1 package DBIx::Class::Storage::DBI::Sybase;
7 DBIx::Class::Storage::DBI::Sybase::Base
8 DBIx::Class::Storage::DBI
11 use Carp::Clan qw/^DBIx::Class/;
15 DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase
19 This subclass supports L<DBD::Sybase> for real Sybase databases. If you are
20 using an MSSQL database via L<DBD::Sybase>, your storage will be reblessed to
21 L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server>.
25 If your version of Sybase does not support placeholders, then your storage
26 will be reblessed to L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>. You can
27 also enable that driver explicitly, see the documentation for more details.
29 With this driver there is unfortunately no way to get the C<last_insert_id>
30 without doing a C<select max(col)>.
32 But your queries will be cached.
34 You need at least version C<1.09> of L<DBD::Sybase> for placeholder support.
35 Otherwise your storage will be automatically reblessed into C<::NoBindVars>.
37 A recommended L<DBIx::Class::Storage::DBI/connect_info> settings:
39 on_connect_call => [['datetime_setup'], [blob_setup => log_on_update => 0]]
45 __PACKAGE__->mk_group_accessors('simple' =>
46 qw/_blob_log_on_update/
52 if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') {
54 @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2]
59 my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}";
61 if (!$exception && $dbtype && $self->load_optional_class($subclass)) {
62 bless $self, $subclass;
64 } else { # real Sybase
65 my $no_bind_vars = 'DBIx::Class::Storage::DBI::Sybase::NoBindVars';
67 if (not $self->dbh->{syb_dynamic_supported}) {
68 $self->ensure_class_loaded($no_bind_vars);
69 bless $self, $no_bind_vars;
73 if ($DBD::Sybase::VERSION < 1.09) {
76 Your version of Sybase potentially supports placeholders and query caching,
77 however your version of DBD::Sybase is too old to do this properly. Please
78 upgrade to at least version 1.09 if you want this feature.
80 TEXT/IMAGE column support will also not work in older versions of DBD::Sybase.
82 See perldoc DBIx::Class::Storage::DBI::Sybase for more details.
84 $self->ensure_class_loaded($no_bind_vars);
85 bless $self, $no_bind_vars;
88 $self->_set_maxConnect;
96 my $dsn = $self->_dbi_connect_info->[0];
98 return if ref($dsn) eq 'CODE';
100 if ($dsn !~ /maxConnect=/) {
101 $self->_dbi_connect_info->[0] = "$dsn;maxConnect=256";
102 my $connected = defined $self->_dbh;
104 $self->ensure_connected if $connected;
108 =head2 connect_call_blob_setup
112 on_connect_call => [ [ blob_setup => log_on_update => 0 ] ]
114 Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary
115 instead of as a hex string.
119 Also sets the C<log_on_update> value for blob write operations. The default is
120 C<1>, but C<0> is better if your database is configured for it.
123 L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>.
127 sub connect_call_blob_setup {
130 my $dbh = $self->_dbh;
131 $dbh->{syb_binary_images} = 1;
133 $self->_blob_log_on_update($args{log_on_update})
134 if exists $args{log_on_update};
140 $type && $type =~ /(?:text|image|lob|bytea|binary)/i;
143 ## This will be useful if we ever implement BLOB filehandle inflation and will
144 ## need to use the API, but for now it isn't.
146 #sub order_columns_for_select {
147 # my ($self, $source) = @_;
149 # my (@non_blobs, @blobs);
151 # for my $col ($source->columns) {
152 # if ($self->_is_lob_type($source->column_info($col)->{data_type})) {
155 # push @non_blobs, $col;
159 # croak "cannot select more than a one TEXT/IMAGE column at a time"
162 # return (@non_blobs, @blobs);
165 # override to handle TEXT/IMAGE
167 my ($self, $source, $to_insert) = splice @_, 0, 3;
169 my $blob_cols = $self->_remove_blob_cols($source, $to_insert);
171 my $updated_cols = $self->next::method($source, $to_insert, @_);
173 $self->_update_blobs($source, $blob_cols, $to_insert) if %$blob_cols;
175 return $updated_cols;
179 # my ($self, $source) = splice @_, 0, 2;
182 # my $blob_cols = $self->_remove_blob_cols($source, $fields);
188 # @res = $self->next::method($source, @_);
190 # $res[0] = $self->next::method($source, @_);
194 # $self->_update_blobs($source, $blob_cols, $fields) if %$blob_cols;
196 # return wantarray ? @res : $res[0];
199 sub _remove_blob_cols {
200 my ($self, $source, $fields) = @_;
204 for my $col (keys %$fields) {
205 if ($self->_is_lob_type($source->column_info($col)->{data_type})) {
206 $blob_cols{$col} = delete $fields->{$col};
207 $fields->{$col} = \"''";
215 my ($self, $source, $blob_cols, $inserted) = @_;
216 my $dbh = $self->dbh;
218 my $table = $source->from;
220 my %inserted = %$inserted;
221 my (@primary_cols) = $source->primary_columns;
223 croak "Cannot update TEXT/IMAGE column(s) without a primary key"
224 unless @primary_cols;
226 if ((grep { defined $inserted{$_} } @primary_cols) != @primary_cols) {
227 if (@primary_cols == 1) {
228 my $col = $primary_cols[0];
229 $inserted{$col} = $self->last_insert_id($source, $col);
231 croak "Cannot update TEXT/IMAGE column(s) without primary key values";
235 for my $col (keys %$blob_cols) {
236 my $blob = $blob_cols->{$col};
239 if (not $self->isa('DBIx::Class::Storage::DBI::NoBindVars')) {
240 my $search_cond = join ',' => map "$_ = ?", @primary_cols;
243 "select $col from $table where $search_cond"
245 $sth->execute(map $inserted{$_}, @primary_cols);
247 my $search_cond = join ',' => map "$_ = $inserted{$_}", @primary_cols;
249 $sth = $dbh->prepare(
250 "select $col from $table where $search_cond"
256 while ($sth->fetch) {
257 $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr;
259 $sth->func('ct_prepare_send') or die $sth->errstr;
261 my $log_on_update = $self->_blob_log_on_update;
262 $log_on_update = 1 if not defined $log_on_update;
264 $sth->func('CS_SET', 1, {
265 total_txtlen => length($blob),
266 log_on_update => $log_on_update
267 }, 'ct_data_info') or die $sth->errstr;
269 $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr;
271 $sth->func('ct_finish_send') or die $sth->errstr;
275 croak $exception if $exception;
279 =head2 connect_call_datetime_setup
283 on_connect_call => 'datetime_setup'
285 In L<DBIx::Class::Storage::DBI/connect_info> to set:
287 $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z
288 $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080
290 On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using
291 L<DateTime::Format::Sybase>, which you will need to install.
293 This works for both C<DATETIME> and C<SMALLDATETIME> columns, although
294 C<SMALLDATETIME> columns only have minute precision.
299 my $old_dbd_warned = 0;
301 sub connect_call_datetime_setup {
303 my $dbh = $self->_dbh;
305 if ($dbh->can('syb_date_fmt')) {
306 $dbh->syb_date_fmt('ISO_strict');
307 } elsif (not $old_dbd_warned) {
308 carp "Your DBD::Sybase is too old to support ".
309 "DBIx::Class::InflateColumn::DateTime, please upgrade!";
313 $dbh->do('set dateformat mdy');
319 sub datetime_parser_type { "DateTime::Format::Sybase" }
321 sub _dbh_last_insert_id {
322 my ($self, $dbh, $source, $col) = @_;
324 # sorry, there's no other way!
325 my $sth = $dbh->prepare_cached("select max($col) from ".$source->from);
326 return ($dbh->selectrow_array($sth))[0];
331 =head1 MAXIMUM CONNECTIONS
333 L<DBD::Sybase> makes separate connections to the server for active statements in
334 the background. By default the number of such connections is limited to 25, on
335 both the client side and the server side.
337 This is a bit too low, so on connection the clientside setting is set to C<256>
338 (see L<DBD::Sybase/maxConnect>.) You can override it to whatever setting you
342 L<http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.ase_15.0.sag1/html/sag1/sag1272.htm>
343 for information on changing the setting on the server side.
347 See L</connect_call_datetime_setup> to setup date formats
348 for L<DBIx::Class::InflateColumn::DateTime>.
350 =head1 IMAGE AND TEXT COLUMNS
352 You need at least version C<1.09> of L<DBD::Sybase> for C<TEXT/IMAGE> column
355 See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info>
356 setting you need to work with C<IMAGE> columns.
358 Due to limitations in L<DBD::Sybase> and this driver, it is only possible to
359 select one C<TEXT> or C<IMAGE> column at a time. This is handled automatically
360 for tables with only one such column, if you have more than one, supply a
361 C<< select => [qw/col list .../] >> key to your C<< ->search >> calls, with the
362 single desired C<TEXT/IMAGE> column at the end of the list.
366 See L<DBIx::Class/CONTRIBUTORS>.
370 You may distribute this code under the same terms as Perl itself.