1 package DBIx::Class::Storage::DBI;
2 # -*- mode: cperl; cperl-indent-level: 2 -*-
4 use base 'DBIx::Class::Storage';
8 use Carp::Clan qw/^DBIx::Class/;
10 use DBIx::Class::Storage::DBI::Cursor;
11 use DBIx::Class::Storage::Statistics;
15 __PACKAGE__->mk_group_accessors('simple' =>
16 qw/_connect_info _dbi_connect_info _dbh _sql_maker _sql_maker_opts
17 _conn_pid _conn_tid transaction_depth _dbh_autocommit _on_connect_do
18 _on_disconnect_do savepoints/
21 # the values for these accessors are picked out (and deleted) from
22 # the attribute hashref passed to connect_info
23 my @storage_options = qw/
24 on_connect_call on_disconnect_call disable_sth_caching unsafe auto_savepoint
26 __PACKAGE__->mk_group_accessors('simple' => @storage_options);
29 # default cursor class, overridable in connect_info attributes
30 __PACKAGE__->cursor_class('DBIx::Class::Storage::DBI::Cursor');
32 __PACKAGE__->mk_group_accessors('inherited' => qw/sql_maker_class/);
33 __PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks');
38 DBIx::Class::Storage::DBI - DBI storage handler
42 my $schema = MySchema->connect('dbi:SQLite:my.db');
44 $schema->storage->debug(1);
45 $schema->dbh_do("DROP TABLE authors");
47 $schema->resultset('Book')->search({
48 written_on => $schema->storage->datetime_parser(DateTime->now)
53 This class represents the connection to an RDBMS via L<DBI>. See
54 L<DBIx::Class::Storage> for general information. This pod only
55 documents DBI-specific methods and behaviors.
62 my $new = shift->next::method(@_);
64 $new->transaction_depth(0);
65 $new->_sql_maker_opts({});
66 $new->{savepoints} = [];
67 $new->{_in_dbh_do} = 0;
75 This method is normally called by L<DBIx::Class::Schema/connection>, which
76 encapsulates its argument list in an arrayref before passing them here.
78 The argument list may contain:
84 The same 4-element argument set one would normally pass to
85 L<DBI/connect>, optionally followed by
86 L<extra attributes|/DBIx::Class specific connection attributes>
87 recognized by DBIx::Class:
89 $connect_info_args = [ $dsn, $user, $password, \%dbi_attributes?, \%extra_attributes? ];
93 A single code reference which returns a connected
94 L<DBI database handle|DBI/connect> optionally followed by
95 L<extra attributes|/DBIx::Class specific connection attributes> recognized
98 $connect_info_args = [ sub { DBI->connect (...) }, \%extra_attributes? ];
102 A single hashref with all the attributes and the dsn/user/password
105 $connect_info_args = [{
113 This is particularly useful for L<Catalyst> based applications, allowing the
114 following config (L<Config::General> style):
119 dsn dbi:mysql:database=test
128 Please note that the L<DBI> docs recommend that you always explicitly
129 set C<AutoCommit> to either I<0> or I<1>. L<DBIx::Class> further
130 recommends that it be set to I<1>, and that you perform transactions
131 via our L<DBIx::Class::Schema/txn_do> method. L<DBIx::Class> will set it
132 to I<1> if you do not do explicitly set it to zero. This is the default
133 for most DBDs. See L</DBIx::Class and AutoCommit> for details.
135 =head3 DBIx::Class specific connection attributes
137 In addition to the standard L<DBI|DBI/ATTRIBUTES_COMMON_TO_ALL_HANDLES>
138 L<connection|DBI/Database_Handle_Attributes> attributes, DBIx::Class recognizes
139 the following connection options. These options can be mixed in with your other
140 L<DBI> connection attributes, or placed in a seperate hashref
141 (C<\%extra_attributes>) as shown above.
143 Every time C<connect_info> is invoked, any previous settings for
144 these options will be cleared before setting the new ones, regardless of
145 whether any options are specified in the new C<connect_info>.
152 Specifies things to do immediately after connecting or re-connecting to
153 the database. Its value may contain:
159 This contains one SQL statement to execute.
161 =item an array reference
163 This contains SQL statements to execute in order. Each element contains
164 a string or a code reference that returns a string.
166 =item a code reference
168 This contains some code to execute. Unlike code references within an
169 array reference, its return value is ignored.
173 =item on_disconnect_do
175 Takes arguments in the same form as L</on_connect_do> and executes them
176 immediately before disconnecting from the database.
178 Note, this only runs if you explicitly call L</disconnect> on the
181 =item on_connect_call
183 A more generalized form of L</on_connect_do> that calls the specified
184 C<connect_call_METHOD> methods in your storage driver.
186 on_connect_do => 'select 1'
190 on_connect_call => [ [ do_sql => 'select 1' ] ]
192 Its values may contain:
198 Will call the C<connect_call_METHOD> method.
200 =item a code reference
202 Will execute C<< $code->($storage) >>
204 =item an array reference
206 Each value can be a method name or code reference.
208 =item an array of arrays
210 For each array, the first item is taken to be the C<connect_call_> method name
211 or code reference, and the rest are parameters to it.
215 Some predefined storage methods you may use:
221 Executes a SQL string or a code reference that returns a SQL string. This is
222 what L</on_connect_do> and L</on_disconnect_do> use.
230 Will execute the scalar as SQL.
234 Taken to be arguments to L<DBI/do>, the SQL string optionally followed by the
235 attributes hashref and bind values.
237 =item a code reference
239 Will execute C<< $code->($storage) >> and execute the return array refs as
244 =item set_datetime_format
246 Execute any statements necessary to initialize the database session to return
247 and accept datetime/timestamp values used with
248 L<DBIx::Class::InflateColumn::DateTime>.
252 =item on_disconnect_call
254 Takes arguments in the same form as L</on_connect_call> and executes them
255 immediately before disconnecting from the database.
257 Calls the C<disconnect_call_METHOD> methods as opposed to the
258 C<connect_call_METHOD> methods called by L</on_connect_call>.
260 Note, this only runs if you explicitly call L</disconnect> on the
263 =item disable_sth_caching
265 If set to a true value, this option will disable the caching of
266 statement handles via L<DBI/prepare_cached>.
270 Sets the limit dialect. This is useful for JDBC-bridge among others
271 where the remote SQL-dialect cannot be determined by the name of the
272 driver alone. See also L<SQL::Abstract::Limit>.
276 Specifies what characters to use to quote table and column names. If
277 you use this you will want to specify L</name_sep> as well.
279 C<quote_char> expects either a single character, in which case is it
280 is placed on either side of the table/column name, or an arrayref of length
281 2 in which case the table/column name is placed between the elements.
283 For example under MySQL you should use C<< quote_char => '`' >>, and for
284 SQL Server you should use C<< quote_char => [qw/[ ]/] >>.
288 This only needs to be used in conjunction with C<quote_char>, and is used to
289 specify the charecter that seperates elements (schemas, tables, columns) from
290 each other. In most cases this is simply a C<.>.
292 The consequences of not supplying this value is that L<SQL::Abstract>
293 will assume DBIx::Class' uses of aliases to be complete column
294 names. The output will look like I<"me.name"> when it should actually
299 This Storage driver normally installs its own C<HandleError>, sets
300 C<RaiseError> and C<ShowErrorStatement> on, and sets C<PrintError> off on
301 all database handles, including those supplied by a coderef. It does this
302 so that it can have consistent and useful error behavior.
304 If you set this option to a true value, Storage will not do its usual
305 modifications to the database handle's attributes, and instead relies on
306 the settings in your connect_info DBI options (or the values you set in
307 your connection coderef, in the case that you are connecting via coderef).
309 Note that your custom settings can cause Storage to malfunction,
310 especially if you set a C<HandleError> handler that suppresses exceptions
311 and/or disable C<RaiseError>.
315 If this option is true, L<DBIx::Class> will use savepoints when nesting
316 transactions, making it possible to recover from failure in the inner
317 transaction without having to abort all outer transactions.
321 Use this argument to supply a cursor class other than the default
322 L<DBIx::Class::Storage::DBI::Cursor>.
326 Some real-life examples of arguments to L</connect_info> and
327 L<DBIx::Class::Schema/connect>
329 # Simple SQLite connection
330 ->connect_info([ 'dbi:SQLite:./foo.db' ]);
333 ->connect_info([ sub { DBI->connect(...) } ]);
335 # A bit more complicated
342 { quote_char => q{"}, name_sep => q{.} },
346 # Equivalent to the previous example
352 { AutoCommit => 1, quote_char => q{"}, name_sep => q{.} },
356 # Same, but with hashref as argument
357 # See parse_connect_info for explanation
360 dsn => 'dbi:Pg:dbname=foo',
362 password => 'my_pg_password',
369 # Subref + DBIx::Class-specific connection options
372 sub { DBI->connect(...) },
376 on_connect_do => ['SET search_path TO myschema,otherschema,public'],
377 disable_sth_caching => 1,
387 my ($self, $info_arg) = @_;
389 return $self->_connect_info if !$info_arg;
391 my @args = @$info_arg; # take a shallow copy for further mutilation
392 $self->_connect_info([@args]); # copy for _connect_info
395 # combine/pre-parse arguments depending on invocation style
398 if (ref $args[0] eq 'CODE') { # coderef with optional \%extra_attributes
399 %attrs = %{ $args[1] || {} };
402 elsif (ref $args[0] eq 'HASH') { # single hashref (i.e. Catalyst config)
403 %attrs = %{$args[0]};
405 for (qw/password user dsn/) {
406 unshift @args, delete $attrs{$_};
409 else { # otherwise assume dsn/user/password + \%attrs + \%extra_attrs
411 % { $args[3] || {} },
412 % { $args[4] || {} },
414 @args = @args[0,1,2];
417 # Kill sql_maker/_sql_maker_opts, so we get a fresh one with only
418 # the new set of options
419 $self->_sql_maker(undef);
420 $self->_sql_maker_opts({});
423 for my $storage_opt (@storage_options, 'cursor_class') { # @storage_options is declared at the top of the module
424 if(my $value = delete $attrs{$storage_opt}) {
425 $self->$storage_opt($value);
428 for my $sql_maker_opt (qw/limit_dialect quote_char name_sep/) {
429 if(my $opt_val = delete $attrs{$sql_maker_opt}) {
430 $self->_sql_maker_opts->{$sql_maker_opt} = $opt_val;
433 for my $connect_do_opt (qw/on_connect_do on_disconnect_do/) {
434 if(my $opt_val = delete $attrs{$connect_do_opt}) {
435 $self->$connect_do_opt($opt_val);
440 %attrs = () if (ref $args[0] eq 'CODE'); # _connect() never looks past $args[0] in this case
442 $self->_dbi_connect_info([@args, keys %attrs ? \%attrs : ()]);
443 $self->_connect_info;
448 This method is deprecated in favour of setting via L</connect_info>.
454 $self->_setup_connect_do(on_connect_do => @_);
457 =head2 on_disconnect_do
459 This method is deprecated in favour of setting via L</connect_info>.
463 sub on_disconnect_do {
465 $self->_setup_connect_do(on_disconnect_do => @_);
468 sub _setup_connect_do {
469 my ($self, $opt) = (shift, shift);
471 my $accessor = "_$opt";
473 return $self->$accessor if not @_;
477 (my $call = $opt) =~ s/_do\z/_call/;
479 if (ref($self->$call) ne 'ARRAY') {
481 defined $self->$call ? $self->$call : ()
486 push @{ $self->$call }, [ 'do_sql', $val ];
487 } elsif (ref($val) eq 'CODE') {
488 push @{ $self->$call }, $val;
489 } elsif (ref($val) eq 'ARRAY') {
490 push @{ $self->$call },
491 map [ 'do_sql', $_ ], @$val;
493 $self->throw_exception("Invalid type for $opt ".ref($val));
496 $self->$accessor($val);
501 Arguments: ($subref | $method_name), @extra_coderef_args?
503 Execute the given $subref or $method_name using the new exception-based
504 connection management.
506 The first two arguments will be the storage object that C<dbh_do> was called
507 on and a database handle to use. Any additional arguments will be passed
508 verbatim to the called subref as arguments 2 and onwards.
510 Using this (instead of $self->_dbh or $self->dbh) ensures correct
511 exception handling and reconnection (or failover in future subclasses).
513 Your subref should have no side-effects outside of the database, as
514 there is the potential for your subref to be partially double-executed
515 if the database connection was stale/dysfunctional.
519 my @stuff = $schema->storage->dbh_do(
521 my ($storage, $dbh, @cols) = @_;
522 my $cols = join(q{, }, @cols);
523 $dbh->selectrow_array("SELECT $cols FROM foo");
534 my $dbh = $self->_dbh;
536 return $self->$code($dbh, @_) if $self->{_in_dbh_do}
537 || $self->{transaction_depth};
539 local $self->{_in_dbh_do} = 1;
542 my $want_array = wantarray;
545 $self->_verify_pid if $dbh;
547 $self->_populate_dbh;
552 @result = $self->$code($dbh, @_);
554 elsif(defined $want_array) {
555 $result[0] = $self->$code($dbh, @_);
558 $self->$code($dbh, @_);
563 if(!$exception) { return $want_array ? @result : $result[0] }
565 $self->throw_exception($exception) if $self->connected;
567 # We were not connected - reconnect and retry, but let any
568 # exception fall right through this time
569 $self->_populate_dbh;
570 $self->$code($self->_dbh, @_);
573 # This is basically a blend of dbh_do above and DBIx::Class::Storage::txn_do.
574 # It also informs dbh_do to bypass itself while under the direction of txn_do,
575 # via $self->{_in_dbh_do} (this saves some redundant eval and errorcheck, etc)
580 ref $coderef eq 'CODE' or $self->throw_exception
581 ('$coderef must be a CODE reference');
583 return $coderef->(@_) if $self->{transaction_depth} && ! $self->auto_savepoint;
585 local $self->{_in_dbh_do} = 1;
588 my $want_array = wantarray;
593 $self->_verify_pid if $self->_dbh;
594 $self->_populate_dbh if !$self->_dbh;
598 @result = $coderef->(@_);
600 elsif(defined $want_array) {
601 $result[0] = $coderef->(@_);
610 if(!$exception) { return $want_array ? @result : $result[0] }
612 if($tried++ > 0 || $self->connected) {
613 eval { $self->txn_rollback };
614 my $rollback_exception = $@;
615 if($rollback_exception) {
616 my $exception_class = "DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION";
617 $self->throw_exception($exception) # propagate nested rollback
618 if $rollback_exception =~ /$exception_class/;
620 $self->throw_exception(
621 "Transaction aborted: ${exception}. "
622 . "Rollback failed: ${rollback_exception}"
625 $self->throw_exception($exception)
628 # We were not connected, and was first try - reconnect and retry
630 $self->_populate_dbh;
636 Our C<disconnect> method also performs a rollback first if the
637 database is not in C<AutoCommit> mode.
644 if( $self->connected ) {
645 my $connection_call = $self->on_disconnect_call;
646 $self->_do_connection_actions(disconnect_call_ => $connection_call)
649 $self->_dbh->rollback unless $self->_dbh_autocommit;
650 $self->_dbh->disconnect;
656 =head2 with_deferred_fk_checks
660 =item Arguments: C<$coderef>
662 =item Return Value: The return value of $coderef
666 Storage specific method to run the code ref with FK checks deferred or
667 in MySQL's case disabled entirely.
671 # Storage subclasses should override this
672 sub with_deferred_fk_checks {
673 my ($self, $sub) = @_;
681 if(my $dbh = $self->_dbh) {
682 if(defined $self->_conn_tid && $self->_conn_tid != threads->tid) {
689 return 0 if !$self->_dbh;
691 return ($dbh->FETCH('Active') && $dbh->ping);
697 # handle pid changes correctly
698 # NOTE: assumes $self->_dbh is a valid $dbh
702 return if defined $self->_conn_pid && $self->_conn_pid == $$;
704 $self->_dbh->{InactiveDestroy} = 1;
711 sub ensure_connected {
714 unless ($self->connected) {
715 $self->_populate_dbh;
721 Returns the dbh - a data base handle of class L<DBI>.
728 $self->ensure_connected;
732 sub _sql_maker_args {
735 return ( bindtype=>'columns', array_datatypes => 1, limit_dialect => $self->dbh, %{$self->_sql_maker_opts} );
740 unless ($self->_sql_maker) {
741 my $sql_maker_class = $self->sql_maker_class;
742 $self->ensure_class_loaded ($sql_maker_class);
743 $self->_sql_maker($sql_maker_class->new( $self->_sql_maker_args ));
745 return $self->_sql_maker;
752 my @info = @{$self->_dbi_connect_info || []};
753 $self->_dbh($self->_connect(@info));
755 $self->_conn_pid($$);
756 $self->_conn_tid(threads->tid) if $INC{'threads.pm'};
758 $self->_determine_driver;
760 # Always set the transaction depth on connect, since
761 # there is no transaction in progress by definition
762 $self->{transaction_depth} = $self->_dbh_autocommit ? 0 : 1;
764 my $connection_call = $self->on_connect_call;
765 $self->_do_connection_actions(connect_call_ => $connection_call)
769 sub _determine_driver {
772 if (ref $self eq 'DBIx::Class::Storage::DBI') {
775 if ($self->_dbh) { # we are connected
776 $driver = $self->_dbh->{Driver}{Name};
778 # try to use dsn to not require being connected, the driver may still
779 # force a connection in _rebless to determine version
780 ($driver) = $self->_dbi_connect_info->[0] =~ /dbi:([^:]+):/i;
783 if ($self->load_optional_class("DBIx::Class::Storage::DBI::${driver}")) {
784 bless $self, "DBIx::Class::Storage::DBI::${driver}";
790 sub _do_connection_actions {
792 my $method_prefix = shift;
795 if (not ref($call)) {
796 my $method = $method_prefix . $call;
798 } elsif (ref($call) eq 'CODE') {
800 } elsif (ref($call) eq 'ARRAY') {
801 if (ref($call->[0]) ne 'ARRAY') {
802 $self->_do_connection_actions($method_prefix, $_) for @$call;
804 $self->_do_connection_actions($method_prefix, @$_) for @$call;
807 $self->throw_exception (sprintf ("Don't know how to process conection actions of type '%s'", ref($call)) );
813 sub connect_call_do_sql {
815 $self->_do_query(@_);
818 sub disconnect_call_do_sql {
820 $self->_do_query(@_);
823 # override in db-specific backend when necessary
824 sub connect_call_set_datetime_format { 1 }
827 my ($self, $action) = @_;
829 if (ref $action eq 'CODE') {
830 $action = $action->($self);
831 $self->_do_query($_) foreach @$action;
834 # Most debuggers expect ($sql, @bind), so we need to exclude
835 # the attribute hash which is the second argument to $dbh->do
836 # furthermore the bind values are usually to be presented
837 # as named arrayref pairs, so wrap those here too
838 my @do_args = (ref $action eq 'ARRAY') ? (@$action) : ($action);
839 my $sql = shift @do_args;
840 my $attrs = shift @do_args;
841 my @bind = map { [ undef, $_ ] } @do_args;
843 $self->_query_start($sql, @bind);
844 $self->_dbh->do($sql, $attrs, @do_args);
845 $self->_query_end($sql, @bind);
852 my ($self, @info) = @_;
854 $self->throw_exception("You failed to provide any connection info")
857 my ($old_connect_via, $dbh);
859 if ($INC{'Apache/DBI.pm'} && $ENV{MOD_PERL}) {
860 $old_connect_via = $DBI::connect_via;
861 $DBI::connect_via = 'connect';
865 if(ref $info[0] eq 'CODE') {
869 $dbh = DBI->connect(@info);
872 if($dbh && !$self->unsafe) {
873 my $weak_self = $self;
874 Scalar::Util::weaken($weak_self);
875 $dbh->{HandleError} = sub {
877 $weak_self->throw_exception("DBI Exception: $_[0]");
880 croak ("DBI Exception: $_[0]");
883 $dbh->{ShowErrorStatement} = 1;
884 $dbh->{RaiseError} = 1;
885 $dbh->{PrintError} = 0;
889 $DBI::connect_via = $old_connect_via if $old_connect_via;
891 $self->throw_exception("DBI Connection failed: " . ($@||$DBI::errstr))
894 $self->_dbh_autocommit($dbh->{AutoCommit});
900 my ($self, $name) = @_;
902 $name = $self->_svp_generate_name
903 unless defined $name;
905 $self->throw_exception ("You can't use savepoints outside a transaction")
906 if $self->{transaction_depth} == 0;
908 $self->throw_exception ("Your Storage implementation doesn't support savepoints")
909 unless $self->can('_svp_begin');
911 push @{ $self->{savepoints} }, $name;
913 $self->debugobj->svp_begin($name) if $self->debug;
915 return $self->_svp_begin($name);
919 my ($self, $name) = @_;
921 $self->throw_exception ("You can't use savepoints outside a transaction")
922 if $self->{transaction_depth} == 0;
924 $self->throw_exception ("Your Storage implementation doesn't support savepoints")
925 unless $self->can('_svp_release');
928 $self->throw_exception ("Savepoint '$name' does not exist")
929 unless grep { $_ eq $name } @{ $self->{savepoints} };
931 # Dig through the stack until we find the one we are releasing. This keeps
932 # the stack up to date.
935 do { $svp = pop @{ $self->{savepoints} } } while $svp ne $name;
937 $name = pop @{ $self->{savepoints} };
940 $self->debugobj->svp_release($name) if $self->debug;
942 return $self->_svp_release($name);
946 my ($self, $name) = @_;
948 $self->throw_exception ("You can't use savepoints outside a transaction")
949 if $self->{transaction_depth} == 0;
951 $self->throw_exception ("Your Storage implementation doesn't support savepoints")
952 unless $self->can('_svp_rollback');
955 # If they passed us a name, verify that it exists in the stack
956 unless(grep({ $_ eq $name } @{ $self->{savepoints} })) {
957 $self->throw_exception("Savepoint '$name' does not exist!");
960 # Dig through the stack until we find the one we are releasing. This keeps
961 # the stack up to date.
962 while(my $s = pop(@{ $self->{savepoints} })) {
963 last if($s eq $name);
965 # Add the savepoint back to the stack, as a rollback doesn't remove the
966 # named savepoint, only everything after it.
967 push(@{ $self->{savepoints} }, $name);
969 # We'll assume they want to rollback to the last savepoint
970 $name = $self->{savepoints}->[-1];
973 $self->debugobj->svp_rollback($name) if $self->debug;
975 return $self->_svp_rollback($name);
978 sub _svp_generate_name {
981 return 'savepoint_'.scalar(@{ $self->{'savepoints'} });
986 $self->ensure_connected();
987 if($self->{transaction_depth} == 0) {
988 $self->debugobj->txn_begin()
990 # this isn't ->_dbh-> because
991 # we should reconnect on begin_work
992 # for AutoCommit users
993 $self->dbh->begin_work;
994 } elsif ($self->auto_savepoint) {
997 $self->{transaction_depth}++;
1002 if ($self->{transaction_depth} == 1) {
1003 my $dbh = $self->_dbh;
1004 $self->debugobj->txn_commit()
1007 $self->{transaction_depth} = 0
1008 if $self->_dbh_autocommit;
1010 elsif($self->{transaction_depth} > 1) {
1011 $self->{transaction_depth}--;
1013 if $self->auto_savepoint;
1019 my $dbh = $self->_dbh;
1021 if ($self->{transaction_depth} == 1) {
1022 $self->debugobj->txn_rollback()
1024 $self->{transaction_depth} = 0
1025 if $self->_dbh_autocommit;
1028 elsif($self->{transaction_depth} > 1) {
1029 $self->{transaction_depth}--;
1030 if ($self->auto_savepoint) {
1031 $self->svp_rollback;
1036 die DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION->new;
1041 my $exception_class = "DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION";
1042 $error =~ /$exception_class/ and $self->throw_exception($error);
1043 # ensure that a failed rollback resets the transaction depth
1044 $self->{transaction_depth} = $self->_dbh_autocommit ? 0 : 1;
1045 $self->throw_exception($error);
1049 # This used to be the top-half of _execute. It was split out to make it
1050 # easier to override in NoBindVars without duping the rest. It takes up
1051 # all of _execute's args, and emits $sql, @bind.
1052 sub _prep_for_execute {
1053 my ($self, $op, $extra_bind, $ident, $args) = @_;
1055 if( Scalar::Util::blessed($ident) && $ident->isa("DBIx::Class::ResultSource") ) {
1056 $ident = $ident->from();
1059 my ($sql, @bind) = $self->sql_maker->$op($ident, @$args);
1062 map { ref $_ eq 'ARRAY' ? $_ : [ '!!dummy', $_ ] } @$extra_bind)
1064 return ($sql, \@bind);
1068 sub _fix_bind_params {
1069 my ($self, @bind) = @_;
1071 ### Turn @bind from something like this:
1072 ### ( [ "artist", 1 ], [ "cdid", 1, 3 ] )
1074 ### ( "'1'", "'1'", "'3'" )
1077 if ( defined( $_ && $_->[1] ) ) {
1078 map { qq{'$_'}; } @{$_}[ 1 .. $#$_ ];
1085 my ( $self, $sql, @bind ) = @_;
1087 if ( $self->debug ) {
1088 @bind = $self->_fix_bind_params(@bind);
1090 $self->debugobj->query_start( $sql, @bind );
1095 my ( $self, $sql, @bind ) = @_;
1097 if ( $self->debug ) {
1098 @bind = $self->_fix_bind_params(@bind);
1099 $self->debugobj->query_end( $sql, @bind );
1104 my ($self, $dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_;
1106 my ($sql, $bind) = $self->_prep_for_execute($op, $extra_bind, $ident, \@args);
1108 $self->_query_start( $sql, @$bind );
1110 my $sth = $self->sth($sql,$op);
1112 my $placeholder_index = 1;
1114 foreach my $bound (@$bind) {
1115 my $attributes = {};
1116 my($column_name, @data) = @$bound;
1118 if ($bind_attributes) {
1119 $attributes = $bind_attributes->{$column_name}
1120 if defined $bind_attributes->{$column_name};
1123 foreach my $data (@data) {
1124 my $ref = ref $data;
1125 $data = $ref && $ref ne 'ARRAY' ? ''.$data : $data; # stringify args (except arrayrefs)
1127 $sth->bind_param($placeholder_index, $data, $attributes);
1128 $placeholder_index++;
1132 # Can this fail without throwing an exception anyways???
1133 my $rv = $sth->execute();
1134 $self->throw_exception($sth->errstr) if !$rv;
1136 $self->_query_end( $sql, @$bind );
1138 return (wantarray ? ($rv, $sth, @$bind) : $rv);
1143 $self->dbh_do('_dbh_execute', @_)
1147 my ($self, $source, $to_insert) = @_;
1149 my $ident = $source->from;
1150 my $bind_attributes = $self->source_bind_attributes($source);
1152 my $updated_cols = {};
1154 $self->ensure_connected;
1155 foreach my $col ( $source->columns ) {
1156 if ( !defined $to_insert->{$col} ) {
1157 my $col_info = $source->column_info($col);
1159 if ( $col_info->{auto_nextval} ) {
1160 $updated_cols->{$col} = $to_insert->{$col} = $self->_sequence_fetch( 'nextval', $col_info->{sequence} || $self->_dbh_get_autoinc_seq($self->dbh, $source) );
1165 $self->_execute('insert' => [], $source, $bind_attributes, $to_insert);
1167 return $updated_cols;
1170 ## Still not quite perfect, and EXPERIMENTAL
1171 ## Currently it is assumed that all values passed will be "normal", i.e. not
1172 ## scalar refs, or at least, all the same type as the first set, the statement is
1173 ## only prepped once.
1175 my ($self, $source, $cols, $data) = @_;
1177 my $table = $source->from;
1178 @colvalues{@$cols} = (0..$#$cols);
1179 my ($sql, @bind) = $self->sql_maker->insert($table, \%colvalues);
1181 $self->_query_start( $sql, @bind );
1182 my $sth = $self->sth($sql);
1184 # @bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args
1186 ## This must be an arrayref, else nothing works!
1187 my $tuple_status = [];
1189 ## Get the bind_attributes, if any exist
1190 my $bind_attributes = $self->source_bind_attributes($source);
1192 ## Bind the values and execute
1193 my $placeholder_index = 1;
1195 foreach my $bound (@bind) {
1197 my $attributes = {};
1198 my ($column_name, $data_index) = @$bound;
1200 if( $bind_attributes ) {
1201 $attributes = $bind_attributes->{$column_name}
1202 if defined $bind_attributes->{$column_name};
1205 my @data = map { $_->[$data_index] } @$data;
1207 $sth->bind_param_array( $placeholder_index, [@data], $attributes );
1208 $placeholder_index++;
1210 my $rv = eval { $sth->execute_array({ArrayTupleStatus => $tuple_status}) };
1213 ++$i while $i <= $#$tuple_status && !ref $tuple_status->[$i];
1215 $self->throw_exception($sth->errstr || "Unexpected populate error: $err")
1216 if ($i > $#$tuple_status);
1218 require Data::Dumper;
1219 local $Data::Dumper::Terse = 1;
1220 local $Data::Dumper::Indent = 1;
1221 local $Data::Dumper::Useqq = 1;
1222 local $Data::Dumper::Quotekeys = 0;
1224 $self->throw_exception(sprintf "%s for populate slice:\n%s",
1225 $tuple_status->[$i][1],
1226 Data::Dumper::Dumper(
1227 { map { $cols->[$_] => $data->[$i][$_] } (0 .. $#$cols) }
1231 $self->throw_exception($sth->errstr) if !$rv;
1233 $self->_query_end( $sql, @bind );
1234 return (wantarray ? ($rv, $sth, @bind) : $rv);
1238 my $self = shift @_;
1239 my $source = shift @_;
1240 my $bind_attributes = $self->source_bind_attributes($source);
1242 return $self->_execute('update' => [], $source, $bind_attributes, @_);
1247 my $self = shift @_;
1248 my $source = shift @_;
1250 my $bind_attrs = $self->source_bind_attributes($source);
1252 return $self->_execute('delete' => [], $source, $bind_attrs, @_);
1255 # We were sent here because the $rs contains a complex search
1256 # which will require a subquery to select the correct rows
1257 # (i.e. joined or limited resultsets)
1259 # Genarating a single PK column subquery is trivial and supported
1260 # by all RDBMS. However if we have a multicolumn PK, things get ugly.
1261 # Look at _multipk_update_delete()
1262 sub _subq_update_delete {
1264 my ($rs, $op, $values) = @_;
1266 my $rsrc = $rs->result_source;
1268 # we already check this, but double check naively just in case. Should be removed soon
1269 my $sel = $rs->_resolved_attrs->{select};
1270 $sel = [ $sel ] unless ref $sel eq 'ARRAY';
1271 my @pcols = $rsrc->primary_columns;
1272 if (@$sel != @pcols) {
1273 $self->throw_exception (
1274 'Subquery update/delete can not be called on resultsets selecting a'
1275 .' number of columns different than the number of primary keys'
1282 $op eq 'update' ? $values : (),
1283 { $pcols[0] => { -in => $rs->as_query } },
1288 return $self->_multipk_update_delete (@_);
1292 # ANSI SQL does not provide a reliable way to perform a multicol-PK
1293 # resultset update/delete involving subqueries. So by default resort
1294 # to simple (and inefficient) delete_all style per-row opearations,
1295 # while allowing specific storages to override this with a faster
1298 sub _multipk_update_delete {
1299 return shift->_per_row_update_delete (@_);
1302 # This is the default loop used to delete/update rows for multi PK
1303 # resultsets, and used by mysql exclusively (because it can't do anything
1306 # We do not use $row->$op style queries, because resultset update/delete
1307 # is not expected to cascade (this is what delete_all/update_all is for).
1309 # There should be no race conditions as the entire operation is rolled
1312 sub _per_row_update_delete {
1314 my ($rs, $op, $values) = @_;
1316 my $rsrc = $rs->result_source;
1317 my @pcols = $rsrc->primary_columns;
1319 my $guard = $self->txn_scope_guard;
1321 # emulate the return value of $sth->execute for non-selects
1322 my $row_cnt = '0E0';
1324 my $subrs_cur = $rs->cursor;
1325 while (my @pks = $subrs_cur->next) {
1328 for my $i (0.. $#pcols) {
1329 $cond->{$pcols[$i]} = $pks[$i];
1334 $op eq 'update' ? $values : (),
1348 my $sql_maker = $self->sql_maker;
1349 local $sql_maker->{for};
1350 return $self->_execute($self->_select_args(@_));
1353 sub _select_args_to_query {
1356 my $sql_maker = $self->sql_maker;
1357 local $sql_maker->{for};
1359 # my ($op, $bind, $ident, $bind_attrs, $select, $cond, $order, $rows, $offset)
1360 # = $self->_select_args($ident, $select, $cond, $attrs);
1361 my ($op, $bind, $ident, $bind_attrs, @args) =
1362 $self->_select_args(@_);
1364 # my ($sql, $bind) = $self->_prep_for_execute($op, $bind, $ident, [ $select, $cond, $order, $rows, $offset ]);
1365 my ($sql, $prepared_bind) = $self->_prep_for_execute($op, $bind, $ident, \@args);
1367 return \[ "($sql)", @{ $prepared_bind || [] }];
1371 my ($self, $ident, $select, $condition, $attrs) = @_;
1373 my $for = delete $attrs->{for};
1374 my $sql_maker = $self->sql_maker;
1375 $sql_maker->{for} = $for;
1378 { $attrs->{$_} ? ( $_ => $attrs->{$_} ) : () }
1379 (qw/order_by group_by having _virtual_order_by/ )
1383 my $bind_attrs = {};
1385 my $alias2source = $self->_resolve_ident_sources ($ident);
1387 for my $alias (keys %$alias2source) {
1388 my $bindtypes = $self->source_bind_attributes ($alias2source->{$alias}) || {};
1389 for my $col (keys %$bindtypes) {
1391 my $fqcn = join ('.', $alias, $col);
1392 $bind_attrs->{$fqcn} = $bindtypes->{$col} if $bindtypes->{$col};
1394 # so that unqualified searches can be bound too
1395 $bind_attrs->{$col} = $bind_attrs->{$fqcn} if $alias eq 'me';
1399 # This would be the point to deflate anything found in $condition
1400 # (and leave $attrs->{bind} intact). Problem is - inflators historically
1401 # expect a row object. And all we have is a resultsource (it is trivial
1402 # to extract deflator coderefs via $alias2source above).
1404 # I don't see a way forward other than changing the way deflators are
1405 # invoked, and that's just bad...
1407 my @args = ('select', $attrs->{bind}, $ident, $bind_attrs, $select, $condition, $order);
1408 if ($attrs->{software_limit} ||
1409 $sql_maker->_default_limit_syntax eq "GenericSubQ") {
1410 $attrs->{software_limit} = 1;
1412 $self->throw_exception("rows attribute must be positive if present")
1413 if (defined($attrs->{rows}) && !($attrs->{rows} > 0));
1415 # MySQL actually recommends this approach. I cringe.
1416 $attrs->{rows} = 2**48 if not defined $attrs->{rows} and defined $attrs->{offset};
1417 push @args, $attrs->{rows}, $attrs->{offset};
1422 sub _resolve_ident_sources {
1423 my ($self, $ident) = @_;
1425 my $alias2source = {};
1427 # the reason this is so contrived is that $ident may be a {from}
1428 # structure, specifying multiple tables to join
1429 if ( Scalar::Util::blessed($ident) && $ident->isa("DBIx::Class::ResultSource") ) {
1430 # this is compat mode for insert/update/delete which do not deal with aliases
1431 $alias2source->{me} = $ident;
1433 elsif (ref $ident eq 'ARRAY') {
1437 if (ref $_ eq 'HASH') {
1440 if (ref $_ eq 'ARRAY' and ref $_->[0] eq 'HASH') {
1444 $alias2source->{$tabinfo->{-alias}} = $tabinfo->{-result_source}
1445 if ($tabinfo->{-result_source});
1449 return $alias2source;
1453 my ($self, $source, $attrs) = @_;
1455 my $tmp_attrs = { %$attrs };
1457 # take off any pagers, record_filter is cdbi, and no point of ordering a count
1458 delete $tmp_attrs->{$_} for (qw/select as rows offset page order_by record_filter/);
1460 # overwrite the selector
1461 $tmp_attrs->{select} = { count => '*' };
1463 my $tmp_rs = $source->resultset_class->new($source, $tmp_attrs);
1464 my ($count) = $tmp_rs->cursor->next;
1466 # if the offset/rows attributes are still present, we did not use
1467 # a subquery, so we need to make the calculations in software
1468 $count -= $attrs->{offset} if $attrs->{offset};
1469 $count = $attrs->{rows} if $attrs->{rows} and $attrs->{rows} < $count;
1470 $count = 0 if ($count < 0);
1476 my ($self, $source, $attrs) = @_;
1478 # copy for the subquery, we need to do some adjustments to it too
1479 my $sub_attrs = { %$attrs };
1481 # these can not go in the subquery, and there is no point of ordering it
1482 delete $sub_attrs->{$_} for qw/prefetch collapse select as order_by/;
1484 # if we prefetch, we group_by primary keys only as this is what we would get out of the rs via ->next/->all
1485 # simply deleting group_by suffices, as the code below will re-fill it
1486 # Note: we check $attrs, as $sub_attrs has collapse deleted
1487 if (ref $attrs->{collapse} and keys %{$attrs->{collapse}} ) {
1488 delete $sub_attrs->{group_by};
1491 $sub_attrs->{group_by} ||= [ map { "$attrs->{alias}.$_" } ($source->primary_columns) ];
1492 $sub_attrs->{select} = $self->_grouped_count_select ($source, $sub_attrs);
1495 count_subq => $source->resultset_class->new ($source, $sub_attrs )->as_query
1498 # the subquery replaces this
1499 delete $attrs->{$_} for qw/where bind prefetch collapse group_by having having_bind rows offset page pager/;
1501 return $self->count ($source, $attrs);
1505 # Returns a SELECT to go with a supplied GROUP BY
1506 # (caled by count_grouped so a group_by is present)
1507 # Most databases expect them to match, but some
1508 # choke in various ways.
1510 sub _grouped_count_select {
1511 my ($self, $source, $rs_args) = @_;
1512 return $rs_args->{group_by};
1515 sub source_bind_attributes {
1516 my ($self, $source) = @_;
1518 my $bind_attributes;
1519 foreach my $column ($source->columns) {
1521 my $data_type = $source->column_info($column)->{data_type} || '';
1522 $bind_attributes->{$column} = $self->bind_attribute_by_data_type($data_type)
1526 return $bind_attributes;
1533 =item Arguments: $ident, $select, $condition, $attrs
1537 Handle a SQL select statement.
1543 my ($ident, $select, $condition, $attrs) = @_;
1544 return $self->cursor_class->new($self, \@_, $attrs);
1549 my ($rv, $sth, @bind) = $self->_select(@_);
1550 my @row = $sth->fetchrow_array;
1551 my @nextrow = $sth->fetchrow_array if @row;
1552 if(@row && @nextrow) {
1553 carp "Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single";
1555 # Need to call finish() to work round broken DBDs
1564 =item Arguments: $sql
1568 Returns a L<DBI> sth (statement handle) for the supplied SQL.
1573 my ($self, $dbh, $sql) = @_;
1575 # 3 is the if_active parameter which avoids active sth re-use
1576 my $sth = $self->disable_sth_caching
1577 ? $dbh->prepare($sql)
1578 : $dbh->prepare_cached($sql, {}, 3);
1580 # XXX You would think RaiseError would make this impossible,
1581 # but apparently that's not true :(
1582 $self->throw_exception($dbh->errstr) if !$sth;
1588 my ($self, $sql) = @_;
1589 $self->dbh_do('_dbh_sth', $sql);
1592 sub _dbh_columns_info_for {
1593 my ($self, $dbh, $table) = @_;
1595 if ($dbh->can('column_info')) {
1598 my ($schema,$tab) = $table =~ /^(.+?)\.(.+)$/ ? ($1,$2) : (undef,$table);
1599 my $sth = $dbh->column_info( undef,$schema, $tab, '%' );
1601 while ( my $info = $sth->fetchrow_hashref() ){
1603 $column_info{data_type} = $info->{TYPE_NAME};
1604 $column_info{size} = $info->{COLUMN_SIZE};
1605 $column_info{is_nullable} = $info->{NULLABLE} ? 1 : 0;
1606 $column_info{default_value} = $info->{COLUMN_DEF};
1607 my $col_name = $info->{COLUMN_NAME};
1608 $col_name =~ s/^\"(.*)\"$/$1/;
1610 $result{$col_name} = \%column_info;
1613 return \%result if !$@ && scalar keys %result;
1617 my $sth = $dbh->prepare($self->sql_maker->select($table, undef, \'1 = 0'));
1619 my @columns = @{$sth->{NAME_lc}};
1620 for my $i ( 0 .. $#columns ){
1622 $column_info{data_type} = $sth->{TYPE}->[$i];
1623 $column_info{size} = $sth->{PRECISION}->[$i];
1624 $column_info{is_nullable} = $sth->{NULLABLE}->[$i] ? 1 : 0;
1626 if ($column_info{data_type} =~ m/^(.*?)\((.*?)\)$/) {
1627 $column_info{data_type} = $1;
1628 $column_info{size} = $2;
1631 $result{$columns[$i]} = \%column_info;
1635 foreach my $col (keys %result) {
1636 my $colinfo = $result{$col};
1637 my $type_num = $colinfo->{data_type};
1639 if(defined $type_num && $dbh->can('type_info')) {
1640 my $type_info = $dbh->type_info($type_num);
1641 $type_name = $type_info->{TYPE_NAME} if $type_info;
1642 $colinfo->{data_type} = $type_name if $type_name;
1649 sub columns_info_for {
1650 my ($self, $table) = @_;
1651 $self->dbh_do('_dbh_columns_info_for', $table);
1654 =head2 last_insert_id
1656 Return the row id of the last insert.
1660 sub _dbh_last_insert_id {
1661 # All Storage's need to register their own _dbh_last_insert_id
1662 # the old SQLite-based method was highly inappropriate
1665 my $class = ref $self;
1666 $self->throw_exception (<<EOE);
1668 No _dbh_last_insert_id() method found in $class.
1669 Since the method of obtaining the autoincrement id of the last insert
1670 operation varies greatly between different databases, this method must be
1671 individually implemented for every storage class.
1675 sub last_insert_id {
1677 $self->dbh_do('_dbh_last_insert_id', @_);
1682 Returns the database driver name.
1686 sub sqlt_type { shift->dbh->{Driver}->{Name} }
1688 =head2 bind_attribute_by_data_type
1690 Given a datatype from column info, returns a database specific bind
1691 attribute for C<< $dbh->bind_param($val,$attribute) >> or nothing if we will
1692 let the database planner just handle it.
1694 Generally only needed for special case column types, like bytea in postgres.
1698 sub bind_attribute_by_data_type {
1702 =head2 is_datatype_numeric
1704 Given a datatype from column_info, returns a boolean value indicating if
1705 the current RDBMS considers it a numeric value. This controls how
1706 L<DBIx::Class::Row/set_column> decides whether to mark the column as
1707 dirty - when the datatype is deemed numeric a C<< != >> comparison will
1708 be performed instead of the usual C<eq>.
1712 sub is_datatype_numeric {
1713 my ($self, $dt) = @_;
1715 return 0 unless $dt;
1717 return $dt =~ /^ (?:
1718 numeric | int(?:eger)? | (?:tiny|small|medium|big)int | dec(?:imal)? | real | float | double (?: \s+ precision)? | (?:big)?serial
1723 =head2 create_ddl_dir (EXPERIMENTAL)
1727 =item Arguments: $schema \@databases, $version, $directory, $preversion, \%sqlt_args
1731 Creates a SQL file based on the Schema, for each of the specified
1732 database engines in C<\@databases> in the given directory.
1733 (note: specify L<SQL::Translator> names, not L<DBI> driver names).
1735 Given a previous version number, this will also create a file containing
1736 the ALTER TABLE statements to transform the previous schema into the
1737 current one. Note that these statements may contain C<DROP TABLE> or
1738 C<DROP COLUMN> statements that can potentially destroy data.
1740 The file names are created using the C<ddl_filename> method below, please
1741 override this method in your schema if you would like a different file
1742 name format. For the ALTER file, the same format is used, replacing
1743 $version in the name with "$preversion-$version".
1745 See L<SQL::Translator/METHODS> for a list of values for C<\%sqlt_args>.
1746 The most common value for this would be C<< { add_drop_table => 1 } >>
1747 to have the SQL produced include a C<DROP TABLE> statement for each table
1748 created. For quoting purposes supply C<quote_table_names> and
1749 C<quote_field_names>.
1751 If no arguments are passed, then the following default values are assumed:
1755 =item databases - ['MySQL', 'SQLite', 'PostgreSQL']
1757 =item version - $schema->schema_version
1759 =item directory - './'
1761 =item preversion - <none>
1765 By default, C<\%sqlt_args> will have
1767 { add_drop_table => 1, ignore_constraint_names => 1, ignore_index_names => 1 }
1769 merged with the hash passed in. To disable any of those features, pass in a
1770 hashref like the following
1772 { ignore_constraint_names => 0, # ... other options }
1775 Note that this feature is currently EXPERIMENTAL and may not work correctly
1776 across all databases, or fully handle complex relationships.
1778 WARNING: Please check all SQL files created, before applying them.
1782 sub create_ddl_dir {
1783 my ($self, $schema, $databases, $version, $dir, $preversion, $sqltargs) = @_;
1785 if(!$dir || !-d $dir) {
1786 carp "No directory given, using ./\n";
1789 $databases ||= ['MySQL', 'SQLite', 'PostgreSQL'];
1790 $databases = [ $databases ] if(ref($databases) ne 'ARRAY');
1792 my $schema_version = $schema->schema_version || '1.x';
1793 $version ||= $schema_version;
1796 add_drop_table => 1,
1797 ignore_constraint_names => 1,
1798 ignore_index_names => 1,
1802 $self->throw_exception(q{Can't create a ddl file without SQL::Translator 0.09003: '}
1803 . $self->_check_sqlt_message . q{'})
1804 if !$self->_check_sqlt_version;
1806 my $sqlt = SQL::Translator->new( $sqltargs );
1808 $sqlt->parser('SQL::Translator::Parser::DBIx::Class');
1809 my $sqlt_schema = $sqlt->translate({ data => $schema })
1810 or $self->throw_exception ($sqlt->error);
1812 foreach my $db (@$databases) {
1814 $sqlt->{schema} = $sqlt_schema;
1815 $sqlt->producer($db);
1818 my $filename = $schema->ddl_filename($db, $version, $dir);
1819 if (-e $filename && ($version eq $schema_version )) {
1820 # if we are dumping the current version, overwrite the DDL
1821 carp "Overwriting existing DDL file - $filename";
1825 my $output = $sqlt->translate;
1827 carp("Failed to translate to $db, skipping. (" . $sqlt->error . ")");
1830 if(!open($file, ">$filename")) {
1831 $self->throw_exception("Can't open $filename for writing ($!)");
1834 print $file $output;
1837 next unless ($preversion);
1839 require SQL::Translator::Diff;
1841 my $prefilename = $schema->ddl_filename($db, $preversion, $dir);
1842 if(!-e $prefilename) {
1843 carp("No previous schema file found ($prefilename)");
1847 my $difffile = $schema->ddl_filename($db, $version, $dir, $preversion);
1849 carp("Overwriting existing diff file - $difffile");
1855 my $t = SQL::Translator->new($sqltargs);
1860 or $self->throw_exception ($t->error);
1862 my $out = $t->translate( $prefilename )
1863 or $self->throw_exception ($t->error);
1865 $source_schema = $t->schema;
1867 $source_schema->name( $prefilename )
1868 unless ( $source_schema->name );
1871 # The "new" style of producers have sane normalization and can support
1872 # diffing a SQL file against a DBIC->SQLT schema. Old style ones don't
1873 # And we have to diff parsed SQL against parsed SQL.
1874 my $dest_schema = $sqlt_schema;
1876 unless ( "SQL::Translator::Producer::$db"->can('preprocess_schema') ) {
1877 my $t = SQL::Translator->new($sqltargs);
1882 or $self->throw_exception ($t->error);
1884 my $out = $t->translate( $filename )
1885 or $self->throw_exception ($t->error);
1887 $dest_schema = $t->schema;
1889 $dest_schema->name( $filename )
1890 unless $dest_schema->name;
1893 my $diff = SQL::Translator::Diff::schema_diff($source_schema, $db,
1897 if(!open $file, ">$difffile") {
1898 $self->throw_exception("Can't write to $difffile ($!)");
1906 =head2 deployment_statements
1910 =item Arguments: $schema, $type, $version, $directory, $sqlt_args
1914 Returns the statements used by L</deploy> and L<DBIx::Class::Schema/deploy>.
1916 The L<SQL::Translator> (not L<DBI>) database driver name can be explicitly
1917 provided in C<$type>, otherwise the result of L</sqlt_type> is used as default.
1919 C<$directory> is used to return statements from files in a previously created
1920 L</create_ddl_dir> directory and is optional. The filenames are constructed
1921 from L<DBIx::Class::Schema/ddl_filename>, the schema name and the C<$version>.
1923 If no C<$directory> is specified then the statements are constructed on the
1924 fly using L<SQL::Translator> and C<$version> is ignored.
1926 See L<SQL::Translator/METHODS> for a list of values for C<$sqlt_args>.
1930 sub deployment_statements {
1931 my ($self, $schema, $type, $version, $dir, $sqltargs) = @_;
1932 # Need to be connected to get the correct sqlt_type
1933 $self->ensure_connected() unless $type;
1934 $type ||= $self->sqlt_type;
1935 $version ||= $schema->schema_version || '1.x';
1937 my $filename = $schema->ddl_filename($type, $version, $dir);
1941 open($file, "<$filename")
1942 or $self->throw_exception("Can't open $filename ($!)");
1945 return join('', @rows);
1948 $self->throw_exception(q{Can't deploy without SQL::Translator 0.09003: '}
1949 . $self->_check_sqlt_message . q{'})
1950 if !$self->_check_sqlt_version;
1952 require SQL::Translator::Parser::DBIx::Class;
1953 eval qq{use SQL::Translator::Producer::${type}};
1954 $self->throw_exception($@) if $@;
1956 # sources needs to be a parser arg, but for simplicty allow at top level
1958 $sqltargs->{parser_args}{sources} = delete $sqltargs->{sources}
1959 if exists $sqltargs->{sources};
1961 my $tr = SQL::Translator->new(%$sqltargs);
1962 SQL::Translator::Parser::DBIx::Class::parse( $tr, $schema );
1963 return "SQL::Translator::Producer::${type}"->can('produce')->($tr);
1967 my ($self, $schema, $type, $sqltargs, $dir) = @_;
1970 return if($line =~ /^--/);
1972 # next if($line =~ /^DROP/m);
1973 return if($line =~ /^BEGIN TRANSACTION/m);
1974 return if($line =~ /^COMMIT/m);
1975 return if $line =~ /^\s+$/; # skip whitespace only
1976 $self->_query_start($line);
1978 $self->dbh->do($line); # shouldn't be using ->dbh ?
1981 carp qq{$@ (running "${line}")};
1983 $self->_query_end($line);
1985 my @statements = $self->deployment_statements($schema, $type, undef, $dir, { %{ $sqltargs || {} }, no_comments => 1 } );
1986 if (@statements > 1) {
1987 foreach my $statement (@statements) {
1988 $deploy->( $statement );
1991 elsif (@statements == 1) {
1992 foreach my $line ( split(";\n", $statements[0])) {
1998 =head2 datetime_parser
2000 Returns the datetime parser class
2004 sub datetime_parser {
2006 return $self->{datetime_parser} ||= do {
2007 $self->ensure_connected;
2008 $self->build_datetime_parser(@_);
2012 =head2 datetime_parser_type
2014 Defines (returns) the datetime parser class - currently hardwired to
2015 L<DateTime::Format::MySQL>
2019 sub datetime_parser_type { "DateTime::Format::MySQL"; }
2021 =head2 build_datetime_parser
2023 See L</datetime_parser>
2027 sub build_datetime_parser {
2029 my $type = $self->datetime_parser_type(@_);
2031 $self->throw_exception("Couldn't load ${type}: $@") if $@;
2036 my $_check_sqlt_version; # private
2037 my $_check_sqlt_message; # private
2038 sub _check_sqlt_version {
2039 return $_check_sqlt_version if defined $_check_sqlt_version;
2040 eval 'use SQL::Translator "0.09003"';
2041 $_check_sqlt_message = $@ || '';
2042 $_check_sqlt_version = !$@;
2045 sub _check_sqlt_message {
2046 _check_sqlt_version if !defined $_check_sqlt_message;
2047 $_check_sqlt_message;
2051 =head2 is_replicating
2053 A boolean that reports if a particular L<DBIx::Class::Storage::DBI> is set to
2054 replicate from a master database. Default is undef, which is the result
2055 returned by databases that don't support replication.
2059 sub is_replicating {
2064 =head2 lag_behind_master
2066 Returns a number that represents a certain amount of lag behind a master db
2067 when a given storage is replicating. The number is database dependent, but
2068 starts at zero and increases with the amount of lag. Default in undef
2072 sub lag_behind_master {
2078 return if !$self->_dbh;
2087 =head2 DBIx::Class and AutoCommit
2089 DBIx::Class can do some wonderful magic with handling exceptions,
2090 disconnections, and transactions when you use C<< AutoCommit => 1 >>
2091 combined with C<txn_do> for transaction support.
2093 If you set C<< AutoCommit => 0 >> in your connect info, then you are always
2094 in an assumed transaction between commits, and you're telling us you'd
2095 like to manage that manually. A lot of the magic protections offered by
2096 this module will go away. We can't protect you from exceptions due to database
2097 disconnects because we don't know anything about how to restart your
2098 transactions. You're on your own for handling all sorts of exceptional
2099 cases if you choose the C<< AutoCommit => 0 >> path, just as you would
2106 Matt S. Trout <mst@shadowcatsystems.co.uk>
2108 Andy Grundman <andy@hybridized.org>
2112 You may distribute this code under the same terms as Perl itself.