoCommit => 0 >> path, just as you would
2965 Matt S. Trout <mst@shadowcatsystems.co.uk>
2967 Andy Grundman <andy@hybridized.org>
2971 You may distribute this code under the same terms as Perl itself.