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 Carp::Clan qw/^DBIx::Class/;
12 use DBIx::Class::Storage::DBI::Cursor;
13 use DBIx::Class::Storage::Statistics;
14 use Scalar::Util qw/refaddr weaken reftype blessed/;
15 use Data::Dumper::Concise 'Dumper';
16 use Sub::Name 'subname';
18 use File::Path 'make_path';
21 __PACKAGE__->mk_group_accessors('simple' => qw/
22 _connect_info _dbi_connect_info _dbic_connect_attributes _driver_determined
23 _dbh _server_info_hash _conn_pid _conn_tid _sql_maker _sql_maker_opts
24 transaction_depth _dbh_autocommit savepoints
27 # the values for these accessors are picked out (and deleted) from
28 # the attribute hashref passed to connect_info
29 my @storage_options = qw/
30 on_connect_call on_disconnect_call on_connect_do on_disconnect_do
31 disable_sth_caching unsafe auto_savepoint
33 __PACKAGE__->mk_group_accessors('simple' => @storage_options);
36 # default cursor class, overridable in connect_info attributes
37 __PACKAGE__->cursor_class('DBIx::Class::Storage::DBI::Cursor');
39 __PACKAGE__->mk_group_accessors('inherited' => qw/
41 _supports_insert_returning
43 __PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks');
45 # Each of these methods need _determine_driver called before itself
46 # in order to function reliably. This is a purely DRY optimization
47 my @rdbms_specific_methods = qw/
62 for my $meth (@rdbms_specific_methods) {
64 my $orig = __PACKAGE__->can ($meth)
68 no warnings qw/redefine/;
69 *{__PACKAGE__ ."::$meth"} = subname $meth => sub {
70 if (not $_[0]->_driver_determined) {
71 $_[0]->_determine_driver;
72 goto $_[0]->can($meth);
81 DBIx::Class::Storage::DBI - DBI storage handler
85 my $schema = MySchema->connect('dbi:SQLite:my.db');
87 $schema->storage->debug(1);
89 my @stuff = $schema->storage->dbh_do(
91 my ($storage, $dbh, @args) = @_;
92 $dbh->do("DROP TABLE authors");
97 $schema->resultset('Book')->search({
98 written_on => $schema->storage->datetime_parser->format_datetime(DateTime->now)
103 This class represents the connection to an RDBMS via L<DBI>. See
104 L<DBIx::Class::Storage> for general information. This pod only
105 documents DBI-specific methods and behaviors.
112 my $new = shift->next::method(@_);
114 $new->transaction_depth(0);
115 $new->_sql_maker_opts({});
116 $new->{savepoints} = [];
117 $new->{_in_dbh_do} = 0;
118 $new->{_dbh_gen} = 0;
120 # read below to see what this does
121 $new->_arm_global_destructor;
126 # This is hack to work around perl shooting stuff in random
127 # order on exit(). If we do not walk the remaining storage
128 # objects in an END block, there is a *small but real* chance
129 # of a fork()ed child to kill the parent's shared DBI handle,
130 # *before perl reaches the DESTROY in this package*
131 # Yes, it is ugly and effective.
133 my %seek_and_destroy;
135 sub _arm_global_destructor {
137 my $key = Scalar::Util::refaddr ($self);
138 $seek_and_destroy{$key} = $self;
139 Scalar::Util::weaken ($seek_and_destroy{$key});
143 local $?; # just in case the DBI destructor changes it somehow
145 # destroy just the object if not native to this process/thread
146 $_->_preserve_foreign_dbh for (grep
148 values %seek_and_destroy
156 # destroy just the object if not native to this process/thread
157 $self->_preserve_foreign_dbh;
159 # some databases need this to stop spewing warnings
160 if (my $dbh = $self->_dbh) {
162 %{ $dbh->{CachedKids} } = ();
170 sub _preserve_foreign_dbh {
173 return unless $self->_dbh;
177 return unless $self->_dbh;
183 # handle pid changes correctly - do not destroy parent's connection
187 return if ( defined $self->_conn_pid and $self->_conn_pid == $$ );
189 $self->_dbh->{InactiveDestroy} = 1;
196 # very similar to above, but seems to FAIL if I set InactiveDestroy
200 if ( ! defined $self->_conn_tid ) {
203 elsif ( $self->_conn_tid == threads->tid ) {
204 return; # same thread
207 #$self->_dbh->{InactiveDestroy} = 1; # why does t/51threads.t fail...?
217 This method is normally called by L<DBIx::Class::Schema/connection>, which
218 encapsulates its argument list in an arrayref before passing them here.
220 The argument list may contain:
226 The same 4-element argument set one would normally pass to
227 L<DBI/connect>, optionally followed by
228 L<extra attributes|/DBIx::Class specific connection attributes>
229 recognized by DBIx::Class:
231 $connect_info_args = [ $dsn, $user, $password, \%dbi_attributes?, \%extra_attributes? ];
235 A single code reference which returns a connected
236 L<DBI database handle|DBI/connect> optionally followed by
237 L<extra attributes|/DBIx::Class specific connection attributes> recognized
240 $connect_info_args = [ sub { DBI->connect (...) }, \%extra_attributes? ];
244 A single hashref with all the attributes and the dsn/user/password
247 $connect_info_args = [{
255 $connect_info_args = [{
256 dbh_maker => sub { DBI->connect (...) },
261 This is particularly useful for L<Catalyst> based applications, allowing the
262 following config (L<Config::General> style):
267 dsn dbi:mysql:database=test
274 The C<dsn>/C<user>/C<password> combination can be substituted by the
275 C<dbh_maker> key whose value is a coderef that returns a connected
276 L<DBI database handle|DBI/connect>
280 Please note that the L<DBI> docs recommend that you always explicitly
281 set C<AutoCommit> to either I<0> or I<1>. L<DBIx::Class> further
282 recommends that it be set to I<1>, and that you perform transactions
283 via our L<DBIx::Class::Schema/txn_do> method. L<DBIx::Class> will set it
284 to I<1> if you do not do explicitly set it to zero. This is the default
285 for most DBDs. See L</DBIx::Class and AutoCommit> for details.
287 =head3 DBIx::Class specific connection attributes
289 In addition to the standard L<DBI|DBI/ATTRIBUTES_COMMON_TO_ALL_HANDLES>
290 L<connection|DBI/Database_Handle_Attributes> attributes, DBIx::Class recognizes
291 the following connection options. These options can be mixed in with your other
292 L<DBI> connection attributes, or placed in a separate hashref
293 (C<\%extra_attributes>) as shown above.
295 Every time C<connect_info> is invoked, any previous settings for
296 these options will be cleared before setting the new ones, regardless of
297 whether any options are specified in the new C<connect_info>.
304 Specifies things to do immediately after connecting or re-connecting to
305 the database. Its value may contain:
311 This contains one SQL statement to execute.
313 =item an array reference
315 This contains SQL statements to execute in order. Each element contains
316 a string or a code reference that returns a string.
318 =item a code reference
320 This contains some code to execute. Unlike code references within an
321 array reference, its return value is ignored.
325 =item on_disconnect_do
327 Takes arguments in the same form as L</on_connect_do> and executes them
328 immediately before disconnecting from the database.
330 Note, this only runs if you explicitly call L</disconnect> on the
333 =item on_connect_call
335 A more generalized form of L</on_connect_do> that calls the specified
336 C<connect_call_METHOD> methods in your storage driver.
338 on_connect_do => 'select 1'
342 on_connect_call => [ [ do_sql => 'select 1' ] ]
344 Its values may contain:
350 Will call the C<connect_call_METHOD> method.
352 =item a code reference
354 Will execute C<< $code->($storage) >>
356 =item an array reference
358 Each value can be a method name or code reference.
360 =item an array of arrays
362 For each array, the first item is taken to be the C<connect_call_> method name
363 or code reference, and the rest are parameters to it.
367 Some predefined storage methods you may use:
373 Executes a SQL string or a code reference that returns a SQL string. This is
374 what L</on_connect_do> and L</on_disconnect_do> use.
382 Will execute the scalar as SQL.
386 Taken to be arguments to L<DBI/do>, the SQL string optionally followed by the
387 attributes hashref and bind values.
389 =item a code reference
391 Will execute C<< $code->($storage) >> and execute the return array refs as
398 Execute any statements necessary to initialize the database session to return
399 and accept datetime/timestamp values used with
400 L<DBIx::Class::InflateColumn::DateTime>.
402 Only necessary for some databases, see your specific storage driver for
403 implementation details.
407 =item on_disconnect_call
409 Takes arguments in the same form as L</on_connect_call> and executes them
410 immediately before disconnecting from the database.
412 Calls the C<disconnect_call_METHOD> methods as opposed to the
413 C<connect_call_METHOD> methods called by L</on_connect_call>.
415 Note, this only runs if you explicitly call L</disconnect> on the
418 =item disable_sth_caching
420 If set to a true value, this option will disable the caching of
421 statement handles via L<DBI/prepare_cached>.
425 Sets the limit dialect. This is useful for JDBC-bridge among others
426 where the remote SQL-dialect cannot be determined by the name of the
427 driver alone. See also L<SQL::Abstract::Limit>.
431 Specifies what characters to use to quote table and column names. If
432 you use this you will want to specify L</name_sep> as well.
434 C<quote_char> expects either a single character, in which case is it
435 is placed on either side of the table/column name, or an arrayref of length
436 2 in which case the table/column name is placed between the elements.
438 For example under MySQL you should use C<< quote_char => '`' >>, and for
439 SQL Server you should use C<< quote_char => [qw/[ ]/] >>.
443 This only needs to be used in conjunction with C<quote_char>, and is used to
444 specify the character that separates elements (schemas, tables, columns) from
445 each other. In most cases this is simply a C<.>.
447 The consequences of not supplying this value is that L<SQL::Abstract>
448 will assume DBIx::Class' uses of aliases to be complete column
449 names. The output will look like I<"me.name"> when it should actually
454 This Storage driver normally installs its own C<HandleError>, sets
455 C<RaiseError> and C<ShowErrorStatement> on, and sets C<PrintError> off on
456 all database handles, including those supplied by a coderef. It does this
457 so that it can have consistent and useful error behavior.
459 If you set this option to a true value, Storage will not do its usual
460 modifications to the database handle's attributes, and instead relies on
461 the settings in your connect_info DBI options (or the values you set in
462 your connection coderef, in the case that you are connecting via coderef).
464 Note that your custom settings can cause Storage to malfunction,
465 especially if you set a C<HandleError> handler that suppresses exceptions
466 and/or disable C<RaiseError>.
470 If this option is true, L<DBIx::Class> will use savepoints when nesting
471 transactions, making it possible to recover from failure in the inner
472 transaction without having to abort all outer transactions.
476 Use this argument to supply a cursor class other than the default
477 L<DBIx::Class::Storage::DBI::Cursor>.
481 Some real-life examples of arguments to L</connect_info> and
482 L<DBIx::Class::Schema/connect>
484 # Simple SQLite connection
485 ->connect_info([ 'dbi:SQLite:./foo.db' ]);
488 ->connect_info([ sub { DBI->connect(...) } ]);
490 # Connect via subref in hashref
492 dbh_maker => sub { DBI->connect(...) },
493 on_connect_do => 'alter session ...',
496 # A bit more complicated
503 { quote_char => q{"}, name_sep => q{.} },
507 # Equivalent to the previous example
513 { AutoCommit => 1, quote_char => q{"}, name_sep => q{.} },
517 # Same, but with hashref as argument
518 # See parse_connect_info for explanation
521 dsn => 'dbi:Pg:dbname=foo',
523 password => 'my_pg_password',
530 # Subref + DBIx::Class-specific connection options
533 sub { DBI->connect(...) },
537 on_connect_do => ['SET search_path TO myschema,otherschema,public'],
538 disable_sth_caching => 1,
548 my ($self, $info) = @_;
550 return $self->_connect_info if !$info;
552 $self->_connect_info($info); # copy for _connect_info
554 $info = $self->_normalize_connect_info($info)
555 if ref $info eq 'ARRAY';
557 for my $storage_opt (keys %{ $info->{storage_options} }) {
558 my $value = $info->{storage_options}{$storage_opt};
560 $self->$storage_opt($value);
563 # Kill sql_maker/_sql_maker_opts, so we get a fresh one with only
564 # the new set of options
565 $self->_sql_maker(undef);
566 $self->_sql_maker_opts({});
568 for my $sql_maker_opt (keys %{ $info->{sql_maker_options} }) {
569 my $value = $info->{sql_maker_options}{$sql_maker_opt};
571 $self->_sql_maker_opts->{$sql_maker_opt} = $value;
575 %{ $self->_default_dbi_connect_attributes || {} },
576 %{ $info->{attributes} || {} },
579 my @args = @{ $info->{arguments} };
581 $self->_dbi_connect_info([@args,
582 %attrs && !(ref $args[0] eq 'CODE') ? \%attrs : ()]);
585 # save attributes them in a separate accessor so they are always
586 # introspectable, even in case of a CODE $dbhmaker
587 $self->_dbic_connect_attributes (\%attrs);
589 return $self->_connect_info;
592 sub _normalize_connect_info {
593 my ($self, $info_arg) = @_;
596 my @args = @$info_arg; # take a shallow copy for further mutilation
598 # combine/pre-parse arguments depending on invocation style
601 if (ref $args[0] eq 'CODE') { # coderef with optional \%extra_attributes
602 %attrs = %{ $args[1] || {} };
605 elsif (ref $args[0] eq 'HASH') { # single hashref (i.e. Catalyst config)
606 %attrs = %{$args[0]};
608 if (my $code = delete $attrs{dbh_maker}) {
611 my @ignored = grep { delete $attrs{$_} } (qw/dsn user password/);
614 'Attribute(s) %s in connect_info were ignored, as they can not be applied '
615 . "to the result of 'dbh_maker'",
617 join (', ', map { "'$_'" } (@ignored) ),
622 @args = delete @attrs{qw/dsn user password/};
625 else { # otherwise assume dsn/user/password + \%attrs + \%extra_attrs
627 % { $args[3] || {} },
628 % { $args[4] || {} },
630 @args = @args[0,1,2];
633 $info{arguments} = \@args;
635 my @storage_opts = grep exists $attrs{$_},
636 @storage_options, 'cursor_class';
638 @{ $info{storage_options} }{@storage_opts} =
639 delete @attrs{@storage_opts} if @storage_opts;
641 my @sql_maker_opts = grep exists $attrs{$_},
642 qw/limit_dialect quote_char name_sep/;
644 @{ $info{sql_maker_options} }{@sql_maker_opts} =
645 delete @attrs{@sql_maker_opts} if @sql_maker_opts;
647 $info{attributes} = \%attrs if %attrs;
652 sub _default_dbi_connect_attributes {
662 This method is deprecated in favour of setting via L</connect_info>.
666 =head2 on_disconnect_do
668 This method is deprecated in favour of setting via L</connect_info>.
672 sub _parse_connect_do {
673 my ($self, $type) = @_;
675 my $val = $self->$type;
676 return () if not defined $val;
681 push @res, [ 'do_sql', $val ];
682 } elsif (ref($val) eq 'CODE') {
684 } elsif (ref($val) eq 'ARRAY') {
685 push @res, map { [ 'do_sql', $_ ] } @$val;
687 $self->throw_exception("Invalid type for $type: ".ref($val));
695 Arguments: ($subref | $method_name), @extra_coderef_args?
697 Execute the given $subref or $method_name using the new exception-based
698 connection management.
700 The first two arguments will be the storage object that C<dbh_do> was called
701 on and a database handle to use. Any additional arguments will be passed
702 verbatim to the called subref as arguments 2 and onwards.
704 Using this (instead of $self->_dbh or $self->dbh) ensures correct
705 exception handling and reconnection (or failover in future subclasses).
707 Your subref should have no side-effects outside of the database, as
708 there is the potential for your subref to be partially double-executed
709 if the database connection was stale/dysfunctional.
713 my @stuff = $schema->storage->dbh_do(
715 my ($storage, $dbh, @cols) = @_;
716 my $cols = join(q{, }, @cols);
717 $dbh->selectrow_array("SELECT $cols FROM foo");
728 my $dbh = $self->_get_dbh;
730 return $self->$code($dbh, @_)
731 if ( $self->{_in_dbh_do} || $self->{transaction_depth} );
733 local $self->{_in_dbh_do} = 1;
735 # take a ref instead of a copy, to preserve coderef @_ aliasing semantics
738 $self->$code ($dbh, @$args);
740 $self->throw_exception($_) if $self->connected;
742 # We were not connected - reconnect and retry, but let any
743 # exception fall right through this time
744 carp "Retrying $code after catching disconnected exception: $_"
745 if $ENV{DBIC_DBIRETRY_DEBUG};
747 $self->_populate_dbh;
748 $self->$code($self->_dbh, @$args);
752 # This is basically a blend of dbh_do above and DBIx::Class::Storage::txn_do.
753 # It also informs dbh_do to bypass itself while under the direction of txn_do,
754 # via $self->{_in_dbh_do} (this saves some redundant eval and errorcheck, etc)
759 ref $coderef eq 'CODE' or $self->throw_exception
760 ('$coderef must be a CODE reference');
762 return $coderef->(@_) if $self->{transaction_depth} && ! $self->auto_savepoint;
764 local $self->{_in_dbh_do} = 1;
767 my $want_array = wantarray;
773 # take a ref instead of a copy, to preserve coderef @_ aliasing semantics
781 @result = $coderef->(@$args);
783 elsif(defined $want_array) {
784 $result[0] = $coderef->(@$args);
794 if(! defined $exception) { return $want_array ? @result : $result[0] }
796 if($tried++ || $self->connected) {
797 my $rollback_exception;
798 try { $self->txn_rollback } catch { $rollback_exception = shift };
799 if(defined $rollback_exception) {
800 my $exception_class = "DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION";
801 $self->throw_exception($exception) # propagate nested rollback
802 if $rollback_exception =~ /$exception_class/;
804 $self->throw_exception(
805 "Transaction aborted: ${exception}. "
806 . "Rollback failed: ${rollback_exception}"
809 $self->throw_exception($exception)
812 # We were not connected, and was first try - reconnect and retry
814 carp "Retrying $coderef after catching disconnected exception: $exception"
815 if $ENV{DBIC_DBIRETRY_DEBUG};
816 $self->_populate_dbh;
822 Our C<disconnect> method also performs a rollback first if the
823 database is not in C<AutoCommit> mode.
833 push @actions, ( $self->on_disconnect_call || () );
834 push @actions, $self->_parse_connect_do ('on_disconnect_do');
836 $self->_do_connection_actions(disconnect_call_ => $_) for @actions;
838 $self->_dbh_rollback unless $self->_dbh_autocommit;
840 %{ $self->_dbh->{CachedKids} } = ();
841 $self->_dbh->disconnect;
847 =head2 with_deferred_fk_checks
851 =item Arguments: C<$coderef>
853 =item Return Value: The return value of $coderef
857 Storage specific method to run the code ref with FK checks deferred or
858 in MySQL's case disabled entirely.
862 # Storage subclasses should override this
863 sub with_deferred_fk_checks {
864 my ($self, $sub) = @_;
872 =item Arguments: none
874 =item Return Value: 1|0
878 Verifies that the current database handle is active and ready to execute
879 an SQL statement (e.g. the connection did not get stale, server is still
880 answering, etc.) This method is used internally by L</dbh>.
886 return 0 unless $self->_seems_connected;
889 local $self->_dbh->{RaiseError} = 1;
894 sub _seems_connected {
897 $self->_preserve_foreign_dbh;
899 my $dbh = $self->_dbh
902 return $dbh->FETCH('Active');
908 my $dbh = $self->_dbh or return 0;
913 sub ensure_connected {
916 unless ($self->connected) {
917 $self->_populate_dbh;
923 Returns a C<$dbh> - a data base handle of class L<DBI>. The returned handle
924 is guaranteed to be healthy by implicitly calling L</connected>, and if
925 necessary performing a reconnection before returning. Keep in mind that this
926 is very B<expensive> on some database engines. Consider using L</dbh_do>
934 if (not $self->_dbh) {
935 $self->_populate_dbh;
937 $self->ensure_connected;
942 # this is the internal "get dbh or connect (don't check)" method
945 $self->_preserve_foreign_dbh;
946 $self->_populate_dbh unless $self->_dbh;
950 sub _sql_maker_args {
955 array_datatypes => 1,
956 limit_dialect => $self->_get_dbh,
957 %{$self->_sql_maker_opts}
963 unless ($self->_sql_maker) {
964 my $sql_maker_class = $self->sql_maker_class;
965 $self->ensure_class_loaded ($sql_maker_class);
966 $self->_sql_maker($sql_maker_class->new( $self->_sql_maker_args ));
968 return $self->_sql_maker;
971 # nothing to do by default
978 my @info = @{$self->_dbi_connect_info || []};
979 $self->_dbh(undef); # in case ->connected failed we might get sent here
980 $self->_server_info_hash (undef);
981 $self->_dbh($self->_connect(@info));
983 $self->_conn_pid($$);
984 $self->_conn_tid(threads->tid) if $INC{'threads.pm'};
986 $self->_determine_driver;
988 # Always set the transaction depth on connect, since
989 # there is no transaction in progress by definition
990 $self->{transaction_depth} = $self->_dbh_autocommit ? 0 : 1;
992 $self->_run_connection_actions unless $self->{_in_determine_driver};
995 sub _run_connection_actions {
999 push @actions, ( $self->on_connect_call || () );
1000 push @actions, $self->_parse_connect_do ('on_connect_do');
1002 $self->_do_connection_actions(connect_call_ => $_) for @actions;
1008 unless ($self->_server_info_hash) {
1012 my $server_version = try { $self->_get_server_version };
1014 if (defined $server_version) {
1015 $info{dbms_version} = $server_version;
1017 my ($numeric_version) = $server_version =~ /^([\d\.]+)/;
1018 my @verparts = split (/\./, $numeric_version);
1024 # consider only up to 3 version parts, iff not more than 3 digits
1026 while (@verparts && @use_parts < 3) {
1027 my $p = shift @verparts;
1029 push @use_parts, $p;
1031 push @use_parts, 0 while @use_parts < 3;
1033 $info{normalized_dbms_version} = sprintf "%d.%03d%03d", @use_parts;
1037 $self->_server_info_hash(\%info);
1040 return $self->_server_info_hash
1043 sub _get_server_version {
1044 shift->_get_dbh->get_info(18);
1047 sub _determine_driver {
1050 if ((not $self->_driver_determined) && (not $self->{_in_determine_driver})) {
1051 my $started_connected = 0;
1052 local $self->{_in_determine_driver} = 1;
1054 if (ref($self) eq __PACKAGE__) {
1056 if ($self->_dbh) { # we are connected
1057 $driver = $self->_dbh->{Driver}{Name};
1058 $started_connected = 1;
1060 # if connect_info is a CODEREF, we have no choice but to connect
1061 if (ref $self->_dbi_connect_info->[0] &&
1062 reftype $self->_dbi_connect_info->[0] eq 'CODE') {
1063 $self->_populate_dbh;
1064 $driver = $self->_dbh->{Driver}{Name};
1067 # try to use dsn to not require being connected, the driver may still
1068 # force a connection in _rebless to determine version
1069 # (dsn may not be supplied at all if all we do is make a mock-schema)
1070 my $dsn = $self->_dbi_connect_info->[0] || $ENV{DBI_DSN} || '';
1071 ($driver) = $dsn =~ /dbi:([^:]+):/i;
1072 $driver ||= $ENV{DBI_DRIVER};
1077 my $storage_class = "DBIx::Class::Storage::DBI::${driver}";
1078 if ($self->load_optional_class($storage_class)) {
1079 mro::set_mro($storage_class, 'c3');
1080 bless $self, $storage_class;
1086 $self->_driver_determined(1);
1088 $self->_init; # run driver-specific initializations
1090 $self->_run_connection_actions
1091 if !$started_connected && defined $self->_dbh;
1095 sub _do_connection_actions {
1097 my $method_prefix = shift;
1100 if (not ref($call)) {
1101 my $method = $method_prefix . $call;
1103 } elsif (ref($call) eq 'CODE') {
1105 } elsif (ref($call) eq 'ARRAY') {
1106 if (ref($call->[0]) ne 'ARRAY') {
1107 $self->_do_connection_actions($method_prefix, $_) for @$call;
1109 $self->_do_connection_actions($method_prefix, @$_) for @$call;
1112 $self->throw_exception (sprintf ("Don't know how to process conection actions of type '%s'", ref($call)) );
1118 sub connect_call_do_sql {
1120 $self->_do_query(@_);
1123 sub disconnect_call_do_sql {
1125 $self->_do_query(@_);
1128 # override in db-specific backend when necessary
1129 sub connect_call_datetime_setup { 1 }
1132 my ($self, $action) = @_;
1134 if (ref $action eq 'CODE') {
1135 $action = $action->($self);
1136 $self->_do_query($_) foreach @$action;
1139 # Most debuggers expect ($sql, @bind), so we need to exclude
1140 # the attribute hash which is the second argument to $dbh->do
1141 # furthermore the bind values are usually to be presented
1142 # as named arrayref pairs, so wrap those here too
1143 my @do_args = (ref $action eq 'ARRAY') ? (@$action) : ($action);
1144 my $sql = shift @do_args;
1145 my $attrs = shift @do_args;
1146 my @bind = map { [ undef, $_ ] } @do_args;
1148 $self->_query_start($sql, @bind);
1149 $self->_get_dbh->do($sql, $attrs, @do_args);
1150 $self->_query_end($sql, @bind);
1157 my ($self, @info) = @_;
1159 $self->throw_exception("You failed to provide any connection info")
1162 my ($old_connect_via, $dbh);
1164 if ($INC{'Apache/DBI.pm'} && $ENV{MOD_PERL}) {
1165 $old_connect_via = $DBI::connect_via;
1166 $DBI::connect_via = 'connect';
1170 if(ref $info[0] eq 'CODE') {
1171 $dbh = $info[0]->();
1174 $dbh = DBI->connect(@info);
1181 unless ($self->unsafe) {
1183 # this odd anonymous coderef dereference is in fact really
1184 # necessary to avoid the unwanted effect described in perl5
1187 my $weak_self = $_[0];
1190 $_[1]->{HandleError} = sub {
1192 $weak_self->throw_exception("DBI Exception: $_[0]");
1195 # the handler may be invoked by something totally out of
1197 croak ("DBI Exception (unhandled by DBIC, ::Schema GCed): $_[0]");
1202 $dbh->{ShowErrorStatement} = 1;
1203 $dbh->{RaiseError} = 1;
1204 $dbh->{PrintError} = 0;
1208 $self->throw_exception("DBI Connection failed: $_")
1211 $DBI::connect_via = $old_connect_via if $old_connect_via;
1214 $self->_dbh_autocommit($dbh->{AutoCommit});
1219 my ($self, $name) = @_;
1221 $name = $self->_svp_generate_name
1222 unless defined $name;
1224 $self->throw_exception ("You can't use savepoints outside a transaction")
1225 if $self->{transaction_depth} == 0;
1227 $self->throw_exception ("Your Storage implementation doesn't support savepoints")
1228 unless $self->can('_svp_begin');
1230 push @{ $self->{savepoints} }, $name;
1232 $self->debugobj->svp_begin($name) if $self->debug;
1234 return $self->_svp_begin($name);
1238 my ($self, $name) = @_;
1240 $self->throw_exception ("You can't use savepoints outside a transaction")
1241 if $self->{transaction_depth} == 0;
1243 $self->throw_exception ("Your Storage implementation doesn't support savepoints")
1244 unless $self->can('_svp_release');
1246 if (defined $name) {
1247 $self->throw_exception ("Savepoint '$name' does not exist")
1248 unless grep { $_ eq $name } @{ $self->{savepoints} };
1250 # Dig through the stack until we find the one we are releasing. This keeps
1251 # the stack up to date.
1254 do { $svp = pop @{ $self->{savepoints} } } while $svp ne $name;
1256 $name = pop @{ $self->{savepoints} };
1259 $self->debugobj->svp_release($name) if $self->debug;
1261 return $self->_svp_release($name);
1265 my ($self, $name) = @_;
1267 $self->throw_exception ("You can't use savepoints outside a transaction")
1268 if $self->{transaction_depth} == 0;
1270 $self->throw_exception ("Your Storage implementation doesn't support savepoints")
1271 unless $self->can('_svp_rollback');
1273 if (defined $name) {
1274 # If they passed us a name, verify that it exists in the stack
1275 unless(grep({ $_ eq $name } @{ $self->{savepoints} })) {
1276 $self->throw_exception("Savepoint '$name' does not exist!");
1279 # Dig through the stack until we find the one we are releasing. This keeps
1280 # the stack up to date.
1281 while(my $s = pop(@{ $self->{savepoints} })) {
1282 last if($s eq $name);
1284 # Add the savepoint back to the stack, as a rollback doesn't remove the
1285 # named savepoint, only everything after it.
1286 push(@{ $self->{savepoints} }, $name);
1288 # We'll assume they want to rollback to the last savepoint
1289 $name = $self->{savepoints}->[-1];
1292 $self->debugobj->svp_rollback($name) if $self->debug;
1294 return $self->_svp_rollback($name);
1297 sub _svp_generate_name {
1300 return 'savepoint_'.scalar(@{ $self->{'savepoints'} });
1306 # this means we have not yet connected and do not know the AC status
1307 # (e.g. coderef $dbh)
1308 $self->ensure_connected if (! defined $self->_dbh_autocommit);
1310 if($self->{transaction_depth} == 0) {
1311 $self->debugobj->txn_begin()
1313 $self->_dbh_begin_work;
1315 elsif ($self->auto_savepoint) {
1318 $self->{transaction_depth}++;
1321 sub _dbh_begin_work {
1324 # if the user is utilizing txn_do - good for him, otherwise we need to
1325 # ensure that the $dbh is healthy on BEGIN.
1326 # We do this via ->dbh_do instead of ->dbh, so that the ->dbh "ping"
1327 # will be replaced by a failure of begin_work itself (which will be
1328 # then retried on reconnect)
1329 if ($self->{_in_dbh_do}) {
1330 $self->_dbh->begin_work;
1332 $self->dbh_do(sub { $_[1]->begin_work });
1338 if ($self->{transaction_depth} == 1) {
1339 $self->debugobj->txn_commit()
1342 $self->{transaction_depth} = 0
1343 if $self->_dbh_autocommit;
1345 elsif($self->{transaction_depth} > 1) {
1346 $self->{transaction_depth}--;
1348 if $self->auto_savepoint;
1354 my $dbh = $self->_dbh
1355 or $self->throw_exception('cannot COMMIT on a disconnected handle');
1361 my $dbh = $self->_dbh;
1363 if ($self->{transaction_depth} == 1) {
1364 $self->debugobj->txn_rollback()
1366 $self->{transaction_depth} = 0
1367 if $self->_dbh_autocommit;
1368 $self->_dbh_rollback;
1370 elsif($self->{transaction_depth} > 1) {
1371 $self->{transaction_depth}--;
1372 if ($self->auto_savepoint) {
1373 $self->svp_rollback;
1378 die DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION->new;
1382 my $exception_class = "DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION";
1384 if ($_ !~ /$exception_class/) {
1385 # ensure that a failed rollback resets the transaction depth
1386 $self->{transaction_depth} = $self->_dbh_autocommit ? 0 : 1;
1389 $self->throw_exception($_)
1395 my $dbh = $self->_dbh
1396 or $self->throw_exception('cannot ROLLBACK on a disconnected handle');
1400 # This used to be the top-half of _execute. It was split out to make it
1401 # easier to override in NoBindVars without duping the rest. It takes up
1402 # all of _execute's args, and emits $sql, @bind.
1403 sub _prep_for_execute {
1404 my ($self, $op, $extra_bind, $ident, $args) = @_;
1406 if( blessed $ident && $ident->isa("DBIx::Class::ResultSource") ) {
1407 $ident = $ident->from();
1410 my ($sql, @bind) = $self->sql_maker->$op($ident, @$args);
1413 map { ref $_ eq 'ARRAY' ? $_ : [ '!!dummy', $_ ] } @$extra_bind)
1415 return ($sql, \@bind);
1419 sub _fix_bind_params {
1420 my ($self, @bind) = @_;
1422 ### Turn @bind from something like this:
1423 ### ( [ "artist", 1 ], [ "cdid", 1, 3 ] )
1425 ### ( "'1'", "'1'", "'3'" )
1428 if ( defined( $_ && $_->[1] ) ) {
1429 map { qq{'$_'}; } @{$_}[ 1 .. $#$_ ];
1436 my ( $self, $sql, @bind ) = @_;
1438 if ( $self->debug ) {
1439 @bind = $self->_fix_bind_params(@bind);
1441 $self->debugobj->query_start( $sql, @bind );
1446 my ( $self, $sql, @bind ) = @_;
1448 if ( $self->debug ) {
1449 @bind = $self->_fix_bind_params(@bind);
1450 $self->debugobj->query_end( $sql, @bind );
1455 my ($self, $dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_;
1457 my ($sql, $bind) = $self->_prep_for_execute($op, $extra_bind, $ident, \@args);
1459 $self->_query_start( $sql, @$bind );
1461 my $sth = $self->sth($sql,$op);
1463 my $placeholder_index = 1;
1465 foreach my $bound (@$bind) {
1466 my $attributes = {};
1467 my($column_name, @data) = @$bound;
1469 if ($bind_attributes) {
1470 $attributes = $bind_attributes->{$column_name}
1471 if defined $bind_attributes->{$column_name};
1474 foreach my $data (@data) {
1475 my $ref = ref $data;
1476 $data = $ref && $ref ne 'ARRAY' ? ''.$data : $data; # stringify args (except arrayrefs)
1478 $sth->bind_param($placeholder_index, $data, $attributes);
1479 $placeholder_index++;
1483 # Can this fail without throwing an exception anyways???
1484 my $rv = $sth->execute();
1485 $self->throw_exception(
1486 $sth->errstr || $sth->err || 'Unknown error: execute() returned false, but error flags were not set...'
1489 $self->_query_end( $sql, @$bind );
1491 return (wantarray ? ($rv, $sth, @$bind) : $rv);
1496 $self->dbh_do('_dbh_execute', @_); # retry over disconnects
1499 sub _prefetch_insert_auto_nextvals {
1500 my ($self, $source, $to_insert) = @_;
1504 foreach my $col ( $source->columns ) {
1505 if ( !defined $to_insert->{$col} ) {
1506 my $col_info = $source->column_info($col);
1508 if ( $col_info->{auto_nextval} ) {
1509 $upd->{$col} = $to_insert->{$col} = $self->_sequence_fetch(
1511 $col_info->{sequence} ||=
1512 $self->_dbh_get_autoinc_seq($self->_get_dbh, $source, $col)
1523 my ($source, $to_insert, $opts) = @_;
1525 my $updated_cols = $self->_prefetch_insert_auto_nextvals (@_);
1527 my $bind_attributes = $self->source_bind_attributes($source);
1529 my ($rv, $sth) = $self->_execute('insert' => [], $source, $bind_attributes, $to_insert, $opts);
1531 if ($opts->{returning}) {
1532 my @ret_cols = @{$opts->{returning}};
1534 my @ret_vals = try {
1535 local $SIG{__WARN__} = sub {};
1536 my @r = $sth->fetchrow_array;
1542 @ret{@ret_cols} = @ret_vals if (@ret_vals);
1550 return $updated_cols;
1553 ## Currently it is assumed that all values passed will be "normal", i.e. not
1554 ## scalar refs, or at least, all the same type as the first set, the statement is
1555 ## only prepped once.
1557 my ($self, $source, $cols, $data) = @_;
1560 @colvalues{@$cols} = (0..$#$cols);
1562 for my $i (0..$#$cols) {
1563 my $first_val = $data->[0][$i];
1564 next unless ref $first_val eq 'SCALAR';
1566 $colvalues{ $cols->[$i] } = $first_val;
1569 # check for bad data and stringify stringifiable objects
1570 my $bad_slice = sub {
1571 my ($msg, $col_idx, $slice_idx) = @_;
1572 $self->throw_exception(sprintf "%s for column '%s' in populate slice:\n%s",
1576 local $Data::Dumper::Maxdepth = 1; # don't dump objects, if any
1578 map { $cols->[$_] => $data->[$slice_idx][$_] } (0 .. $#$cols)
1584 for my $datum_idx (0..$#$data) {
1585 my $datum = $data->[$datum_idx];
1587 for my $col_idx (0..$#$cols) {
1588 my $val = $datum->[$col_idx];
1589 my $sqla_bind = $colvalues{ $cols->[$col_idx] };
1590 my $is_literal_sql = (ref $sqla_bind) eq 'SCALAR';
1592 if ($is_literal_sql) {
1594 $bad_slice->('bind found where literal SQL expected', $col_idx, $datum_idx);
1596 elsif ((my $reftype = ref $val) ne 'SCALAR') {
1597 $bad_slice->("$reftype reference found where literal SQL expected",
1598 $col_idx, $datum_idx);
1600 elsif ($$val ne $$sqla_bind){
1601 $bad_slice->("inconsistent literal SQL value, expecting: '$$sqla_bind'",
1602 $col_idx, $datum_idx);
1605 elsif (my $reftype = ref $val) {
1607 if (overload::Method($val, '""')) {
1608 $datum->[$col_idx] = "".$val;
1611 $bad_slice->("$reftype reference found where bind expected",
1612 $col_idx, $datum_idx);
1618 my ($sql, $bind) = $self->_prep_for_execute (
1619 'insert', undef, $source, [\%colvalues]
1623 my $empty_bind = 1 if (not @bind) &&
1624 (grep { ref $_ eq 'SCALAR' } values %colvalues) == @$cols;
1626 if ((not @bind) && (not $empty_bind)) {
1627 $self->throw_exception(
1628 'Cannot insert_bulk without support for placeholders'
1632 # neither _execute_array, nor _execute_inserts_with_no_binds are
1633 # atomic (even if _execute _array is a single call). Thus a safety
1635 my $guard = $self->txn_scope_guard;
1637 $self->_query_start( $sql, [ dummy => '__BULK_INSERT__' ] );
1638 my $sth = $self->sth($sql);
1641 # bind_param_array doesn't work if there are no binds
1642 $self->_dbh_execute_inserts_with_no_binds( $sth, scalar @$data );
1645 # @bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args
1646 $self->_execute_array( $source, $sth, \@bind, $cols, $data );
1650 $self->_query_end( $sql, [ dummy => '__BULK_INSERT__' ] );
1654 return (wantarray ? ($rv, $sth, @bind) : $rv);
1657 sub _execute_array {
1658 my ($self, $source, $sth, $bind, $cols, $data, @extra) = @_;
1660 ## This must be an arrayref, else nothing works!
1661 my $tuple_status = [];
1663 ## Get the bind_attributes, if any exist
1664 my $bind_attributes = $self->source_bind_attributes($source);
1666 ## Bind the values and execute
1667 my $placeholder_index = 1;
1669 foreach my $bound (@$bind) {
1671 my $attributes = {};
1672 my ($column_name, $data_index) = @$bound;
1674 if( $bind_attributes ) {
1675 $attributes = $bind_attributes->{$column_name}
1676 if defined $bind_attributes->{$column_name};
1679 my @data = map { $_->[$data_index] } @$data;
1681 $sth->bind_param_array(
1684 (%$attributes ? $attributes : ()),
1686 $placeholder_index++;
1691 $rv = $self->_dbh_execute_array($sth, $tuple_status, @extra);
1697 # Statement must finish even if there was an exception.
1702 $err = shift unless defined $err
1707 if (! defined $err and $sth->err);
1711 ++$i while $i <= $#$tuple_status && !ref $tuple_status->[$i];
1713 $self->throw_exception("Unexpected populate error: $err")
1714 if ($i > $#$tuple_status);
1716 $self->throw_exception(sprintf "%s for populate slice:\n%s",
1717 ($tuple_status->[$i][1] || $err),
1718 Dumper { map { $cols->[$_] => $data->[$i][$_] } (0 .. $#$cols) },
1725 sub _dbh_execute_array {
1726 my ($self, $sth, $tuple_status, @extra) = @_;
1728 return $sth->execute_array({ArrayTupleStatus => $tuple_status});
1731 sub _dbh_execute_inserts_with_no_binds {
1732 my ($self, $sth, $count) = @_;
1736 my $dbh = $self->_get_dbh;
1737 local $dbh->{RaiseError} = 1;
1738 local $dbh->{PrintError} = 0;
1740 $sth->execute foreach 1..$count;
1746 # Make sure statement is finished even if there was an exception.
1751 $err = shift unless defined $err;
1755 $self->throw_exception($err) if defined $err;
1761 my ($self, $source, @args) = @_;
1763 my $bind_attrs = $self->source_bind_attributes($source);
1765 return $self->_execute('update' => [], $source, $bind_attrs, @args);
1770 my ($self, $source, @args) = @_;
1772 my $bind_attrs = $self->source_bind_attributes($source);
1774 return $self->_execute('delete' => [], $source, $bind_attrs, @args);
1777 # We were sent here because the $rs contains a complex search
1778 # which will require a subquery to select the correct rows
1779 # (i.e. joined or limited resultsets, or non-introspectable conditions)
1781 # Generating a single PK column subquery is trivial and supported
1782 # by all RDBMS. However if we have a multicolumn PK, things get ugly.
1783 # Look at _multipk_update_delete()
1784 sub _subq_update_delete {
1786 my ($rs, $op, $values) = @_;
1788 my $rsrc = $rs->result_source;
1790 # quick check if we got a sane rs on our hands
1791 my @pcols = $rsrc->_pri_cols;
1793 my $sel = $rs->_resolved_attrs->{select};
1794 $sel = [ $sel ] unless ref $sel eq 'ARRAY';
1797 join ("\x00", map { join '.', $rs->{attrs}{alias}, $_ } sort @pcols)
1799 join ("\x00", sort @$sel )
1801 $self->throw_exception (
1802 '_subq_update_delete can not be called on resultsets selecting columns other than the primary keys'
1809 $op eq 'update' ? $values : (),
1810 { $pcols[0] => { -in => $rs->as_query } },
1815 return $self->_multipk_update_delete (@_);
1819 # ANSI SQL does not provide a reliable way to perform a multicol-PK
1820 # resultset update/delete involving subqueries. So by default resort
1821 # to simple (and inefficient) delete_all style per-row opearations,
1822 # while allowing specific storages to override this with a faster
1825 sub _multipk_update_delete {
1826 return shift->_per_row_update_delete (@_);
1829 # This is the default loop used to delete/update rows for multi PK
1830 # resultsets, and used by mysql exclusively (because it can't do anything
1833 # We do not use $row->$op style queries, because resultset update/delete
1834 # is not expected to cascade (this is what delete_all/update_all is for).
1836 # There should be no race conditions as the entire operation is rolled
1839 sub _per_row_update_delete {
1841 my ($rs, $op, $values) = @_;
1843 my $rsrc = $rs->result_source;
1844 my @pcols = $rsrc->_pri_cols;
1846 my $guard = $self->txn_scope_guard;
1848 # emulate the return value of $sth->execute for non-selects
1849 my $row_cnt = '0E0';
1851 my $subrs_cur = $rs->cursor;
1852 my @all_pk = $subrs_cur->all;
1853 for my $pks ( @all_pk) {
1856 for my $i (0.. $#pcols) {
1857 $cond->{$pcols[$i]} = $pks->[$i];
1862 $op eq 'update' ? $values : (),
1876 $self->_execute($self->_select_args(@_));
1879 sub _select_args_to_query {
1882 # my ($op, $bind, $ident, $bind_attrs, $select, $cond, $rs_attrs, $rows, $offset)
1883 # = $self->_select_args($ident, $select, $cond, $attrs);
1884 my ($op, $bind, $ident, $bind_attrs, @args) =
1885 $self->_select_args(@_);
1887 # my ($sql, $prepared_bind) = $self->_prep_for_execute($op, $bind, $ident, [ $select, $cond, $rs_attrs, $rows, $offset ]);
1888 my ($sql, $prepared_bind) = $self->_prep_for_execute($op, $bind, $ident, \@args);
1889 $prepared_bind ||= [];
1892 ? ($sql, $prepared_bind, $bind_attrs)
1893 : \[ "($sql)", @$prepared_bind ]
1898 my ($self, $ident, $select, $where, $attrs) = @_;
1900 my $sql_maker = $self->sql_maker;
1901 my ($alias2source, $rs_alias) = $self->_resolve_ident_sources ($ident);
1908 $rs_alias && $alias2source->{$rs_alias}
1909 ? ( _rsroot_source_handle => $alias2source->{$rs_alias}->handle )
1914 # calculate bind_attrs before possible $ident mangling
1915 my $bind_attrs = {};
1916 for my $alias (keys %$alias2source) {
1917 my $bindtypes = $self->source_bind_attributes ($alias2source->{$alias}) || {};
1918 for my $col (keys %$bindtypes) {
1920 my $fqcn = join ('.', $alias, $col);
1921 $bind_attrs->{$fqcn} = $bindtypes->{$col} if $bindtypes->{$col};
1923 # Unqialified column names are nice, but at the same time can be
1924 # rather ambiguous. What we do here is basically go along with
1925 # the loop, adding an unqualified column slot to $bind_attrs,
1926 # alongside the fully qualified name. As soon as we encounter
1927 # another column by that name (which would imply another table)
1928 # we unset the unqualified slot and never add any info to it
1929 # to avoid erroneous type binding. If this happens the users
1930 # only choice will be to fully qualify his column name
1932 if (exists $bind_attrs->{$col}) {
1933 $bind_attrs->{$col} = {};
1936 $bind_attrs->{$col} = $bind_attrs->{$fqcn};
1942 if (defined $attrs->{rows}) {
1943 $self->throw_exception("rows attribute must be positive if present")
1944 unless $attrs->{rows} > 0;
1946 elsif (defined $attrs->{offset}) {
1947 # MySQL actually recommends this approach. I cringe.
1948 $attrs->{rows} = $sql_maker->__max_int;
1953 # see if we need to tear the prefetch apart otherwise delegate the limiting to the
1954 # storage, unless software limit was requested
1957 ( $attrs->{rows} && keys %{$attrs->{collapse}} )
1959 # grouped prefetch (to satisfy group_by == select)
1960 ( $attrs->{group_by}
1962 @{$attrs->{group_by}}
1964 $attrs->{_prefetch_select}
1966 @{$attrs->{_prefetch_select}}
1969 ($ident, $select, $where, $attrs)
1970 = $self->_adjust_select_args_for_complex_prefetch ($ident, $select, $where, $attrs);
1972 elsif (! $attrs->{software_limit} ) {
1973 push @limit, $attrs->{rows}, $attrs->{offset};
1976 # try to simplify the joinmap further (prune unreferenced type-single joins)
1977 $ident = $self->_prune_unused_joins ($ident, $select, $where, $attrs);
1980 # This would be the point to deflate anything found in $where
1981 # (and leave $attrs->{bind} intact). Problem is - inflators historically
1982 # expect a row object. And all we have is a resultsource (it is trivial
1983 # to extract deflator coderefs via $alias2source above).
1985 # I don't see a way forward other than changing the way deflators are
1986 # invoked, and that's just bad...
1989 return ('select', $attrs->{bind}, $ident, $bind_attrs, $select, $where, $attrs, @limit);
1992 # Returns a counting SELECT for a simple count
1993 # query. Abstracted so that a storage could override
1994 # this to { count => 'firstcol' } or whatever makes
1995 # sense as a performance optimization
1997 #my ($self, $source, $rs_attrs) = @_;
1998 return { count => '*' };
2002 sub source_bind_attributes {
2003 my ($self, $source) = @_;
2005 my $bind_attributes;
2006 foreach my $column ($source->columns) {
2008 my $data_type = $source->column_info($column)->{data_type} || '';
2009 $bind_attributes->{$column} = $self->bind_attribute_by_data_type($data_type)
2013 return $bind_attributes;
2020 =item Arguments: $ident, $select, $condition, $attrs
2024 Handle a SQL select statement.
2030 my ($ident, $select, $condition, $attrs) = @_;
2031 return $self->cursor_class->new($self, \@_, $attrs);
2036 my ($rv, $sth, @bind) = $self->_select(@_);
2037 my @row = $sth->fetchrow_array;
2038 my @nextrow = $sth->fetchrow_array if @row;
2039 if(@row && @nextrow) {
2040 carp "Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single";
2042 # Need to call finish() to work round broken DBDs
2051 =item Arguments: $sql
2055 Returns a L<DBI> sth (statement handle) for the supplied SQL.
2060 my ($self, $dbh, $sql) = @_;
2062 # 3 is the if_active parameter which avoids active sth re-use
2063 my $sth = $self->disable_sth_caching
2064 ? $dbh->prepare($sql)
2065 : $dbh->prepare_cached($sql, {}, 3);
2067 # XXX You would think RaiseError would make this impossible,
2068 # but apparently that's not true :(
2069 $self->throw_exception($dbh->errstr) if !$sth;
2075 my ($self, $sql) = @_;
2076 $self->dbh_do('_dbh_sth', $sql); # retry over disconnects
2079 sub _dbh_columns_info_for {
2080 my ($self, $dbh, $table) = @_;
2082 if ($dbh->can('column_info')) {
2086 my ($schema,$tab) = $table =~ /^(.+?)\.(.+)$/ ? ($1,$2) : (undef,$table);
2087 my $sth = $dbh->column_info( undef,$schema, $tab, '%' );
2089 while ( my $info = $sth->fetchrow_hashref() ){
2091 $column_info{data_type} = $info->{TYPE_NAME};
2092 $column_info{size} = $info->{COLUMN_SIZE};
2093 $column_info{is_nullable} = $info->{NULLABLE} ? 1 : 0;
2094 $column_info{default_value} = $info->{COLUMN_DEF};
2095 my $col_name = $info->{COLUMN_NAME};
2096 $col_name =~ s/^\"(.*)\"$/$1/;
2098 $result{$col_name} = \%column_info;
2103 return \%result if !$caught && scalar keys %result;
2107 my $sth = $dbh->prepare($self->sql_maker->select($table, undef, \'1 = 0'));
2109 my @columns = @{$sth->{NAME_lc}};
2110 for my $i ( 0 .. $#columns ){
2112 $column_info{data_type} = $sth->{TYPE}->[$i];
2113 $column_info{size} = $sth->{PRECISION}->[$i];
2114 $column_info{is_nullable} = $sth->{NULLABLE}->[$i] ? 1 : 0;
2116 if ($column_info{data_type} =~ m/^(.*?)\((.*?)\)$/) {
2117 $column_info{data_type} = $1;
2118 $column_info{size} = $2;
2121 $result{$columns[$i]} = \%column_info;
2125 foreach my $col (keys %result) {
2126 my $colinfo = $result{$col};
2127 my $type_num = $colinfo->{data_type};
2129 if(defined $type_num && $dbh->can('type_info')) {
2130 my $type_info = $dbh->type_info($type_num);
2131 $type_name = $type_info->{TYPE_NAME} if $type_info;
2132 $colinfo->{data_type} = $type_name if $type_name;
2139 sub columns_info_for {
2140 my ($self, $table) = @_;
2141 $self->_dbh_columns_info_for ($self->_get_dbh, $table);
2144 =head2 last_insert_id
2146 Return the row id of the last insert.
2150 sub _dbh_last_insert_id {
2151 my ($self, $dbh, $source, $col) = @_;
2153 my $id = try { $dbh->last_insert_id (undef, undef, $source->name, $col) };
2155 return $id if defined $id;
2157 my $class = ref $self;
2158 $self->throw_exception ("No storage specific _dbh_last_insert_id() method implemented in $class, and the generic DBI::last_insert_id() failed");
2161 sub last_insert_id {
2163 $self->_dbh_last_insert_id ($self->_dbh, @_);
2166 =head2 _native_data_type
2170 =item Arguments: $type_name
2174 This API is B<EXPERIMENTAL>, will almost definitely change in the future, and
2175 currently only used by L<::AutoCast|DBIx::Class::Storage::DBI::AutoCast> and
2176 L<::Sybase::ASE|DBIx::Class::Storage::DBI::Sybase::ASE>.
2178 The default implementation returns C<undef>, implement in your Storage driver if
2179 you need this functionality.
2181 Should map types from other databases to the native RDBMS type, for example
2182 C<VARCHAR2> to C<VARCHAR>.
2184 Types with modifiers should map to the underlying data type. For example,
2185 C<INTEGER AUTO_INCREMENT> should become C<INTEGER>.
2187 Composite types should map to the container type, for example
2188 C<ENUM(foo,bar,baz)> becomes C<ENUM>.
2192 sub _native_data_type {
2193 #my ($self, $data_type) = @_;
2197 # Check if placeholders are supported at all
2198 sub _placeholders_supported {
2200 my $dbh = $self->_get_dbh;
2202 # some drivers provide a $dbh attribute (e.g. Sybase and $dbh->{syb_dynamic_supported})
2203 # but it is inaccurate more often than not
2205 local $dbh->{PrintError} = 0;
2206 local $dbh->{RaiseError} = 1;
2207 $dbh->do('select ?', {}, 1);
2215 # Check if placeholders bound to non-string types throw exceptions
2217 sub _typeless_placeholders_supported {
2219 my $dbh = $self->_get_dbh;
2222 local $dbh->{PrintError} = 0;
2223 local $dbh->{RaiseError} = 1;
2224 # this specifically tests a bind that is NOT a string
2225 $dbh->do('select 1 where 1 = ?', {}, 1);
2235 Returns the database driver name.
2240 shift->_get_dbh->{Driver}->{Name};
2243 =head2 bind_attribute_by_data_type
2245 Given a datatype from column info, returns a database specific bind
2246 attribute for C<< $dbh->bind_param($val,$attribute) >> or nothing if we will
2247 let the database planner just handle it.
2249 Generally only needed for special case column types, like bytea in postgres.
2253 sub bind_attribute_by_data_type {
2257 =head2 is_datatype_numeric
2259 Given a datatype from column_info, returns a boolean value indicating if
2260 the current RDBMS considers it a numeric value. This controls how
2261 L<DBIx::Class::Row/set_column> decides whether to mark the column as
2262 dirty - when the datatype is deemed numeric a C<< != >> comparison will
2263 be performed instead of the usual C<eq>.
2267 sub is_datatype_numeric {
2268 my ($self, $dt) = @_;
2270 return 0 unless $dt;
2272 return $dt =~ /^ (?:
2273 numeric | int(?:eger)? | (?:tiny|small|medium|big)int | dec(?:imal)? | real | float | double (?: \s+ precision)? | (?:big)?serial
2278 =head2 create_ddl_dir
2282 =item Arguments: $schema \@databases, $version, $directory, $preversion, \%sqlt_args
2286 Creates a SQL file based on the Schema, for each of the specified
2287 database engines in C<\@databases> in the given directory.
2288 (note: specify L<SQL::Translator> names, not L<DBI> driver names).
2290 Given a previous version number, this will also create a file containing
2291 the ALTER TABLE statements to transform the previous schema into the
2292 current one. Note that these statements may contain C<DROP TABLE> or
2293 C<DROP COLUMN> statements that can potentially destroy data.
2295 The file names are created using the C<ddl_filename> method below, please
2296 override this method in your schema if you would like a different file
2297 name format. For the ALTER file, the same format is used, replacing
2298 $version in the name with "$preversion-$version".
2300 See L<SQL::Translator/METHODS> for a list of values for C<\%sqlt_args>.
2301 The most common value for this would be C<< { add_drop_table => 1 } >>
2302 to have the SQL produced include a C<DROP TABLE> statement for each table
2303 created. For quoting purposes supply C<quote_table_names> and
2304 C<quote_field_names>.
2306 If no arguments are passed, then the following default values are assumed:
2310 =item databases - ['MySQL', 'SQLite', 'PostgreSQL']
2312 =item version - $schema->schema_version
2314 =item directory - './'
2316 =item preversion - <none>
2320 By default, C<\%sqlt_args> will have
2322 { add_drop_table => 1, ignore_constraint_names => 1, ignore_index_names => 1 }
2324 merged with the hash passed in. To disable any of those features, pass in a
2325 hashref like the following
2327 { ignore_constraint_names => 0, # ... other options }
2330 WARNING: You are strongly advised to check all SQL files created, before applying
2335 sub create_ddl_dir {
2336 my ($self, $schema, $databases, $version, $dir, $preversion, $sqltargs) = @_;
2339 carp "No directory given, using ./\n";
2344 make_path ("$dir") # make_path does not like objects (i.e. Path::Class::Dir)
2346 $self->throw_exception(
2347 "Failed to create '$dir': " . ($! || $@ || 'error unknow')
2351 $self->throw_exception ("Directory '$dir' does not exist\n") unless(-d $dir);
2353 $databases ||= ['MySQL', 'SQLite', 'PostgreSQL'];
2354 $databases = [ $databases ] if(ref($databases) ne 'ARRAY');
2356 my $schema_version = $schema->schema_version || '1.x';
2357 $version ||= $schema_version;
2360 add_drop_table => 1,
2361 ignore_constraint_names => 1,
2362 ignore_index_names => 1,
2366 unless (DBIx::Class::Optional::Dependencies->req_ok_for ('deploy')) {
2367 $self->throw_exception("Can't create a ddl file without " . DBIx::Class::Optional::Dependencies->req_missing_for ('deploy') );
2370 my $sqlt = SQL::Translator->new( $sqltargs );
2372 $sqlt->parser('SQL::Translator::Parser::DBIx::Class');
2373 my $sqlt_schema = $sqlt->translate({ data => $schema })
2374 or $self->throw_exception ($sqlt->error);
2376 foreach my $db (@$databases) {
2378 $sqlt->{schema} = $sqlt_schema;
2379 $sqlt->producer($db);
2382 my $filename = $schema->ddl_filename($db, $version, $dir);
2383 if (-e $filename && ($version eq $schema_version )) {
2384 # if we are dumping the current version, overwrite the DDL
2385 carp "Overwriting existing DDL file - $filename";
2389 my $output = $sqlt->translate;
2391 carp("Failed to translate to $db, skipping. (" . $sqlt->error . ")");
2394 if(!open($file, ">$filename")) {
2395 $self->throw_exception("Can't open $filename for writing ($!)");
2398 print $file $output;
2401 next unless ($preversion);
2403 require SQL::Translator::Diff;
2405 my $prefilename = $schema->ddl_filename($db, $preversion, $dir);
2406 if(!-e $prefilename) {
2407 carp("No previous schema file found ($prefilename)");
2411 my $difffile = $schema->ddl_filename($db, $version, $dir, $preversion);
2413 carp("Overwriting existing diff file - $difffile");
2419 my $t = SQL::Translator->new($sqltargs);
2424 or $self->throw_exception ($t->error);
2426 my $out = $t->translate( $prefilename )
2427 or $self->throw_exception ($t->error);
2429 $source_schema = $t->schema;
2431 $source_schema->name( $prefilename )
2432 unless ( $source_schema->name );
2435 # The "new" style of producers have sane normalization and can support
2436 # diffing a SQL file against a DBIC->SQLT schema. Old style ones don't
2437 # And we have to diff parsed SQL against parsed SQL.
2438 my $dest_schema = $sqlt_schema;
2440 unless ( "SQL::Translator::Producer::$db"->can('preprocess_schema') ) {
2441 my $t = SQL::Translator->new($sqltargs);
2446 or $self->throw_exception ($t->error);
2448 my $out = $t->translate( $filename )
2449 or $self->throw_exception ($t->error);
2451 $dest_schema = $t->schema;
2453 $dest_schema->name( $filename )
2454 unless $dest_schema->name;
2457 my $diff = SQL::Translator::Diff::schema_diff($source_schema, $db,
2461 if(!open $file, ">$difffile") {
2462 $self->throw_exception("Can't write to $difffile ($!)");
2470 =head2 deployment_statements
2474 =item Arguments: $schema, $type, $version, $directory, $sqlt_args
2478 Returns the statements used by L</deploy> and L<DBIx::Class::Schema/deploy>.
2480 The L<SQL::Translator> (not L<DBI>) database driver name can be explicitly
2481 provided in C<$type>, otherwise the result of L</sqlt_type> is used as default.
2483 C<$directory> is used to return statements from files in a previously created
2484 L</create_ddl_dir> directory and is optional. The filenames are constructed
2485 from L<DBIx::Class::Schema/ddl_filename>, the schema name and the C<$version>.
2487 If no C<$directory> is specified then the statements are constructed on the
2488 fly using L<SQL::Translator> and C<$version> is ignored.
2490 See L<SQL::Translator/METHODS> for a list of values for C<$sqlt_args>.
2494 sub deployment_statements {
2495 my ($self, $schema, $type, $version, $dir, $sqltargs) = @_;
2496 $type ||= $self->sqlt_type;
2497 $version ||= $schema->schema_version || '1.x';
2499 my $filename = $schema->ddl_filename($type, $version, $dir);
2503 open($file, "<$filename")
2504 or $self->throw_exception("Can't open $filename ($!)");
2507 return join('', @rows);
2510 unless (DBIx::Class::Optional::Dependencies->req_ok_for ('deploy') ) {
2511 $self->throw_exception("Can't deploy without a ddl_dir or " . DBIx::Class::Optional::Dependencies->req_missing_for ('deploy') );
2514 # sources needs to be a parser arg, but for simplicty allow at top level
2516 $sqltargs->{parser_args}{sources} = delete $sqltargs->{sources}
2517 if exists $sqltargs->{sources};
2519 my $tr = SQL::Translator->new(
2520 producer => "SQL::Translator::Producer::${type}",
2522 parser => 'SQL::Translator::Parser::DBIx::Class',
2529 @ret = $tr->translate;
2532 $ret[0] = $tr->translate;
2535 $self->throw_exception( 'Unable to produce deployment statements: ' . $tr->error)
2536 unless (@ret && defined $ret[0]);
2538 return $wa ? @ret : $ret[0];
2542 my ($self, $schema, $type, $sqltargs, $dir) = @_;
2545 return if($line =~ /^--/);
2547 # next if($line =~ /^DROP/m);
2548 return if($line =~ /^BEGIN TRANSACTION/m);
2549 return if($line =~ /^COMMIT/m);
2550 return if $line =~ /^\s+$/; # skip whitespace only
2551 $self->_query_start($line);
2553 # do a dbh_do cycle here, as we need some error checking in
2554 # place (even though we will ignore errors)
2555 $self->dbh_do (sub { $_[1]->do($line) });
2557 carp qq{$_ (running "${line}")};
2559 $self->_query_end($line);
2561 my @statements = $schema->deployment_statements($type, undef, $dir, { %{ $sqltargs || {} }, no_comments => 1 } );
2562 if (@statements > 1) {
2563 foreach my $statement (@statements) {
2564 $deploy->( $statement );
2567 elsif (@statements == 1) {
2568 foreach my $line ( split(";\n", $statements[0])) {
2574 =head2 datetime_parser
2576 Returns the datetime parser class
2580 sub datetime_parser {
2582 return $self->{datetime_parser} ||= do {
2583 $self->build_datetime_parser(@_);
2587 =head2 datetime_parser_type
2589 Defines (returns) the datetime parser class - currently hardwired to
2590 L<DateTime::Format::MySQL>
2594 sub datetime_parser_type { "DateTime::Format::MySQL"; }
2596 =head2 build_datetime_parser
2598 See L</datetime_parser>
2602 sub build_datetime_parser {
2604 my $type = $self->datetime_parser_type(@_);
2605 $self->ensure_class_loaded ($type);
2610 =head2 is_replicating
2612 A boolean that reports if a particular L<DBIx::Class::Storage::DBI> is set to
2613 replicate from a master database. Default is undef, which is the result
2614 returned by databases that don't support replication.
2618 sub is_replicating {
2623 =head2 lag_behind_master
2625 Returns a number that represents a certain amount of lag behind a master db
2626 when a given storage is replicating. The number is database dependent, but
2627 starts at zero and increases with the amount of lag. Default in undef
2631 sub lag_behind_master {
2635 =head2 relname_to_table_alias
2639 =item Arguments: $relname, $join_count
2643 L<DBIx::Class> uses L<DBIx::Class::Relationship> names as table aliases in
2646 This hook is to allow specific L<DBIx::Class::Storage> drivers to change the
2647 way these aliases are named.
2649 The default behavior is C<< "$relname_$join_count" if $join_count > 1 >>,
2650 otherwise C<"$relname">.
2654 sub relname_to_table_alias {
2655 my ($self, $relname, $join_count) = @_;
2657 my $alias = ($join_count && $join_count > 1 ?
2658 join('_', $relname, $join_count) : $relname);
2667 =head2 DBIx::Class and AutoCommit
2669 DBIx::Class can do some wonderful magic with handling exceptions,
2670 disconnections, and transactions when you use C<< AutoCommit => 1 >>
2671 (the default) combined with C<txn_do> for transaction support.
2673 If you set C<< AutoCommit => 0 >> in your connect info, then you are always
2674 in an assumed transaction between commits, and you're telling us you'd
2675 like to manage that manually. A lot of the magic protections offered by
2676 this module will go away. We can't protect you from exceptions due to database
2677 disconnects because we don't know anything about how to restart your
2678 transactions. You're on your own for handling all sorts of exceptional
2679 cases if you choose the C<< AutoCommit => 0 >> path, just as you would
2685 Matt S. Trout <mst@shadowcatsystems.co.uk>
2687 Andy Grundman <andy@hybridized.org>
2691 You may distribute this code under the same terms as Perl itself.