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1 | package DBIx::Class::Storage::DBI::Sybase; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
a0348159 |
6 | use Class::C3; |
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7 | use base qw/DBIx::Class::Storage::DBI/; |
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8 | |
6b1f5ef7 |
9 | use Carp::Clan qw/^DBIx::Class/; |
10 | |
98259fe4 |
11 | =head1 NAME |
12 | |
13 | DBIx::Class::Storage::DBI::Sybase - Storage::DBI subclass for Sybase |
14 | |
15 | =head1 SYNOPSIS |
16 | |
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>. |
20 | |
21 | =head1 DESCRIPTION |
22 | |
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. |
26 | |
27 | With this driver there is unfortunately no way to get the C<last_insert_id> |
28 | without doing a C<select max(col)>. |
29 | |
30 | But your queries will be cached. |
31 | |
fd5a07e4 |
32 | A recommended L<DBIx::Class::Storage::DBI/connect_info> settings: |
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33 | |
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34 | on_connect_call => [['datetime_setup'], [blob_setup => log_on_update => 0]] |
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35 | |
36 | =head1 METHODS |
37 | |
38 | =cut |
39 | |
fd5a07e4 |
40 | __PACKAGE__->mk_group_accessors('simple' => |
41 | qw/_blob_log_on_update/ |
42 | ); |
43 | |
47d9646a |
44 | sub _rebless { |
b50a5275 |
45 | my $self = shift; |
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46 | |
47 | if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') { |
48 | my $dbtype = eval { |
49 | @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2] |
50 | } || ''; |
51 | |
52 | my $exception = $@; |
53 | $dbtype =~ s/\W/_/gi; |
54 | my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}"; |
55 | |
56 | if (!$exception && $dbtype && $self->load_optional_class($subclass)) { |
57 | bless $self, $subclass; |
58 | $self->_rebless; |
683f73ec |
59 | } else { |
60 | # real Sybase |
61 | if (not $self->dbh->{syb_dynamic_supported}) { |
62 | bless $self, 'DBIx::Class::Storage:DBI::Sybase::NoBindVars'; |
63 | $self->_rebless; |
64 | } |
47d9646a |
65 | } |
c5ce7cd6 |
66 | } |
b50a5275 |
67 | } |
68 | |
63d46bb3 |
69 | =head2 connect_call_blob_setup |
70 | |
71 | Used as: |
72 | |
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73 | on_connect_call => [ [ blob_setup => log_on_update => 0 ] ] |
63d46bb3 |
74 | |
75 | Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary |
76 | instead of as a hex string. |
77 | |
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78 | Recommended. |
79 | |
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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. |
82 | |
83 | See |
84 | L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>. |
85 | |
63d46bb3 |
86 | =cut |
87 | |
88 | sub connect_call_blob_setup { |
89 | my $self = shift; |
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90 | my %args = @_; |
63d46bb3 |
91 | my $dbh = $self->_dbh; |
92 | $dbh->{syb_binary_images} = 1; |
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93 | |
94 | $self->_blob_log_on_update($args{log_on_update}) |
95 | if exists $args{log_on_update}; |
96 | } |
97 | |
98 | sub _is_lob_type { |
99 | my $self = shift; |
100 | shift =~ /(?:text|image|lob|bytea|binary)/i; |
101 | } |
102 | |
103 | sub insert { |
104 | my $self = shift; |
105 | my ($source, $to_insert) = @_; |
106 | |
107 | my %blob_cols; |
108 | |
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}); |
112 | } |
113 | |
114 | my $updated_cols = $self->next::method(@_); |
115 | |
116 | $self->_update_blobs($source, \%blob_cols, $to_insert) if %blob_cols; |
117 | |
118 | return $updated_cols; |
119 | } |
120 | |
121 | sub _update_blobs { |
122 | my ($self, $source, $blob_cols, $inserted) = @_; |
123 | my $dbh = $self->dbh; |
124 | |
125 | my $table = $source->from; |
126 | |
127 | my (@primary_cols) = $source->primary_columns; |
128 | |
129 | croak "Cannot update TEXT/IMAGE without a primary key!" |
130 | unless @primary_cols; |
131 | |
132 | my $search_cond = join ',' => map "$_ = ?", @primary_cols; |
133 | |
134 | for my $col (keys %$blob_cols) { |
135 | my $blob = $blob_cols->{$col}; |
136 | |
137 | # First update to empty string in case it's NULL, can't update a NULL blob using |
138 | # the API. |
139 | my $sth = $dbh->prepare_cached( |
140 | qq{update $table set $col = '' where $search_cond} |
141 | ); |
142 | $sth->execute(map $inserted->{$_}, @primary_cols) or die $sth->errstr; |
143 | $sth->finish; |
144 | |
145 | $sth = $dbh->prepare_cached( |
146 | "select $col from $table where $search_cond" |
147 | ); |
148 | $sth->execute(map $inserted->{$_}, @primary_cols); |
149 | |
150 | eval { |
151 | while ($sth->fetch) { |
152 | $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr; |
153 | } |
154 | $sth->func('ct_prepare_send') or die $sth->errstr; |
155 | |
156 | my $log_on_update = $self->_blob_log_on_update; |
157 | $log_on_update = 1 if not defined $log_on_update; |
158 | |
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; |
163 | |
164 | $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr; |
165 | |
166 | $sth->func('ct_finish_send') or die $sth->errstr; |
167 | }; |
168 | my $exception = $@; |
169 | $sth->finish; |
170 | croak $exception if $exception; |
171 | } |
63d46bb3 |
172 | } |
173 | |
9539eeb1 |
174 | =head2 connect_call_datetime_setup |
175 | |
176 | Used as: |
177 | |
178 | on_connect_call => 'datetime_setup' |
179 | |
180 | In L<DBIx::Class::Storage::DBI/connect_info> to set: |
181 | |
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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 |
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184 | |
185 | On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using |
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186 | L<DateTime::Format::Sybase>, which you will need to install. |
187 | |
188 | This works for both C<DATETIME> and C<SMALLDATETIME> columns, although |
189 | C<SMALLDATETIME> columns only have minute precision. |
9539eeb1 |
190 | |
191 | =cut |
192 | |
9041a97a |
193 | { |
194 | my $old_dbd_warned = 0; |
195 | |
9539eeb1 |
196 | sub connect_call_datetime_setup { |
6b1f5ef7 |
197 | my $self = shift; |
6b1f5ef7 |
198 | my $dbh = $self->_dbh; |
199 | |
200 | if ($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!"; |
205 | $old_dbd_warned = 1; |
206 | } |
207 | |
208 | $dbh->do('set dateformat mdy'); |
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209 | |
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210 | 1; |
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211 | } |
6b1f5ef7 |
212 | } |
213 | |
6636ad53 |
214 | sub datetime_parser_type { "DateTime::Format::Sybase" } |
215 | |
6b1f5ef7 |
216 | sub _dbh_last_insert_id { |
217 | my ($self, $dbh, $source, $col) = @_; |
c5ce7cd6 |
218 | |
219 | # sorry, there's no other way! |
220 | my $sth = $dbh->prepare_cached("select max($col) from ".$source->from); |
221 | return ($dbh->selectrow_array($sth))[0]; |
a964a928 |
222 | } |
223 | |
98259fe4 |
224 | # previous implementation of limited count for Sybase, does not include |
225 | # count_grouped. |
226 | |
227 | #sub _copy_attributes_for_count { |
228 | # my ($self, $source, $attrs) = @_; |
229 | # my %attrs = %$attrs; |
230 | # |
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/}; |
233 | # |
234 | # return \%attrs; |
235 | #} |
236 | # |
237 | #=head2 count |
238 | # |
239 | #Counts for limited queries are emulated by executing select queries and |
240 | #returning the number of successful executions minus the offset. |
241 | # |
242 | #This is necessary due to the limitations of Sybase. |
243 | # |
244 | #=cut |
245 | # |
246 | #sub count { |
247 | # my $self = shift; |
248 | # my ($source, $attrs) = @_; |
249 | # |
250 | # my $new_attrs = $self->_copy_attributes_for_count($source, $attrs); |
251 | # |
252 | # if (exists $attrs->{rows}) { |
253 | # my $offset = $attrs->{offset} || 0; |
254 | # my $total = $attrs->{rows} + $offset; |
255 | # |
256 | # my $first_pk = ($source->primary_columns)[0]; |
257 | # |
258 | # $new_attrs->{select} = $first_pk ? "me.$first_pk" : 1; |
259 | # |
260 | # my $tmp_rs = $source->resultset_class->new($source, $new_attrs); |
261 | # |
262 | # $self->dbh->{syb_rowcount} = $total; |
263 | # |
264 | # my $count = 0; |
265 | # $count++ while $tmp_rs->cursor->next; |
266 | # |
267 | # $self->dbh->{syb_rowcount} = 0; |
268 | # |
269 | # return $count - $offset; |
270 | # } else { |
271 | # # overwrite the selector |
272 | # $new_attrs->{select} = { count => '*' }; |
273 | # |
274 | # my $tmp_rs = $source->resultset_class->new($source, $new_attrs); |
275 | # my ($count) = $tmp_rs->cursor->next; |
276 | # |
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); |
282 | # |
283 | # return $count; |
284 | # } |
285 | #} |
b7505130 |
286 | |
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287 | 1; |
288 | |
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289 | =head1 DATES |
290 | |
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291 | See L</connect_call_datetime_setup> to setup date formats |
292 | for L<DBIx::Class::InflateColumn::DateTime>. |
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293 | |
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294 | =head1 IMAGE AND TEXT COLUMNS |
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295 | |
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. |
298 | |
6636ad53 |
299 | Due to limitations in L<DBD::Sybase> and this driver, it is only possible to |
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300 | select one C<TEXT> or C<IMAGE> column at a time. |
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301 | |
3885cff6 |
302 | =head1 AUTHORS |
303 | |
7e8cecc1 |
304 | See L<DBIx::Class/CONTRIBUTORS>. |
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305 | |
3885cff6 |
306 | =head1 LICENSE |
307 | |
308 | You may distribute this code under the same terms as Perl itself. |
309 | |
310 | =cut |
c5ce7cd6 |
311 | # vim:sts=2 sw=2: |