X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI.pm;h=20948f30c421d5b41ef45c51a82f00e282a6da7a;hb=942cd0c142a828426a2ba3650991188c7c02178c;hp=2b4b68b2b7b5ca8bcf11e5dc8bcdcc35a560986a;hpb=2fd24e78f75a3bdb2f60f44dda7199387c69c6a5;p=dbsrgits%2FDBIx-Class.git diff --git a/lib/DBIx/Class/Storage/DBI.pm b/lib/DBIx/Class/Storage/DBI.pm index 2b4b68b..20948f3 100644 --- a/lib/DBIx/Class/Storage/DBI.pm +++ b/lib/DBIx/Class/Storage/DBI.pm @@ -3,23 +3,77 @@ package DBIx::Class::Storage::DBI; use base 'DBIx::Class::Storage'; -use strict; +use strict; use warnings; use DBI; use SQL::Abstract::Limit; use DBIx::Class::Storage::DBI::Cursor; use DBIx::Class::Storage::Statistics; -use IO::File; -use Carp::Clan qw/DBIx::Class/; +use Scalar::Util qw/blessed weaken/; + +__PACKAGE__->mk_group_accessors('simple' => + qw/_connect_info _dbi_connect_info _dbh _sql_maker _sql_maker_opts + _conn_pid _conn_tid disable_sth_caching cursor on_connect_do + transaction_depth unsafe/ +); + BEGIN { package DBIC::SQL::Abstract; # Would merge upstream, but nate doesn't reply :( use base qw/SQL::Abstract::Limit/; +# This prevents the caching of $dbh in S::A::L, I believe +sub new { + my $self = shift->SUPER::new(@_); + + # If limit_dialect is a ref (like a $dbh), go ahead and replace + # it with what it resolves to: + $self->{limit_dialect} = $self->_find_syntax($self->{limit_dialect}) + if ref $self->{limit_dialect}; + + $self; +} + +sub _RowNumberOver { + my ($self, $sql, $order, $rows, $offset ) = @_; + + $offset += 1; + my $last = $rows + $offset; + my ( $order_by ) = $self->_order_by( $order ); + + $sql = <<""; +SELECT * FROM +( + SELECT Q1.*, ROW_NUMBER() OVER( ) AS ROW_NUM FROM ( + $sql + $order_by + ) Q1 +) Q2 +WHERE ROW_NUM BETWEEN $offset AND $last + + return $sql; +} + + +# While we're at it, this should make LIMIT queries more efficient, +# without digging into things too deeply +use Scalar::Util 'blessed'; +sub _find_syntax { + my ($self, $syntax) = @_; + my $dbhname = blessed($syntax) ? $syntax->{Driver}{Name} : $syntax; + if(ref($self) && $dbhname && $dbhname eq 'DB2') { + return 'RowNumberOver'; + } + + $self->{_cached_syntax} ||= $self->SUPER::_find_syntax($syntax); +} + sub select { my ($self, $table, $fields, $where, $order, @rest) = @_; $table = $self->_quote($table) unless ref($table); + local $self->{rownum_hack_count} = 1 + if (defined $rest[0] && $self->{limit_dialect} eq 'RowNum'); @rest = (-1) unless defined $rest[0]; die "LIMIT 0 Does Not Compute" if $rest[0] == 0; # and anyway, SQL::Abstract::Limit will cause a barf if we don't first @@ -67,7 +121,12 @@ sub _recurse_fields { return $$fields if $ref eq 'SCALAR'; if ($ref eq 'ARRAY') { - return join(', ', map { $self->_recurse_fields($_) } @$fields); + return join(', ', map { + $self->_recurse_fields($_) + .(exists $self->{rownum_hack_count} + ? ' AS col'.$self->{rownum_hack_count}++ + : '') + } @$fields); } elsif ($ref eq 'HASH') { foreach my $func (keys %$fields) { return $self->_sqlcase($func) @@ -92,10 +151,18 @@ sub _order_by { $ret .= $self->_sqlcase(' having ').$frag; } if (defined $_[0]->{order_by}) { - $ret .= $self->SUPER::_order_by($_[0]->{order_by}); + $ret .= $self->_order_by($_[0]->{order_by}); } - } elsif(ref $_[0] eq 'SCALAR') { + } elsif (ref $_[0] eq 'SCALAR') { $ret = $self->_sqlcase(' order by ').${ $_[0] }; + } elsif (ref $_[0] eq 'ARRAY' && @{$_[0]}) { + my @order = @{+shift}; + $ret = $self->_sqlcase(' order by ') + .join(', ', map { + my $r = $self->_order_by($_, @_); + $r =~ s/^ ?ORDER BY //i; + $r; + } @order); } else { $ret = $self->SUPER::_order_by(@_); } @@ -170,9 +237,18 @@ sub _join_condition { if (ref $cond eq 'HASH') { my %j; for (keys %$cond) { - my $x = '= '.$self->_quote($cond->{$_}); $j{$_} = \$x; + my $v = $cond->{$_}; + if (ref $v) { + # XXX no throw_exception() in this package and croak() fails with strange results + Carp::croak(ref($v) . qq{ reference arguments are not supported in JOINS - try using \"..." instead'}) + if ref($v) ne 'SCALAR'; + $j{$_} = $v; + } + else { + my $x = '= '.$self->_quote($v); $j{$_} = \$x; + } }; - return $self->_recurse_where(\%j); + return scalar($self->_recurse_where(\%j)); } elsif (ref $cond eq 'ARRAY') { return join(' OR ', map { $self->_join_condition($_) } @$cond); } else { @@ -196,14 +272,6 @@ sub _quote { return $self->SUPER::_quote($label); } -sub _RowNum { - my $self = shift; - my $c; - $_[0] =~ s/SELECT (.*?) FROM/ - 'SELECT '.join(', ', map { $_.' AS col'.++$c } split(', ', $1)).' FROM'/e; - $self->SUPER::_RowNum(@_); -} - sub limit_dialect { my $self = shift; $self->{limit_dialect} = shift if @_; @@ -224,157 +292,349 @@ sub name_sep { } # End of BEGIN block -use base qw/DBIx::Class/; +=head1 NAME -__PACKAGE__->load_components(qw/AccessorGroup/); +DBIx::Class::Storage::DBI - DBI storage handler -__PACKAGE__->mk_group_accessors('simple' => - qw/_connect_info _dbh _sql_maker _conn_pid _conn_tid debug debugobj - cursor on_connect_do transaction_depth/); +=head1 SYNOPSIS + +=head1 DESCRIPTION + +This class represents the connection to an RDBMS via L. See +L for general information. This pod only +documents DBI-specific methods and behaviors. -=head2 new +=head1 METHODS =cut sub new { - my $new = bless({}, ref $_[0] || $_[0]); + my $new = shift->next::method(@_); + $new->cursor("DBIx::Class::Storage::DBI::Cursor"); $new->transaction_depth(0); + $new->_sql_maker_opts({}); + $new->{_in_dbh_do} = 0; + $new->{_dbh_gen} = 0; - $new->debugobj(new DBIx::Class::Storage::Statistics()); - - my $fh; - if (defined($ENV{DBIX_CLASS_STORAGE_DBI_DEBUG}) && - ($ENV{DBIX_CLASS_STORAGE_DBI_DEBUG} =~ /=(.+)$/)) { - $fh = IO::File->new($1, 'w') - or $new->throw_exception("Cannot open trace file $1"); - } else { - $fh = IO::File->new('>&STDERR'); - } - $new->debugfh($fh); - $new->debug(1) if $ENV{DBIX_CLASS_STORAGE_DBI_DEBUG}; - return $new; + $new; } -=head2 throw_exception +=head2 connect_info -Throws an exception - croaks. +The arguments of C are always a single array reference. -=cut +This is normally accessed via L, which +encapsulates its argument list in an arrayref before calling +C here. -sub throw_exception { - my ($self, $msg) = @_; - croak($msg); -} +The arrayref can either contain the same set of arguments one would +normally pass to L, or a lone code reference which returns +a connected database handle. Please note that the L docs +recommend that you always explicitly set C to either +C<0> or C<1>. L further recommends that it be set +to C<1>, and that you perform transactions via our L +method. L will set it to C<1> if you do not do explicitly +set it to zero. This is the default for most DBDs. See below for more +details. + +In either case, if the final argument in your connect_info happens +to be a hashref, C will look there for several +connection-specific options: -=head1 NAME +=over 4 -DBIx::Class::Storage::DBI - DBI storage handler +=item on_connect_do -=head1 SYNOPSIS +This can be set to an arrayref of literal sql statements, which will +be executed immediately after making the connection to the database +every time we [re-]connect. -=head1 DESCRIPTION +=item disable_sth_caching -This class represents the connection to the database +If set to a true value, this option will disable the caching of +statement handles via L. -=head1 METHODS +=item limit_dialect -=cut +Sets the limit dialect. This is useful for JDBC-bridge among others +where the remote SQL-dialect cannot be determined by the name of the +driver alone. -=head2 connect_info +=item quote_char -The arguments of C are always a single array reference. +Specifies what characters to use to quote table and column names. If +you use this you will want to specify L as well. -This is normally accessed via L, which -encapsulates its argument list in an arrayref before calling -C here. +quote_char expects either a single character, in which case is it is placed +on either side of the table/column, or an arrayref of length 2 in which case the +table/column name is placed between the elements. -The arrayref can either contain the same set of arguments one would -normally pass to L, or a lone code reference which returns -a connected database handle. +For example under MySQL you'd use C '`'>, and user SQL Server you'd +use C [qw/[ ]/]>. + +=item name_sep + +This only needs to be used in conjunction with L, and is used to +specify the charecter that seperates elements (schemas, tables, columns) from +each other. In most cases this is simply a C<.>. + +=item unsafe + +This Storage driver normally installs its own C, sets +C on, and sets C off on all database handles, +including those supplied by a coderef. It does this so that it can +have consistent and useful error behavior. -In either case, there is an optional final element within the arrayref -which can hold a hashref of connection-specific Storage::DBI options. -These include C, and the sql_maker options -C, C, and C. Examples: +If you set this option to a true value, Storage will not do its usual +modifications to the database handle's C, C, and +C attributes, and instead relies on the settings in your +connect_info DBI options (or the values you set in your connection +coderef, in the case that you are connecting via coderef). +Note that your custom settings can cause Storage to malfunction, +especially if you set a C handler that suppresses exceptions +and/or disable C. + +=back + +These options can be mixed in with your other L connection attributes, +or placed in a seperate hashref after all other normal L connection +arguments. + +Every time C is invoked, any previous settings for +these options will be cleared before setting the new ones, regardless of +whether any options are specified in the new C. + +Another Important Note: + +DBIC can do some wonderful magic with handling exceptions, +disconnections, and transactions when you use C +combined with C for transaction support. + +If you set C in your connect info, then you are always +in an assumed transaction between commits, and you're telling us you'd +like to manage that manually. A lot of DBIC's magic protections +go away. We can't protect you from exceptions due to database +disconnects because we don't know anything about how to restart your +transactions. You're on your own for handling all sorts of exceptional +cases if you choose the C path, just as you would +be with raw DBI. + +Examples: + + # Simple SQLite connection ->connect_info([ 'dbi:SQLite:./foo.db' ]); + # Connect via subref ->connect_info([ sub { DBI->connect(...) } ]); + # A bit more complicated ->connect_info( [ 'dbi:Pg:dbname=foo', 'postgres', 'my_pg_password', - { AutoCommit => 0 }, - { quote_char => q{`}, name_sep => q{@} }, + { AutoCommit => 1 }, + { quote_char => q{"}, name_sep => q{.} }, ] ); + # Equivalent to the previous example + ->connect_info( + [ + 'dbi:Pg:dbname=foo', + 'postgres', + 'my_pg_password', + { AutoCommit => 1, quote_char => q{"}, name_sep => q{.} }, + ] + ); + + # Subref + DBIC-specific connection options ->connect_info( [ sub { DBI->connect(...) }, - { quote_char => q{`}, name_sep => q{@} }, + { + quote_char => q{`}, + name_sep => q{@}, + on_connect_do => ['SET search_path TO myschema,otherschema,public'], + disable_sth_caching => 1, + }, ] ); +=cut + +sub connect_info { + my ($self, $info_arg) = @_; + + return $self->_connect_info if !$info_arg; + + # Kill sql_maker/_sql_maker_opts, so we get a fresh one with only + # the new set of options + $self->_sql_maker(undef); + $self->_sql_maker_opts({}); + $self->_connect_info([@$info_arg]); # copy for _connect_info + + my $dbi_info = [@$info_arg]; # copy for _dbi_connect_info + + my $last_info = $dbi_info->[-1]; + if(ref $last_info eq 'HASH') { + for my $storage_opt (qw/on_connect_do disable_sth_caching unsafe/) { + if(my $value = delete $last_info->{$storage_opt}) { + $self->$storage_opt($value); + } + } + for my $sql_maker_opt (qw/limit_dialect quote_char name_sep/) { + if(my $opt_val = delete $last_info->{$sql_maker_opt}) { + $self->_sql_maker_opts->{$sql_maker_opt} = $opt_val; + } + } + + # Get rid of any trailing empty hashref + pop(@$dbi_info) if !keys %$last_info; + } + $self->_dbi_connect_info($dbi_info); + + $self->_connect_info; +} + =head2 on_connect_do -Executes the sql statements given as a listref on every db connect. +This method is deprecated in favor of setting via L. -This option can also be set via L. +=head2 dbh_do -=head2 debug +Arguments: $subref, @extra_coderef_args? -Causes SQL trace information to be emitted on the C object. -(or C if C has not specifically been set). +Execute the given subref using the new exception-based connection management. -=head2 debugfh +The first two arguments will be the storage object that C was called +on and a database handle to use. Any additional arguments will be passed +verbatim to the called subref as arguments 2 and onwards. -Set or retrieve the filehandle used for trace/debug output. This should be -an IO::Handle compatible ojbect (only the C method is used. Initially -set to be STDERR - although see information on the -L environment variable. +Using this (instead of $self->_dbh or $self->dbh) ensures correct +exception handling and reconnection (or failover in future subclasses). + +Your subref should have no side-effects outside of the database, as +there is the potential for your subref to be partially double-executed +if the database connection was stale/dysfunctional. + +Example: + + my @stuff = $schema->storage->dbh_do( + sub { + my ($storage, $dbh, @cols) = @_; + my $cols = join(q{, }, @cols); + $dbh->selectrow_array("SELECT $cols FROM foo"); + }, + @column_list + ); =cut -sub debugfh { - my $self = shift; +sub dbh_do { + my $self = shift; + my $coderef = shift; - if ($self->debugobj->can('debugfh')) { - return $self->debugobj->debugfh(@_); + ref $coderef eq 'CODE' or $self->throw_exception + ('$coderef must be a CODE reference'); + + return $coderef->($self, $self->_dbh, @_) if $self->{_in_dbh_do} + || $self->{transaction_depth}; + + local $self->{_in_dbh_do} = 1; + + my @result; + my $want_array = wantarray; + + eval { + $self->_verify_pid if $self->_dbh; + $self->_populate_dbh if !$self->_dbh; + if($want_array) { + @result = $coderef->($self, $self->_dbh, @_); } -} + elsif(defined $want_array) { + $result[0] = $coderef->($self, $self->_dbh, @_); + } + else { + $coderef->($self, $self->_dbh, @_); + } + }; + + my $exception = $@; + if(!$exception) { return $want_array ? @result : $result[0] } -=head2 debugobj + $self->throw_exception($exception) if $self->connected; -Sets or retrieves the object used for metric collection. Defaults to an instance -of L that is campatible with the original -method of using a coderef as a callback. See the aforementioned Statistics -class for more information. + # We were not connected - reconnect and retry, but let any + # exception fall right through this time + $self->_populate_dbh; + $coderef->($self, $self->_dbh, @_); +} -=head2 debugcb +# This is basically a blend of dbh_do above and DBIx::Class::Storage::txn_do. +# It also informs dbh_do to bypass itself while under the direction of txn_do, +# via $self->{_in_dbh_do} (this saves some redundant eval and errorcheck, etc) +sub txn_do { + my $self = shift; + my $coderef = shift; -Sets a callback to be executed each time a statement is run; takes a sub -reference. Callback is executed as $sub->($op, $info) where $op is -SELECT/INSERT/UPDATE/DELETE and $info is what would normally be printed. + ref $coderef eq 'CODE' or $self->throw_exception + ('$coderef must be a CODE reference'); -See L for a better way. + local $self->{_in_dbh_do} = 1; -=cut + my @result; + my $want_array = wantarray; -sub debugcb { - my $self = shift; + my $tried = 0; + while(1) { + eval { + $self->_verify_pid if $self->_dbh; + $self->_populate_dbh if !$self->_dbh; - if ($self->debugobj->can('callback')) { - return $self->debugobj->callback(@_); + $self->txn_begin; + if($want_array) { + @result = $coderef->(@_); + } + elsif(defined $want_array) { + $result[0] = $coderef->(@_); + } + else { + $coderef->(@_); + } + $self->txn_commit; + }; + + my $exception = $@; + if(!$exception) { return $want_array ? @result : $result[0] } + + if($tried++ > 0 || $self->connected) { + eval { $self->txn_rollback }; + my $rollback_exception = $@; + if($rollback_exception) { + my $exception_class = "DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION"; + $self->throw_exception($exception) # propagate nested rollback + if $rollback_exception =~ /$exception_class/; + + $self->throw_exception( + "Transaction aborted: ${exception}. " + . "Rollback failed: ${rollback_exception}" + ); + } + $self->throw_exception($exception) } + + # We were not connected, and was first try - reconnect and retry + # via the while loop + $self->_populate_dbh; + } } =head2 disconnect -Disconnect the L handle, performing a rollback first if the +Our C method also performs a rollback first if the database is not in C mode. =cut @@ -386,27 +646,21 @@ sub disconnect { $self->_dbh->rollback unless $self->_dbh->{AutoCommit}; $self->_dbh->disconnect; $self->_dbh(undef); + $self->{_dbh_gen}++; } } -=head2 connected - -Check if the L handle is connected. Returns true if the handle -is connected. - -=cut - -sub connected { my ($self) = @_; +sub connected { + my ($self) = @_; if(my $dbh = $self->_dbh) { if(defined $self->_conn_tid && $self->_conn_tid != threads->tid) { - $self->_sql_maker(undef); - return $self->_dbh(undef); + $self->_dbh(undef); + $self->{_dbh_gen}++; + return; } - elsif($self->_conn_pid != $$) { - $self->_dbh->{InactiveDestroy} = 1; - $self->_sql_maker(undef); - return $self->_dbh(undef) + else { + $self->_verify_pid; } return ($dbh->FETCH('Active') && $dbh->ping); } @@ -414,12 +668,19 @@ sub connected { my ($self) = @_; return 0; } -=head2 ensure_connected +# handle pid changes correctly +# NOTE: assumes $self->_dbh is a valid $dbh +sub _verify_pid { + my ($self) = @_; -Check whether the database handle is connected - if not then make a -connection. + return if $self->_conn_pid == $$; -=cut + $self->_dbh->{InactiveDestroy} = 1; + $self->_dbh(undef); + $self->{_dbh_gen}++; + + return; +} sub ensure_connected { my ($self) = @_; @@ -445,16 +706,9 @@ sub dbh { sub _sql_maker_args { my ($self) = @_; - return ( limit_dialect => $self->dbh ); + return ( bindtype=>'columns', limit_dialect => $self->dbh, %{$self->_sql_maker_opts} ); } -=head2 sql_maker - -Returns a C object - normally an object of class -C. - -=cut - sub sql_maker { my ($self) = @_; unless ($self->_sql_maker) { @@ -463,46 +717,18 @@ sub sql_maker { return $self->_sql_maker; } -sub connect_info { - my ($self, $info_arg) = @_; - - if($info_arg) { - my $info = [ @$info_arg ]; # copy because we can alter it - my $last_info = $info->[-1]; - if(ref $last_info eq 'HASH') { - my $used; - if(my $on_connect_do = $last_info->{on_connect_do}) { - $used = 1; - $self->on_connect_do($on_connect_do); - } - for my $sql_maker_opt (qw/limit_dialect quote_char name_sep/) { - if(my $opt_val = $last_info->{$sql_maker_opt}) { - $used = 1; - $self->sql_maker->$sql_maker_opt($opt_val); - } - } - - # remove our options hashref if it was there, to avoid confusing - # DBI in the case the user didn't use all 4 DBI options, as in: - # [ 'dbi:SQLite:foo.db', { quote_char => q{`} } ] - pop(@$info) if $used; - } - - $self->_connect_info($info); - } - - $self->_connect_info; -} - sub _populate_dbh { my ($self) = @_; - my @info = @{$self->_connect_info || []}; + my @info = @{$self->_dbi_connect_info || []}; $self->_dbh($self->_connect(@info)); + # Always set the transaction depth on connect, since + # there is no transaction in progress by definition + $self->{transaction_depth} = $self->_dbh->{AutoCommit} ? 0 : 1; + if(ref $self eq 'DBIx::Class::Storage::DBI') { my $driver = $self->_dbh->{Driver}->{Name}; - eval "require DBIx::Class::Storage::DBI::${driver}"; - unless ($@) { + if ($self->load_optional_class("DBIx::Class::Storage::DBI::${driver}")) { bless $self, "DBIx::Class::Storage::DBI::${driver}"; $self->_rebless() if $self->can('_rebless'); } @@ -523,167 +749,254 @@ sub _connect { my ($self, @info) = @_; $self->throw_exception("You failed to provide any connection info") - if !@info; + if !@info; my ($old_connect_via, $dbh); if ($INC{'Apache/DBI.pm'} && $ENV{MOD_PERL}) { - $old_connect_via = $DBI::connect_via; - $DBI::connect_via = 'connect'; + $old_connect_via = $DBI::connect_via; + $DBI::connect_via = 'connect'; } eval { - $dbh = ref $info[0] eq 'CODE' - ? &{$info[0]} - : DBI->connect(@info); + if(ref $info[0] eq 'CODE') { + $dbh = &{$info[0]} + } + else { + $dbh = DBI->connect(@info); + } + + if(!$self->unsafe) { + my $weak_self = $self; + weaken($weak_self); + $dbh->{HandleError} = sub { + $weak_self->throw_exception("DBI Exception: $_[0]") + }; + $dbh->{RaiseError} = 1; + $dbh->{PrintError} = 0; + } }; $DBI::connect_via = $old_connect_via if $old_connect_via; - if (!$dbh || $@) { - $self->throw_exception("DBI Connection failed: " . ($@ || $DBI::errstr)); - } + $self->throw_exception("DBI Connection failed: " . ($@||$DBI::errstr)) + if !$dbh || $@; $dbh; } -=head2 txn_begin - -Calls begin_work on the current dbh. - -See L for the txn_do() method, which allows for -an entire code block to be executed transactionally. - -=cut sub txn_begin { my $self = shift; - if ($self->{transaction_depth}++ == 0) { - my $dbh = $self->dbh; - if ($dbh->{AutoCommit}) { - $self->debugobj->txn_begin() - if ($self->debug); - $dbh->begin_work; - } + if($self->{transaction_depth}++ == 0) { + $self->debugobj->txn_begin() + if $self->debug; + # this isn't ->_dbh-> because + # we should reconnect on begin_work + # for AutoCommit users + $self->dbh->begin_work; } } -=head2 txn_commit - -Issues a commit against the current dbh. - -=cut - sub txn_commit { my $self = shift; - my $dbh = $self->dbh; - if ($self->{transaction_depth} == 0) { - unless ($dbh->{AutoCommit}) { - $self->debugobj->txn_commit() - if ($self->debug); - $dbh->commit; - } + if ($self->{transaction_depth} == 1) { + my $dbh = $self->_dbh; + $self->debugobj->txn_commit() + if ($self->debug); + $dbh->commit; + $self->{transaction_depth} = 0 + if $dbh->{AutoCommit}; } - else { - if (--$self->{transaction_depth} == 0) { - $self->debugobj->txn_commit() - if ($self->debug); - $dbh->commit; - } + elsif($self->{transaction_depth} > 1) { + $self->{transaction_depth}-- } } -=head2 txn_rollback - -Issues a rollback against the current dbh. A nested rollback will -throw a L exception, -which allows the rollback to propagate to the outermost transaction. - -=cut - sub txn_rollback { my $self = shift; - + my $dbh = $self->_dbh; + my $autocommit; eval { - my $dbh = $self->dbh; - if ($self->{transaction_depth} == 0) { - unless ($dbh->{AutoCommit}) { - $self->debugobj->txn_rollback() - if ($self->debug); - $dbh->rollback; - } + $autocommit = $dbh->{AutoCommit}; + if ($self->{transaction_depth} == 1) { + $self->debugobj->txn_rollback() + if ($self->debug); + $dbh->rollback; + $self->{transaction_depth} = 0 + if $autocommit; + } + elsif($self->{transaction_depth} > 1) { + $self->{transaction_depth}--; } else { - if (--$self->{transaction_depth} == 0) { - $self->debugobj->txn_rollback() - if ($self->debug); - $dbh->rollback; - } - else { - die DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION->new; - } + die DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION->new; } }; - if ($@) { my $error = $@; my $exception_class = "DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION"; $error =~ /$exception_class/ and $self->throw_exception($error); - $self->{transaction_depth} = 0; # ensure that a failed rollback - $self->throw_exception($error); # resets the transaction depth + # ensure that a failed rollback resets the transaction depth + $self->{transaction_depth} = $autocommit ? 0 : 1; + $self->throw_exception($error); } } -sub _execute { - my ($self, $op, $extra_bind, $ident, @args) = @_; - my ($sql, @bind) = $self->sql_maker->$op($ident, @args); - unshift(@bind, @$extra_bind) if $extra_bind; +# This used to be the top-half of _execute. It was split out to make it +# easier to override in NoBindVars without duping the rest. It takes up +# all of _execute's args, and emits $sql, @bind. +sub _prep_for_execute { + my ($self, $op, $extra_bind, $ident, $args) = @_; + + my ($sql, @bind) = $self->sql_maker->$op($ident, @$args); + unshift(@bind, + map { ref $_ eq 'ARRAY' ? $_ : [ '!!dummy', $_ ] } @$extra_bind) + if $extra_bind; + + return ($sql, \@bind); +} + +sub _dbh_execute { + my ($self, $dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_; + + if( blessed($ident) && $ident->isa("DBIx::Class::ResultSource") ) { + $ident = $ident->from(); + } + + my ($sql, $bind) = $self->_prep_for_execute($op, $extra_bind, $ident, \@args); + if ($self->debug) { - my @debug_bind = map { defined $_ ? qq{'$_'} : q{'NULL'} } @bind; + my @debug_bind = + map { defined ($_ && $_->[1]) ? qq{'$_->[1]'} : q{'NULL'} } @$bind; $self->debugobj->query_start($sql, @debug_bind); } - my $sth = eval { $self->sth($sql,$op) }; - if (!$sth || $@) { - $self->throw_exception( - 'no sth generated via sql (' . ($@ || $self->_dbh->errstr) . "): $sql" - ); - } - @bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args - my $rv; - if ($sth) { - my $time = time(); - $rv = eval { $sth->execute(@bind) }; - - if ($@ || !$rv) { - $self->throw_exception("Error executing '$sql': ".($@ || $sth->errstr)); + my $sth = $self->sth($sql,$op); + + my $placeholder_index = 1; + + foreach my $bound (@$bind) { + my $attributes = {}; + my($column_name, @data) = @$bound; + + if ($bind_attributes) { + $attributes = $bind_attributes->{$column_name} + if defined $bind_attributes->{$column_name}; + } + + foreach my $data (@data) { + $data = ref $data ? ''.$data : $data; # stringify args + + $sth->bind_param($placeholder_index, $data, $attributes); + $placeholder_index++; } - } else { - $self->throw_exception("'$sql' did not generate a statement."); } + + # Can this fail without throwing an exception anyways??? + my $rv = $sth->execute(); + $self->throw_exception($sth->errstr) if !$rv; + if ($self->debug) { - my @debug_bind = map { defined $_ ? qq{`$_'} : q{`NULL'} } @bind; - $self->debugobj->query_end($sql, @debug_bind); + my @debug_bind = + map { defined ($_ && $_->[1]) ? qq{'$_->[1]'} : q{'NULL'} } @$bind; + $self->debugobj->query_end($sql, @debug_bind); } - return (wantarray ? ($rv, $sth, @bind) : $rv); + + return (wantarray ? ($rv, $sth, @$bind) : $rv); +} + +sub _execute { + my $self = shift; + $self->dbh_do($self->can('_dbh_execute'), @_) } sub insert { - my ($self, $ident, $to_insert) = @_; - $self->throw_exception( - "Couldn't insert ".join(', ', - map "$_ => $to_insert->{$_}", keys %$to_insert - )." into ${ident}" - ) unless ($self->_execute('insert' => [], $ident, $to_insert)); + my ($self, $source, $to_insert) = @_; + + my $ident = $source->from; + my $bind_attributes = $self->source_bind_attributes($source); + + $self->_execute('insert' => [], $source, $bind_attributes, $to_insert); + return $to_insert; } +## Still not quite perfect, and EXPERIMENTAL +## Currently it is assumed that all values passed will be "normal", i.e. not +## scalar refs, or at least, all the same type as the first set, the statement is +## only prepped once. +sub insert_bulk { + my ($self, $source, $cols, $data) = @_; + my %colvalues; + my $table = $source->from; + @colvalues{@$cols} = (0..$#$cols); + my ($sql, @bind) = $self->sql_maker->insert($table, \%colvalues); + + if ($self->debug) { + my @debug_bind = map { defined $_->[1] ? qq{$_->[1]} : q{'NULL'} } @bind; + $self->debugobj->query_start($sql, @debug_bind); + } + my $sth = $self->sth($sql); + +# @bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args + + ## This must be an arrayref, else nothing works! + + my $tuple_status = []; + + ##use Data::Dumper; + ##print STDERR Dumper( $data, $sql, [@bind] ); + + my $time = time(); + + ## Get the bind_attributes, if any exist + my $bind_attributes = $self->source_bind_attributes($source); + + ## Bind the values and execute + my $placeholder_index = 1; + + foreach my $bound (@bind) { + + my $attributes = {}; + my ($column_name, $data_index) = @$bound; + + if( $bind_attributes ) { + $attributes = $bind_attributes->{$column_name} + if defined $bind_attributes->{$column_name}; + } + + my @data = map { $_->[$data_index] } @$data; + + $sth->bind_param_array( $placeholder_index, [@data], $attributes ); + $placeholder_index++; + } + my $rv = $sth->execute_array({ArrayTupleStatus => $tuple_status}); + $self->throw_exception($sth->errstr) if !$rv; + + if ($self->debug) { + my @debug_bind = map { defined $_ ? qq{`$_'} : q{`NULL'} } @bind; + $self->debugobj->query_end($sql, @debug_bind); + } + return (wantarray ? ($rv, $sth, @bind) : $rv); +} + sub update { - return shift->_execute('update' => [], @_); + my $self = shift @_; + my $source = shift @_; + my $bind_attributes = $self->source_bind_attributes($source); + + return $self->_execute('update' => [], $source, $bind_attributes, @_); } + sub delete { - return shift->_execute('delete' => [], @_); + my $self = shift @_; + my $source = shift @_; + + my $bind_attrs = {}; ## If ever it's needed... + + return $self->_execute('delete' => [], $source, $bind_attrs, @_); } sub _select { @@ -699,7 +1012,8 @@ sub _select { ($order ? (order_by => $order) : ()) }; } - my @args = ('select', $attrs->{bind}, $ident, $select, $condition, $order); + my $bind_attrs = {}; ## Future support + my @args = ('select', $attrs->{bind}, $ident, $bind_attrs, $select, $condition, $order); if ($attrs->{software_limit} || $self->sql_maker->_default_limit_syntax eq "GenericSubQ") { $attrs->{software_limit} = 1; @@ -711,8 +1025,28 @@ sub _select { return $self->_execute(@args); } +sub source_bind_attributes { + my ($self, $source) = @_; + + my $bind_attributes; + foreach my $column ($source->columns) { + + my $data_type = $source->column_info($column)->{data_type} || ''; + $bind_attributes->{$column} = $self->bind_attribute_by_data_type($data_type) + if $data_type; + } + + return $bind_attributes; +} + =head2 select +=over 4 + +=item Arguments: $ident, $select, $condition, $attrs + +=back + Handle a SQL select statement. =cut @@ -723,52 +1057,52 @@ sub select { return $self->cursor->new($self, \@_, $attrs); } -=head2 select_single - -Performs a select, fetch and return of data - handles a single row -only. - -=cut - -# Need to call finish() to work round broken DBDs - sub select_single { my $self = shift; my ($rv, $sth, @bind) = $self->_select(@_); my @row = $sth->fetchrow_array; + # Need to call finish() to work round broken DBDs $sth->finish(); return @row; } =head2 sth +=over 4 + +=item Arguments: $sql + +=back + Returns a L sth (statement handle) for the supplied SQL. =cut -sub sth { - my ($self, $sql) = @_; - # 3 is the if_active parameter which avoids active sth re-use - return $self->dbh->prepare_cached($sql, {}, 3); -} +sub _dbh_sth { + my ($self, $dbh, $sql) = @_; -=head2 columns_info_for + # 3 is the if_active parameter which avoids active sth re-use + my $sth = $self->disable_sth_caching + ? $dbh->prepare($sql) + : $dbh->prepare_cached($sql, {}, 3); -Returns database type info for a given table columns. + # XXX You would think RaiseError would make this impossible, + # but apparently that's not true :( + $self->throw_exception($dbh->errstr) if !$sth; -=cut + $sth; +} -sub columns_info_for { - my ($self, $table) = @_; +sub sth { + my ($self, $sql) = @_; + $self->dbh_do($self->can('_dbh_sth'), $sql); +} - my $dbh = $self->dbh; +sub _dbh_columns_info_for { + my ($self, $dbh, $table) = @_; if ($dbh->can('column_info')) { my %result; - my $old_raise_err = $dbh->{RaiseError}; - my $old_print_err = $dbh->{PrintError}; - $dbh->{RaiseError} = 1; - $dbh->{PrintError} = 0; eval { my ($schema,$tab) = $table =~ /^(.+?)\.(.+)$/ ? ($1,$2) : (undef,$table); my $sth = $dbh->column_info( undef,$schema, $tab, '%' ); @@ -785,24 +1119,16 @@ sub columns_info_for { $result{$col_name} = \%column_info; } }; - $dbh->{RaiseError} = $old_raise_err; - $dbh->{PrintError} = $old_print_err; - return \%result if !$@; + return \%result if !$@ && scalar keys %result; } my %result; - my $sth = $dbh->prepare("SELECT * FROM $table WHERE 1=0"); + my $sth = $dbh->prepare($self->sql_maker->select($table, undef, \'1 = 0')); $sth->execute; my @columns = @{$sth->{NAME_lc}}; for my $i ( 0 .. $#columns ){ my %column_info; - my $type_num = $sth->{TYPE}->[$i]; - my $type_name; - if(defined $type_num && $dbh->can('type_info')) { - my $type_info = $dbh->type_info($type_num); - $type_name = $type_info->{TYPE_NAME} if $type_info; - } - $column_info{data_type} = $type_name ? $type_name : $type_num; + $column_info{data_type} = $sth->{TYPE}->[$i]; $column_info{size} = $sth->{PRECISION}->[$i]; $column_info{is_nullable} = $sth->{NULLABLE}->[$i] ? 1 : 0; @@ -813,21 +1139,42 @@ sub columns_info_for { $result{$columns[$i]} = \%column_info; } + $sth->finish; + + foreach my $col (keys %result) { + my $colinfo = $result{$col}; + my $type_num = $colinfo->{data_type}; + my $type_name; + if(defined $type_num && $dbh->can('type_info')) { + my $type_info = $dbh->type_info($type_num); + $type_name = $type_info->{TYPE_NAME} if $type_info; + $colinfo->{data_type} = $type_name if $type_name; + } + } return \%result; } +sub columns_info_for { + my ($self, $table) = @_; + $self->dbh_do($self->can('_dbh_columns_info_for'), $table); +} + =head2 last_insert_id Return the row id of the last insert. =cut -sub last_insert_id { - my ($self, $row) = @_; - - return $self->dbh->func('last_insert_rowid'); +sub _dbh_last_insert_id { + my ($self, $dbh, $source, $col) = @_; + # XXX This is a SQLite-ism as a default... is there a DBI-generic way? + $dbh->func('last_insert_rowid'); +} +sub last_insert_id { + my $self = shift; + $self->dbh_do($self->can('_dbh_last_insert_id'), @_); } =head2 sqlt_type @@ -838,15 +1185,29 @@ Returns the database driver name. sub sqlt_type { shift->dbh->{Driver}->{Name} } +=head2 bind_attribute_by_data_type + +Given a datatype from column info, returns a database specific bind attribute for +$dbh->bind_param($val,$attribute) or nothing if we will let the database planner +just handle it. + +Generally only needed for special case column types, like bytea in postgres. + +=cut + +sub bind_attribute_by_data_type { + return; +} + =head2 create_ddl_dir (EXPERIMENTAL) =over 4 -=item Arguments: $schema \@databases, $version, $directory, $sqlt_args +=item Arguments: $schema \@databases, $version, $directory, $preversion, $sqlt_args =back -Creates an SQL file based on the Schema, for each of the specified +Creates a SQL file based on the Schema, for each of the specified database types, in the given directory. Note that this feature is currently EXPERIMENTAL and may not work correctly @@ -856,7 +1217,7 @@ across all databases, or fully handle complex relationships. sub create_ddl_dir { - my ($self, $schema, $databases, $version, $dir, $sqltargs) = @_; + my ($self, $schema, $databases, $version, $dir, $preversion, $sqltargs) = @_; if(!$dir || !-d $dir) { @@ -866,9 +1227,11 @@ sub create_ddl_dir $databases ||= ['MySQL', 'SQLite', 'PostgreSQL']; $databases = [ $databases ] if(ref($databases) ne 'ARRAY'); $version ||= $schema->VERSION || '1.x'; + $sqltargs = { ( add_drop_table => 1 ), %{$sqltargs || {}} }; - eval "use SQL::Translator"; - $self->throw_exception("Can't deploy without SQL::Translator: $@") if $@; + $self->throw_exception(q{Can't create a ddl file without SQL::Translator 0.08: '} + . $self->_check_sqlt_message . q{'}) + if !$self->_check_sqlt_version; my $sqlt = SQL::Translator->new({ # debug => 1, @@ -879,6 +1242,7 @@ sub create_ddl_dir $sqlt->reset(); $sqlt->parser('SQL::Translator::Parser::DBIx::Class'); # $sqlt->parser_args({'DBIx::Class' => $schema); + $sqlt = $self->configure_sqlt($sqlt, $db); $sqlt->data($schema); $sqlt->producer($db); @@ -886,86 +1250,168 @@ sub create_ddl_dir my $filename = $schema->ddl_filename($db, $dir, $version); if(-e $filename) { - $self->throw_exception("$filename already exists, skipping $db"); + warn("$filename already exists, skipping $db"); next; } - open($file, ">$filename") - or $self->throw_exception("Can't open $filename for writing ($!)"); + my $output = $sqlt->translate; -#use Data::Dumper; -# print join(":", keys %{$schema->source_registrations}); -# print Dumper($sqlt->schema); if(!$output) { - $self->throw_exception("Failed to translate to $db. (" . $sqlt->error . ")"); + warn("Failed to translate to $db, skipping. (" . $sqlt->error . ")"); next; } + if(!open($file, ">$filename")) + { + $self->throw_exception("Can't open $filename for writing ($!)"); + next; + } print $file $output; close($file); + + if($preversion) + { + require SQL::Translator::Diff; + + my $prefilename = $schema->ddl_filename($db, $dir, $preversion); +# print "Previous version $prefilename\n"; + if(!-e $prefilename) + { + warn("No previous schema file found ($prefilename)"); + next; + } + #### We need to reparse the SQLite file we just wrote, so that + ## Diff doesnt get all confoosed, and Diff is *very* confused. + ## FIXME: rip Diff to pieces! +# my $target_schema = $sqlt->schema; +# unless ( $target_schema->name ) { +# $target_schema->name( $filename ); +# } + my @input; + push @input, {file => $prefilename, parser => $db}; + push @input, {file => $filename, parser => $db}; + my ( $source_schema, $source_db, $target_schema, $target_db ) = map { + my $file = $_->{'file'}; + my $parser = $_->{'parser'}; + + my $t = SQL::Translator->new; + $t->debug( 0 ); + $t->trace( 0 ); + $t->parser( $parser ) or die $t->error; + my $out = $t->translate( $file ) or die $t->error; + my $schema = $t->schema; + unless ( $schema->name ) { + $schema->name( $file ); + } + ($schema, $parser); + } @input; + + my $diff = SQL::Translator::Diff::schema_diff($source_schema, $db, + $target_schema, $db, + {} + ); + my $difffile = $schema->ddl_filename($db, $dir, $version, $preversion); + print STDERR "Diff: $difffile: $db, $dir, $version, $preversion \n"; + if(-e $difffile) + { + warn("$difffile already exists, skipping"); + next; + } + if(!open $file, ">$difffile") + { + $self->throw_exception("Can't write to $difffile ($!)"); + next; + } + print $file $diff; + close($file); + } } +} +sub configure_sqlt() { + my $self = shift; + my $tr = shift; + my $db = shift || $self->sqlt_type; + if ($db eq 'PostgreSQL') { + $tr->quote_table_names(0); + $tr->quote_field_names(0); + } + return $tr; } =head2 deployment_statements -Create the statements for L and -L. +=over 4 + +=item Arguments: $schema, $type, $version, $directory, $sqlt_args + +=back + +Returns the statements used by L and L. +The database driver name is given by C<$type>, though the value from +L is used if it is not specified. + +C<$directory> is used to return statements from files in a previously created +L directory and is optional. The filenames are constructed +from L, the schema name and the C<$version>. + +If no C<$directory> is specified then the statements are constructed on the +fly using L and C<$version> is ignored. + +See L for a list of values for C<$sqlt_args>. =cut sub deployment_statements { my ($self, $schema, $type, $version, $dir, $sqltargs) = @_; + # Need to be connected to get the correct sqlt_type + $self->ensure_connected() unless $type; $type ||= $self->sqlt_type; $version ||= $schema->VERSION || '1.x'; $dir ||= './'; - eval "use SQL::Translator"; - if(!$@) - { - eval "use SQL::Translator::Parser::DBIx::Class;"; - $self->throw_exception($@) if $@; - eval "use SQL::Translator::Producer::${type};"; - $self->throw_exception($@) if $@; - my $tr = SQL::Translator->new(%$sqltargs); - SQL::Translator::Parser::DBIx::Class::parse( $tr, $schema ); - return "SQL::Translator::Producer::${type}"->can('produce')->($tr); - } - my $filename = $schema->ddl_filename($type, $dir, $version); - if(!-f $filename) + if(-f $filename) { -# $schema->create_ddl_dir([ $type ], $version, $dir, $sqltargs); - $self->throw_exception("No SQL::Translator, and no Schema file found, aborting deploy"); - return; + my $file; + open($file, "<$filename") + or $self->throw_exception("Can't open $filename ($!)"); + my @rows = <$file>; + close($file); + return join('', @rows); } - my $file; - open($file, "<$filename") - or $self->throw_exception("Can't open $filename ($!)"); - my @rows = <$file>; - close($file); - return join('', @rows); - -} + $self->throw_exception(q{Can't deploy without SQL::Translator 0.08: '} + . $self->_check_sqlt_message . q{'}) + if !$self->_check_sqlt_version; -=head2 deploy + require SQL::Translator::Parser::DBIx::Class; + eval qq{use SQL::Translator::Producer::${type}}; + $self->throw_exception($@) if $@; -Sends the appropriate statements to create or modify tables to the -db. This would normally be called through -L. + # sources needs to be a parser arg, but for simplicty allow at top level + # coming in + $sqltargs->{parser_args}{sources} = delete $sqltargs->{sources} + if exists $sqltargs->{sources}; -=cut + my $tr = SQL::Translator->new(%$sqltargs); + SQL::Translator::Parser::DBIx::Class::parse( $tr, $schema ); + return "SQL::Translator::Producer::${type}"->can('produce')->($tr); + + return; + +} sub deploy { - my ($self, $schema, $type, $sqltargs) = @_; - foreach my $statement ( $self->deployment_statements($schema, $type, undef, undef, $sqltargs) ) { + my ($self, $schema, $type, $sqltargs, $dir) = @_; + foreach my $statement ( $self->deployment_statements($schema, $type, undef, $dir, { no_comments => 1, %{ $sqltargs || {} } } ) ) { for ( split(";\n", $statement)) { next if($_ =~ /^--/); next if(!$_); # next if($_ =~ /^DROP/m); next if($_ =~ /^BEGIN TRANSACTION/m); next if($_ =~ /^COMMIT/m); - $self->debugobj->query_begin($_) if $self->debug; - $self->dbh->do($_) or warn "SQL was:\n $_"; + next if $_ =~ /^\s+$/; # skip whitespace only + $self->debugobj->query_start($_) if $self->debug; + $self->dbh->do($_); # shouldn't be using ->dbh ? $self->debugobj->query_end($_) if $self->debug; } } @@ -1005,7 +1451,28 @@ sub build_datetime_parser { return $type; } -sub DESTROY { shift->disconnect } +{ + my $_check_sqlt_version; # private + my $_check_sqlt_message; # private + sub _check_sqlt_version { + return $_check_sqlt_version if defined $_check_sqlt_version; + eval 'use SQL::Translator 0.08'; + $_check_sqlt_message = $@ ? $@ : ''; + $_check_sqlt_version = $@ ? 0 : 1; + } + + sub _check_sqlt_message { + _check_sqlt_version if !defined $_check_sqlt_message; + $_check_sqlt_message; + } +} + +sub DESTROY { + my $self = shift; + return if !$self->_dbh; + $self->_verify_pid; + $self->_dbh(undef); +} 1; @@ -1029,51 +1496,21 @@ The following methods are extended:- =item limit_dialect -Accessor for setting limit dialect. This is useful -for JDBC-bridge among others where the remote SQL-dialect cannot -be determined by the name of the driver alone. - -This option can also be set via L. +See L for details. +For setting, this method is deprecated in favor of L. =item quote_char -Specifies what characters to use to quote table and column names. If -you use this you will want to specify L as well. - -quote_char expectes either a single character, in which case is it is placed -on either side of the table/column, or an arrayref of length 2 in which case the -table/column name is placed between the elements. - -For example under MySQL you'd use C, and user SQL Server you'd -use C. - -This option can also be set via L. +See L for details. +For setting, this method is deprecated in favor of L. =item name_sep -This only needs to be used in conjunction with L, and is used to -specify the charecter that seperates elements (schemas, tables, columns) from -each other. In most cases this is simply a C<.>. - -This option can also be set via L. +See L for details. +For setting, this method is deprecated in favor of L. =back -=head1 ENVIRONMENT VARIABLES - -=head2 DBIX_CLASS_STORAGE_DBI_DEBUG - -If C is set then SQL trace information -is produced (as when the L method is set). - -If the value is of the form C<1=/path/name> then the trace output is -written to the file C. - -This environment variable is checked when the storage object is first -created (when you call connect on your schema). So, run-time changes -to this environment variable will not take effect unless you also -re-connect on your schema. - =head1 AUTHORS Matt S. Trout @@ -1085,4 +1522,3 @@ Andy Grundman You may distribute this code under the same terms as Perl itself. =cut -