1 package DBIx::Class::Storage::DBI::Sybase;
7 use base qw/DBIx::Class::Storage::DBI/;
9 use Carp::Clan qw/^DBIx::Class/;
13 DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
17 This subclass supports L<DBD::Sybase> for real Sybase databases. If you are
18 using an MSSQL database via L<DBD::Sybase>, your storage will be reblessed to
19 L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server>.
23 If your version of Sybase does not support placeholders, then your storage
24 will be reblessed to L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>. You can
25 also enable that driver explicitly, see the documentation for more details.
27 With this driver there is unfortunately no way to get the C<last_insert_id>
28 without doing a C<select max(col)>.
30 But your queries will be cached.
32 A recommended L<DBIx::Class::Storage::DBI/connect_info> settings:
34 on_connect_call => [['datetime_setup'], [blob_setup => log_on_update => 0]]
40 __PACKAGE__->mk_group_accessors('simple' =>
41 qw/_blob_log_on_update/
47 if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') {
49 @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2]
54 my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}";
56 if (!$exception && $dbtype && $self->load_optional_class($subclass)) {
57 bless $self, $subclass;
61 if (not $self->dbh->{syb_dynamic_supported}) {
62 bless $self, 'DBIx::Class::Storage:DBI::Sybase::NoBindVars';
69 =head2 connect_call_blob_setup
73 on_connect_call => [ [ blob_setup => log_on_update => 0 ] ]
75 Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary
76 instead of as a hex string.
80 Also sets the C<log_on_update> value for blob write operations. The default is
81 C<1>, but C<0> is better if your database is configured for it.
84 L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>.
88 sub connect_call_blob_setup {
91 my $dbh = $self->_dbh;
92 $dbh->{syb_binary_images} = 1;
94 $self->_blob_log_on_update($args{log_on_update})
95 if exists $args{log_on_update};
100 shift =~ /(?:text|image|lob|bytea|binary)/i;
105 my ($source, $to_insert) = @_;
109 for my $col (keys %$to_insert) {
110 $blob_cols{$col} = delete $to_insert->{$col}
111 if $self->_is_lob_type($source->column_info($col)->{data_type});
114 my $updated_cols = $self->next::method(@_);
116 $self->_update_blobs($source, \%blob_cols, $to_insert) if %blob_cols;
118 return $updated_cols;
122 my ($self, $source, $blob_cols, $inserted) = @_;
123 my $dbh = $self->dbh;
125 my $table = $source->from;
127 my (@primary_cols) = $source->primary_columns;
129 croak "Cannot update TEXT/IMAGE without a primary key!"
130 unless @primary_cols;
132 my $search_cond = join ',' => map "$_ = ?", @primary_cols;
134 for my $col (keys %$blob_cols) {
135 my $blob = $blob_cols->{$col};
137 # First update to empty string in case it's NULL, can't update a NULL blob using
139 my $sth = $dbh->prepare_cached(
140 qq{update $table set $col = '' where $search_cond}
142 $sth->execute(map $inserted->{$_}, @primary_cols) or die $sth->errstr;
145 $sth = $dbh->prepare_cached(
146 "select $col from $table where $search_cond"
148 $sth->execute(map $inserted->{$_}, @primary_cols);
151 while ($sth->fetch) {
152 $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr;
154 $sth->func('ct_prepare_send') or die $sth->errstr;
156 my $log_on_update = $self->_blob_log_on_update;
157 $log_on_update = 1 if not defined $log_on_update;
159 $sth->func('CS_SET', 1, {
160 total_txtlen => length($blob),
161 log_on_update => $log_on_update
162 }, 'ct_data_info') or die $sth->errstr;
164 $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr;
166 $sth->func('ct_finish_send') or die $sth->errstr;
170 croak $exception if $exception;
174 =head2 connect_call_datetime_setup
178 on_connect_call => 'datetime_setup'
180 In L<DBIx::Class::Storage::DBI/connect_info> to set:
182 $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z
183 $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080
185 On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using
186 L<DateTime::Format::Sybase>, which you will need to install.
188 This works for both C<DATETIME> and C<SMALLDATETIME> columns, although
189 C<SMALLDATETIME> columns only have minute precision.
194 my $old_dbd_warned = 0;
196 sub connect_call_datetime_setup {
198 my $dbh = $self->_dbh;
200 if ($dbh->can('syb_date_fmt')) {
201 $dbh->syb_date_fmt('ISO_strict');
202 } elsif (not $old_dbd_warned) {
203 carp "Your DBD::Sybase is too old to support ".
204 "DBIx::Class::InflateColumn::DateTime, please upgrade!";
208 $dbh->do('set dateformat mdy');
214 sub datetime_parser_type { "DateTime::Format::Sybase" }
216 sub _dbh_last_insert_id {
217 my ($self, $dbh, $source, $col) = @_;
219 # sorry, there's no other way!
220 my $sth = $dbh->prepare_cached("select max($col) from ".$source->from);
221 return ($dbh->selectrow_array($sth))[0];
224 # previous implementation of limited count for Sybase, does not include
227 #sub _copy_attributes_for_count {
228 # my ($self, $source, $attrs) = @_;
229 # my %attrs = %$attrs;
231 # # take off any column specs, any pagers, record_filter is cdbi, and no point of ordering a count
232 # delete @attrs{qw/select as rows offset page order_by record_filter/};
239 #Counts for limited queries are emulated by executing select queries and
240 #returning the number of successful executions minus the offset.
242 #This is necessary due to the limitations of Sybase.
248 # my ($source, $attrs) = @_;
250 # my $new_attrs = $self->_copy_attributes_for_count($source, $attrs);
252 # if (exists $attrs->{rows}) {
253 # my $offset = $attrs->{offset} || 0;
254 # my $total = $attrs->{rows} + $offset;
256 # my $first_pk = ($source->primary_columns)[0];
258 # $new_attrs->{select} = $first_pk ? "me.$first_pk" : 1;
260 # my $tmp_rs = $source->resultset_class->new($source, $new_attrs);
262 # $self->dbh->{syb_rowcount} = $total;
265 # $count++ while $tmp_rs->cursor->next;
267 # $self->dbh->{syb_rowcount} = 0;
269 # return $count - $offset;
271 # # overwrite the selector
272 # $new_attrs->{select} = { count => '*' };
274 # my $tmp_rs = $source->resultset_class->new($source, $new_attrs);
275 # my ($count) = $tmp_rs->cursor->next;
277 # # if the offset/rows attributes are still present, we did not use
278 # # a subquery, so we need to make the calculations in software
279 # $count -= $attrs->{offset} if $attrs->{offset};
280 # $count = $attrs->{rows} if $attrs->{rows} and $attrs->{rows} < $count;
281 # $count = 0 if ($count < 0);
291 See L</connect_call_datetime_setup> to setup date formats
292 for L<DBIx::Class::InflateColumn::DateTime>.
294 =head1 IMAGE AND TEXT COLUMNS
296 See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info>
297 setting you need to work with C<IMAGE> columns.
299 Due to limitations in L<DBD::Sybase> and this driver, it is only possible to
300 select one C<TEXT> or C<IMAGE> column at a time.
304 See L<DBIx::Class/CONTRIBUTORS>.
308 You may distribute this code under the same terms as Perl itself.