use strict;
use warnings;
-
- use Class::C3;
- use base qw/DBIx::Class::Storage::DBI/;
-
+ use mro 'c3';
+ use base qw/
+ DBIx::Class::Storage::DBI::Sybase::Base
- DBIx::Class::Storage::DBI::NoBindVars
++ DBIx::Class::Storage::DBI
+ /;
+use Carp::Clan qw/^DBIx::Class/;
+
+=head1 NAME
+
+DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
+
+=head1 SYNOPSIS
+
+This subclass supports L<DBD::Sybase> for real Sybase databases. If you are
+using an MSSQL database via L<DBD::Sybase>, your storage will be reblessed to
+L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server>.
+
+=head1 DESCRIPTION
+
+If your version of Sybase does not support placeholders, then your storage
+will be reblessed to L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>. You can
+also enable that driver explicitly, see the documentation for more details.
+
+With this driver there is unfortunately no way to get the C<last_insert_id>
+without doing a C<select max(col)>.
+
+But your queries will be cached.
+
+A recommended L<DBIx::Class::Storage::DBI/connect_info> settings:
+
+ on_connect_call => [['datetime_setup'], [blob_setup => log_on_update => 0]]
+
+=head1 METHODS
+
+=cut
+
+__PACKAGE__->mk_group_accessors('simple' =>
+ qw/_blob_log_on_update/
+);
sub _rebless {
+ my $self = shift;
+
+ if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') {
+ my $dbtype = eval {
+ @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2]
+ } || '';
+
+ my $exception = $@;
+ $dbtype =~ s/\W/_/gi;
+ my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}";
+
+ if (!$exception && $dbtype && $self->load_optional_class($subclass)) {
+ bless $self, $subclass;
+ $self->_rebless;
+ } else {
+ # real Sybase
+ if (not $self->dbh->{syb_dynamic_supported}) {
+ bless $self, 'DBIx::Class::Storage:DBI::Sybase::NoBindVars';
+ $self->_rebless;
+ }
+ }
+ }
+}
+
+=head2 connect_call_blob_setup
+
+Used as:
+
+ on_connect_call => [ [ blob_setup => log_on_update => 0 ] ]
+
+Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary
+instead of as a hex string.
+
+Recommended.
+
+Also sets the C<log_on_update> value for blob write operations. The default is
+C<1>, but C<0> is better if your database is configured for it.
+
+See
+L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>.
+
+=cut
+
+sub connect_call_blob_setup {
+ my $self = shift;
+ my %args = @_;
+ my $dbh = $self->_dbh;
+ $dbh->{syb_binary_images} = 1;
+
+ $self->_blob_log_on_update($args{log_on_update})
+ if exists $args{log_on_update};
+}
+
+sub _is_lob_type {
+ my $self = shift;
+ shift =~ /(?:text|image|lob|bytea|binary)/i;
+}
+
+sub insert {
+ my ($self, $source, $to_insert) = splice @_, 0, 3;
+
+ my $blob_cols = $self->_remove_blob_cols($source, $to_insert);
+
+ my $updated_cols = $self->next::method($source, $to_insert, @_);
+
+ $self->_update_blobs($source, $blob_cols, $to_insert) if %$blob_cols;
+
+ return $updated_cols;
+}
+
+#sub update {
+# my ($self, $source) = splice @_, 0, 2;
+# my ($fields) = @_;
+#
+# my $blob_cols = $self->_remove_blob_cols($source, $fields);
+#
+# my @res = 1;
+#
+# if (%$fields) {
+# if (wantarray) {
+# @res = $self->next::method($source, @_);
+# } else {
+# $res[0] = $self->next::method($source, @_);
+# }
+# }
+#
+# $self->_update_blobs($source, $blob_cols, $fields) if %$blob_cols;
+#
+# return wantarray ? @res : $res[0];
+#}
+
+sub _remove_blob_cols {
+ my ($self, $source, $fields) = @_;
+
+ my %blob_cols;
+
+ for my $col (keys %$fields) {
+ $blob_cols{$col} = delete $fields->{$col}
+ if $self->_is_lob_type($source->column_info($col)->{data_type});
+ }
+
+ return \%blob_cols;
+}
+
+sub _update_blobs {
+ my ($self, $source, $blob_cols, $inserted) = @_;
+ my $dbh = $self->dbh;
+
+ my $table = $source->from;
+
+ my (@primary_cols) = $source->primary_columns;
+
+ croak "Cannot update TEXT/IMAGE without a primary key!"
+ unless @primary_cols;
+
+ my $search_cond = join ',' => map "$_ = ?", @primary_cols;
+
+ for my $col (keys %$blob_cols) {
+ my $blob = $blob_cols->{$col};
+
+# First update to empty string in case it's NULL, can't update a NULL blob using
+# the API.
+ my $sth = $dbh->prepare_cached(
+ qq{update $table set $col = '' where $search_cond}
+ );
+ $sth->execute(map $inserted->{$_}, @primary_cols) or die $sth->errstr;
+ $sth->finish;
+
+ $sth = $dbh->prepare_cached(
+ "select $col from $table where $search_cond"
+ );
+ $sth->execute(map $inserted->{$_}, @primary_cols);
+
+ eval {
+ while ($sth->fetch) {
+ $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr;
+ }
+ $sth->func('ct_prepare_send') or die $sth->errstr;
+
+ my $log_on_update = $self->_blob_log_on_update;
+ $log_on_update = 1 if not defined $log_on_update;
+
+ $sth->func('CS_SET', 1, {
+ total_txtlen => length($blob),
+ log_on_update => $log_on_update
+ }, 'ct_data_info') or die $sth->errstr;
+
+ $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr;
+
+ $sth->func('ct_finish_send') or die $sth->errstr;
+ };
+ my $exception = $@;
+ $sth->finish;
+ croak $exception if $exception;
+ }
+}
+
+=head2 connect_call_datetime_setup
+
+Used as:
+
+ on_connect_call => 'datetime_setup'
+
+In L<DBIx::Class::Storage::DBI/connect_info> to set:
+
+ $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z
+ $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080
+
+On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using
+L<DateTime::Format::Sybase>, which you will need to install.
+
+This works for both C<DATETIME> and C<SMALLDATETIME> columns, although
+C<SMALLDATETIME> columns only have minute precision.
+
+=cut
+
+{
+ my $old_dbd_warned = 0;
+
+ sub connect_call_datetime_setup {
my $self = shift;
+ my $dbh = $self->_dbh;
- my $dbtype = eval { @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2] };
- unless ( $@ ) {
- $dbtype =~ s/\W/_/gi;
- my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}";
- if ($self->load_optional_class($subclass) && !$self->isa($subclass)) {
- bless $self, $subclass;
- $self->_rebless;
- }
+ if ($dbh->can('syb_date_fmt')) {
+ $dbh->syb_date_fmt('ISO_strict');
+ } elsif (not $old_dbd_warned) {
+ carp "Your DBD::Sybase is too old to support ".
+ "DBIx::Class::InflateColumn::DateTime, please upgrade!";
+ $old_dbd_warned = 1;
}
+
+ $dbh->do('set dateformat mdy');
+
+ 1;
+ }
}
+sub datetime_parser_type { "DateTime::Format::Sybase" }
+
sub _dbh_last_insert_id {
- my ($self, $dbh, $source, $col) = @_;
- return ($dbh->selectrow_array('select @@identity'))[0];
+ my ($self, $dbh, $source, $col) = @_;
+
+ # sorry, there's no other way!
+ my $sth = $dbh->prepare_cached("select max($col) from ".$source->from);
+ return ($dbh->selectrow_array($sth))[0];
}
-1;
+# previous implementation of limited count for Sybase, does not include
+# count_grouped.
-=head1 NAME
+#sub _copy_attributes_for_count {
+# my ($self, $source, $attrs) = @_;
+# my %attrs = %$attrs;
+#
+# # take off any column specs, any pagers, record_filter is cdbi, and no point of ordering a count
+# delete @attrs{qw/select as rows offset page order_by record_filter/};
+#
+# return \%attrs;
+#}
+#
+#=head2 count
+#
+#Counts for limited queries are emulated by executing select queries and
+#returning the number of successful executions minus the offset.
+#
+#This is necessary due to the limitations of Sybase.
+#
+#=cut
+#
+#sub count {
+# my $self = shift;
+# my ($source, $attrs) = @_;
+#
+# my $new_attrs = $self->_copy_attributes_for_count($source, $attrs);
+#
+# if (exists $attrs->{rows}) {
+# my $offset = $attrs->{offset} || 0;
+# my $total = $attrs->{rows} + $offset;
+#
+# my $first_pk = ($source->primary_columns)[0];
+#
+# $new_attrs->{select} = $first_pk ? "me.$first_pk" : 1;
+#
+# my $tmp_rs = $source->resultset_class->new($source, $new_attrs);
+#
+# $self->dbh->{syb_rowcount} = $total;
+#
+# my $count = 0;
+# $count++ while $tmp_rs->cursor->next;
+#
+# $self->dbh->{syb_rowcount} = 0;
+#
+# return $count - $offset;
+# } else {
+# # overwrite the selector
+# $new_attrs->{select} = { count => '*' };
+#
+# my $tmp_rs = $source->resultset_class->new($source, $new_attrs);
+# my ($count) = $tmp_rs->cursor->next;
+#
+# # if the offset/rows attributes are still present, we did not use
+# # a subquery, so we need to make the calculations in software
+# $count -= $attrs->{offset} if $attrs->{offset};
+# $count = $attrs->{rows} if $attrs->{rows} and $attrs->{rows} < $count;
+# $count = 0 if ($count < 0);
+#
+# return $count;
+# }
+#}
-DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
+1;
-=head1 SYNOPSIS
+=head1 DATES
-This subclass supports L<DBD::Sybase> for real Sybase databases. If
-you are using an MSSQL database via L<DBD::Sybase>, see
-L<DBIx::Class::Storage::DBI::Sybase::MSSQL>.
+See L</connect_call_datetime_setup> to setup date formats
+for L<DBIx::Class::InflateColumn::DateTime>.
-=head1 CAVEATS
+=head1 IMAGE AND TEXT COLUMNS
-This storage driver uses L<DBIx::Class::Storage::DBI::NoBindVars> as a base.
-This means that bind variables will be interpolated (properly quoted of course)
-into the SQL query itself, without using bind placeholders.
+See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info>
+setting you need to work with C<IMAGE> columns.
-More importantly this means that caching of prepared statements is explicitly
-disabled, as the interpolation renders it useless.
+Due to limitations in L<DBD::Sybase> and this driver, it is only possible to
+select one C<TEXT> or C<IMAGE> column at a time.
=head1 AUTHORS
projects / dbsrgits/DBIx-Class.git / commitdiff