use DBI;
use SQL::Abstract::Limit;
use DBIx::Class::Storage::DBI::Cursor;
+use IO::File;
+use Carp::Clan qw/DBIx::Class/;
BEGIN {
-package DBIC::SQL::Abstract; # Temporary. Merge upstream.
+package DBIC::SQL::Abstract; # Would merge upstream, but nate doesn't reply :(
use base qw/SQL::Abstract::Limit/;
+sub select {
+ my ($self, $table, $fields, $where, $order, @rest) = @_;
+ @rest = (-1) unless defined $rest[0];
+ $self->SUPER::select($table, $self->_recurse_fields($fields),
+ $where, $order, @rest);
+}
+
+sub _emulate_limit {
+ my $self = shift;
+ if ($_[3] == -1) {
+ return $_[1].$self->_order_by($_[2]);
+ } else {
+ return $self->SUPER::_emulate_limit(@_);
+ }
+}
+
+sub _recurse_fields {
+ my ($self, $fields) = @_;
+ my $ref = ref $fields;
+ return $self->_quote($fields) unless $ref;
+ return $$fields if $ref eq 'SCALAR';
+
+ if ($ref eq 'ARRAY') {
+ return join(', ', map { $self->_recurse_fields($_) } @$fields);
+ } elsif ($ref eq 'HASH') {
+ foreach my $func (keys %$fields) {
+ return $self->_sqlcase($func)
+ .'( '.$self->_recurse_fields($fields->{$func}).' )';
+ }
+ }
+}
+
+sub _order_by {
+ my $self = shift;
+ my $ret = '';
+ if (ref $_[0] eq 'HASH') {
+ if (defined $_[0]->{group_by}) {
+ $ret = $self->_sqlcase(' group by ')
+ .$self->_recurse_fields($_[0]->{group_by});
+ }
+ if (defined $_[0]->{order_by}) {
+ $ret .= $self->SUPER::_order_by($_[0]->{order_by});
+ }
+ } else {
+ $ret = $self->SUPER::_order_by(@_);
+ }
+ return $ret;
+}
+
sub _table {
my ($self, $from) = @_;
if (ref $from eq 'ARRAY') {
foreach my $j (@join) {
my ($to, $on) = @$j;
- # check whether a join type exists
- my $join_clause = '';
- if (ref($to) eq 'HASH' and exists($to->{-join_type})) {
- $join_clause = ' '.uc($to->{-join_type}).' JOIN ';
- } else {
- $join_clause = ' JOIN ';
- }
+ # check whether a join type exists
+ my $join_clause = '';
+ if (ref($to) eq 'HASH' and exists($to->{-join_type})) {
+ $join_clause = ' '.uc($to->{-join_type}).' JOIN ';
+ } else {
+ $join_clause = ' JOIN ';
+ }
push(@sqlf, $join_clause);
if (ref $to eq 'ARRAY') {
sub _make_as {
my ($self, $from) = @_;
- return join(' ', map { $self->_quote($_) }
+ return join(' ', map { (ref $_ eq 'SCALAR' ? $$_ : $self->_quote($_)) }
reverse each %{$self->_skip_options($from)});
}
sub _skip_options {
- my ($self, $hash) = @_;
- my $clean_hash = {};
- $clean_hash->{$_} = $hash->{$_}
- for grep {!/^-/} keys %$hash;
- return $clean_hash;
+ my ($self, $hash) = @_;
+ my $clean_hash = {};
+ $clean_hash->{$_} = $hash->{$_}
+ for grep {!/^-/} keys %$hash;
+ return $clean_hash;
}
sub _join_condition {
my ($self, $cond) = @_;
- die "no chance" unless ref $cond eq 'HASH';
- my %j;
- for (keys %$cond) { my $x = '= '.$self->_quote($cond->{$_}); $j{$_} = \$x; };
- return $self->_recurse_where(\%j);
+ if (ref $cond eq 'HASH') {
+ my %j;
+ for (keys %$cond) { my $x = '= '.$self->_quote($cond->{$_}); $j{$_} = \$x; };
+ return $self->_recurse_where(\%j);
+ } elsif (ref $cond eq 'ARRAY') {
+ return join(' OR ', map { $self->_join_condition($_) } @$cond);
+ } else {
+ die "Can't handle this yet!";
+ }
}
sub _quote {
my ($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;
- my $sth = $self->sth($sql);
+ 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 ${ident}" )
- unless ($self->_execute('insert' => [], $ident, $to_insert) > 0);
+ croak( "Couldn't insert ".join(', ', map "$_ => $to_insert->{$_}", keys %$to_insert)." into ${ident}" )
+ unless ($self->_execute('insert' => [], $ident, $to_insert));
return $to_insert;
}
if (ref $condition eq 'SCALAR') {
$order = $1 if $$condition =~ s/ORDER BY (.*)$//i;
}
+ if (exists $attrs->{group_by}) {
+ $order = { group_by => $attrs->{group_by},
+ ($order ? (order_by => $order) : ()) };
+ }
my @args = ('select', $attrs->{bind}, $ident, $select, $condition, $order);
if ($attrs->{software_limit} ||
$self->sql_maker->_default_limit_syntax eq "GenericSubQ") {
sub select {
my $self = shift;
my ($ident, $select, $condition, $attrs) = @_;
- my ($rv, $sth, @bind) = $self->_select(@_);
- return $self->cursor->new($sth, \@bind, $attrs);
+ 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;
+ $sth->finish();
+ return @row;
}
sub sth {
- shift->dbh->prepare(@_);
+ my ($self, $sql) = @_;
+ # 3 is the if_active parameter which avoids active sth re-use
+ return $self->dbh->prepare_cached($sql, {}, 3);
+}
+
+=head2 columns_info_for
+
+Returns database type info for a given table columns.
+
+=cut
+
+sub columns_info_for {
+ my ($self, $table) = @_;
+ my %result;
+ 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};
+ $result{$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];
+ }
+ }
+ 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