1 package DBIx::Class::Storage::DBI;
2 # -*- mode: cperl; cperl-indent-level: 2 -*-
7 use base qw/DBIx::Class::Storage::DBIHacks DBIx::Class::Storage/;
10 use DBIx::Class::Carp;
11 use DBIx::Class::Exception;
12 use Scalar::Util qw/refaddr weaken reftype blessed/;
13 use List::Util qw/first/;
14 use Sub::Name 'subname';
17 use Data::Compare (); # no imports!!! guard against insane architecture
20 # default cursor class, overridable in connect_info attributes
21 __PACKAGE__->cursor_class('DBIx::Class::Storage::DBI::Cursor');
23 __PACKAGE__->mk_group_accessors('inherited' => qw/
24 sql_limit_dialect sql_quote_char sql_name_sep
27 __PACKAGE__->mk_group_accessors('component_class' => qw/sql_maker_class datetime_parser_type/);
29 __PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker');
30 __PACKAGE__->datetime_parser_type('DateTime::Format::MySQL'); # historic default
32 __PACKAGE__->sql_name_sep('.');
34 __PACKAGE__->mk_group_accessors('simple' => qw/
35 _connect_info _dbi_connect_info _dbic_connect_attributes _driver_determined
36 _dbh _dbh_details _conn_pid _sql_maker _sql_maker_opts _dbh_autocommit
39 # the values for these accessors are picked out (and deleted) from
40 # the attribute hashref passed to connect_info
41 my @storage_options = qw/
42 on_connect_call on_disconnect_call on_connect_do on_disconnect_do
43 disable_sth_caching unsafe auto_savepoint
45 __PACKAGE__->mk_group_accessors('simple' => @storage_options);
48 # capability definitions, using a 2-tiered accessor system
51 # A driver/user may define _use_X, which blindly without any checks says:
52 # "(do not) use this capability", (use_dbms_capability is an "inherited"
55 # If _use_X is undef, _supports_X is then queried. This is a "simple" style
56 # accessor, which in turn calls _determine_supports_X, and stores the return
57 # in a special slot on the storage object, which is wiped every time a $dbh
58 # reconnection takes place (it is not guaranteed that upon reconnection we
59 # will get the same rdbms version). _determine_supports_X does not need to
60 # exist on a driver, as we ->can for it before calling.
62 my @capabilities = (qw/
64 insert_returning_bound
73 __PACKAGE__->mk_group_accessors( dbms_capability => map { "_supports_$_" } @capabilities );
74 __PACKAGE__->mk_group_accessors( use_dbms_capability => map { "_use_$_" } (@capabilities ) );
76 # on by default, not strictly a capability (pending rewrite)
77 __PACKAGE__->_use_join_optimizer (1);
78 sub _determine_supports_join_optimizer { 1 };
80 # Each of these methods need _determine_driver called before itself
81 # in order to function reliably. This is a purely DRY optimization
83 # get_(use)_dbms_capability need to be called on the correct Storage
84 # class, as _use_X may be hardcoded class-wide, and _supports_X calls
85 # _determine_supports_X which obv. needs a correct driver as well
86 my @rdbms_specific_methods = qw/
100 with_deferred_fk_checks
102 get_use_dbms_capability
109 for my $meth (@rdbms_specific_methods) {
111 my $orig = __PACKAGE__->can ($meth)
112 or die "$meth is not a ::Storage::DBI method!";
115 no warnings qw/redefine/;
116 *{__PACKAGE__ ."::$meth"} = subname $meth => sub {
118 # only fire when invoked on an instance, a valid class-based invocation
119 # would e.g. be setting a default for an inherited accessor
122 ! $_[0]->_driver_determined
124 ! $_[0]->{_in_determine_driver}
126 $_[0]->_determine_driver;
128 # This for some reason crashes and burns on perl 5.8.1
129 # IFF the method ends up throwing an exception
130 #goto $_[0]->can ($meth);
132 my $cref = $_[0]->can ($meth);
142 DBIx::Class::Storage::DBI - DBI storage handler
146 my $schema = MySchema->connect('dbi:SQLite:my.db');
148 $schema->storage->debug(1);
150 my @stuff = $schema->storage->dbh_do(
152 my ($storage, $dbh, @args) = @_;
153 $dbh->do("DROP TABLE authors");
158 $schema->resultset('Book')->search({
159 written_on => $schema->storage->datetime_parser->format_datetime(DateTime->now)
164 This class represents the connection to an RDBMS via L<DBI>. See
165 L<DBIx::Class::Storage> for general information. This pod only
166 documents DBI-specific methods and behaviors.
173 my $new = shift->next::method(@_);
175 $new->_sql_maker_opts({});
176 $new->_dbh_details({});
177 $new->{_in_do_block} = 0;
178 $new->{_dbh_gen} = 0;
180 # read below to see what this does
181 $new->_arm_global_destructor;
186 # This is hack to work around perl shooting stuff in random
187 # order on exit(). If we do not walk the remaining storage
188 # objects in an END block, there is a *small but real* chance
189 # of a fork()ed child to kill the parent's shared DBI handle,
190 # *before perl reaches the DESTROY in this package*
191 # Yes, it is ugly and effective.
192 # Additionally this registry is used by the CLONE method to
193 # make sure no handles are shared between threads
195 my %seek_and_destroy;
197 sub _arm_global_destructor {
199 my $key = refaddr ($self);
200 $seek_and_destroy{$key} = $self;
201 weaken ($seek_and_destroy{$key});
205 local $?; # just in case the DBI destructor changes it somehow
207 # destroy just the object if not native to this process/thread
208 $_->_verify_pid for (grep
210 values %seek_and_destroy
215 # As per DBI's recommendation, DBIC disconnects all handles as
216 # soon as possible (DBIC will reconnect only on demand from within
218 for (values %seek_and_destroy) {
220 $_->{_dbh_gen}++; # so that existing cursors will drop as well
223 $_->transaction_depth(0);
232 # some databases spew warnings on implicit disconnect
234 local $SIG{__WARN__} = sub {};
237 # this op is necessary, since the very last perl runtime statement
238 # triggers a global destruction shootout, and the $SIG localization
239 # may very well be destroyed before perl actually gets to do the
244 # handle pid changes correctly - do not destroy parent's connection
248 my $pid = $self->_conn_pid;
249 if( defined $pid and $pid != $$ and my $dbh = $self->_dbh ) {
250 $dbh->{InactiveDestroy} = 1;
253 $self->transaction_depth(0);
254 $self->savepoints([]);
262 This method is normally called by L<DBIx::Class::Schema/connection>, which
263 encapsulates its argument list in an arrayref before passing them here.
265 The argument list may contain:
271 The same 4-element argument set one would normally pass to
272 L<DBI/connect>, optionally followed by
273 L<extra attributes|/DBIx::Class specific connection attributes>
274 recognized by DBIx::Class:
276 $connect_info_args = [ $dsn, $user, $password, \%dbi_attributes?, \%extra_attributes? ];
280 A single code reference which returns a connected
281 L<DBI database handle|DBI/connect> optionally followed by
282 L<extra attributes|/DBIx::Class specific connection attributes> recognized
285 $connect_info_args = [ sub { DBI->connect (...) }, \%extra_attributes? ];
289 A single hashref with all the attributes and the dsn/user/password
292 $connect_info_args = [{
300 $connect_info_args = [{
301 dbh_maker => sub { DBI->connect (...) },
306 This is particularly useful for L<Catalyst> based applications, allowing the
307 following config (L<Config::General> style):
312 dsn dbi:mysql:database=test
319 The C<dsn>/C<user>/C<password> combination can be substituted by the
320 C<dbh_maker> key whose value is a coderef that returns a connected
321 L<DBI database handle|DBI/connect>
325 Please note that the L<DBI> docs recommend that you always explicitly
326 set C<AutoCommit> to either I<0> or I<1>. L<DBIx::Class> further
327 recommends that it be set to I<1>, and that you perform transactions
328 via our L<DBIx::Class::Schema/txn_do> method. L<DBIx::Class> will set it
329 to I<1> if you do not do explicitly set it to zero. This is the default
330 for most DBDs. See L</DBIx::Class and AutoCommit> for details.
332 =head3 DBIx::Class specific connection attributes
334 In addition to the standard L<DBI|DBI/ATTRIBUTES COMMON TO ALL HANDLES>
335 L<connection|DBI/Database Handle Attributes> attributes, DBIx::Class recognizes
336 the following connection options. These options can be mixed in with your other
337 L<DBI> connection attributes, or placed in a separate hashref
338 (C<\%extra_attributes>) as shown above.
340 Every time C<connect_info> is invoked, any previous settings for
341 these options will be cleared before setting the new ones, regardless of
342 whether any options are specified in the new C<connect_info>.
349 Specifies things to do immediately after connecting or re-connecting to
350 the database. Its value may contain:
356 This contains one SQL statement to execute.
358 =item an array reference
360 This contains SQL statements to execute in order. Each element contains
361 a string or a code reference that returns a string.
363 =item a code reference
365 This contains some code to execute. Unlike code references within an
366 array reference, its return value is ignored.
370 =item on_disconnect_do
372 Takes arguments in the same form as L</on_connect_do> and executes them
373 immediately before disconnecting from the database.
375 Note, this only runs if you explicitly call L</disconnect> on the
378 =item on_connect_call
380 A more generalized form of L</on_connect_do> that calls the specified
381 C<connect_call_METHOD> methods in your storage driver.
383 on_connect_do => 'select 1'
387 on_connect_call => [ [ do_sql => 'select 1' ] ]
389 Its values may contain:
395 Will call the C<connect_call_METHOD> method.
397 =item a code reference
399 Will execute C<< $code->($storage) >>
401 =item an array reference
403 Each value can be a method name or code reference.
405 =item an array of arrays
407 For each array, the first item is taken to be the C<connect_call_> method name
408 or code reference, and the rest are parameters to it.
412 Some predefined storage methods you may use:
418 Executes a SQL string or a code reference that returns a SQL string. This is
419 what L</on_connect_do> and L</on_disconnect_do> use.
427 Will execute the scalar as SQL.
431 Taken to be arguments to L<DBI/do>, the SQL string optionally followed by the
432 attributes hashref and bind values.
434 =item a code reference
436 Will execute C<< $code->($storage) >> and execute the return array refs as
443 Execute any statements necessary to initialize the database session to return
444 and accept datetime/timestamp values used with
445 L<DBIx::Class::InflateColumn::DateTime>.
447 Only necessary for some databases, see your specific storage driver for
448 implementation details.
452 =item on_disconnect_call
454 Takes arguments in the same form as L</on_connect_call> and executes them
455 immediately before disconnecting from the database.
457 Calls the C<disconnect_call_METHOD> methods as opposed to the
458 C<connect_call_METHOD> methods called by L</on_connect_call>.
460 Note, this only runs if you explicitly call L</disconnect> on the
463 =item disable_sth_caching
465 If set to a true value, this option will disable the caching of
466 statement handles via L<DBI/prepare_cached>.
470 Sets a specific SQL::Abstract::Limit-style limit dialect, overriding the
471 default L</sql_limit_dialect> setting of the storage (if any). For a list
472 of available limit dialects see L<DBIx::Class::SQLMaker::LimitDialects>.
476 When true automatically sets L</quote_char> and L</name_sep> to the characters
477 appropriate for your particular RDBMS. This option is preferred over specifying
478 L</quote_char> directly.
482 Specifies what characters to use to quote table and column names.
484 C<quote_char> expects either a single character, in which case is it
485 is placed on either side of the table/column name, or an arrayref of length
486 2 in which case the table/column name is placed between the elements.
488 For example under MySQL you should use C<< quote_char => '`' >>, and for
489 SQL Server you should use C<< quote_char => [qw/[ ]/] >>.
493 This parameter is only useful in conjunction with C<quote_char>, and is used to
494 specify the character that separates elements (schemas, tables, columns) from
495 each other. If unspecified it defaults to the most commonly used C<.>.
499 This Storage driver normally installs its own C<HandleError>, sets
500 C<RaiseError> and C<ShowErrorStatement> on, and sets C<PrintError> off on
501 all database handles, including those supplied by a coderef. It does this
502 so that it can have consistent and useful error behavior.
504 If you set this option to a true value, Storage will not do its usual
505 modifications to the database handle's attributes, and instead relies on
506 the settings in your connect_info DBI options (or the values you set in
507 your connection coderef, in the case that you are connecting via coderef).
509 Note that your custom settings can cause Storage to malfunction,
510 especially if you set a C<HandleError> handler that suppresses exceptions
511 and/or disable C<RaiseError>.
515 If this option is true, L<DBIx::Class> will use savepoints when nesting
516 transactions, making it possible to recover from failure in the inner
517 transaction without having to abort all outer transactions.
521 Use this argument to supply a cursor class other than the default
522 L<DBIx::Class::Storage::DBI::Cursor>.
526 Some real-life examples of arguments to L</connect_info> and
527 L<DBIx::Class::Schema/connect>
529 # Simple SQLite connection
530 ->connect_info([ 'dbi:SQLite:./foo.db' ]);
533 ->connect_info([ sub { DBI->connect(...) } ]);
535 # Connect via subref in hashref
537 dbh_maker => sub { DBI->connect(...) },
538 on_connect_do => 'alter session ...',
541 # A bit more complicated
548 { quote_char => q{"} },
552 # Equivalent to the previous example
558 { AutoCommit => 1, quote_char => q{"}, name_sep => q{.} },
562 # Same, but with hashref as argument
563 # See parse_connect_info for explanation
566 dsn => 'dbi:Pg:dbname=foo',
568 password => 'my_pg_password',
575 # Subref + DBIx::Class-specific connection options
578 sub { DBI->connect(...) },
582 on_connect_do => ['SET search_path TO myschema,otherschema,public'],
583 disable_sth_caching => 1,
593 my ($self, $info) = @_;
595 return $self->_connect_info if !$info;
597 $self->_connect_info($info); # copy for _connect_info
599 $info = $self->_normalize_connect_info($info)
600 if ref $info eq 'ARRAY';
602 for my $storage_opt (keys %{ $info->{storage_options} }) {
603 my $value = $info->{storage_options}{$storage_opt};
605 $self->$storage_opt($value);
608 # Kill sql_maker/_sql_maker_opts, so we get a fresh one with only
609 # the new set of options
610 $self->_sql_maker(undef);
611 $self->_sql_maker_opts({});
613 for my $sql_maker_opt (keys %{ $info->{sql_maker_options} }) {
614 my $value = $info->{sql_maker_options}{$sql_maker_opt};
616 $self->_sql_maker_opts->{$sql_maker_opt} = $value;
620 %{ $self->_default_dbi_connect_attributes || {} },
621 %{ $info->{attributes} || {} },
624 my @args = @{ $info->{arguments} };
626 if (keys %attrs and ref $args[0] ne 'CODE') {
628 'You provided explicit AutoCommit => 0 in your connection_info. '
629 . 'This is almost universally a bad idea (see the footnotes of '
630 . 'DBIx::Class::Storage::DBI for more info). If you still want to '
631 . 'do this you can set $ENV{DBIC_UNSAFE_AUTOCOMMIT_OK} to disable '
633 if ! $attrs{AutoCommit} and ! $ENV{DBIC_UNSAFE_AUTOCOMMIT_OK};
635 push @args, \%attrs if keys %attrs;
637 $self->_dbi_connect_info(\@args);
640 # save attributes them in a separate accessor so they are always
641 # introspectable, even in case of a CODE $dbhmaker
642 $self->_dbic_connect_attributes (\%attrs);
644 return $self->_connect_info;
647 sub _normalize_connect_info {
648 my ($self, $info_arg) = @_;
651 my @args = @$info_arg; # take a shallow copy for further mutilation
653 # combine/pre-parse arguments depending on invocation style
656 if (ref $args[0] eq 'CODE') { # coderef with optional \%extra_attributes
657 %attrs = %{ $args[1] || {} };
660 elsif (ref $args[0] eq 'HASH') { # single hashref (i.e. Catalyst config)
661 %attrs = %{$args[0]};
663 if (my $code = delete $attrs{dbh_maker}) {
666 my @ignored = grep { delete $attrs{$_} } (qw/dsn user password/);
669 'Attribute(s) %s in connect_info were ignored, as they can not be applied '
670 . "to the result of 'dbh_maker'",
672 join (', ', map { "'$_'" } (@ignored) ),
677 @args = delete @attrs{qw/dsn user password/};
680 else { # otherwise assume dsn/user/password + \%attrs + \%extra_attrs
682 % { $args[3] || {} },
683 % { $args[4] || {} },
685 @args = @args[0,1,2];
688 $info{arguments} = \@args;
690 my @storage_opts = grep exists $attrs{$_},
691 @storage_options, 'cursor_class';
693 @{ $info{storage_options} }{@storage_opts} =
694 delete @attrs{@storage_opts} if @storage_opts;
696 my @sql_maker_opts = grep exists $attrs{$_},
697 qw/limit_dialect quote_char name_sep quote_names/;
699 @{ $info{sql_maker_options} }{@sql_maker_opts} =
700 delete @attrs{@sql_maker_opts} if @sql_maker_opts;
702 $info{attributes} = \%attrs if %attrs;
707 sub _default_dbi_connect_attributes () {
712 ShowErrorStatement => 1,
718 This method is deprecated in favour of setting via L</connect_info>.
722 =head2 on_disconnect_do
724 This method is deprecated in favour of setting via L</connect_info>.
728 sub _parse_connect_do {
729 my ($self, $type) = @_;
731 my $val = $self->$type;
732 return () if not defined $val;
737 push @res, [ 'do_sql', $val ];
738 } elsif (ref($val) eq 'CODE') {
740 } elsif (ref($val) eq 'ARRAY') {
741 push @res, map { [ 'do_sql', $_ ] } @$val;
743 $self->throw_exception("Invalid type for $type: ".ref($val));
751 Arguments: ($subref | $method_name), @extra_coderef_args?
753 Execute the given $subref or $method_name using the new exception-based
754 connection management.
756 The first two arguments will be the storage object that C<dbh_do> was called
757 on and a database handle to use. Any additional arguments will be passed
758 verbatim to the called subref as arguments 2 and onwards.
760 Using this (instead of $self->_dbh or $self->dbh) ensures correct
761 exception handling and reconnection (or failover in future subclasses).
763 Your subref should have no side-effects outside of the database, as
764 there is the potential for your subref to be partially double-executed
765 if the database connection was stale/dysfunctional.
769 my @stuff = $schema->storage->dbh_do(
771 my ($storage, $dbh, @cols) = @_;
772 my $cols = join(q{, }, @cols);
773 $dbh->selectrow_array("SELECT $cols FROM foo");
782 my $run_target = shift;
784 # short circuit when we know there is no need for a runner
786 # FIXME - asumption may be wrong
787 # the rationale for the txn_depth check is that if this block is a part
788 # of a larger transaction, everything up to that point is screwed anyway
789 return $self->$run_target($self->_get_dbh, @_)
790 if $self->{_in_do_block} or $self->transaction_depth;
794 DBIx::Class::Storage::BlockRunner->new(
796 run_code => sub { $self->$run_target ($self->_get_dbh, @$args ) },
798 retry_handler => sub { ! ( $_[0]->retried_count or $_[0]->storage->connected ) },
803 $_[0]->_get_dbh; # connects or reconnects on pid change, necessary to grab correct txn_depth
804 shift->next::method(@_);
809 Our C<disconnect> method also performs a rollback first if the
810 database is not in C<AutoCommit> mode.
820 push @actions, ( $self->on_disconnect_call || () );
821 push @actions, $self->_parse_connect_do ('on_disconnect_do');
823 $self->_do_connection_actions(disconnect_call_ => $_) for @actions;
825 # stops the "implicit rollback on disconnect" warning
826 $self->_exec_txn_rollback unless $self->_dbh_autocommit;
828 %{ $self->_dbh->{CachedKids} } = ();
829 $self->_dbh->disconnect;
835 =head2 with_deferred_fk_checks
839 =item Arguments: C<$coderef>
841 =item Return Value: The return value of $coderef
845 Storage specific method to run the code ref with FK checks deferred or
846 in MySQL's case disabled entirely.
850 # Storage subclasses should override this
851 sub with_deferred_fk_checks {
852 my ($self, $sub) = @_;
860 =item Arguments: none
862 =item Return Value: 1|0
866 Verifies that the current database handle is active and ready to execute
867 an SQL statement (e.g. the connection did not get stale, server is still
868 answering, etc.) This method is used internally by L</dbh>.
874 return 0 unless $self->_seems_connected;
877 local $self->_dbh->{RaiseError} = 1;
882 sub _seems_connected {
887 my $dbh = $self->_dbh
890 return $dbh->FETCH('Active');
896 my $dbh = $self->_dbh or return 0;
901 sub ensure_connected {
904 unless ($self->connected) {
905 $self->_populate_dbh;
911 Returns a C<$dbh> - a data base handle of class L<DBI>. The returned handle
912 is guaranteed to be healthy by implicitly calling L</connected>, and if
913 necessary performing a reconnection before returning. Keep in mind that this
914 is very B<expensive> on some database engines. Consider using L</dbh_do>
922 if (not $self->_dbh) {
923 $self->_populate_dbh;
925 $self->ensure_connected;
930 # this is the internal "get dbh or connect (don't check)" method
934 $self->_populate_dbh unless $self->_dbh;
940 unless ($self->_sql_maker) {
941 my $sql_maker_class = $self->sql_maker_class;
943 my %opts = %{$self->_sql_maker_opts||{}};
947 $self->sql_limit_dialect
950 my $s_class = (ref $self) || $self;
952 "Your storage class ($s_class) does not set sql_limit_dialect and you "
953 . 'have not supplied an explicit limit_dialect in your connection_info. '
954 . 'DBIC will attempt to use the GenericSubQ dialect, which works on most '
955 . 'databases but can be (and often is) painfully slow. '
956 . "Please file an RT ticket against '$s_class' ."
963 my ($quote_char, $name_sep);
965 if ($opts{quote_names}) {
966 $quote_char = (delete $opts{quote_char}) || $self->sql_quote_char || do {
967 my $s_class = (ref $self) || $self;
969 "You requested 'quote_names' but your storage class ($s_class) does "
970 . 'not explicitly define a default sql_quote_char and you have not '
971 . 'supplied a quote_char as part of your connection_info. DBIC will '
972 .q{default to the ANSI SQL standard quote '"', which works most of }
973 . "the time. Please file an RT ticket against '$s_class'."
979 $name_sep = (delete $opts{name_sep}) || $self->sql_name_sep;
982 $self->_sql_maker($sql_maker_class->new(
984 array_datatypes => 1,
985 limit_dialect => $dialect,
986 ($quote_char ? (quote_char => $quote_char) : ()),
987 name_sep => ($name_sep || '.'),
991 return $self->_sql_maker;
994 # nothing to do by default
1001 my @info = @{$self->_dbi_connect_info || []};
1002 $self->_dbh(undef); # in case ->connected failed we might get sent here
1003 $self->_dbh_details({}); # reset everything we know
1005 $self->_dbh($self->_connect(@info));
1007 $self->_conn_pid($$) if $^O ne 'MSWin32'; # on win32 these are in fact threads
1009 $self->_determine_driver;
1011 # Always set the transaction depth on connect, since
1012 # there is no transaction in progress by definition
1013 $self->{transaction_depth} = $self->_dbh_autocommit ? 0 : 1;
1015 $self->_run_connection_actions unless $self->{_in_determine_driver};
1018 sub _run_connection_actions {
1022 push @actions, ( $self->on_connect_call || () );
1023 push @actions, $self->_parse_connect_do ('on_connect_do');
1025 $self->_do_connection_actions(connect_call_ => $_) for @actions;
1030 sub set_use_dbms_capability {
1031 $_[0]->set_inherited ($_[1], $_[2]);
1034 sub get_use_dbms_capability {
1035 my ($self, $capname) = @_;
1037 my $use = $self->get_inherited ($capname);
1040 : do { $capname =~ s/^_use_/_supports_/; $self->get_dbms_capability ($capname) }
1044 sub set_dbms_capability {
1045 $_[0]->_dbh_details->{capability}{$_[1]} = $_[2];
1048 sub get_dbms_capability {
1049 my ($self, $capname) = @_;
1051 my $cap = $self->_dbh_details->{capability}{$capname};
1053 unless (defined $cap) {
1054 if (my $meth = $self->can ("_determine$capname")) {
1055 $cap = $self->$meth ? 1 : 0;
1061 $self->set_dbms_capability ($capname, $cap);
1071 unless ($info = $self->_dbh_details->{info}) {
1075 my $server_version = try { $self->_get_server_version };
1077 if (defined $server_version) {
1078 $info->{dbms_version} = $server_version;
1080 my ($numeric_version) = $server_version =~ /^([\d\.]+)/;
1081 my @verparts = split (/\./, $numeric_version);
1087 # consider only up to 3 version parts, iff not more than 3 digits
1089 while (@verparts && @use_parts < 3) {
1090 my $p = shift @verparts;
1092 push @use_parts, $p;
1094 push @use_parts, 0 while @use_parts < 3;
1096 $info->{normalized_dbms_version} = sprintf "%d.%03d%03d", @use_parts;
1100 $self->_dbh_details->{info} = $info;
1106 sub _get_server_version {
1107 shift->_dbh_get_info(18);
1111 my ($self, $info) = @_;
1113 return try { $self->_get_dbh->get_info($info) } || undef;
1116 sub _determine_driver {
1119 if ((not $self->_driver_determined) && (not $self->{_in_determine_driver})) {
1120 my $started_connected = 0;
1121 local $self->{_in_determine_driver} = 1;
1123 if (ref($self) eq __PACKAGE__) {
1125 if ($self->_dbh) { # we are connected
1126 $driver = $self->_dbh->{Driver}{Name};
1127 $started_connected = 1;
1129 # if connect_info is a CODEREF, we have no choice but to connect
1130 if (ref $self->_dbi_connect_info->[0] &&
1131 reftype $self->_dbi_connect_info->[0] eq 'CODE') {
1132 $self->_populate_dbh;
1133 $driver = $self->_dbh->{Driver}{Name};
1136 # try to use dsn to not require being connected, the driver may still
1137 # force a connection in _rebless to determine version
1138 # (dsn may not be supplied at all if all we do is make a mock-schema)
1139 my $dsn = $self->_dbi_connect_info->[0] || $ENV{DBI_DSN} || '';
1140 ($driver) = $dsn =~ /dbi:([^:]+):/i;
1141 $driver ||= $ENV{DBI_DRIVER};
1146 my $storage_class = "DBIx::Class::Storage::DBI::${driver}";
1147 if ($self->load_optional_class($storage_class)) {
1148 mro::set_mro($storage_class, 'c3');
1149 bless $self, $storage_class;
1155 $self->_driver_determined(1);
1157 Class::C3->reinitialize() if DBIx::Class::_ENV_::OLD_MRO;
1159 $self->_init; # run driver-specific initializations
1161 $self->_run_connection_actions
1162 if !$started_connected && defined $self->_dbh;
1166 sub _do_connection_actions {
1168 my $method_prefix = shift;
1171 if (not ref($call)) {
1172 my $method = $method_prefix . $call;
1174 } elsif (ref($call) eq 'CODE') {
1176 } elsif (ref($call) eq 'ARRAY') {
1177 if (ref($call->[0]) ne 'ARRAY') {
1178 $self->_do_connection_actions($method_prefix, $_) for @$call;
1180 $self->_do_connection_actions($method_prefix, @$_) for @$call;
1183 $self->throw_exception (sprintf ("Don't know how to process conection actions of type '%s'", ref($call)) );
1189 sub connect_call_do_sql {
1191 $self->_do_query(@_);
1194 sub disconnect_call_do_sql {
1196 $self->_do_query(@_);
1199 # override in db-specific backend when necessary
1200 sub connect_call_datetime_setup { 1 }
1203 my ($self, $action) = @_;
1205 if (ref $action eq 'CODE') {
1206 $action = $action->($self);
1207 $self->_do_query($_) foreach @$action;
1210 # Most debuggers expect ($sql, @bind), so we need to exclude
1211 # the attribute hash which is the second argument to $dbh->do
1212 # furthermore the bind values are usually to be presented
1213 # as named arrayref pairs, so wrap those here too
1214 my @do_args = (ref $action eq 'ARRAY') ? (@$action) : ($action);
1215 my $sql = shift @do_args;
1216 my $attrs = shift @do_args;
1217 my @bind = map { [ undef, $_ ] } @do_args;
1219 $self->_query_start($sql, \@bind);
1220 $self->_get_dbh->do($sql, $attrs, @do_args);
1221 $self->_query_end($sql, \@bind);
1228 my ($self, @info) = @_;
1230 $self->throw_exception("You failed to provide any connection info")
1233 my ($old_connect_via, $dbh);
1235 if ($INC{'Apache/DBI.pm'} && $ENV{MOD_PERL}) {
1236 $old_connect_via = $DBI::connect_via;
1237 $DBI::connect_via = 'connect';
1241 if(ref $info[0] eq 'CODE') {
1242 $dbh = $info[0]->();
1246 $dbh = DBI->connect(@info);
1253 unless ($self->unsafe) {
1255 $self->throw_exception(
1256 'Refusing clobbering of {HandleError} installed on externally supplied '
1257 ."DBI handle $dbh. Either remove the handler or use the 'unsafe' attribute."
1258 ) if $dbh->{HandleError} and ref $dbh->{HandleError} ne '__DBIC__DBH__ERROR__HANDLER__';
1260 # Default via _default_dbi_connect_attributes is 1, hence it was an explicit
1261 # request, or an external handle. Complain and set anyway
1262 unless ($dbh->{RaiseError}) {
1263 carp( ref $info[0] eq 'CODE'
1265 ? "The 'RaiseError' of the externally supplied DBI handle is set to false. "
1266 ."DBIx::Class will toggle it back to true, unless the 'unsafe' connect "
1267 .'attribute has been supplied'
1269 : 'RaiseError => 0 supplied in your connection_info, without an explicit '
1270 .'unsafe => 1. Toggling RaiseError back to true'
1273 $dbh->{RaiseError} = 1;
1276 # this odd anonymous coderef dereference is in fact really
1277 # necessary to avoid the unwanted effect described in perl5
1280 my $weak_self = $_[0];
1283 # the coderef is blessed so we can distinguish it from externally
1284 # supplied handles (which must be preserved)
1285 $_[1]->{HandleError} = bless sub {
1287 $weak_self->throw_exception("DBI Exception: $_[0]");
1290 # the handler may be invoked by something totally out of
1292 DBIx::Class::Exception->throw("DBI Exception (unhandled by DBIC, ::Schema GCed): $_[0]");
1294 }, '__DBIC__DBH__ERROR__HANDLER__';
1299 $self->throw_exception("DBI Connection failed: $_")
1302 $DBI::connect_via = $old_connect_via if $old_connect_via;
1305 $self->_dbh_autocommit($dbh->{AutoCommit});
1312 # this means we have not yet connected and do not know the AC status
1313 # (e.g. coderef $dbh), need a full-fledged connection check
1314 if (! defined $self->_dbh_autocommit) {
1315 $self->ensure_connected;
1317 # Otherwise simply connect or re-connect on pid changes
1322 $self->next::method(@_);
1325 sub _exec_txn_begin {
1328 # if the user is utilizing txn_do - good for him, otherwise we need to
1329 # ensure that the $dbh is healthy on BEGIN.
1330 # We do this via ->dbh_do instead of ->dbh, so that the ->dbh "ping"
1331 # will be replaced by a failure of begin_work itself (which will be
1332 # then retried on reconnect)
1333 if ($self->{_in_do_block}) {
1334 $self->_dbh->begin_work;
1336 $self->dbh_do(sub { $_[1]->begin_work });
1343 $self->_verify_pid if $self->_dbh;
1344 $self->throw_exception("Unable to txn_commit() on a disconnected storage")
1347 # esoteric case for folks using external $dbh handles
1348 if (! $self->transaction_depth and ! $self->_dbh->FETCH('AutoCommit') ) {
1349 carp "Storage transaction_depth 0 does not match "
1350 ."false AutoCommit of $self->{_dbh}, attempting COMMIT anyway";
1351 $self->transaction_depth(1);
1354 $self->next::method(@_);
1356 # if AutoCommit is disabled txn_depth never goes to 0
1357 # as a new txn is started immediately on commit
1358 $self->transaction_depth(1) if (
1359 !$self->transaction_depth
1361 defined $self->_dbh_autocommit
1363 ! $self->_dbh_autocommit
1367 sub _exec_txn_commit {
1368 shift->_dbh->commit;
1374 $self->_verify_pid if $self->_dbh;
1375 $self->throw_exception("Unable to txn_rollback() on a disconnected storage")
1378 # esoteric case for folks using external $dbh handles
1379 if (! $self->transaction_depth and ! $self->_dbh->FETCH('AutoCommit') ) {
1380 carp "Storage transaction_depth 0 does not match "
1381 ."false AutoCommit of $self->{_dbh}, attempting ROLLBACK anyway";
1382 $self->transaction_depth(1);
1385 $self->next::method(@_);
1387 # if AutoCommit is disabled txn_depth never goes to 0
1388 # as a new txn is started immediately on commit
1389 $self->transaction_depth(1) if (
1390 !$self->transaction_depth
1392 defined $self->_dbh_autocommit
1394 ! $self->_dbh_autocommit
1398 sub _exec_txn_rollback {
1399 shift->_dbh->rollback;
1402 # generate some identical methods
1403 for my $meth (qw/svp_begin svp_release svp_rollback/) {
1405 *{__PACKAGE__ ."::$meth"} = subname $meth => sub {
1407 $self->_verify_pid if $self->_dbh;
1408 $self->throw_exception("Unable to $meth() on a disconnected storage")
1410 $self->next::method(@_);
1414 # This used to be the top-half of _execute. It was split out to make it
1415 # easier to override in NoBindVars without duping the rest. It takes up
1416 # all of _execute's args, and emits $sql, @bind.
1417 sub _prep_for_execute {
1418 #my ($self, $op, $ident, $args) = @_;
1419 return shift->_gen_sql_bind(@_)
1423 my ($self, $op, $ident, $args) = @_;
1425 my ($sql, @bind) = $self->sql_maker->$op(
1426 blessed($ident) ? $ident->from : $ident,
1431 ! $ENV{DBIC_DT_SEARCH_OK}
1435 first { blessed($_->[1]) && $_->[1]->isa('DateTime') } @bind
1437 carp_unique 'DateTime objects passed to search() are not supported '
1438 . 'properly (InflateColumn::DateTime formats and settings are not '
1439 . 'respected.) See "Formatting DateTime objects in queries" in '
1440 . 'DBIx::Class::Manual::Cookbook. To disable this warning for good '
1441 . 'set $ENV{DBIC_DT_SEARCH_OK} to true'
1444 return( $sql, $self->_resolve_bindattrs(
1445 $ident, [ @{$args->[2]{bind}||[]}, @bind ]
1449 sub _resolve_bindattrs {
1450 my ($self, $ident, $bind, $colinfos) = @_;
1454 my $resolve_bindinfo = sub {
1455 #my $infohash = shift;
1457 %$colinfos = %{ $self->_resolve_column_info($ident) }
1458 unless keys %$colinfos;
1461 if (my $col = $_[0]->{dbic_colname}) {
1462 $ret = { %{$_[0]} };
1464 $ret->{sqlt_datatype} ||= $colinfos->{$col}{data_type}
1465 if $colinfos->{$col}{data_type};
1467 $ret->{sqlt_size} ||= $colinfos->{$col}{size}
1468 if $colinfos->{$col}{size};
1475 if (ref $_ ne 'ARRAY') {
1478 elsif (! defined $_->[0]) {
1481 elsif (ref $_->[0] eq 'HASH') {
1483 ($_->[0]{dbd_attrs} or $_->[0]{sqlt_datatype}) ? $_->[0] : $resolve_bindinfo->($_->[0]),
1487 elsif (ref $_->[0] eq 'SCALAR') {
1488 [ { sqlt_datatype => ${$_->[0]} }, $_->[1] ]
1491 [ $resolve_bindinfo->({ dbic_colname => $_->[0] }), $_->[1] ]
1496 sub _format_for_trace {
1497 #my ($self, $bind) = @_;
1499 ### Turn @bind from something like this:
1500 ### ( [ "artist", 1 ], [ \%attrs, 3 ] )
1502 ### ( "'1'", "'3'" )
1505 defined( $_ && $_->[1] )
1512 my ( $self, $sql, $bind ) = @_;
1514 $self->debugobj->query_start( $sql, $self->_format_for_trace($bind) )
1519 my ( $self, $sql, $bind ) = @_;
1521 $self->debugobj->query_end( $sql, $self->_format_for_trace($bind) )
1526 sub _dbi_attrs_for_bind {
1527 my ($self, $ident, $bind) = @_;
1529 if (! defined $sba_compat) {
1530 $self->_determine_driver;
1531 $sba_compat = $self->can('source_bind_attributes') == \&source_bind_attributes
1539 my $class = ref $self;
1541 "The source_bind_attributes() override in $class relies on a deprecated codepath. "
1542 .'You are strongly advised to switch your code to override bind_attribute_by_datatype() '
1543 .'instead. This legacy compat shim will also disappear some time before DBIC 0.09'
1546 my $sba_attrs = $self->source_bind_attributes
1551 for (map { $_->[0] } @$bind) {
1553 if (exists $_->{dbd_attrs}) {
1556 elsif($_->{sqlt_datatype}) {
1557 # cache the result in the dbh_details hash, as it can not change unless
1558 # we connect to something else
1559 my $cache = $self->_dbh_details->{_datatype_map_cache} ||= {};
1560 if (not exists $cache->{$_->{sqlt_datatype}}) {
1561 $cache->{$_->{sqlt_datatype}} = $self->bind_attribute_by_data_type($_->{sqlt_datatype}) || undef;
1563 $cache->{$_->{sqlt_datatype}};
1565 elsif ($sba_attrs and $_->{dbic_colname}) {
1566 $sba_attrs->{$_->{dbic_colname}} || undef;
1569 undef; # always push something at this position
1578 my ($self, $op, $ident, @args) = @_;
1580 my ($sql, $bind) = $self->_prep_for_execute($op, $ident, \@args);
1582 shift->dbh_do( # retry over disconnects
1586 $self->_dbi_attrs_for_bind($ident, $bind)
1591 my ($self, undef, $sql, $bind, $bind_attrs) = @_;
1593 $self->_query_start( $sql, $bind );
1594 my $sth = $self->_sth($sql);
1596 for my $i (0 .. $#$bind) {
1597 if (ref $bind->[$i][1] eq 'SCALAR') { # any scalarrefs are assumed to be bind_inouts
1598 $sth->bind_param_inout(
1599 $i + 1, # bind params counts are 1-based
1601 $bind->[$i][0]{dbd_size} || $self->_max_column_bytesize($bind->[$i][0]), # size
1608 (ref $bind->[$i][1] and overload::Method($bind->[$i][1], '""'))
1617 # Can this fail without throwing an exception anyways???
1618 my $rv = $sth->execute();
1619 $self->throw_exception(
1620 $sth->errstr || $sth->err || 'Unknown error: execute() returned false, but error flags were not set...'
1623 $self->_query_end( $sql, $bind );
1625 return (wantarray ? ($rv, $sth, @$bind) : $rv);
1628 sub _prefetch_autovalues {
1629 my ($self, $source, $to_insert) = @_;
1631 my $colinfo = $source->columns_info;
1634 for my $col (keys %$colinfo) {
1636 $colinfo->{$col}{auto_nextval}
1639 ! exists $to_insert->{$col}
1641 ref $to_insert->{$col} eq 'SCALAR'
1643 (ref $to_insert->{$col} eq 'REF' and ref ${$to_insert->{$col}} eq 'ARRAY')
1646 $values{$col} = $self->_sequence_fetch(
1648 ( $colinfo->{$col}{sequence} ||=
1649 $self->_dbh_get_autoinc_seq($self->_get_dbh, $source, $col)
1659 my ($self, $source, $to_insert) = @_;
1661 my $prefetched_values = $self->_prefetch_autovalues($source, $to_insert);
1663 # fuse the values, but keep a separate list of prefetched_values so that
1664 # they can be fused once again with the final return
1665 $to_insert = { %$to_insert, %$prefetched_values };
1667 my $col_infos = $source->columns_info;
1668 my %pcols = map { $_ => 1 } $source->primary_columns;
1670 for my $col ($source->columns) {
1671 # nothing to retrieve when explicit values are supplied
1672 next if (defined $to_insert->{$col} and ! (
1673 ref $to_insert->{$col} eq 'SCALAR'
1675 (ref $to_insert->{$col} eq 'REF' and ref ${$to_insert->{$col}} eq 'ARRAY')
1678 # the 'scalar keys' is a trick to preserve the ->columns declaration order
1679 $retrieve_cols{$col} = scalar keys %retrieve_cols if (
1682 $col_infos->{$col}{retrieve_on_insert}
1686 my ($sqla_opts, @ir_container);
1687 if (%retrieve_cols and $self->_use_insert_returning) {
1688 $sqla_opts->{returning_container} = \@ir_container
1689 if $self->_use_insert_returning_bound;
1691 $sqla_opts->{returning} = [
1692 sort { $retrieve_cols{$a} <=> $retrieve_cols{$b} } keys %retrieve_cols
1696 my ($rv, $sth) = $self->_execute('insert', $source, $to_insert, $sqla_opts);
1698 my %returned_cols = %$to_insert;
1699 if (my $retlist = $sqla_opts->{returning}) { # if IR is supported - we will get everything in one set
1700 @ir_container = try {
1701 local $SIG{__WARN__} = sub {};
1702 my @r = $sth->fetchrow_array;
1705 } unless @ir_container;
1707 @returned_cols{@$retlist} = @ir_container if @ir_container;
1710 # pull in PK if needed and then everything else
1711 if (my @missing_pri = grep { $pcols{$_} } keys %retrieve_cols) {
1713 $self->throw_exception( "Missing primary key but Storage doesn't support last_insert_id" )
1714 unless $self->can('last_insert_id');
1716 my @pri_values = $self->last_insert_id($source, @missing_pri);
1718 $self->throw_exception( "Can't get last insert id" )
1719 unless (@pri_values == @missing_pri);
1721 @returned_cols{@missing_pri} = @pri_values;
1722 delete $retrieve_cols{$_} for @missing_pri;
1725 # if there is more left to pull
1726 if (%retrieve_cols) {
1727 $self->throw_exception(
1728 'Unable to retrieve additional columns without a Primary Key on ' . $source->source_name
1731 my @left_to_fetch = sort { $retrieve_cols{$a} <=> $retrieve_cols{$b} } keys %retrieve_cols;
1733 my $cur = DBIx::Class::ResultSet->new($source, {
1734 where => { map { $_ => $returned_cols{$_} } (keys %pcols) },
1735 select => \@left_to_fetch,
1738 @returned_cols{@left_to_fetch} = $cur->next;
1740 $self->throw_exception('Duplicate row returned for PK-search after fresh insert')
1741 if scalar $cur->next;
1745 return { %$prefetched_values, %returned_cols };
1749 my ($self, $source, $cols, $data) = @_;
1751 my @col_range = (0..$#$cols);
1753 # FIXME - perhaps this is not even needed? does DBI stringify?
1755 # forcibly stringify whatever is stringifiable
1756 # ResultSet::populate() hands us a copy - safe to mangle
1757 for my $r (0 .. $#$data) {
1758 for my $c (0 .. $#{$data->[$r]}) {
1759 $data->[$r][$c] = "$data->[$r][$c]"
1760 if ( ref $data->[$r][$c] and overload::Method($data->[$r][$c], '""') );
1764 my $colinfo_cache = {}; # since we will run _resolve_bindattrs on the same $source a lot
1766 # get a slice type index based on first row of data
1767 # a "column" in this context may refer to more than one bind value
1768 # e.g. \[ '?, ?', [...], [...] ]
1770 # construct the value type index - a description of values types for every
1771 # per-column slice of $data:
1773 # nonexistent - nonbind literal
1775 # [] of bindattrs - resolved attribute(s) of bind(s) passed via literal+bind \[] combo
1777 # also construct the column hash to pass to the SQL generator. For plain
1778 # (non literal) values - convert the members of the first row into a
1779 # literal+bind combo, with extra positional info in the bind attr hashref.
1780 # This will allow us to match the order properly, and is so contrived
1781 # because a user-supplied literal/bind (or something else specific to a
1782 # resultsource and/or storage driver) can inject extra binds along the
1783 # way, so one can't rely on "shift positions" ordering at all. Also we
1784 # can't just hand SQLA a set of some known "values" (e.g. hashrefs that
1785 # can be later matched up by address), because we want to supply a real
1786 # value on which perhaps e.g. datatype checks will be performed
1787 my ($proto_data, $value_type_idx);
1788 for my $i (@col_range) {
1789 my $colname = $cols->[$i];
1790 if (ref $data->[0][$i] eq 'SCALAR') {
1791 # no bind value at all - no type
1793 $proto_data->{$colname} = $data->[0][$i];
1795 elsif (ref $data->[0][$i] eq 'REF' and ref ${$data->[0][$i]} eq 'ARRAY' ) {
1796 # repack, so we don't end up mangling the original \[]
1797 my ($sql, @bind) = @${$data->[0][$i]};
1799 # normalization of user supplied stuff
1800 my $resolved_bind = $self->_resolve_bindattrs(
1801 $source, \@bind, $colinfo_cache,
1804 # store value-less (attrs only) bind info - we will be comparing all
1805 # supplied binds against this for sanity
1806 $value_type_idx->{$i} = [ map { $_->[0] } @$resolved_bind ];
1808 $proto_data->{$colname} = \[ $sql, map { [
1809 # inject slice order to use for $proto_bind construction
1810 { %{$resolved_bind->[$_][0]}, _bind_data_slice_idx => $i }
1812 $resolved_bind->[$_][1]
1817 $value_type_idx->{$i} = 0;
1819 $proto_data->{$colname} = \[ '?', [
1820 { dbic_colname => $colname, _bind_data_slice_idx => $i }
1827 my ($sql, $proto_bind) = $self->_prep_for_execute (
1833 if (! @$proto_bind and keys %$value_type_idx) {
1834 # if the bindlist is empty and we had some dynamic binds, this means the
1835 # storage ate them away (e.g. the NoBindVars component) and interpolated
1836 # them directly into the SQL. This obviously can't be good for multi-inserts
1837 $self->throw_exception('Cannot insert_bulk without support for placeholders');
1841 # FIXME - devise a flag "no babysitting" or somesuch to shut this off
1843 # use an error reporting closure for convenience (less to pass)
1844 my $bad_slice_report_cref = sub {
1845 my ($msg, $r_idx, $c_idx) = @_;
1846 $self->throw_exception(sprintf "%s for column '%s' in populate slice:\n%s",
1850 require Data::Dumper::Concise;
1851 local $Data::Dumper::Maxdepth = 5;
1852 Data::Dumper::Concise::Dumper ({
1853 map { $cols->[$_] =>
1861 for my $col_idx (@col_range) {
1862 my $reference_val = $data->[0][$col_idx];
1864 for my $row_idx (1..$#$data) { # we are comparing against what we got from [0] above, hence start from 1
1865 my $val = $data->[$row_idx][$col_idx];
1867 if (! exists $value_type_idx->{$col_idx}) { # literal no binds
1868 if (ref $val ne 'SCALAR') {
1869 $bad_slice_report_cref->(
1870 "Incorrect value (expecting SCALAR-ref \\'$$reference_val')",
1875 elsif ($$val ne $$reference_val) {
1876 $bad_slice_report_cref->(
1877 "Inconsistent literal SQL value (expecting \\'$$reference_val')",
1883 elsif (! $value_type_idx->{$col_idx} ) { # regular non-literal value
1884 if (ref $val eq 'SCALAR' or (ref $val eq 'REF' and ref $$val eq 'ARRAY') ) {
1885 $bad_slice_report_cref->("Literal SQL found where a plain bind value is expected", $row_idx, $col_idx);
1888 else { # binds from a \[], compare type and attrs
1889 if (ref $val ne 'REF' or ref $$val ne 'ARRAY') {
1890 $bad_slice_report_cref->(
1891 "Incorrect value (expecting ARRAYREF-ref \\['${$reference_val}->[0]', ... ])",
1896 # start drilling down and bail out early on identical refs
1898 $reference_val != $val
1900 $$reference_val != $$val
1902 if (${$val}->[0] ne ${$reference_val}->[0]) {
1903 $bad_slice_report_cref->(
1904 "Inconsistent literal/bind SQL (expecting \\['${$reference_val}->[0]', ... ])",
1909 # need to check the bind attrs - a bind will happen only once for
1910 # the entire dataset, so any changes further down will be ignored.
1911 elsif (! Data::Compare::Compare(
1912 $value_type_idx->{$col_idx},
1916 @{$self->_resolve_bindattrs(
1917 $source, [ @{$$val}[1 .. $#$$val] ], $colinfo_cache,
1921 $bad_slice_report_cref->(
1922 'Differing bind attributes on literal/bind values not supported',
1932 # neither _dbh_execute_for_fetch, nor _dbh_execute_inserts_with_no_binds
1933 # are atomic (even if execute_for_fetch is a single call). Thus a safety
1935 my $guard = $self->txn_scope_guard;
1937 $self->_query_start( $sql, @$proto_bind ? [[undef => '__BULK_INSERT__' ]] : () );
1938 my $sth = $self->_sth($sql);
1941 # proto bind contains the information on which pieces of $data to pull
1942 # $cols is passed in only for prettier error-reporting
1943 $self->_dbh_execute_for_fetch( $source, $sth, $proto_bind, $cols, $data );
1946 # bind_param_array doesn't work if there are no binds
1947 $self->_dbh_execute_inserts_with_no_binds( $sth, scalar @$data );
1951 $self->_query_end( $sql, @$proto_bind ? [[ undef => '__BULK_INSERT__' ]] : () );
1955 return (wantarray ? ($rv, $sth, @$proto_bind) : $rv);
1958 # execute_for_fetch is capable of returning data just fine (it means it
1959 # can be used for INSERT...RETURNING and UPDATE...RETURNING. Since this
1960 # is the void-populate fast-path we will just ignore this altogether
1961 # for the time being.
1962 sub _dbh_execute_for_fetch {
1963 my ($self, $source, $sth, $proto_bind, $cols, $data) = @_;
1965 my @idx_range = ( 0 .. $#$proto_bind );
1967 # If we have any bind attributes to take care of, we will bind the
1968 # proto-bind data (which will never be used by execute_for_fetch)
1969 # However since column bindtypes are "sticky", this is sufficient
1970 # to get the DBD to apply the bindtype to all values later on
1972 my $bind_attrs = $self->_dbi_attrs_for_bind($source, $proto_bind);
1974 for my $i (@idx_range) {
1976 $i+1, # DBI bind indexes are 1-based
1977 $proto_bind->[$i][1],
1979 ) if defined $bind_attrs->[$i];
1982 # At this point $data slots named in the _bind_data_slice_idx of
1983 # each piece of $proto_bind are either \[]s or plain values to be
1984 # passed in. Construct the dispensing coderef. *NOTE* the order
1985 # of $data will differ from this of the ?s in the SQL (due to
1986 # alphabetical ordering by colname). We actually do want to
1987 # preserve this behavior so that prepare_cached has a better
1988 # chance of matching on unrelated calls
1989 my %data_reorder = map { $proto_bind->[$_][0]{_bind_data_slice_idx} => $_ } @idx_range;
1991 my $fetch_row_idx = -1; # saner loop this way
1992 my $fetch_tuple = sub {
1993 return undef if ++$fetch_row_idx > $#$data;
1996 { (ref $_ eq 'REF' and ref $$_ eq 'ARRAY')
1997 ? map { $_->[-1] } @{$$_}[1 .. $#$$_]
2001 { $data->[$fetch_row_idx][$_]}
2003 { $data_reorder{$a} <=> $data_reorder{$b} }
2008 my $tuple_status = [];
2011 $rv = $sth->execute_for_fetch(
2020 # Not all DBDs are create equal. Some throw on error, some return
2021 # an undef $rv, and some set $sth->err - try whatever we can
2022 $err = ($sth->errstr || 'UNKNOWN ERROR ($sth->errstr is unset)') if (
2025 ( !defined $rv or $sth->err )
2028 # Statement must finish even if there was an exception.
2033 $err = shift unless defined $err
2038 ++$i while $i <= $#$tuple_status && !ref $tuple_status->[$i];
2040 $self->throw_exception("Unexpected populate error: $err")
2041 if ($i > $#$tuple_status);
2043 require Data::Dumper::Concise;
2044 $self->throw_exception(sprintf "execute_for_fetch() aborted with '%s' at populate slice:\n%s",
2045 ($tuple_status->[$i][1] || $err),
2046 Data::Dumper::Concise::Dumper( { map { $cols->[$_] => $data->[$i][$_] } (0 .. $#$cols) } ),
2053 sub _dbh_execute_inserts_with_no_binds {
2054 my ($self, $sth, $count) = @_;
2058 my $dbh = $self->_get_dbh;
2059 local $dbh->{RaiseError} = 1;
2060 local $dbh->{PrintError} = 0;
2062 $sth->execute foreach 1..$count;
2068 # Make sure statement is finished even if there was an exception.
2073 $err = shift unless defined $err;
2076 $self->throw_exception($err) if defined $err;
2082 #my ($self, $source, @args) = @_;
2083 shift->_execute('update', @_);
2088 #my ($self, $source, @args) = @_;
2089 shift->_execute('delete', @_);
2094 $self->_execute($self->_select_args(@_));
2097 sub _select_args_to_query {
2100 # my ($op, $ident, $select, $cond, $rs_attrs, $rows, $offset)
2101 # = $self->_select_args($ident, $select, $cond, $attrs);
2102 my ($op, $ident, @args) =
2103 $self->_select_args(@_);
2105 # my ($sql, $prepared_bind) = $self->_gen_sql_bind($op, $ident, [ $select, $cond, $rs_attrs, $rows, $offset ]);
2106 my ($sql, $prepared_bind) = $self->_gen_sql_bind($op, $ident, \@args);
2107 $prepared_bind ||= [];
2110 ? ($sql, $prepared_bind)
2111 : \[ "($sql)", @$prepared_bind ]
2116 my ($self, $ident, $select, $where, $attrs) = @_;
2118 my $sql_maker = $self->sql_maker;
2119 my ($alias2source, $rs_alias) = $self->_resolve_ident_sources ($ident);
2126 $rs_alias && $alias2source->{$rs_alias}
2127 ? ( _rsroot_rsrc => $alias2source->{$rs_alias} )
2132 # Sanity check the attributes (SQLMaker does it too, but
2133 # in case of a software_limit we'll never reach there)
2134 if (defined $attrs->{offset}) {
2135 $self->throw_exception('A supplied offset attribute must be a non-negative integer')
2136 if ( $attrs->{offset} =~ /\D/ or $attrs->{offset} < 0 );
2139 if (defined $attrs->{rows}) {
2140 $self->throw_exception("The rows attribute must be a positive integer if present")
2141 if ( $attrs->{rows} =~ /\D/ or $attrs->{rows} <= 0 );
2143 elsif ($attrs->{offset}) {
2144 # MySQL actually recommends this approach. I cringe.
2145 $attrs->{rows} = $sql_maker->__max_int;
2150 # see if we need to tear the prefetch apart otherwise delegate the limiting to the
2151 # storage, unless software limit was requested
2154 ( $attrs->{rows} && keys %{$attrs->{collapse}} )
2156 # grouped prefetch (to satisfy group_by == select)
2157 ( $attrs->{group_by}
2159 @{$attrs->{group_by}}
2161 $attrs->{_prefetch_selector_range}
2164 ($ident, $select, $where, $attrs)
2165 = $self->_adjust_select_args_for_complex_prefetch ($ident, $select, $where, $attrs);
2167 elsif (! $attrs->{software_limit} ) {
2169 $attrs->{rows} || (),
2170 $attrs->{offset} || (),
2174 # try to simplify the joinmap further (prune unreferenced type-single joins)
2175 $ident = $self->_prune_unused_joins ($ident, $select, $where, $attrs);
2178 # This would be the point to deflate anything found in $where
2179 # (and leave $attrs->{bind} intact). Problem is - inflators historically
2180 # expect a row object. And all we have is a resultsource (it is trivial
2181 # to extract deflator coderefs via $alias2source above).
2183 # I don't see a way forward other than changing the way deflators are
2184 # invoked, and that's just bad...
2187 return ('select', $ident, $select, $where, $attrs, @limit);
2190 # Returns a counting SELECT for a simple count
2191 # query. Abstracted so that a storage could override
2192 # this to { count => 'firstcol' } or whatever makes
2193 # sense as a performance optimization
2195 #my ($self, $source, $rs_attrs) = @_;
2196 return { count => '*' };
2199 sub source_bind_attributes {
2200 shift->throw_exception(
2201 'source_bind_attributes() was never meant to be a callable public method - '
2202 .'please contact the DBIC dev-team and describe your use case so that a reasonable '
2203 .'solution can be provided'
2204 ."\nhttp://search.cpan.org/dist/DBIx-Class/lib/DBIx/Class.pm#GETTING_HELP/SUPPORT"
2212 =item Arguments: $ident, $select, $condition, $attrs
2216 Handle a SQL select statement.
2222 my ($ident, $select, $condition, $attrs) = @_;
2223 return $self->cursor_class->new($self, \@_, $attrs);
2228 my ($rv, $sth, @bind) = $self->_select(@_);
2229 my @row = $sth->fetchrow_array;
2230 my @nextrow = $sth->fetchrow_array if @row;
2231 if(@row && @nextrow) {
2232 carp "Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single";
2234 # Need to call finish() to work round broken DBDs
2239 =head2 sql_limit_dialect
2241 This is an accessor for the default SQL limit dialect used by a particular
2242 storage driver. Can be overridden by supplying an explicit L</limit_dialect>
2243 to L<DBIx::Class::Schema/connect>. For a list of available limit dialects
2244 see L<DBIx::Class::SQLMaker::LimitDialects>.
2249 my ($self, $dbh, $sql) = @_;
2251 # 3 is the if_active parameter which avoids active sth re-use
2252 my $sth = $self->disable_sth_caching
2253 ? $dbh->prepare($sql)
2254 : $dbh->prepare_cached($sql, {}, 3);
2256 # XXX You would think RaiseError would make this impossible,
2257 # but apparently that's not true :(
2258 $self->throw_exception(
2261 sprintf( "\$dbh->prepare() of '%s' through %s failed *silently* without "
2262 .'an exception and/or setting $dbh->errstr',
2264 ? substr($sql, 0, 20) . '...'
2267 'DBD::' . $dbh->{Driver}{Name},
2275 carp_unique 'sth was mistakenly marked/documented as public, stop calling it (will be removed before DBIC v0.09)';
2280 my ($self, $sql) = @_;
2281 $self->dbh_do('_dbh_sth', $sql); # retry over disconnects
2284 sub _dbh_columns_info_for {
2285 my ($self, $dbh, $table) = @_;
2287 if ($dbh->can('column_info')) {
2291 my ($schema,$tab) = $table =~ /^(.+?)\.(.+)$/ ? ($1,$2) : (undef,$table);
2292 my $sth = $dbh->column_info( undef,$schema, $tab, '%' );
2294 while ( my $info = $sth->fetchrow_hashref() ){
2296 $column_info{data_type} = $info->{TYPE_NAME};
2297 $column_info{size} = $info->{COLUMN_SIZE};
2298 $column_info{is_nullable} = $info->{NULLABLE} ? 1 : 0;
2299 $column_info{default_value} = $info->{COLUMN_DEF};
2300 my $col_name = $info->{COLUMN_NAME};
2301 $col_name =~ s/^\"(.*)\"$/$1/;
2303 $result{$col_name} = \%column_info;
2308 return \%result if !$caught && scalar keys %result;
2312 my $sth = $dbh->prepare($self->sql_maker->select($table, undef, \'1 = 0'));
2314 my @columns = @{$sth->{NAME_lc}};
2315 for my $i ( 0 .. $#columns ){
2317 $column_info{data_type} = $sth->{TYPE}->[$i];
2318 $column_info{size} = $sth->{PRECISION}->[$i];
2319 $column_info{is_nullable} = $sth->{NULLABLE}->[$i] ? 1 : 0;
2321 if ($column_info{data_type} =~ m/^(.*?)\((.*?)\)$/) {
2322 $column_info{data_type} = $1;
2323 $column_info{size} = $2;
2326 $result{$columns[$i]} = \%column_info;
2330 foreach my $col (keys %result) {
2331 my $colinfo = $result{$col};
2332 my $type_num = $colinfo->{data_type};
2334 if(defined $type_num && $dbh->can('type_info')) {
2335 my $type_info = $dbh->type_info($type_num);
2336 $type_name = $type_info->{TYPE_NAME} if $type_info;
2337 $colinfo->{data_type} = $type_name if $type_name;
2344 sub columns_info_for {
2345 my ($self, $table) = @_;
2346 $self->_dbh_columns_info_for ($self->_get_dbh, $table);
2349 =head2 last_insert_id
2351 Return the row id of the last insert.
2355 sub _dbh_last_insert_id {
2356 my ($self, $dbh, $source, $col) = @_;
2358 my $id = try { $dbh->last_insert_id (undef, undef, $source->name, $col) };
2360 return $id if defined $id;
2362 my $class = ref $self;
2363 $self->throw_exception ("No storage specific _dbh_last_insert_id() method implemented in $class, and the generic DBI::last_insert_id() failed");
2366 sub last_insert_id {
2368 $self->_dbh_last_insert_id ($self->_dbh, @_);
2371 =head2 _native_data_type
2375 =item Arguments: $type_name
2379 This API is B<EXPERIMENTAL>, will almost definitely change in the future, and
2380 currently only used by L<::AutoCast|DBIx::Class::Storage::DBI::AutoCast> and
2381 L<::Sybase::ASE|DBIx::Class::Storage::DBI::Sybase::ASE>.
2383 The default implementation returns C<undef>, implement in your Storage driver if
2384 you need this functionality.
2386 Should map types from other databases to the native RDBMS type, for example
2387 C<VARCHAR2> to C<VARCHAR>.
2389 Types with modifiers should map to the underlying data type. For example,
2390 C<INTEGER AUTO_INCREMENT> should become C<INTEGER>.
2392 Composite types should map to the container type, for example
2393 C<ENUM(foo,bar,baz)> becomes C<ENUM>.
2397 sub _native_data_type {
2398 #my ($self, $data_type) = @_;
2402 # Check if placeholders are supported at all
2403 sub _determine_supports_placeholders {
2405 my $dbh = $self->_get_dbh;
2407 # some drivers provide a $dbh attribute (e.g. Sybase and $dbh->{syb_dynamic_supported})
2408 # but it is inaccurate more often than not
2410 local $dbh->{PrintError} = 0;
2411 local $dbh->{RaiseError} = 1;
2412 $dbh->do('select ?', {}, 1);
2420 # Check if placeholders bound to non-string types throw exceptions
2422 sub _determine_supports_typeless_placeholders {
2424 my $dbh = $self->_get_dbh;
2427 local $dbh->{PrintError} = 0;
2428 local $dbh->{RaiseError} = 1;
2429 # this specifically tests a bind that is NOT a string
2430 $dbh->do('select 1 where 1 = ?', {}, 1);
2440 Returns the database driver name.
2445 shift->_get_dbh->{Driver}->{Name};
2448 =head2 bind_attribute_by_data_type
2450 Given a datatype from column info, returns a database specific bind
2451 attribute for C<< $dbh->bind_param($val,$attribute) >> or nothing if we will
2452 let the database planner just handle it.
2454 Generally only needed for special case column types, like bytea in postgres.
2458 sub bind_attribute_by_data_type {
2462 =head2 is_datatype_numeric
2464 Given a datatype from column_info, returns a boolean value indicating if
2465 the current RDBMS considers it a numeric value. This controls how
2466 L<DBIx::Class::Row/set_column> decides whether to mark the column as
2467 dirty - when the datatype is deemed numeric a C<< != >> comparison will
2468 be performed instead of the usual C<eq>.
2472 sub is_datatype_numeric {
2473 #my ($self, $dt) = @_;
2475 return 0 unless $_[1];
2478 numeric | int(?:eger)? | (?:tiny|small|medium|big)int | dec(?:imal)? | real | float | double (?: \s+ precision)? | (?:big)?serial
2483 =head2 create_ddl_dir
2487 =item Arguments: $schema \@databases, $version, $directory, $preversion, \%sqlt_args
2491 Creates a SQL file based on the Schema, for each of the specified
2492 database engines in C<\@databases> in the given directory.
2493 (note: specify L<SQL::Translator> names, not L<DBI> driver names).
2495 Given a previous version number, this will also create a file containing
2496 the ALTER TABLE statements to transform the previous schema into the
2497 current one. Note that these statements may contain C<DROP TABLE> or
2498 C<DROP COLUMN> statements that can potentially destroy data.
2500 The file names are created using the C<ddl_filename> method below, please
2501 override this method in your schema if you would like a different file
2502 name format. For the ALTER file, the same format is used, replacing
2503 $version in the name with "$preversion-$version".
2505 See L<SQL::Translator/METHODS> for a list of values for C<\%sqlt_args>.
2506 The most common value for this would be C<< { add_drop_table => 1 } >>
2507 to have the SQL produced include a C<DROP TABLE> statement for each table
2508 created. For quoting purposes supply C<quote_table_names> and
2509 C<quote_field_names>.
2511 If no arguments are passed, then the following default values are assumed:
2515 =item databases - ['MySQL', 'SQLite', 'PostgreSQL']
2517 =item version - $schema->schema_version
2519 =item directory - './'
2521 =item preversion - <none>
2525 By default, C<\%sqlt_args> will have
2527 { add_drop_table => 1, ignore_constraint_names => 1, ignore_index_names => 1 }
2529 merged with the hash passed in. To disable any of those features, pass in a
2530 hashref like the following
2532 { ignore_constraint_names => 0, # ... other options }
2535 WARNING: You are strongly advised to check all SQL files created, before applying
2540 sub create_ddl_dir {
2541 my ($self, $schema, $databases, $version, $dir, $preversion, $sqltargs) = @_;
2544 carp "No directory given, using ./\n";
2549 (require File::Path and File::Path::make_path ("$dir")) # make_path does not like objects (i.e. Path::Class::Dir)
2551 $self->throw_exception(
2552 "Failed to create '$dir': " . ($! || $@ || 'error unknown')
2556 $self->throw_exception ("Directory '$dir' does not exist\n") unless(-d $dir);
2558 $databases ||= ['MySQL', 'SQLite', 'PostgreSQL'];
2559 $databases = [ $databases ] if(ref($databases) ne 'ARRAY');
2561 my $schema_version = $schema->schema_version || '1.x';
2562 $version ||= $schema_version;
2565 add_drop_table => 1,
2566 ignore_constraint_names => 1,
2567 ignore_index_names => 1,
2571 unless (DBIx::Class::Optional::Dependencies->req_ok_for ('deploy')) {
2572 $self->throw_exception("Can't create a ddl file without " . DBIx::Class::Optional::Dependencies->req_missing_for ('deploy') );
2575 my $sqlt = SQL::Translator->new( $sqltargs );
2577 $sqlt->parser('SQL::Translator::Parser::DBIx::Class');
2578 my $sqlt_schema = $sqlt->translate({ data => $schema })
2579 or $self->throw_exception ($sqlt->error);
2581 foreach my $db (@$databases) {
2583 $sqlt->{schema} = $sqlt_schema;
2584 $sqlt->producer($db);
2587 my $filename = $schema->ddl_filename($db, $version, $dir);
2588 if (-e $filename && ($version eq $schema_version )) {
2589 # if we are dumping the current version, overwrite the DDL
2590 carp "Overwriting existing DDL file - $filename";
2594 my $output = $sqlt->translate;
2596 carp("Failed to translate to $db, skipping. (" . $sqlt->error . ")");
2599 if(!open($file, ">$filename")) {
2600 $self->throw_exception("Can't open $filename for writing ($!)");
2603 print $file $output;
2606 next unless ($preversion);
2608 require SQL::Translator::Diff;
2610 my $prefilename = $schema->ddl_filename($db, $preversion, $dir);
2611 if(!-e $prefilename) {
2612 carp("No previous schema file found ($prefilename)");
2616 my $difffile = $schema->ddl_filename($db, $version, $dir, $preversion);
2618 carp("Overwriting existing diff file - $difffile");
2624 my $t = SQL::Translator->new($sqltargs);
2629 or $self->throw_exception ($t->error);
2631 my $out = $t->translate( $prefilename )
2632 or $self->throw_exception ($t->error);
2634 $source_schema = $t->schema;
2636 $source_schema->name( $prefilename )
2637 unless ( $source_schema->name );
2640 # The "new" style of producers have sane normalization and can support
2641 # diffing a SQL file against a DBIC->SQLT schema. Old style ones don't
2642 # And we have to diff parsed SQL against parsed SQL.
2643 my $dest_schema = $sqlt_schema;
2645 unless ( "SQL::Translator::Producer::$db"->can('preprocess_schema') ) {
2646 my $t = SQL::Translator->new($sqltargs);
2651 or $self->throw_exception ($t->error);
2653 my $out = $t->translate( $filename )
2654 or $self->throw_exception ($t->error);
2656 $dest_schema = $t->schema;
2658 $dest_schema->name( $filename )
2659 unless $dest_schema->name;
2662 my $diff = SQL::Translator::Diff::schema_diff($source_schema, $db,
2666 if(!open $file, ">$difffile") {
2667 $self->throw_exception("Can't write to $difffile ($!)");
2675 =head2 deployment_statements
2679 =item Arguments: $schema, $type, $version, $directory, $sqlt_args
2683 Returns the statements used by L</deploy> and L<DBIx::Class::Schema/deploy>.
2685 The L<SQL::Translator> (not L<DBI>) database driver name can be explicitly
2686 provided in C<$type>, otherwise the result of L</sqlt_type> is used as default.
2688 C<$directory> is used to return statements from files in a previously created
2689 L</create_ddl_dir> directory and is optional. The filenames are constructed
2690 from L<DBIx::Class::Schema/ddl_filename>, the schema name and the C<$version>.
2692 If no C<$directory> is specified then the statements are constructed on the
2693 fly using L<SQL::Translator> and C<$version> is ignored.
2695 See L<SQL::Translator/METHODS> for a list of values for C<$sqlt_args>.
2699 sub deployment_statements {
2700 my ($self, $schema, $type, $version, $dir, $sqltargs) = @_;
2701 $type ||= $self->sqlt_type;
2702 $version ||= $schema->schema_version || '1.x';
2704 my $filename = $schema->ddl_filename($type, $version, $dir);
2707 # FIXME replace this block when a proper sane sql parser is available
2709 open($file, "<$filename")
2710 or $self->throw_exception("Can't open $filename ($!)");
2713 return join('', @rows);
2716 unless (DBIx::Class::Optional::Dependencies->req_ok_for ('deploy') ) {
2717 $self->throw_exception("Can't deploy without a ddl_dir or " . DBIx::Class::Optional::Dependencies->req_missing_for ('deploy') );
2720 # sources needs to be a parser arg, but for simplicty allow at top level
2722 $sqltargs->{parser_args}{sources} = delete $sqltargs->{sources}
2723 if exists $sqltargs->{sources};
2725 my $tr = SQL::Translator->new(
2726 producer => "SQL::Translator::Producer::${type}",
2728 parser => 'SQL::Translator::Parser::DBIx::Class',
2734 @ret = $tr->translate;
2737 $ret[0] = $tr->translate;
2740 $self->throw_exception( 'Unable to produce deployment statements: ' . $tr->error)
2741 unless (@ret && defined $ret[0]);
2743 return wantarray ? @ret : $ret[0];
2746 # FIXME deploy() currently does not accurately report sql errors
2747 # Will always return true while errors are warned
2749 my ($self, $schema, $type, $sqltargs, $dir) = @_;
2753 return if($line =~ /^--/);
2754 # next if($line =~ /^DROP/m);
2755 return if($line =~ /^BEGIN TRANSACTION/m);
2756 return if($line =~ /^COMMIT/m);
2757 return if $line =~ /^\s+$/; # skip whitespace only
2758 $self->_query_start($line);
2760 # do a dbh_do cycle here, as we need some error checking in
2761 # place (even though we will ignore errors)
2762 $self->dbh_do (sub { $_[1]->do($line) });
2764 carp qq{$_ (running "${line}")};
2766 $self->_query_end($line);
2768 my @statements = $schema->deployment_statements($type, undef, $dir, { %{ $sqltargs || {} }, no_comments => 1 } );
2769 if (@statements > 1) {
2770 foreach my $statement (@statements) {
2771 $deploy->( $statement );
2774 elsif (@statements == 1) {
2775 # split on single line comments and end of statements
2776 foreach my $line ( split(/\s*--.*\n|;\n/, $statements[0])) {
2782 =head2 datetime_parser
2784 Returns the datetime parser class
2788 sub datetime_parser {
2790 return $self->{datetime_parser} ||= do {
2791 $self->build_datetime_parser(@_);
2795 =head2 datetime_parser_type
2797 Defines the datetime parser class - currently defaults to L<DateTime::Format::MySQL>
2799 =head2 build_datetime_parser
2801 See L</datetime_parser>
2805 sub build_datetime_parser {
2807 my $type = $self->datetime_parser_type(@_);
2812 =head2 is_replicating
2814 A boolean that reports if a particular L<DBIx::Class::Storage::DBI> is set to
2815 replicate from a master database. Default is undef, which is the result
2816 returned by databases that don't support replication.
2820 sub is_replicating {
2825 =head2 lag_behind_master
2827 Returns a number that represents a certain amount of lag behind a master db
2828 when a given storage is replicating. The number is database dependent, but
2829 starts at zero and increases with the amount of lag. Default in undef
2833 sub lag_behind_master {
2837 =head2 relname_to_table_alias
2841 =item Arguments: $relname, $join_count
2845 L<DBIx::Class> uses L<DBIx::Class::Relationship> names as table aliases in
2848 This hook is to allow specific L<DBIx::Class::Storage> drivers to change the
2849 way these aliases are named.
2851 The default behavior is C<< "$relname_$join_count" if $join_count > 1 >>,
2852 otherwise C<"$relname">.
2856 sub relname_to_table_alias {
2857 my ($self, $relname, $join_count) = @_;
2859 my $alias = ($join_count && $join_count > 1 ?
2860 join('_', $relname, $join_count) : $relname);
2865 # The size in bytes to use for DBI's ->bind_param_inout, this is the generic
2866 # version and it may be necessary to amend or override it for a specific storage
2867 # if such binds are necessary.
2868 sub _max_column_bytesize {
2869 my ($self, $attr) = @_;
2873 if ($attr->{sqlt_datatype}) {
2874 my $data_type = lc($attr->{sqlt_datatype});
2876 if ($attr->{sqlt_size}) {
2878 # String/sized-binary types
2879 if ($data_type =~ /^(?:
2880 l? (?:var)? char(?:acter)? (?:\s*varying)?
2882 (?:var)? binary (?:\s*varying)?
2887 $max_size = $attr->{sqlt_size};
2889 # Other charset/unicode types, assume scale of 4
2890 elsif ($data_type =~ /^(?:
2891 national \s* character (?:\s*varying)?
2900 $max_size = $attr->{sqlt_size} * 4;
2904 if (!$max_size and !$self->_is_lob_type($data_type)) {
2905 $max_size = 100 # for all other (numeric?) datatypes
2909 $max_size || $self->_dbic_connect_attributes->{LongReadLen} || $self->_get_dbh->{LongReadLen} || 8000;
2912 # Determine if a data_type is some type of BLOB
2914 my ($self, $data_type) = @_;
2915 $data_type && ($data_type =~ /lob|bfile|text|image|bytea|memo/i
2916 || $data_type =~ /^long(?:\s+(?:raw|bit\s*varying|varbit|binary
2917 |varchar|character\s*varying|nvarchar
2918 |national\s*character\s*varying))?\z/xi);
2921 sub _is_binary_lob_type {
2922 my ($self, $data_type) = @_;
2923 $data_type && ($data_type =~ /blob|bfile|image|bytea/i
2924 || $data_type =~ /^long(?:\s+(?:raw|bit\s*varying|varbit|binary))?\z/xi);
2927 sub _is_text_lob_type {
2928 my ($self, $data_type) = @_;
2929 $data_type && ($data_type =~ /^(?:clob|memo)\z/i
2930 || $data_type =~ /^long(?:\s+(?:varchar|character\s*varying|nvarchar
2931 |national\s*character\s*varying))\z/xi);
2938 =head2 DBIx::Class and AutoCommit
2940 DBIx::Class can do some wonderful magic with handling exceptions,
2941 disconnections, and transactions when you use C<< AutoCommit => 1 >>
2942 (the default) combined with L<txn_do|DBIx::Class::Storage/txn_do> for
2943 transaction support.
2945 If you set C<< AutoCommit => 0 >> in your connect info, then you are always
2946 in an assumed transaction between commits, and you're telling us you'd
2947 like to manage that manually. A lot of the magic protections offered by
2948 this module will go away. We can't protect you from exceptions due to database
2949 disconnects because we don't know anything about how to restart your
2950 transactions. You're on your own for handling all sorts of exceptional
2951 cases if you choose the C<< AutoCommit => 0 >> path, just as you would
2957 Matt S. Trout <mst@shadowcatsystems.co.uk>
2959 Andy Grundman <andy@hybridized.org>
2963 You may distribute this code under the same terms as Perl itself.