1 package DBIx::Class::Storage::DBI;
2 # -*- mode: cperl; cperl-indent-level: 2 -*-
4 use base 'DBIx::Class::Storage';
9 use SQL::Abstract::Limit;
10 use DBIx::Class::Storage::DBI::Cursor;
11 use DBIx::Class::Storage::Statistics;
14 __PACKAGE__->mk_group_accessors(
16 qw/_connect_info _dbh _sql_maker _sql_maker_opts _conn_pid _conn_tid
17 disable_sth_caching cursor on_connect_do transaction_depth/
22 package DBIC::SQL::Abstract; # Would merge upstream, but nate doesn't reply :(
24 use base qw/SQL::Abstract::Limit/;
26 # This prevents the caching of $dbh in S::A::L, I believe
28 my $self = shift->SUPER::new(@_);
30 # If limit_dialect is a ref (like a $dbh), go ahead and replace
31 # it with what it resolves to:
32 $self->{limit_dialect} = $self->_find_syntax($self->{limit_dialect})
33 if ref $self->{limit_dialect};
39 my ($self, $sql, $order, $rows, $offset ) = @_;
42 my $last = $rows + $offset;
43 my ( $order_by ) = $self->_order_by( $order );
48 SELECT Q1.*, ROW_NUMBER() OVER( ) AS ROW_NUM FROM (
53 WHERE ROW_NUM BETWEEN $offset AND $last
59 # While we're at it, this should make LIMIT queries more efficient,
60 # without digging into things too deeply
61 use Scalar::Util 'blessed';
63 my ($self, $syntax) = @_;
64 my $dbhname = blessed($syntax) ? $syntax->{Driver}{Name} : $syntax;
65 # print STDERR "Found DBH $syntax >$dbhname< ", $syntax->{Driver}->{Name}, "\n";
66 if(ref($self) && $dbhname && $dbhname eq 'DB2') {
67 return 'RowNumberOver';
70 $self->{_cached_syntax} ||= $self->SUPER::_find_syntax($syntax);
74 my ($self, $table, $fields, $where, $order, @rest) = @_;
75 $table = $self->_quote($table) unless ref($table);
76 local $self->{rownum_hack_count} = 1
77 if (defined $rest[0] && $self->{limit_dialect} eq 'RowNum');
78 @rest = (-1) unless defined $rest[0];
79 die "LIMIT 0 Does Not Compute" if $rest[0] == 0;
80 # and anyway, SQL::Abstract::Limit will cause a barf if we don't first
81 local $self->{having_bind} = [];
82 my ($sql, @ret) = $self->SUPER::select(
83 $table, $self->_recurse_fields($fields), $where, $order, @rest
85 return wantarray ? ($sql, @ret, @{$self->{having_bind}}) : $sql;
91 $table = $self->_quote($table) unless ref($table);
92 $self->SUPER::insert($table, @_);
98 $table = $self->_quote($table) unless ref($table);
99 $self->SUPER::update($table, @_);
105 $table = $self->_quote($table) unless ref($table);
106 $self->SUPER::delete($table, @_);
112 return $_[1].$self->_order_by($_[2]);
114 return $self->SUPER::_emulate_limit(@_);
118 sub _recurse_fields {
119 my ($self, $fields) = @_;
120 my $ref = ref $fields;
121 return $self->_quote($fields) unless $ref;
122 return $$fields if $ref eq 'SCALAR';
124 if ($ref eq 'ARRAY') {
125 return join(', ', map {
126 $self->_recurse_fields($_)
127 .(exists $self->{rownum_hack_count}
128 ? ' AS col'.$self->{rownum_hack_count}++
131 } elsif ($ref eq 'HASH') {
132 foreach my $func (keys %$fields) {
133 return $self->_sqlcase($func)
134 .'( '.$self->_recurse_fields($fields->{$func}).' )';
143 if (ref $_[0] eq 'HASH') {
144 if (defined $_[0]->{group_by}) {
145 $ret = $self->_sqlcase(' group by ')
146 .$self->_recurse_fields($_[0]->{group_by});
148 if (defined $_[0]->{having}) {
150 ($frag, @extra) = $self->_recurse_where($_[0]->{having});
151 push(@{$self->{having_bind}}, @extra);
152 $ret .= $self->_sqlcase(' having ').$frag;
154 if (defined $_[0]->{order_by}) {
155 $ret .= $self->_order_by($_[0]->{order_by});
157 } elsif (ref $_[0] eq 'SCALAR') {
158 $ret = $self->_sqlcase(' order by ').${ $_[0] };
159 } elsif (ref $_[0] eq 'ARRAY' && @{$_[0]}) {
160 my @order = @{+shift};
161 $ret = $self->_sqlcase(' order by ')
163 my $r = $self->_order_by($_, @_);
164 $r =~ s/^ ?ORDER BY //i;
168 $ret = $self->SUPER::_order_by(@_);
173 sub _order_directions {
174 my ($self, $order) = @_;
175 $order = $order->{order_by} if ref $order eq 'HASH';
176 return $self->SUPER::_order_directions($order);
180 my ($self, $from) = @_;
181 if (ref $from eq 'ARRAY') {
182 return $self->_recurse_from(@$from);
183 } elsif (ref $from eq 'HASH') {
184 return $self->_make_as($from);
186 return $from; # would love to quote here but _table ends up getting called
187 # twice during an ->select without a limit clause due to
188 # the way S::A::Limit->select works. should maybe consider
189 # bypassing this and doing S::A::select($self, ...) in
190 # our select method above. meantime, quoting shims have
191 # been added to select/insert/update/delete here
196 my ($self, $from, @join) = @_;
198 push(@sqlf, $self->_make_as($from));
199 foreach my $j (@join) {
202 # check whether a join type exists
203 my $join_clause = '';
204 my $to_jt = ref($to) eq 'ARRAY' ? $to->[0] : $to;
205 if (ref($to_jt) eq 'HASH' and exists($to_jt->{-join_type})) {
206 $join_clause = ' '.uc($to_jt->{-join_type}).' JOIN ';
208 $join_clause = ' JOIN ';
210 push(@sqlf, $join_clause);
212 if (ref $to eq 'ARRAY') {
213 push(@sqlf, '(', $self->_recurse_from(@$to), ')');
215 push(@sqlf, $self->_make_as($to));
217 push(@sqlf, ' ON ', $self->_join_condition($on));
219 return join('', @sqlf);
223 my ($self, $from) = @_;
224 return join(' ', map { (ref $_ eq 'SCALAR' ? $$_ : $self->_quote($_)) }
225 reverse each %{$self->_skip_options($from)});
229 my ($self, $hash) = @_;
231 $clean_hash->{$_} = $hash->{$_}
232 for grep {!/^-/} keys %$hash;
236 sub _join_condition {
237 my ($self, $cond) = @_;
238 if (ref $cond eq 'HASH') {
241 my $x = '= '.$self->_quote($cond->{$_}); $j{$_} = \$x;
243 return $self->_recurse_where(\%j);
244 } elsif (ref $cond eq 'ARRAY') {
245 return join(' OR ', map { $self->_join_condition($_) } @$cond);
247 die "Can't handle this yet!";
252 my ($self, $label) = @_;
253 return '' unless defined $label;
254 return "*" if $label eq '*';
255 return $label unless $self->{quote_char};
256 if(ref $self->{quote_char} eq "ARRAY"){
257 return $self->{quote_char}->[0] . $label . $self->{quote_char}->[1]
258 if !defined $self->{name_sep};
259 my $sep = $self->{name_sep};
260 return join($self->{name_sep},
261 map { $self->{quote_char}->[0] . $_ . $self->{quote_char}->[1] }
262 split(/\Q$sep\E/,$label));
264 return $self->SUPER::_quote($label);
269 $self->{limit_dialect} = shift if @_;
270 return $self->{limit_dialect};
275 $self->{quote_char} = shift if @_;
276 return $self->{quote_char};
281 $self->{name_sep} = shift if @_;
282 return $self->{name_sep};
285 } # End of BEGIN block
289 DBIx::Class::Storage::DBI - DBI storage handler
295 This class represents the connection to an RDBMS via L<DBI>. See
296 L<DBIx::Class::Storage> for general information. This pod only
297 documents DBI-specific methods and behaviors.
304 my $new = shift->next::method(@_);
306 $new->cursor("DBIx::Class::Storage::DBI::Cursor");
307 $new->transaction_depth(0);
308 $new->_sql_maker_opts({});
309 $new->{_in_dbh_do} = 0;
310 $new->{_dbh_gen} = 0;
317 The arguments of C<connect_info> are always a single array reference.
319 This is normally accessed via L<DBIx::Class::Schema/connection>, which
320 encapsulates its argument list in an arrayref before calling
321 C<connect_info> here.
323 The arrayref can either contain the same set of arguments one would
324 normally pass to L<DBI/connect>, or a lone code reference which returns
325 a connected database handle.
327 In either case, if the final argument in your connect_info happens
328 to be a hashref, C<connect_info> will look there for several
329 connection-specific options:
335 This can be set to an arrayref of literal sql statements, which will
336 be executed immediately after making the connection to the database
337 every time we [re-]connect.
339 =item disable_sth_caching
341 If set to a true value, this option will disable the caching of
342 statement handles via L<DBI/prepare_cached>.
346 Sets the limit dialect. This is useful for JDBC-bridge among others
347 where the remote SQL-dialect cannot be determined by the name of the
352 Specifies what characters to use to quote table and column names. If
353 you use this you will want to specify L<name_sep> as well.
355 quote_char expects either a single character, in which case is it is placed
356 on either side of the table/column, or an arrayref of length 2 in which case the
357 table/column name is placed between the elements.
359 For example under MySQL you'd use C<quote_char =E<gt> '`'>, and user SQL Server you'd
360 use C<quote_char =E<gt> [qw/[ ]/]>.
364 This only needs to be used in conjunction with L<quote_char>, and is used to
365 specify the charecter that seperates elements (schemas, tables, columns) from
366 each other. In most cases this is simply a C<.>.
370 These options can be mixed in with your other L<DBI> connection attributes,
371 or placed in a seperate hashref after all other normal L<DBI> connection
374 Every time C<connect_info> is invoked, any previous settings for
375 these options will be cleared before setting the new ones, regardless of
376 whether any options are specified in the new C<connect_info>.
378 Important note: DBIC expects the returned database handle provided by
379 a subref argument to have RaiseError set on it. If it doesn't, things
380 might not work very well, YMMV. If you don't use a subref, DBIC will
381 force this setting for you anyways. Setting HandleError to anything
382 other than simple exception object wrapper might cause problems too.
386 # Simple SQLite connection
387 ->connect_info([ 'dbi:SQLite:./foo.db' ]);
390 ->connect_info([ sub { DBI->connect(...) } ]);
392 # A bit more complicated
399 { quote_char => q{"}, name_sep => q{.} },
403 # Equivalent to the previous example
409 { AutoCommit => 0, quote_char => q{"}, name_sep => q{.} },
413 # Subref + DBIC-specific connection options
416 sub { DBI->connect(...) },
420 on_connect_do => ['SET search_path TO myschema,otherschema,public'],
421 disable_sth_caching => 1,
429 my ($self, $info_arg) = @_;
431 return $self->_connect_info if !$info_arg;
433 # Kill sql_maker/_sql_maker_opts, so we get a fresh one with only
434 # the new set of options
435 $self->_sql_maker(undef);
436 $self->_sql_maker_opts({});
438 my $info = [ @$info_arg ]; # copy because we can alter it
439 my $last_info = $info->[-1];
440 if(ref $last_info eq 'HASH') {
441 for my $storage_opt (qw/on_connect_do disable_sth_caching/) {
442 if(my $value = delete $last_info->{$storage_opt}) {
443 $self->$storage_opt($value);
446 for my $sql_maker_opt (qw/limit_dialect quote_char name_sep/) {
447 if(my $opt_val = delete $last_info->{$sql_maker_opt}) {
448 $self->_sql_maker_opts->{$sql_maker_opt} = $opt_val;
452 # Get rid of any trailing empty hashref
453 pop(@$info) if !keys %$last_info;
456 $self->_connect_info($info);
461 This method is deprecated in favor of setting via L</connect_info>.
465 Arguments: $subref, @extra_coderef_args?
467 Execute the given subref using the new exception-based connection management.
469 The first two arguments will be the storage object that C<dbh_do> was called
470 on and a database handle to use. Any additional arguments will be passed
471 verbatim to the called subref as arguments 2 and onwards.
473 Using this (instead of $self->_dbh or $self->dbh) ensures correct
474 exception handling and reconnection (or failover in future subclasses).
476 Your subref should have no side-effects outside of the database, as
477 there is the potential for your subref to be partially double-executed
478 if the database connection was stale/dysfunctional.
482 my @stuff = $schema->storage->dbh_do(
484 my ($storage, $dbh, @cols) = @_;
485 my $cols = join(q{, }, @cols);
486 $dbh->selectrow_array("SELECT $cols FROM foo");
497 ref $coderef eq 'CODE' or $self->throw_exception
498 ('$coderef must be a CODE reference');
500 return $coderef->($self, $self->_dbh, @_) if $self->{_in_dbh_do};
501 local $self->{_in_dbh_do} = 1;
504 my $want_array = wantarray;
507 $self->_verify_pid if $self->_dbh;
508 $self->_populate_dbh if !$self->_dbh;
510 @result = $coderef->($self, $self->_dbh, @_);
512 elsif(defined $want_array) {
513 $result[0] = $coderef->($self, $self->_dbh, @_);
516 $coderef->($self, $self->_dbh, @_);
521 if(!$exception) { return $want_array ? @result : $result[0] }
523 $self->throw_exception($exception) if $self->connected;
525 # We were not connected - reconnect and retry, but let any
526 # exception fall right through this time
527 $self->_populate_dbh;
528 $coderef->($self, $self->_dbh, @_);
531 # This is basically a blend of dbh_do above and DBIx::Class::Storage::txn_do.
532 # It also informs dbh_do to bypass itself while under the direction of txn_do,
533 # via $self->{_in_dbh_do} (this saves some redundant eval and errorcheck, etc)
538 ref $coderef eq 'CODE' or $self->throw_exception
539 ('$coderef must be a CODE reference');
541 local $self->{_in_dbh_do} = 1;
544 my $want_array = wantarray;
549 $self->_verify_pid if $self->_dbh;
550 $self->_populate_dbh if !$self->_dbh;
554 @result = $coderef->(@_);
556 elsif(defined $want_array) {
557 $result[0] = $coderef->(@_);
566 if(!$exception) { return $want_array ? @result : $result[0] }
568 if($tried++ > 0 || $self->connected) {
569 eval { $self->txn_rollback };
570 my $rollback_exception = $@;
571 if($rollback_exception) {
572 my $exception_class = "DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION";
573 $self->throw_exception($exception) # propagate nested rollback
574 if $rollback_exception =~ /$exception_class/;
576 $self->throw_exception(
577 "Transaction aborted: ${exception}. "
578 . "Rollback failed: ${rollback_exception}"
581 $self->throw_exception($exception)
584 # We were not connected, and was first try - reconnect and retry
586 $self->_populate_dbh;
592 Our C<disconnect> method also performs a rollback first if the
593 database is not in C<AutoCommit> mode.
600 if( $self->connected ) {
601 $self->_dbh->rollback unless $self->_dbh->{AutoCommit};
602 $self->_dbh->disconnect;
611 if(my $dbh = $self->_dbh) {
612 if(defined $self->_conn_tid && $self->_conn_tid != threads->tid) {
620 return ($dbh->FETCH('Active') && $dbh->ping);
626 # handle pid changes correctly
627 # NOTE: assumes $self->_dbh is a valid $dbh
631 return if $self->_conn_pid == $$;
633 $self->_dbh->{InactiveDestroy} = 1;
640 sub ensure_connected {
643 unless ($self->connected) {
644 $self->_populate_dbh;
650 Returns the dbh - a data base handle of class L<DBI>.
657 $self->ensure_connected;
661 sub _sql_maker_args {
664 return ( bindtype=>'columns', limit_dialect => $self->dbh, %{$self->_sql_maker_opts} );
669 unless ($self->_sql_maker) {
670 $self->_sql_maker(new DBIC::SQL::Abstract( $self->_sql_maker_args ));
672 return $self->_sql_maker;
677 my @info = @{$self->_connect_info || []};
678 $self->_dbh($self->_connect(@info));
680 if(ref $self eq 'DBIx::Class::Storage::DBI') {
681 my $driver = $self->_dbh->{Driver}->{Name};
682 if ($self->load_optional_class("DBIx::Class::Storage::DBI::${driver}")) {
683 bless $self, "DBIx::Class::Storage::DBI::${driver}";
684 $self->_rebless() if $self->can('_rebless');
688 # if on-connect sql statements are given execute them
689 foreach my $sql_statement (@{$self->on_connect_do || []}) {
690 $self->debugobj->query_start($sql_statement) if $self->debug();
691 $self->_dbh->do($sql_statement);
692 $self->debugobj->query_end($sql_statement) if $self->debug();
695 $self->_conn_pid($$);
696 $self->_conn_tid(threads->tid) if $INC{'threads.pm'};
700 my ($self, @info) = @_;
702 $self->throw_exception("You failed to provide any connection info")
705 my ($old_connect_via, $dbh);
707 if ($INC{'Apache/DBI.pm'} && $ENV{MOD_PERL}) {
708 $old_connect_via = $DBI::connect_via;
709 $DBI::connect_via = 'connect';
713 if(ref $info[0] eq 'CODE') {
717 $dbh = DBI->connect(@info);
718 $dbh->{RaiseError} = 1;
719 $dbh->{PrintError} = 0;
720 $dbh->{PrintWarn} = 0;
724 $DBI::connect_via = $old_connect_via if $old_connect_via;
727 $self->throw_exception("DBI Connection failed: " . ($@ || $DBI::errstr));
734 my ($self, $dbh) = @_;
735 if ($dbh->{AutoCommit}) {
736 $self->debugobj->txn_begin()
744 $self->dbh_do($self->can('_dbh_txn_begin'))
745 if $self->{transaction_depth}++ == 0;
748 sub _dbh_txn_commit {
749 my ($self, $dbh) = @_;
750 if ($self->{transaction_depth} == 0) {
751 unless ($dbh->{AutoCommit}) {
752 $self->debugobj->txn_commit()
758 if (--$self->{transaction_depth} == 0) {
759 $self->debugobj->txn_commit()
768 $self->dbh_do($self->can('_dbh_txn_commit'));
771 sub _dbh_txn_rollback {
772 my ($self, $dbh) = @_;
773 if ($self->{transaction_depth} == 0) {
774 unless ($dbh->{AutoCommit}) {
775 $self->debugobj->txn_rollback()
781 if (--$self->{transaction_depth} == 0) {
782 $self->debugobj->txn_rollback()
787 die DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION->new;
795 eval { $self->dbh_do($self->can('_dbh_txn_rollback')) };
798 my $exception_class = "DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION";
799 $error =~ /$exception_class/ and $self->throw_exception($error);
800 $self->{transaction_depth} = 0; # ensure that a failed rollback
801 $self->throw_exception($error); # resets the transaction depth
805 # This used to be the top-half of _execute. It was split out to make it
806 # easier to override in NoBindVars without duping the rest. It takes up
807 # all of _execute's args, and emits $sql, @bind.
808 sub _prep_for_execute {
809 my ($self, $op, $extra_bind, $ident, @args) = @_;
811 my ($sql, @bind) = $self->sql_maker->$op($ident, @args);
812 unshift(@bind, @$extra_bind) if $extra_bind;
813 @bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args
815 return ($sql, @bind);
819 my ($self, $op, $extra_bind, $ident, $bind_attributes, @args) = @_;
821 my ($sql, @bind) = $self->sql_maker->$op($ident, @args);
822 unshift(@bind, @$extra_bind) if $extra_bind;
824 my @debug_bind = map { defined ($_ && $_->[1]) ? qq{'$_->[1]'} : q{'NULL'} } @bind;
825 $self->debugobj->query_start($sql, @debug_bind);
827 my $sth = eval { $self->sth($sql,$op) };
830 $self->throw_exception(
831 'no sth generated via sql (' . ($@ || $self->_dbh->errstr) . "): $sql"
841 my $placeholder_index = 1;
843 foreach my $bound (@bind) {
846 my($column_name, $data) = @$bound;
848 if( $bind_attributes ) {
849 $attributes = $bind_attributes->{$column_name}
850 if defined $bind_attributes->{$column_name};
853 $data = ref $data ? ''.$data : $data; # stringify args
855 $sth->bind_param($placeholder_index, $data, $attributes);
856 $placeholder_index++;
862 $self->throw_exception("Error executing '$sql': ".($@ || $sth->errstr));
865 $self->throw_exception("'$sql' did not generate a statement.");
868 my @debug_bind = map { defined ($_ && $_->[1]) ? qq{'$_->[1]'} : q{'NULL'} } @bind;
869 $self->debugobj->query_end($sql, @debug_bind);
871 return (wantarray ? ($rv, $sth, @bind) : $rv);
875 my ($self, $source, $to_insert) = @_;
877 my $ident = $source->from;
879 foreach my $column ($source->columns) {
881 $bind_attributes->{$column} = $source->column_info($column)->{bind_attributes}
882 if defined $source->column_info($column)->{bind_attributes};
885 $self->throw_exception(
886 "Couldn't insert ".join(', ',
887 map "$_ => $to_insert->{$_}", keys %$to_insert
889 ) unless ($self->_execute('insert' => [], $ident, $bind_attributes, $to_insert));
893 ## Still not quite perfect, and EXPERIMENTAL
894 ## Currently it is assumed that all values passed will be "normal", i.e. not
895 ## scalar refs, or at least, all the same type as the first set, the statement is
896 ## only prepped once.
898 my ($self, $table, $cols, $data) = @_;
900 @colvalues{@$cols} = (0..$#$cols);
901 my ($sql, @bind) = $self->sql_maker->insert($table, \%colvalues);
903 ##need this to support using bindtype=>columns for sql abstract
904 @bind = map {$_->[1]} @bind;
907 my @debug_bind = map { defined $_ ? qq{'$_'} : q{'NULL'} } @bind;
908 $self->debugobj->query_start($sql, @debug_bind);
910 my $sth = $self->sth($sql);
912 # @bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args
915 ## This must be an arrayref, else nothing works!
916 my $tuple_status = [];
918 # print STDERR Dumper($data);
921 $rv = eval { $sth->execute_array({ ArrayTupleFetch => sub { my $values = shift @$data; return if !$values; return [ @{$values}[@bind] ]},
922 ArrayTupleStatus => $tuple_status }) };
923 # print STDERR Dumper($tuple_status);
924 # print STDERR "RV: $rv\n";
925 if ($@ || !defined $rv) {
927 foreach my $tuple (@$tuple_status)
929 $errors .= "\n" . $tuple->[1] if(ref $tuple);
931 $self->throw_exception("Error executing '$sql': ".($@ || $errors));
934 $self->throw_exception("'$sql' did not generate a statement.");
937 my @debug_bind = map { defined $_ ? qq{`$_'} : q{`NULL'} } @bind;
938 $self->debugobj->query_end($sql, @debug_bind);
940 return (wantarray ? ($rv, $sth, @bind) : $rv);
945 my $source = shift @_;
948 foreach my $column ($source->columns) {
950 $bind_attributes->{$column} = $source->column_info($column)->{bind_attributes}
951 if defined $source->column_info($column)->{bind_attributes};
954 my $ident = $source->from;
955 return $self->_execute('update' => [], $ident, $bind_attributes, @_);
961 my $source = shift @_;
963 my $bind_attrs = {}; ## If ever it's needed...
964 my $ident = $source->from;
966 return $self->_execute('delete' => [], $ident, $bind_attrs, @_);
970 my ($self, $ident, $select, $condition, $attrs) = @_;
971 my $order = $attrs->{order_by};
972 if (ref $condition eq 'SCALAR') {
973 $order = $1 if $$condition =~ s/ORDER BY (.*)$//i;
975 if (exists $attrs->{group_by} || $attrs->{having}) {
977 group_by => $attrs->{group_by},
978 having => $attrs->{having},
979 ($order ? (order_by => $order) : ())
982 my $bind_attrs = {}; ## Future support
983 my @args = ('select', $attrs->{bind}, $ident, $bind_attrs, $select, $condition, $order);
984 if ($attrs->{software_limit} ||
985 $self->sql_maker->_default_limit_syntax eq "GenericSubQ") {
986 $attrs->{software_limit} = 1;
988 $self->throw_exception("rows attribute must be positive if present")
989 if (defined($attrs->{rows}) && !($attrs->{rows} > 0));
990 push @args, $attrs->{rows}, $attrs->{offset};
992 return $self->_execute(@args);
999 =item Arguments: $ident, $select, $condition, $attrs
1003 Handle a SQL select statement.
1009 my ($ident, $select, $condition, $attrs) = @_;
1010 return $self->cursor->new($self, \@_, $attrs);
1015 my ($rv, $sth, @bind) = $self->_select(@_);
1016 my @row = $sth->fetchrow_array;
1017 # Need to call finish() to work round broken DBDs
1026 =item Arguments: $sql
1030 Returns a L<DBI> sth (statement handle) for the supplied SQL.
1035 my ($self, $dbh, $sql) = @_;
1037 # 3 is the if_active parameter which avoids active sth re-use
1038 my $sth = $self->disable_sth_caching
1039 ? $dbh->prepare($sql)
1040 : $dbh->prepare_cached($sql, {}, 3);
1042 $self->throw_exception(
1043 'no sth generated via sql (' . ($@ || $dbh->errstr) . "): $sql"
1050 my ($self, $sql) = @_;
1051 $self->dbh_do($self->can('_dbh_sth'), $sql);
1054 sub _dbh_columns_info_for {
1055 my ($self, $dbh, $table) = @_;
1057 if ($dbh->can('column_info')) {
1060 my ($schema,$tab) = $table =~ /^(.+?)\.(.+)$/ ? ($1,$2) : (undef,$table);
1061 my $sth = $dbh->column_info( undef,$schema, $tab, '%' );
1063 while ( my $info = $sth->fetchrow_hashref() ){
1065 $column_info{data_type} = $info->{TYPE_NAME};
1066 $column_info{size} = $info->{COLUMN_SIZE};
1067 $column_info{is_nullable} = $info->{NULLABLE} ? 1 : 0;
1068 $column_info{default_value} = $info->{COLUMN_DEF};
1069 my $col_name = $info->{COLUMN_NAME};
1070 $col_name =~ s/^\"(.*)\"$/$1/;
1072 $result{$col_name} = \%column_info;
1075 return \%result if !$@ && scalar keys %result;
1079 my $sth = $dbh->prepare("SELECT * FROM $table WHERE 1=0");
1081 my @columns = @{$sth->{NAME_lc}};
1082 for my $i ( 0 .. $#columns ){
1084 my $type_num = $sth->{TYPE}->[$i];
1086 if(defined $type_num && $dbh->can('type_info')) {
1087 my $type_info = $dbh->type_info($type_num);
1088 $type_name = $type_info->{TYPE_NAME} if $type_info;
1090 $column_info{data_type} = $type_name ? $type_name : $type_num;
1091 $column_info{size} = $sth->{PRECISION}->[$i];
1092 $column_info{is_nullable} = $sth->{NULLABLE}->[$i] ? 1 : 0;
1094 if ($column_info{data_type} =~ m/^(.*?)\((.*?)\)$/) {
1095 $column_info{data_type} = $1;
1096 $column_info{size} = $2;
1099 $result{$columns[$i]} = \%column_info;
1105 sub columns_info_for {
1106 my ($self, $table) = @_;
1107 $self->dbh_do($self->can('_dbh_columns_info_for'), $table);
1110 =head2 last_insert_id
1112 Return the row id of the last insert.
1116 sub _dbh_last_insert_id {
1117 my ($self, $dbh, $source, $col) = @_;
1118 # XXX This is a SQLite-ism as a default... is there a DBI-generic way?
1119 $dbh->func('last_insert_rowid');
1122 sub last_insert_id {
1124 $self->dbh_do($self->can('_dbh_last_insert_id'), @_);
1129 Returns the database driver name.
1133 sub sqlt_type { shift->dbh->{Driver}->{Name} }
1135 =head2 create_ddl_dir (EXPERIMENTAL)
1139 =item Arguments: $schema \@databases, $version, $directory, $sqlt_args
1143 Creates a SQL file based on the Schema, for each of the specified
1144 database types, in the given directory.
1146 Note that this feature is currently EXPERIMENTAL and may not work correctly
1147 across all databases, or fully handle complex relationships.
1153 my ($self, $schema, $databases, $version, $dir, $sqltargs) = @_;
1155 if(!$dir || !-d $dir)
1157 warn "No directory given, using ./\n";
1160 $databases ||= ['MySQL', 'SQLite', 'PostgreSQL'];
1161 $databases = [ $databases ] if(ref($databases) ne 'ARRAY');
1162 $version ||= $schema->VERSION || '1.x';
1163 $sqltargs = { ( add_drop_table => 1 ), %{$sqltargs || {}} };
1165 eval "use SQL::Translator";
1166 $self->throw_exception("Can't deploy without SQL::Translator: $@") if $@;
1168 my $sqlt = SQL::Translator->new($sqltargs);
1169 foreach my $db (@$databases)
1172 $sqlt->parser('SQL::Translator::Parser::DBIx::Class');
1173 # $sqlt->parser_args({'DBIx::Class' => $schema);
1174 $sqlt->data($schema);
1175 $sqlt->producer($db);
1178 my $filename = $schema->ddl_filename($db, $dir, $version);
1181 $self->throw_exception("$filename already exists, skipping $db");
1184 open($file, ">$filename")
1185 or $self->throw_exception("Can't open $filename for writing ($!)");
1186 my $output = $sqlt->translate;
1188 # print join(":", keys %{$schema->source_registrations});
1189 # print Dumper($sqlt->schema);
1192 $self->throw_exception("Failed to translate to $db. (" . $sqlt->error . ")");
1195 print $file $output;
1201 =head2 deployment_statements
1205 =item Arguments: $schema, $type, $version, $directory, $sqlt_args
1209 Returns the statements used by L</deploy> and L<DBIx::Class::Schema/deploy>.
1210 The database driver name is given by C<$type>, though the value from
1211 L</sqlt_type> is used if it is not specified.
1213 C<$directory> is used to return statements from files in a previously created
1214 L</create_ddl_dir> directory and is optional. The filenames are constructed
1215 from L<DBIx::Class::Schema/ddl_filename>, the schema name and the C<$version>.
1217 If no C<$directory> is specified then the statements are constructed on the
1218 fly using L<SQL::Translator> and C<$version> is ignored.
1220 See L<SQL::Translator/METHODS> for a list of values for C<$sqlt_args>.
1224 sub deployment_statements {
1225 my ($self, $schema, $type, $version, $dir, $sqltargs) = @_;
1226 # Need to be connected to get the correct sqlt_type
1227 $self->ensure_connected() unless $type;
1228 $type ||= $self->sqlt_type;
1229 $version ||= $schema->VERSION || '1.x';
1231 eval "use SQL::Translator";
1234 eval "use SQL::Translator::Parser::DBIx::Class;";
1235 $self->throw_exception($@) if $@;
1236 eval "use SQL::Translator::Producer::${type};";
1237 $self->throw_exception($@) if $@;
1238 my $tr = SQL::Translator->new(%$sqltargs);
1239 SQL::Translator::Parser::DBIx::Class::parse( $tr, $schema );
1240 return "SQL::Translator::Producer::${type}"->can('produce')->($tr);
1243 my $filename = $schema->ddl_filename($type, $dir, $version);
1246 # $schema->create_ddl_dir([ $type ], $version, $dir, $sqltargs);
1247 $self->throw_exception("No SQL::Translator, and no Schema file found, aborting deploy");
1251 open($file, "<$filename")
1252 or $self->throw_exception("Can't open $filename ($!)");
1256 return join('', @rows);
1261 my ($self, $schema, $type, $sqltargs, $dir) = @_;
1262 foreach my $statement ( $self->deployment_statements($schema, $type, undef, $dir, { no_comments => 1, %{ $sqltargs || {} } } ) ) {
1263 for ( split(";\n", $statement)) {
1264 next if($_ =~ /^--/);
1266 # next if($_ =~ /^DROP/m);
1267 next if($_ =~ /^BEGIN TRANSACTION/m);
1268 next if($_ =~ /^COMMIT/m);
1269 next if $_ =~ /^\s+$/; # skip whitespace only
1270 $self->debugobj->query_start($_) if $self->debug;
1271 $self->dbh->do($_) or warn "SQL was:\n $_"; # XXX exceptions?
1272 $self->debugobj->query_end($_) if $self->debug;
1277 =head2 datetime_parser
1279 Returns the datetime parser class
1283 sub datetime_parser {
1285 return $self->{datetime_parser} ||= $self->build_datetime_parser(@_);
1288 =head2 datetime_parser_type
1290 Defines (returns) the datetime parser class - currently hardwired to
1291 L<DateTime::Format::MySQL>
1295 sub datetime_parser_type { "DateTime::Format::MySQL"; }
1297 =head2 build_datetime_parser
1299 See L</datetime_parser>
1303 sub build_datetime_parser {
1305 my $type = $self->datetime_parser_type(@_);
1307 $self->throw_exception("Couldn't load ${type}: $@") if $@;
1313 return if !$self->_dbh;
1322 The module defines a set of methods within the DBIC::SQL::Abstract
1323 namespace. These build on L<SQL::Abstract::Limit> to provide the
1324 SQL query functions.
1326 The following methods are extended:-
1340 See L</connect_info> for details.
1341 For setting, this method is deprecated in favor of L</connect_info>.
1345 See L</connect_info> for details.
1346 For setting, this method is deprecated in favor of L</connect_info>.
1350 See L</connect_info> for details.
1351 For setting, this method is deprecated in favor of L</connect_info>.
1357 Matt S. Trout <mst@shadowcatsystems.co.uk>
1359 Andy Grundman <andy@hybridized.org>
1363 You may distribute this code under the same terms as Perl itself.