Commit | Line | Data |
3885cff6 |
1 | package DBIx::Class::Storage::DBI::Sybase; |
2 | |
3 | use strict; |
4 | use warnings; |
2ad62d97 |
5 | |
eabab5d0 |
6 | use base qw/ |
64f4e691 |
7 | DBIx::Class::Storage::DBI::Sybase::Base |
b0b44f97 |
8 | DBIx::Class::Storage::DBI |
eabab5d0 |
9 | /; |
2ad62d97 |
10 | use mro 'c3'; |
6b1f5ef7 |
11 | use Carp::Clan qw/^DBIx::Class/; |
12 | |
98259fe4 |
13 | =head1 NAME |
14 | |
15 | DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase |
16 | |
17 | =head1 SYNOPSIS |
18 | |
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>. |
22 | |
23 | =head1 DESCRIPTION |
24 | |
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. |
28 | |
29 | With this driver there is unfortunately no way to get the C<last_insert_id> |
30 | without doing a C<select max(col)>. |
31 | |
32 | But your queries will be cached. |
33 | |
8c4b6c50 |
34 | You need a version of L<DBD::Sybase> compiled with the Sybase OpenClient |
35 | libraries, B<NOT> FreeTDS, for placeholder support. Otherwise your storage will |
36 | be automatically reblessed into C<::NoBindVars>. |
5703eb14 |
37 | |
fd5a07e4 |
38 | A recommended L<DBIx::Class::Storage::DBI/connect_info> settings: |
98259fe4 |
39 | |
fd5a07e4 |
40 | on_connect_call => [['datetime_setup'], [blob_setup => log_on_update => 0]] |
98259fe4 |
41 | |
42 | =head1 METHODS |
43 | |
44 | =cut |
45 | |
fd5a07e4 |
46 | __PACKAGE__->mk_group_accessors('simple' => |
47 | qw/_blob_log_on_update/ |
48 | ); |
49 | |
47d9646a |
50 | sub _rebless { |
b50a5275 |
51 | my $self = shift; |
c5ce7cd6 |
52 | |
53 | if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') { |
54 | my $dbtype = eval { |
55 | @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2] |
56 | } || ''; |
57 | |
58 | my $exception = $@; |
59 | $dbtype =~ s/\W/_/gi; |
60 | my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}"; |
61 | |
62 | if (!$exception && $dbtype && $self->load_optional_class($subclass)) { |
63 | bless $self, $subclass; |
64 | $self->_rebless; |
5703eb14 |
65 | } else { # real Sybase |
66 | my $no_bind_vars = 'DBIx::Class::Storage::DBI::Sybase::NoBindVars'; |
67 | |
683f73ec |
68 | if (not $self->dbh->{syb_dynamic_supported}) { |
5703eb14 |
69 | $self->ensure_class_loaded($no_bind_vars); |
70 | bless $self, $no_bind_vars; |
71 | $self->_rebless; |
72 | } |
73 | |
8c4b6c50 |
74 | if ($self->_using_freetds) { |
5703eb14 |
75 | carp <<'EOF'; |
76 | |
77 | Your version of Sybase potentially supports placeholders and query caching, |
8c4b6c50 |
78 | however you seem to be using FreeTDS which does not (yet?) support this. |
5703eb14 |
79 | |
8c4b6c50 |
80 | Please recompile DBD::Sybase with the Sybase OpenClient libraries if you want |
81 | these features. |
82 | |
83 | TEXT/IMAGE column support will also not work under FreeTDS. |
5703eb14 |
84 | |
85 | See perldoc DBIx::Class::Storage::DBI::Sybase for more details. |
86 | EOF |
87 | $self->ensure_class_loaded($no_bind_vars); |
88 | bless $self, $no_bind_vars; |
683f73ec |
89 | $self->_rebless; |
90 | } |
41c93b1b |
91 | $self->_set_maxConnect; |
47d9646a |
92 | } |
c5ce7cd6 |
93 | } |
b50a5275 |
94 | } |
95 | |
8c4b6c50 |
96 | { |
97 | my $using_freetds = undef; |
98 | |
99 | sub _using_freetds { |
100 | my $self = shift; |
101 | my $dbh = $self->_dbh; |
102 | |
103 | return $using_freetds if defined $using_freetds; |
104 | |
65bab8da |
105 | # local $dbh->{syb_rowcount} = 1; # this is broken in freetds |
106 | # $using_freetds = @{ $dbh->selectall_arrayref('sp_help') } != 1; |
107 | |
108 | $using_freetds = $dbh->{syb_oc_version} =~ /freetds/i; |
8c4b6c50 |
109 | |
110 | return $using_freetds; |
111 | } |
112 | } |
113 | |
41c93b1b |
114 | sub _set_maxConnect { |
115 | my $self = shift; |
116 | |
117 | my $dsn = $self->_dbi_connect_info->[0]; |
118 | |
119 | return if ref($dsn) eq 'CODE'; |
120 | |
121 | if ($dsn !~ /maxConnect=/) { |
122 | $self->_dbi_connect_info->[0] = "$dsn;maxConnect=256"; |
41c93b1b |
123 | my $connected = defined $self->_dbh; |
124 | $self->disconnect; |
125 | $self->ensure_connected if $connected; |
126 | } |
127 | } |
128 | |
63d46bb3 |
129 | =head2 connect_call_blob_setup |
130 | |
131 | Used as: |
132 | |
fd5a07e4 |
133 | on_connect_call => [ [ blob_setup => log_on_update => 0 ] ] |
63d46bb3 |
134 | |
135 | Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary |
136 | instead of as a hex string. |
137 | |
6636ad53 |
138 | Recommended. |
139 | |
fd5a07e4 |
140 | Also sets the C<log_on_update> value for blob write operations. The default is |
141 | C<1>, but C<0> is better if your database is configured for it. |
142 | |
143 | See |
144 | L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>. |
145 | |
63d46bb3 |
146 | =cut |
147 | |
148 | sub connect_call_blob_setup { |
149 | my $self = shift; |
fd5a07e4 |
150 | my %args = @_; |
63d46bb3 |
151 | my $dbh = $self->_dbh; |
152 | $dbh->{syb_binary_images} = 1; |
fd5a07e4 |
153 | |
154 | $self->_blob_log_on_update($args{log_on_update}) |
155 | if exists $args{log_on_update}; |
156 | } |
157 | |
158 | sub _is_lob_type { |
159 | my $self = shift; |
5703eb14 |
160 | my $type = shift; |
078a332f |
161 | $type && $type =~ /(?:text|image|lob|bytea|binary|memo)/i; |
fd5a07e4 |
162 | } |
163 | |
b5453fbb |
164 | ## This will be useful if we ever implement BLOB filehandle inflation and will |
165 | ## need to use the API, but for now it isn't. |
5703eb14 |
166 | # |
b5453fbb |
167 | #sub order_columns_for_select { |
168 | # my ($self, $source) = @_; |
5703eb14 |
169 | # |
170 | # my (@non_blobs, @blobs); |
171 | # |
b5453fbb |
172 | # for my $col ($source->columns) { |
173 | # if ($self->_is_lob_type($source->column_info($col)->{data_type})) { |
5703eb14 |
174 | # push @blobs, $col; |
175 | # } else { |
176 | # push @non_blobs, $col; |
177 | # } |
178 | # } |
179 | # |
b5453fbb |
180 | # croak "cannot select more than a one TEXT/IMAGE column at a time" |
5703eb14 |
181 | # if @blobs > 1; |
182 | # |
b5453fbb |
183 | # return (@non_blobs, @blobs); |
5703eb14 |
184 | #} |
185 | |
186 | # override to handle TEXT/IMAGE |
fd5a07e4 |
187 | sub insert { |
7d17f469 |
188 | my ($self, $source, $to_insert) = splice @_, 0, 3; |
189 | |
190 | my $blob_cols = $self->_remove_blob_cols($source, $to_insert); |
191 | |
192 | my $updated_cols = $self->next::method($source, $to_insert, @_); |
193 | |
078a332f |
194 | $self->_insert_blobs($source, $blob_cols, $to_insert) if %$blob_cols; |
7d17f469 |
195 | |
196 | return $updated_cols; |
197 | } |
198 | |
078a332f |
199 | sub update { |
200 | my ($self, $source) = splice @_, 0, 2; |
201 | my ($fields, $where) = @_; |
202 | my $wantarray = wantarray; |
203 | |
204 | my $blob_cols = $self->_remove_blob_cols($source, $fields); |
205 | |
206 | my @res; |
207 | if ($wantarray) { |
208 | @res = $self->next::method($source, @_); |
209 | } else { |
210 | $res[0] = $self->next::method($source, @_); |
211 | } |
212 | |
213 | $self->_update_blobs($source, $blob_cols, $where) if %$blob_cols; |
214 | |
215 | return $wantarray ? @res : $res[0]; |
216 | } |
7d17f469 |
217 | |
218 | sub _remove_blob_cols { |
219 | my ($self, $source, $fields) = @_; |
fd5a07e4 |
220 | |
221 | my %blob_cols; |
222 | |
7d17f469 |
223 | for my $col (keys %$fields) { |
9b3dabe0 |
224 | if ($self->_is_lob_type($source->column_info($col)->{data_type})) { |
225 | $blob_cols{$col} = delete $fields->{$col}; |
226 | $fields->{$col} = \"''"; |
227 | } |
fd5a07e4 |
228 | } |
229 | |
7d17f469 |
230 | return \%blob_cols; |
fd5a07e4 |
231 | } |
232 | |
233 | sub _update_blobs { |
078a332f |
234 | my ($self, $source, $blob_cols, $where) = @_; |
235 | |
236 | my (@primary_cols) = $source->primary_columns; |
237 | |
238 | croak "Cannot update TEXT/IMAGE column(s) without a primary key" |
239 | unless @primary_cols; |
240 | |
241 | # check if we're updating a single row by PK |
242 | my $pk_cols_in_where = 0; |
243 | for my $col (@primary_cols) { |
244 | $pk_cols_in_where++ if defined $where->{$col}; |
245 | } |
246 | my @rows; |
247 | |
248 | if ($pk_cols_in_where == @primary_cols) { |
249 | my %row_to_update; |
250 | @row_to_update{@primary_cols} = @{$where}{@primary_cols}; |
251 | @rows = \%row_to_update; |
252 | } else { |
253 | my $rs = $source->resultset->search( |
254 | $where, |
255 | { |
256 | result_class => 'DBIx::Class::ResultClass::HashRefInflator', |
257 | select => \@primary_cols |
258 | } |
259 | ); |
260 | @rows = $rs->all; # statement must finish |
261 | } |
262 | |
263 | for my $row (@rows) { |
264 | $self->_insert_blobs($source, $blob_cols, $row); |
265 | } |
266 | } |
267 | |
268 | sub _insert_blobs { |
269 | my ($self, $source, $blob_cols, $row) = @_; |
fd5a07e4 |
270 | my $dbh = $self->dbh; |
271 | |
272 | my $table = $source->from; |
273 | |
078a332f |
274 | my %row = %$row; |
fd5a07e4 |
275 | my (@primary_cols) = $source->primary_columns; |
276 | |
9b3dabe0 |
277 | croak "Cannot update TEXT/IMAGE column(s) without a primary key" |
fd5a07e4 |
278 | unless @primary_cols; |
279 | |
078a332f |
280 | if ((grep { defined $row{$_} } @primary_cols) != @primary_cols) { |
9b3dabe0 |
281 | if (@primary_cols == 1) { |
282 | my $col = $primary_cols[0]; |
078a332f |
283 | $row{$col} = $self->last_insert_id($source, $col); |
9b3dabe0 |
284 | } else { |
285 | croak "Cannot update TEXT/IMAGE column(s) without primary key values"; |
286 | } |
287 | } |
fd5a07e4 |
288 | |
289 | for my $col (keys %$blob_cols) { |
290 | my $blob = $blob_cols->{$col}; |
9b3dabe0 |
291 | my $sth; |
fd5a07e4 |
292 | |
9b3dabe0 |
293 | if (not $self->isa('DBIx::Class::Storage::DBI::NoBindVars')) { |
294 | my $search_cond = join ',' => map "$_ = ?", @primary_cols; |
295 | |
296 | $sth = $self->sth( |
297 | "select $col from $table where $search_cond" |
298 | ); |
078a332f |
299 | $sth->execute(map $row{$_}, @primary_cols); |
9b3dabe0 |
300 | } else { |
078a332f |
301 | my $search_cond = join ',' => map "$_ = $row{$_}", @primary_cols; |
9b3dabe0 |
302 | |
303 | $sth = $dbh->prepare( |
304 | "select $col from $table where $search_cond" |
305 | ); |
306 | $sth->execute; |
307 | } |
fd5a07e4 |
308 | |
309 | eval { |
310 | while ($sth->fetch) { |
311 | $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr; |
312 | } |
313 | $sth->func('ct_prepare_send') or die $sth->errstr; |
314 | |
315 | my $log_on_update = $self->_blob_log_on_update; |
316 | $log_on_update = 1 if not defined $log_on_update; |
317 | |
318 | $sth->func('CS_SET', 1, { |
319 | total_txtlen => length($blob), |
320 | log_on_update => $log_on_update |
321 | }, 'ct_data_info') or die $sth->errstr; |
322 | |
323 | $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr; |
324 | |
325 | $sth->func('ct_finish_send') or die $sth->errstr; |
326 | }; |
327 | my $exception = $@; |
328 | $sth->finish; |
329 | croak $exception if $exception; |
330 | } |
63d46bb3 |
331 | } |
332 | |
9539eeb1 |
333 | =head2 connect_call_datetime_setup |
334 | |
335 | Used as: |
336 | |
337 | on_connect_call => 'datetime_setup' |
338 | |
339 | In L<DBIx::Class::Storage::DBI/connect_info> to set: |
340 | |
3abafb11 |
341 | $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z |
342 | $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080 |
9539eeb1 |
343 | |
344 | On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using |
3abafb11 |
345 | L<DateTime::Format::Sybase>, which you will need to install. |
346 | |
347 | This works for both C<DATETIME> and C<SMALLDATETIME> columns, although |
348 | C<SMALLDATETIME> columns only have minute precision. |
9539eeb1 |
349 | |
350 | =cut |
351 | |
9041a97a |
352 | { |
353 | my $old_dbd_warned = 0; |
354 | |
9539eeb1 |
355 | sub connect_call_datetime_setup { |
6b1f5ef7 |
356 | my $self = shift; |
6b1f5ef7 |
357 | my $dbh = $self->_dbh; |
358 | |
359 | if ($dbh->can('syb_date_fmt')) { |
360 | $dbh->syb_date_fmt('ISO_strict'); |
361 | } elsif (not $old_dbd_warned) { |
362 | carp "Your DBD::Sybase is too old to support ". |
363 | "DBIx::Class::InflateColumn::DateTime, please upgrade!"; |
364 | $old_dbd_warned = 1; |
365 | } |
366 | |
367 | $dbh->do('set dateformat mdy'); |
c5ce7cd6 |
368 | |
6b1f5ef7 |
369 | 1; |
c5ce7cd6 |
370 | } |
6b1f5ef7 |
371 | } |
372 | |
6636ad53 |
373 | sub datetime_parser_type { "DateTime::Format::Sybase" } |
374 | |
6b1f5ef7 |
375 | sub _dbh_last_insert_id { |
376 | my ($self, $dbh, $source, $col) = @_; |
c5ce7cd6 |
377 | |
378 | # sorry, there's no other way! |
23419345 |
379 | my $sth = $self->sth("select max($col) from ".$source->from); |
380 | my ($id) = $dbh->selectrow_array($sth); |
381 | $sth->finish; |
382 | |
383 | return $id; |
a964a928 |
384 | } |
385 | |
3885cff6 |
386 | 1; |
387 | |
41c93b1b |
388 | =head1 MAXIMUM CONNECTIONS |
389 | |
390 | L<DBD::Sybase> makes separate connections to the server for active statements in |
391 | the background. By default the number of such connections is limited to 25, on |
392 | both the client side and the server side. |
393 | |
394 | This is a bit too low, so on connection the clientside setting is set to C<256> |
395 | (see L<DBD::Sybase/maxConnect>.) You can override it to whatever setting you |
396 | like in the DSN. |
397 | |
398 | See |
399 | L<http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.ase_15.0.sag1/html/sag1/sag1272.htm> |
400 | for information on changing the setting on the server side. |
401 | |
c5ce7cd6 |
402 | =head1 DATES |
403 | |
3abafb11 |
404 | See L</connect_call_datetime_setup> to setup date formats |
405 | for L<DBIx::Class::InflateColumn::DateTime>. |
c5ce7cd6 |
406 | |
6636ad53 |
407 | =head1 IMAGE AND TEXT COLUMNS |
63d46bb3 |
408 | |
8c4b6c50 |
409 | L<DBD::Sybase> compiled with FreeTDS will B<NOT> work with C<TEXT/IMAGE> |
410 | columns. |
5703eb14 |
411 | |
63d46bb3 |
412 | See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info> |
413 | setting you need to work with C<IMAGE> columns. |
414 | |
3885cff6 |
415 | =head1 AUTHORS |
416 | |
7e8cecc1 |
417 | See L<DBIx::Class/CONTRIBUTORS>. |
c5ce7cd6 |
418 | |
3885cff6 |
419 | =head1 LICENSE |
420 | |
421 | You may distribute this code under the same terms as Perl itself. |
422 | |
423 | =cut |
c5ce7cd6 |
424 | # vim:sts=2 sw=2: |