use DBI;
use SQL::Abstract::Limit;
use DBIx::Class::Storage::DBI::Cursor;
+use IO::File;
+use Carp::Clan qw/DBIx::Class/;
BEGIN {
sub _quote {
my ($self, $label) = @_;
return '' unless defined $label;
+ return $label unless $self->{quote_char};
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(@_);
+}
+
+# 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.
+#
+sub limit_dialect {
+ my $self = shift;
+ $self->{limit_dialect} = shift if @_;
+ return $self->{limit_dialect};
+}
+
+package DBIx::Class::Storage::DBI::DebugCallback;
+
+sub print {
+ my ($self, $string) = @_;
+ $string =~ m/^(\w+)/;
+ ${$self}->($1, $string);
+}
+
} # End of BEGIN block
use base qw/DBIx::Class/;
-__PACKAGE__->load_components(qw/Exception AccessorGroup/);
+__PACKAGE__->load_components(qw/AccessorGroup/);
__PACKAGE__->mk_group_accessors('simple' =>
- qw/connect_info _dbh _sql_maker debug cursor/);
-
-our $TRANSACTION = 0;
+ qw/connect_info _dbh _sql_maker debug debugfh cursor on_connect_do transaction_depth/);
sub new {
my $new = bless({}, ref $_[0] || $_[0]);
$new->cursor("DBIx::Class::Storage::DBI::Cursor");
+ $new->transaction_depth(0);
+ if (defined($ENV{DBIX_CLASS_STORAGE_DBI_DEBUG}) &&
+ ($ENV{DBIX_CLASS_STORAGE_DBI_DEBUG} =~ /=(.+)$/)) {
+ $new->debugfh(IO::File->new($1, 'w')||croak "Cannot open trace file $1");
+ } else {
+ $new->debugfh(IO::File->new('>&STDERR'));
+ }
$new->debug(1) if $ENV{DBIX_CLASS_STORAGE_DBI_DEBUG};
return $new;
}
=cut
-sub dbh {
+=head2 on_connect_do
+
+Executes the sql statements given as a listref on every db connect.
+
+=head2 debug
+
+Causes SQL trace information to be emitted on C<debugfh> filehandle
+(or C<STDERR> if C<debugfh> has not specifically been set).
+
+=head2 debugfh
+
+Sets or retrieves the filehandle used for trace/debug output. This
+should be an IO::Handle compatible object (only the C<print> method is
+used). Initially set to be STDERR - although see information on the
+L<DBIX_CLASS_STORAGE_DBI_DEBUG> environment variable.
+
+=head2 debugcb
+
+Sets a callback to be executed each time a statement is run; takes a sub
+reference. Overrides debugfh. Callback is executed as $sub->($op, $info)
+where $op is SELECT/INSERT/UPDATE/DELETE and $info is what would normally
+be printed.
+
+=cut
+
+sub debugcb {
+ my ($self, $cb) = @_;
+ my $cb_obj = bless(\$cb, 'DBIx::Class::Storage::DBI::DebugCallback');
+ $self->debugfh($cb_obj);
+}
+
+sub disconnect {
+ my ($self) = @_;
+
+ if( $self->connected ) {
+ $self->_dbh->rollback unless $self->_dbh->{AutoCommit};
+ $self->_dbh->disconnect;
+ $self->_dbh(undef);
+ }
+}
+
+sub connected {
my ($self) = @_;
+
my $dbh;
- unless (($dbh = $self->_dbh) && $dbh->FETCH('Active') && $dbh->ping) {
+ (($dbh = $self->_dbh) && $dbh->FETCH('Active') && $dbh->ping)
+}
+
+sub ensure_connected {
+ my ($self) = @_;
+
+ unless ($self->connected) {
$self->_populate_dbh;
}
+}
+
+sub dbh {
+ my ($self) = @_;
+
+ $self->ensure_connected;
return $self->_dbh;
}
my ($self) = @_;
my @info = @{$self->connect_info || []};
$self->_dbh($self->_connect(@info));
+
+ # if on-connect sql statements are given execute them
+ foreach my $sql_statement (@{$self->on_connect_do || []}) {
+ $self->_dbh->do($sql_statement);
+ }
}
sub _connect {
=cut
sub txn_begin {
- $_[0]->dbh->begin_work if $TRANSACTION++ == 0 and $_[0]->dbh->{AutoCommit};
+ my $self = shift;
+ $self->dbh->begin_work if $self->{transaction_depth}++ == 0 and $self->dbh->{AutoCommit};
}
=head2 txn_commit
=cut
sub txn_commit {
- if ($TRANSACTION == 0) {
- $_[0]->dbh->commit;
+ my $self = shift;
+ if ($self->{transaction_depth} == 0) {
+ $self->dbh->commit unless $self->dbh->{AutoCommit};
}
else {
- $_[0]->dbh->commit if --$TRANSACTION == 0;
+ $self->dbh->commit if --$self->{transaction_depth} == 0;
}
}
=cut
sub txn_rollback {
- if ($TRANSACTION == 0) {
- $_[0]->dbh->rollback;
+ my $self = shift;
+ if ($self->{transaction_depth} == 0) {
+ $self->dbh->rollback unless $self->dbh->{AutoCommit};
}
else {
- --$TRANSACTION == 0 ? $_[0]->dbh->rollback : die $@;
+ --$self->{transaction_depth} == 0 ? $self->dbh->rollback : die $@;
}
}
my ($self, $op, $extra_bind, $ident, @args) = @_;
my ($sql, @bind) = $self->sql_maker->$op($ident, @args);
unshift(@bind, @$extra_bind) if $extra_bind;
- warn "$sql: @bind" if $self->debug;
+ if ($self->debug) {
+ my @debug_bind = map { defined $_ ? $_ : 'NULL' } @bind;
+ $self->debugfh->print("$sql: @debug_bind\n");
+ }
my $sth = $self->sth($sql,$op);
@bind = map { ref $_ ? ''.$_ : $_ } @bind; # stringify args
- my $rv = $sth->execute(@bind);
+ my $rv;
+ if ($sth) {
+ $rv = $sth->execute(@bind);
+ } else {
+ croak "'$sql' did not generate a statement.";
+ }
return (wantarray ? ($rv, $sth, @bind) : $rv);
}
sub insert {
my ($self, $ident, $to_insert) = @_;
- $self->throw( "Couldn't insert ".join(', ', map "$_ => $to_insert->{$_}", keys %$to_insert)." into ${ident}" )
+ croak( "Couldn't insert ".join(', ', map "$_ => $to_insert->{$_}", keys %$to_insert)." into ${ident}" )
unless ($self->_execute('insert' => [], $ident, $to_insert));
return $to_insert;
}
return $self->cursor->new($self, \@_, $attrs);
}
+# Need to call finish() to work round broken DBDs
+
sub select_single {
my $self = shift;
my ($rv, $sth, @bind) = $self->_select(@_);
- return $sth->fetchrow_array;
+ my @row = $sth->fetchrow_array;
+ $sth->finish();
+ return @row;
}
sub sth {
sub columns_info_for {
my ($self, $table) = @_;
- my $sth = $self->dbh->prepare("SELECT * FROM $table WHERE 1=0");
- $sth->execute;
my %result;
- my @columns = @{$sth->{NAME}};
- for my $i ( 0 .. $#columns ){
- my $type = $sth->{TYPE}->[$i];
- my $info = $self->dbh->type_info($type);
- my %column_info;
- if ( $info ){
+ if ( $self->dbh->can( 'column_info' ) ){
+ my $sth = $self->dbh->column_info( undef, undef, $table, '%' );
+ $sth->execute();
+ while ( my $info = $sth->fetchrow_hashref() ){
+ my %column_info;
$column_info{data_type} = $info->{TYPE_NAME};
$column_info{size} = $info->{COLUMN_SIZE};
$column_info{is_nullable} = $info->{NULLABLE};
- }else{
- $column_info{data_type} = $type;
+ $result{$info->{COLUMN_NAME}} = \%column_info;
+ }
+ }else{
+ my $sth = $self->dbh->prepare("SELECT * FROM $table WHERE 1=0");
+ $sth->execute;
+ my @columns = @{$sth->{NAME}};
+ for my $i ( 0 .. $#columns ){
+ $result{$columns[$i]}{data_type} = $sth->{TYPE}->[$i];
}
- $result{$columns[$i]} = \%column_info;
}
return \%result;
}
+sub DESTROY { shift->disconnect }
+
1;
+=head1 ENVIRONMENT VARIABLES
+
+=head2 DBIX_CLASS_STORAGE_DBI_DEBUG
+
+If C<DBIX_CLASS_STORAGE_DBI_DEBUG> is set then SQL trace information
+is produced (as when the L<debug> method is set).
+
+If the value is of the form C<1=/path/name> then the trace output is
+written to the file C</path/name>.
+
=head1 AUTHORS
Matt S. Trout <mst@shadowcatsystems.co.uk>
projects / dbsrgits/DBIx-Class.git / blobdiff