Commit | Line | Data |
3885cff6 |
1 | package DBIx::Class::Storage::DBI::Sybase; |
2 | |
3 | use strict; |
4 | use warnings; |
eabab5d0 |
5 | use mro 'c3'; |
6 | use base qw/ |
7 | DBIx::Class::Storage::DBI::Sybase::Base |
fd423205 |
8 | DBIx::Class::Storage::DBI |
eabab5d0 |
9 | /; |
6b1f5ef7 |
10 | use Carp::Clan qw/^DBIx::Class/; |
11 | |
98259fe4 |
12 | =head1 NAME |
13 | |
14 | DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase |
15 | |
16 | =head1 SYNOPSIS |
17 | |
18 | This subclass supports L<DBD::Sybase> for real Sybase databases. If you are |
19 | using an MSSQL database via L<DBD::Sybase>, your storage will be reblessed to |
20 | L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server>. |
21 | |
22 | =head1 DESCRIPTION |
23 | |
24 | If your version of Sybase does not support placeholders, then your storage |
25 | will be reblessed to L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>. You can |
26 | also enable that driver explicitly, see the documentation for more details. |
27 | |
28 | With this driver there is unfortunately no way to get the C<last_insert_id> |
29 | without doing a C<select max(col)>. |
30 | |
31 | But your queries will be cached. |
32 | |
fd5a07e4 |
33 | A recommended L<DBIx::Class::Storage::DBI/connect_info> settings: |
98259fe4 |
34 | |
fd5a07e4 |
35 | on_connect_call => [['datetime_setup'], [blob_setup => log_on_update => 0]] |
98259fe4 |
36 | |
37 | =head1 METHODS |
38 | |
39 | =cut |
40 | |
fd5a07e4 |
41 | __PACKAGE__->mk_group_accessors('simple' => |
42 | qw/_blob_log_on_update/ |
43 | ); |
44 | |
47d9646a |
45 | sub _rebless { |
b50a5275 |
46 | my $self = shift; |
c5ce7cd6 |
47 | |
48 | if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') { |
49 | my $dbtype = eval { |
50 | @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2] |
51 | } || ''; |
52 | |
53 | my $exception = $@; |
54 | $dbtype =~ s/\W/_/gi; |
55 | my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}"; |
56 | |
57 | if (!$exception && $dbtype && $self->load_optional_class($subclass)) { |
58 | bless $self, $subclass; |
59 | $self->_rebless; |
683f73ec |
60 | } else { |
61 | # real Sybase |
62 | if (not $self->dbh->{syb_dynamic_supported}) { |
63 | bless $self, 'DBIx::Class::Storage:DBI::Sybase::NoBindVars'; |
64 | $self->_rebless; |
65 | } |
47d9646a |
66 | } |
c5ce7cd6 |
67 | } |
b50a5275 |
68 | } |
69 | |
63d46bb3 |
70 | =head2 connect_call_blob_setup |
71 | |
72 | Used as: |
73 | |
fd5a07e4 |
74 | on_connect_call => [ [ blob_setup => log_on_update => 0 ] ] |
63d46bb3 |
75 | |
76 | Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary |
77 | instead of as a hex string. |
78 | |
6636ad53 |
79 | Recommended. |
80 | |
fd5a07e4 |
81 | Also sets the C<log_on_update> value for blob write operations. The default is |
82 | C<1>, but C<0> is better if your database is configured for it. |
83 | |
84 | See |
85 | L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>. |
86 | |
63d46bb3 |
87 | =cut |
88 | |
89 | sub connect_call_blob_setup { |
90 | my $self = shift; |
fd5a07e4 |
91 | my %args = @_; |
63d46bb3 |
92 | my $dbh = $self->_dbh; |
93 | $dbh->{syb_binary_images} = 1; |
fd5a07e4 |
94 | |
95 | $self->_blob_log_on_update($args{log_on_update}) |
96 | if exists $args{log_on_update}; |
97 | } |
98 | |
99 | sub _is_lob_type { |
100 | my $self = shift; |
101 | shift =~ /(?:text|image|lob|bytea|binary)/i; |
102 | } |
103 | |
104 | sub insert { |
7d17f469 |
105 | my ($self, $source, $to_insert) = splice @_, 0, 3; |
106 | |
107 | my $blob_cols = $self->_remove_blob_cols($source, $to_insert); |
108 | |
109 | my $updated_cols = $self->next::method($source, $to_insert, @_); |
110 | |
111 | $self->_update_blobs($source, $blob_cols, $to_insert) if %$blob_cols; |
112 | |
113 | return $updated_cols; |
114 | } |
115 | |
116 | #sub update { |
117 | # my ($self, $source) = splice @_, 0, 2; |
118 | # my ($fields) = @_; |
119 | # |
120 | # my $blob_cols = $self->_remove_blob_cols($source, $fields); |
121 | # |
122 | # my @res = 1; |
123 | # |
124 | # if (%$fields) { |
125 | # if (wantarray) { |
126 | # @res = $self->next::method($source, @_); |
127 | # } else { |
128 | # $res[0] = $self->next::method($source, @_); |
129 | # } |
130 | # } |
131 | # |
132 | # $self->_update_blobs($source, $blob_cols, $fields) if %$blob_cols; |
133 | # |
134 | # return wantarray ? @res : $res[0]; |
135 | #} |
136 | |
137 | sub _remove_blob_cols { |
138 | my ($self, $source, $fields) = @_; |
fd5a07e4 |
139 | |
140 | my %blob_cols; |
141 | |
7d17f469 |
142 | for my $col (keys %$fields) { |
143 | $blob_cols{$col} = delete $fields->{$col} |
fd5a07e4 |
144 | if $self->_is_lob_type($source->column_info($col)->{data_type}); |
145 | } |
146 | |
7d17f469 |
147 | return \%blob_cols; |
fd5a07e4 |
148 | } |
149 | |
150 | sub _update_blobs { |
151 | my ($self, $source, $blob_cols, $inserted) = @_; |
152 | my $dbh = $self->dbh; |
153 | |
154 | my $table = $source->from; |
155 | |
156 | my (@primary_cols) = $source->primary_columns; |
157 | |
158 | croak "Cannot update TEXT/IMAGE without a primary key!" |
159 | unless @primary_cols; |
160 | |
161 | my $search_cond = join ',' => map "$_ = ?", @primary_cols; |
162 | |
163 | for my $col (keys %$blob_cols) { |
164 | my $blob = $blob_cols->{$col}; |
165 | |
166 | # First update to empty string in case it's NULL, can't update a NULL blob using |
167 | # the API. |
168 | my $sth = $dbh->prepare_cached( |
169 | qq{update $table set $col = '' where $search_cond} |
170 | ); |
171 | $sth->execute(map $inserted->{$_}, @primary_cols) or die $sth->errstr; |
172 | $sth->finish; |
173 | |
174 | $sth = $dbh->prepare_cached( |
175 | "select $col from $table where $search_cond" |
176 | ); |
177 | $sth->execute(map $inserted->{$_}, @primary_cols); |
178 | |
179 | eval { |
180 | while ($sth->fetch) { |
181 | $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr; |
182 | } |
183 | $sth->func('ct_prepare_send') or die $sth->errstr; |
184 | |
185 | my $log_on_update = $self->_blob_log_on_update; |
186 | $log_on_update = 1 if not defined $log_on_update; |
187 | |
188 | $sth->func('CS_SET', 1, { |
189 | total_txtlen => length($blob), |
190 | log_on_update => $log_on_update |
191 | }, 'ct_data_info') or die $sth->errstr; |
192 | |
193 | $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr; |
194 | |
195 | $sth->func('ct_finish_send') or die $sth->errstr; |
196 | }; |
197 | my $exception = $@; |
198 | $sth->finish; |
199 | croak $exception if $exception; |
200 | } |
63d46bb3 |
201 | } |
202 | |
9539eeb1 |
203 | =head2 connect_call_datetime_setup |
204 | |
205 | Used as: |
206 | |
207 | on_connect_call => 'datetime_setup' |
208 | |
209 | In L<DBIx::Class::Storage::DBI/connect_info> to set: |
210 | |
3abafb11 |
211 | $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z |
212 | $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080 |
9539eeb1 |
213 | |
214 | On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using |
3abafb11 |
215 | L<DateTime::Format::Sybase>, which you will need to install. |
216 | |
217 | This works for both C<DATETIME> and C<SMALLDATETIME> columns, although |
218 | C<SMALLDATETIME> columns only have minute precision. |
9539eeb1 |
219 | |
220 | =cut |
221 | |
9041a97a |
222 | { |
223 | my $old_dbd_warned = 0; |
224 | |
9539eeb1 |
225 | sub connect_call_datetime_setup { |
6b1f5ef7 |
226 | my $self = shift; |
6b1f5ef7 |
227 | my $dbh = $self->_dbh; |
228 | |
229 | if ($dbh->can('syb_date_fmt')) { |
230 | $dbh->syb_date_fmt('ISO_strict'); |
231 | } elsif (not $old_dbd_warned) { |
232 | carp "Your DBD::Sybase is too old to support ". |
233 | "DBIx::Class::InflateColumn::DateTime, please upgrade!"; |
234 | $old_dbd_warned = 1; |
235 | } |
236 | |
237 | $dbh->do('set dateformat mdy'); |
c5ce7cd6 |
238 | |
6b1f5ef7 |
239 | 1; |
c5ce7cd6 |
240 | } |
6b1f5ef7 |
241 | } |
242 | |
6636ad53 |
243 | sub datetime_parser_type { "DateTime::Format::Sybase" } |
244 | |
6b1f5ef7 |
245 | sub _dbh_last_insert_id { |
246 | my ($self, $dbh, $source, $col) = @_; |
c5ce7cd6 |
247 | |
248 | # sorry, there's no other way! |
249 | my $sth = $dbh->prepare_cached("select max($col) from ".$source->from); |
250 | return ($dbh->selectrow_array($sth))[0]; |
a964a928 |
251 | } |
252 | |
98259fe4 |
253 | # previous implementation of limited count for Sybase, does not include |
254 | # count_grouped. |
255 | |
256 | #sub _copy_attributes_for_count { |
257 | # my ($self, $source, $attrs) = @_; |
258 | # my %attrs = %$attrs; |
259 | # |
260 | # # take off any column specs, any pagers, record_filter is cdbi, and no point of ordering a count |
261 | # delete @attrs{qw/select as rows offset page order_by record_filter/}; |
262 | # |
263 | # return \%attrs; |
264 | #} |
265 | # |
266 | #=head2 count |
267 | # |
268 | #Counts for limited queries are emulated by executing select queries and |
269 | #returning the number of successful executions minus the offset. |
270 | # |
271 | #This is necessary due to the limitations of Sybase. |
272 | # |
273 | #=cut |
274 | # |
275 | #sub count { |
276 | # my $self = shift; |
277 | # my ($source, $attrs) = @_; |
278 | # |
279 | # my $new_attrs = $self->_copy_attributes_for_count($source, $attrs); |
280 | # |
281 | # if (exists $attrs->{rows}) { |
282 | # my $offset = $attrs->{offset} || 0; |
283 | # my $total = $attrs->{rows} + $offset; |
284 | # |
285 | # my $first_pk = ($source->primary_columns)[0]; |
286 | # |
287 | # $new_attrs->{select} = $first_pk ? "me.$first_pk" : 1; |
288 | # |
289 | # my $tmp_rs = $source->resultset_class->new($source, $new_attrs); |
290 | # |
291 | # $self->dbh->{syb_rowcount} = $total; |
292 | # |
293 | # my $count = 0; |
294 | # $count++ while $tmp_rs->cursor->next; |
295 | # |
296 | # $self->dbh->{syb_rowcount} = 0; |
297 | # |
298 | # return $count - $offset; |
299 | # } else { |
300 | # # overwrite the selector |
301 | # $new_attrs->{select} = { count => '*' }; |
302 | # |
303 | # my $tmp_rs = $source->resultset_class->new($source, $new_attrs); |
304 | # my ($count) = $tmp_rs->cursor->next; |
305 | # |
306 | # # if the offset/rows attributes are still present, we did not use |
307 | # # a subquery, so we need to make the calculations in software |
308 | # $count -= $attrs->{offset} if $attrs->{offset}; |
309 | # $count = $attrs->{rows} if $attrs->{rows} and $attrs->{rows} < $count; |
310 | # $count = 0 if ($count < 0); |
311 | # |
312 | # return $count; |
313 | # } |
314 | #} |
b7505130 |
315 | |
3885cff6 |
316 | 1; |
317 | |
c5ce7cd6 |
318 | =head1 DATES |
319 | |
3abafb11 |
320 | See L</connect_call_datetime_setup> to setup date formats |
321 | for L<DBIx::Class::InflateColumn::DateTime>. |
c5ce7cd6 |
322 | |
6636ad53 |
323 | =head1 IMAGE AND TEXT COLUMNS |
63d46bb3 |
324 | |
325 | See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info> |
326 | setting you need to work with C<IMAGE> columns. |
327 | |
6636ad53 |
328 | Due to limitations in L<DBD::Sybase> and this driver, it is only possible to |
9041a97a |
329 | select one C<TEXT> or C<IMAGE> column at a time. |
6636ad53 |
330 | |
3885cff6 |
331 | =head1 AUTHORS |
332 | |
7e8cecc1 |
333 | See L<DBIx::Class/CONTRIBUTORS>. |
c5ce7cd6 |
334 | |
3885cff6 |
335 | =head1 LICENSE |
336 | |
337 | You may distribute this code under the same terms as Perl itself. |
338 | |
339 | =cut |
c5ce7cd6 |
340 | # vim:sts=2 sw=2: |