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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 | |
5703eb14 |
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>. |
36 | |
fd5a07e4 |
37 | A recommended L<DBIx::Class::Storage::DBI/connect_info> settings: |
98259fe4 |
38 | |
fd5a07e4 |
39 | on_connect_call => [['datetime_setup'], [blob_setup => log_on_update => 0]] |
98259fe4 |
40 | |
41 | =head1 METHODS |
42 | |
43 | =cut |
44 | |
fd5a07e4 |
45 | __PACKAGE__->mk_group_accessors('simple' => |
46 | qw/_blob_log_on_update/ |
47 | ); |
48 | |
47d9646a |
49 | sub _rebless { |
b50a5275 |
50 | my $self = shift; |
c5ce7cd6 |
51 | |
52 | if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') { |
53 | my $dbtype = eval { |
54 | @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2] |
55 | } || ''; |
56 | |
57 | my $exception = $@; |
58 | $dbtype =~ s/\W/_/gi; |
59 | my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}"; |
60 | |
61 | if (!$exception && $dbtype && $self->load_optional_class($subclass)) { |
62 | bless $self, $subclass; |
63 | $self->_rebless; |
5703eb14 |
64 | } else { # real Sybase |
65 | my $no_bind_vars = 'DBIx::Class::Storage::DBI::Sybase::NoBindVars'; |
66 | |
683f73ec |
67 | if (not $self->dbh->{syb_dynamic_supported}) { |
5703eb14 |
68 | $self->ensure_class_loaded($no_bind_vars); |
69 | bless $self, $no_bind_vars; |
70 | $self->_rebless; |
71 | } |
72 | |
73 | if ($DBD::Sybase::VERSION < 1.09) { |
74 | carp <<'EOF'; |
75 | |
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. |
79 | |
80 | TEXT/IMAGE column support will also not work in older versions of DBD::Sybase. |
81 | |
82 | See perldoc DBIx::Class::Storage::DBI::Sybase for more details. |
83 | EOF |
84 | $self->ensure_class_loaded($no_bind_vars); |
85 | bless $self, $no_bind_vars; |
683f73ec |
86 | $self->_rebless; |
87 | } |
41c93b1b |
88 | $self->_set_maxConnect; |
47d9646a |
89 | } |
c5ce7cd6 |
90 | } |
b50a5275 |
91 | } |
92 | |
41c93b1b |
93 | sub _set_maxConnect { |
94 | my $self = shift; |
95 | |
96 | my $dsn = $self->_dbi_connect_info->[0]; |
97 | |
98 | return if ref($dsn) eq 'CODE'; |
99 | |
100 | if ($dsn !~ /maxConnect=/) { |
101 | $self->_dbi_connect_info->[0] = "$dsn;maxConnect=256"; |
41c93b1b |
102 | my $connected = defined $self->_dbh; |
103 | $self->disconnect; |
104 | $self->ensure_connected if $connected; |
105 | } |
106 | } |
107 | |
63d46bb3 |
108 | =head2 connect_call_blob_setup |
109 | |
110 | Used as: |
111 | |
fd5a07e4 |
112 | on_connect_call => [ [ blob_setup => log_on_update => 0 ] ] |
63d46bb3 |
113 | |
114 | Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary |
115 | instead of as a hex string. |
116 | |
6636ad53 |
117 | Recommended. |
118 | |
fd5a07e4 |
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. |
121 | |
122 | See |
123 | L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>. |
124 | |
63d46bb3 |
125 | =cut |
126 | |
127 | sub connect_call_blob_setup { |
128 | my $self = shift; |
fd5a07e4 |
129 | my %args = @_; |
63d46bb3 |
130 | my $dbh = $self->_dbh; |
131 | $dbh->{syb_binary_images} = 1; |
fd5a07e4 |
132 | |
133 | $self->_blob_log_on_update($args{log_on_update}) |
134 | if exists $args{log_on_update}; |
135 | } |
136 | |
137 | sub _is_lob_type { |
138 | my $self = shift; |
5703eb14 |
139 | my $type = shift; |
078a332f |
140 | $type && $type =~ /(?:text|image|lob|bytea|binary|memo)/i; |
fd5a07e4 |
141 | } |
142 | |
b5453fbb |
143 | ## This will be useful if we ever implement BLOB filehandle inflation and will |
144 | ## need to use the API, but for now it isn't. |
5703eb14 |
145 | # |
b5453fbb |
146 | #sub order_columns_for_select { |
147 | # my ($self, $source) = @_; |
5703eb14 |
148 | # |
149 | # my (@non_blobs, @blobs); |
150 | # |
b5453fbb |
151 | # for my $col ($source->columns) { |
152 | # if ($self->_is_lob_type($source->column_info($col)->{data_type})) { |
5703eb14 |
153 | # push @blobs, $col; |
154 | # } else { |
155 | # push @non_blobs, $col; |
156 | # } |
157 | # } |
158 | # |
b5453fbb |
159 | # croak "cannot select more than a one TEXT/IMAGE column at a time" |
5703eb14 |
160 | # if @blobs > 1; |
161 | # |
b5453fbb |
162 | # return (@non_blobs, @blobs); |
5703eb14 |
163 | #} |
164 | |
165 | # override to handle TEXT/IMAGE |
fd5a07e4 |
166 | sub insert { |
7d17f469 |
167 | my ($self, $source, $to_insert) = splice @_, 0, 3; |
168 | |
169 | my $blob_cols = $self->_remove_blob_cols($source, $to_insert); |
170 | |
171 | my $updated_cols = $self->next::method($source, $to_insert, @_); |
172 | |
078a332f |
173 | $self->_insert_blobs($source, $blob_cols, $to_insert) if %$blob_cols; |
7d17f469 |
174 | |
175 | return $updated_cols; |
176 | } |
177 | |
078a332f |
178 | sub update { |
179 | my ($self, $source) = splice @_, 0, 2; |
180 | my ($fields, $where) = @_; |
181 | my $wantarray = wantarray; |
182 | |
183 | my $blob_cols = $self->_remove_blob_cols($source, $fields); |
184 | |
185 | my @res; |
186 | if ($wantarray) { |
187 | @res = $self->next::method($source, @_); |
188 | } else { |
189 | $res[0] = $self->next::method($source, @_); |
190 | } |
191 | |
192 | $self->_update_blobs($source, $blob_cols, $where) if %$blob_cols; |
193 | |
194 | return $wantarray ? @res : $res[0]; |
195 | } |
7d17f469 |
196 | |
197 | sub _remove_blob_cols { |
198 | my ($self, $source, $fields) = @_; |
fd5a07e4 |
199 | |
200 | my %blob_cols; |
201 | |
7d17f469 |
202 | for my $col (keys %$fields) { |
9b3dabe0 |
203 | if ($self->_is_lob_type($source->column_info($col)->{data_type})) { |
204 | $blob_cols{$col} = delete $fields->{$col}; |
205 | $fields->{$col} = \"''"; |
206 | } |
fd5a07e4 |
207 | } |
208 | |
7d17f469 |
209 | return \%blob_cols; |
fd5a07e4 |
210 | } |
211 | |
212 | sub _update_blobs { |
078a332f |
213 | my ($self, $source, $blob_cols, $where) = @_; |
214 | |
215 | my (@primary_cols) = $source->primary_columns; |
216 | |
217 | croak "Cannot update TEXT/IMAGE column(s) without a primary key" |
218 | unless @primary_cols; |
219 | |
220 | # check if we're updating a single row by PK |
221 | my $pk_cols_in_where = 0; |
222 | for my $col (@primary_cols) { |
223 | $pk_cols_in_where++ if defined $where->{$col}; |
224 | } |
225 | my @rows; |
226 | |
227 | if ($pk_cols_in_where == @primary_cols) { |
228 | my %row_to_update; |
229 | @row_to_update{@primary_cols} = @{$where}{@primary_cols}; |
230 | @rows = \%row_to_update; |
231 | } else { |
232 | my $rs = $source->resultset->search( |
233 | $where, |
234 | { |
235 | result_class => 'DBIx::Class::ResultClass::HashRefInflator', |
236 | select => \@primary_cols |
237 | } |
238 | ); |
239 | @rows = $rs->all; # statement must finish |
240 | } |
241 | |
242 | for my $row (@rows) { |
243 | $self->_insert_blobs($source, $blob_cols, $row); |
244 | } |
245 | } |
246 | |
247 | sub _insert_blobs { |
248 | my ($self, $source, $blob_cols, $row) = @_; |
fd5a07e4 |
249 | my $dbh = $self->dbh; |
250 | |
251 | my $table = $source->from; |
252 | |
078a332f |
253 | my %row = %$row; |
fd5a07e4 |
254 | my (@primary_cols) = $source->primary_columns; |
255 | |
9b3dabe0 |
256 | croak "Cannot update TEXT/IMAGE column(s) without a primary key" |
fd5a07e4 |
257 | unless @primary_cols; |
258 | |
078a332f |
259 | if ((grep { defined $row{$_} } @primary_cols) != @primary_cols) { |
9b3dabe0 |
260 | if (@primary_cols == 1) { |
261 | my $col = $primary_cols[0]; |
078a332f |
262 | $row{$col} = $self->last_insert_id($source, $col); |
9b3dabe0 |
263 | } else { |
264 | croak "Cannot update TEXT/IMAGE column(s) without primary key values"; |
265 | } |
266 | } |
fd5a07e4 |
267 | |
268 | for my $col (keys %$blob_cols) { |
269 | my $blob = $blob_cols->{$col}; |
9b3dabe0 |
270 | my $sth; |
fd5a07e4 |
271 | |
9b3dabe0 |
272 | if (not $self->isa('DBIx::Class::Storage::DBI::NoBindVars')) { |
273 | my $search_cond = join ',' => map "$_ = ?", @primary_cols; |
274 | |
275 | $sth = $self->sth( |
276 | "select $col from $table where $search_cond" |
277 | ); |
078a332f |
278 | $sth->execute(map $row{$_}, @primary_cols); |
9b3dabe0 |
279 | } else { |
078a332f |
280 | my $search_cond = join ',' => map "$_ = $row{$_}", @primary_cols; |
9b3dabe0 |
281 | |
282 | $sth = $dbh->prepare( |
283 | "select $col from $table where $search_cond" |
284 | ); |
285 | $sth->execute; |
286 | } |
fd5a07e4 |
287 | |
288 | eval { |
289 | while ($sth->fetch) { |
290 | $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr; |
291 | } |
292 | $sth->func('ct_prepare_send') or die $sth->errstr; |
293 | |
294 | my $log_on_update = $self->_blob_log_on_update; |
295 | $log_on_update = 1 if not defined $log_on_update; |
296 | |
297 | $sth->func('CS_SET', 1, { |
298 | total_txtlen => length($blob), |
299 | log_on_update => $log_on_update |
300 | }, 'ct_data_info') or die $sth->errstr; |
301 | |
302 | $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr; |
303 | |
304 | $sth->func('ct_finish_send') or die $sth->errstr; |
305 | }; |
306 | my $exception = $@; |
307 | $sth->finish; |
308 | croak $exception if $exception; |
309 | } |
63d46bb3 |
310 | } |
311 | |
9539eeb1 |
312 | =head2 connect_call_datetime_setup |
313 | |
314 | Used as: |
315 | |
316 | on_connect_call => 'datetime_setup' |
317 | |
318 | In L<DBIx::Class::Storage::DBI/connect_info> to set: |
319 | |
3abafb11 |
320 | $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z |
321 | $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080 |
9539eeb1 |
322 | |
323 | On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using |
3abafb11 |
324 | L<DateTime::Format::Sybase>, which you will need to install. |
325 | |
326 | This works for both C<DATETIME> and C<SMALLDATETIME> columns, although |
327 | C<SMALLDATETIME> columns only have minute precision. |
9539eeb1 |
328 | |
329 | =cut |
330 | |
9041a97a |
331 | { |
332 | my $old_dbd_warned = 0; |
333 | |
9539eeb1 |
334 | sub connect_call_datetime_setup { |
6b1f5ef7 |
335 | my $self = shift; |
6b1f5ef7 |
336 | my $dbh = $self->_dbh; |
337 | |
338 | if ($dbh->can('syb_date_fmt')) { |
339 | $dbh->syb_date_fmt('ISO_strict'); |
340 | } elsif (not $old_dbd_warned) { |
341 | carp "Your DBD::Sybase is too old to support ". |
342 | "DBIx::Class::InflateColumn::DateTime, please upgrade!"; |
343 | $old_dbd_warned = 1; |
344 | } |
345 | |
346 | $dbh->do('set dateformat mdy'); |
c5ce7cd6 |
347 | |
6b1f5ef7 |
348 | 1; |
c5ce7cd6 |
349 | } |
6b1f5ef7 |
350 | } |
351 | |
6636ad53 |
352 | sub datetime_parser_type { "DateTime::Format::Sybase" } |
353 | |
6b1f5ef7 |
354 | sub _dbh_last_insert_id { |
355 | my ($self, $dbh, $source, $col) = @_; |
c5ce7cd6 |
356 | |
357 | # sorry, there's no other way! |
23419345 |
358 | my $sth = $self->sth("select max($col) from ".$source->from); |
359 | my ($id) = $dbh->selectrow_array($sth); |
360 | $sth->finish; |
361 | |
362 | return $id; |
a964a928 |
363 | } |
364 | |
3885cff6 |
365 | 1; |
366 | |
41c93b1b |
367 | =head1 MAXIMUM CONNECTIONS |
368 | |
369 | L<DBD::Sybase> makes separate connections to the server for active statements in |
370 | the background. By default the number of such connections is limited to 25, on |
371 | both the client side and the server side. |
372 | |
373 | This is a bit too low, so on connection the clientside setting is set to C<256> |
374 | (see L<DBD::Sybase/maxConnect>.) You can override it to whatever setting you |
375 | like in the DSN. |
376 | |
377 | See |
378 | L<http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.ase_15.0.sag1/html/sag1/sag1272.htm> |
379 | for information on changing the setting on the server side. |
380 | |
c5ce7cd6 |
381 | =head1 DATES |
382 | |
3abafb11 |
383 | See L</connect_call_datetime_setup> to setup date formats |
384 | for L<DBIx::Class::InflateColumn::DateTime>. |
c5ce7cd6 |
385 | |
6636ad53 |
386 | =head1 IMAGE AND TEXT COLUMNS |
63d46bb3 |
387 | |
5703eb14 |
388 | You need at least version C<1.09> of L<DBD::Sybase> for C<TEXT/IMAGE> column |
389 | support. |
390 | |
63d46bb3 |
391 | See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info> |
392 | setting you need to work with C<IMAGE> columns. |
393 | |
3885cff6 |
394 | =head1 AUTHORS |
395 | |
7e8cecc1 |
396 | See L<DBIx::Class/CONTRIBUTORS>. |
c5ce7cd6 |
397 | |
3885cff6 |
398 | =head1 LICENSE |
399 | |
400 | You may distribute this code under the same terms as Perl itself. |
401 | |
402 | =cut |
c5ce7cd6 |
403 | # vim:sts=2 sw=2: |