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/ |
2f92e90b |
7 | DBIx::Class::Storage::DBI::Sybase::Common |
07a5866e |
8 | DBIx::Class::Storage::DBI::AutoCast |
eabab5d0 |
9 | /; |
2ad62d97 |
10 | use mro 'c3'; |
6b1f5ef7 |
11 | use Carp::Clan qw/^DBIx::Class/; |
289877b0 |
12 | use List::Util (); |
6b1f5ef7 |
13 | |
285baccb |
14 | __PACKAGE__->mk_group_accessors('simple' => |
07a5866e |
15 | qw/_identity _blob_log_on_update insert_txn/ |
285baccb |
16 | ); |
17 | |
98259fe4 |
18 | =head1 NAME |
19 | |
928f0af8 |
20 | DBIx::Class::Storage::DBI::Sybase - Sybase support for DBIx::Class |
98259fe4 |
21 | |
22 | =head1 SYNOPSIS |
23 | |
24 | This subclass supports L<DBD::Sybase> for real Sybase databases. If you are |
25 | using an MSSQL database via L<DBD::Sybase>, your storage will be reblessed to |
26 | L<DBIx::Class::Storage::DBI::Sybase::Microsoft_SQL_Server>. |
27 | |
28 | =head1 DESCRIPTION |
29 | |
30 | If your version of Sybase does not support placeholders, then your storage |
31 | will be reblessed to L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>. You can |
32 | also enable that driver explicitly, see the documentation for more details. |
33 | |
34 | With this driver there is unfortunately no way to get the C<last_insert_id> |
310a0a0a |
35 | without doing a C<SELECT MAX(col)>. This is done safely in a transaction |
36 | (locking the table.) The transaction can be turned off if concurrency is not an |
37 | issue, see L<DBIx::Class::Storage::DBI::Sybase/connect_call_unsafe_insert>. |
98259fe4 |
38 | |
39 | But your queries will be cached. |
40 | |
61cfaef7 |
41 | A recommended L<DBIx::Class::Storage::DBI/connect_info> setting: |
98259fe4 |
42 | |
61cfaef7 |
43 | on_connect_call => [['datetime_setup'], ['blob_setup', log_on_update => 0]] |
98259fe4 |
44 | |
45 | =head1 METHODS |
46 | |
47 | =cut |
48 | |
47d9646a |
49 | sub _rebless { |
b50a5275 |
50 | my $self = shift; |
c5ce7cd6 |
51 | |
52 | if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') { |
53 | my $dbtype = eval { |
2eef8633 |
54 | @{$self->_get_dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2] |
c5ce7cd6 |
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 | |
a3a526cc |
67 | # This is reset to 0 in ::NoBindVars, only necessary because we use max(col) to |
68 | # get the identity. |
310a0a0a |
69 | $self->insert_txn(1); |
a3a526cc |
70 | |
e97a6ee2 |
71 | if ($self->using_freetds) { |
a3a526cc |
72 | carp <<'EOF' unless $ENV{DBIC_SYBASE_FREETDS_NOWARN}; |
73 | |
74 | You are using FreeTDS with Sybase. |
5703eb14 |
75 | |
a3a526cc |
76 | We will do our best to support this configuration, but please consider this |
77 | support experimental. |
5703eb14 |
78 | |
a3a526cc |
79 | TEXT/IMAGE columns will definitely not work. |
8c4b6c50 |
80 | |
e97a6ee2 |
81 | You are encouraged to recompile DBD::Sybase with the Sybase Open Client libraries |
a3a526cc |
82 | instead. |
5703eb14 |
83 | |
84 | See perldoc DBIx::Class::Storage::DBI::Sybase for more details. |
a3a526cc |
85 | |
86 | To turn off this warning set the DBIC_SYBASE_FREETDS_NOWARN environment |
87 | variable. |
5703eb14 |
88 | EOF |
70ced519 |
89 | if (not $self->_typeless_placeholders_supported) { |
90 | if ($self->_placeholders_supported) { |
e97a6ee2 |
91 | $self->auto_cast(1); |
a3a526cc |
92 | } else { |
93 | $self->ensure_class_loaded($no_bind_vars); |
94 | bless $self, $no_bind_vars; |
95 | $self->_rebless; |
96 | } |
97 | } |
61cfaef7 |
98 | |
e97a6ee2 |
99 | $self->set_textsize; # based on LongReadLen in connect_info |
100 | |
101 | } elsif (not $self->dbh->{syb_dynamic_supported}) { |
102 | # not necessarily FreeTDS, but no placeholders nevertheless |
61cfaef7 |
103 | $self->ensure_class_loaded($no_bind_vars); |
104 | bless $self, $no_bind_vars; |
105 | $self->_rebless; |
310a0a0a |
106 | } elsif (not $self->_typeless_placeholders_supported) { |
107 | # this is highly unlikely, but we check just in case |
108 | $self->auto_cast(1); |
61cfaef7 |
109 | } |
110 | |
a3a526cc |
111 | $self->_set_max_connect(256); |
47d9646a |
112 | } |
c5ce7cd6 |
113 | } |
b50a5275 |
114 | } |
115 | |
a3a526cc |
116 | # Make sure we have CHAINED mode turned on if AutoCommit is off in non-FreeTDS |
117 | # DBD::Sybase (since we don't know how DBD::Sybase was compiled.) If however |
118 | # we're using FreeTDS, CHAINED mode turns on an implicit transaction which we |
119 | # only want when AutoCommit is off. |
f6de7111 |
120 | sub _populate_dbh { |
121 | my $self = shift; |
41c93b1b |
122 | |
a3a526cc |
123 | $self->next::method(@_); |
41c93b1b |
124 | |
e97a6ee2 |
125 | if (not $self->using_freetds) { |
a3a526cc |
126 | $self->_dbh->{syb_chained_txn} = 1; |
127 | } else { |
128 | if ($self->_dbh_autocommit) { |
129 | $self->_dbh->do('SET CHAINED OFF'); |
130 | } else { |
131 | $self->_dbh->do('SET CHAINED ON'); |
132 | } |
41c93b1b |
133 | } |
134 | } |
135 | |
63d46bb3 |
136 | =head2 connect_call_blob_setup |
137 | |
138 | Used as: |
139 | |
61cfaef7 |
140 | on_connect_call => [ [ 'blob_setup', log_on_update => 0 ] ] |
63d46bb3 |
141 | |
142 | Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary |
143 | instead of as a hex string. |
144 | |
6636ad53 |
145 | Recommended. |
146 | |
fd5a07e4 |
147 | Also sets the C<log_on_update> value for blob write operations. The default is |
148 | C<1>, but C<0> is better if your database is configured for it. |
149 | |
150 | See |
151 | L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>. |
152 | |
63d46bb3 |
153 | =cut |
154 | |
155 | sub connect_call_blob_setup { |
156 | my $self = shift; |
fd5a07e4 |
157 | my %args = @_; |
63d46bb3 |
158 | my $dbh = $self->_dbh; |
159 | $dbh->{syb_binary_images} = 1; |
fd5a07e4 |
160 | |
161 | $self->_blob_log_on_update($args{log_on_update}) |
162 | if exists $args{log_on_update}; |
163 | } |
164 | |
310a0a0a |
165 | =head2 connect_call_unsafe_insert |
166 | |
167 | With placeholders enabled, inserts are done in a transaction so that there are |
168 | no concurrency issues with getting the inserted identity value using |
169 | C<SELECT MAX(col)> when placeholders are enabled. |
170 | |
171 | When using C<DBIx::Class::Storage::DBI::Sybase::NoBindVars> transactions are |
172 | disabled. |
173 | |
174 | To turn off transactions for inserts (for an application that doesn't need |
175 | concurrency, or a loader, for example) use this setting in |
176 | L<DBIx::Class::Storage::DBI/connect_info>, |
177 | |
178 | on_connect_call => ['unsafe_insert'] |
179 | |
180 | To manipulate this setting at runtime, use: |
181 | |
182 | $schema->storage->insert_txn(0); # 1 to re-enable |
183 | |
184 | =cut |
185 | |
186 | sub connect_call_unsafe_insert { |
187 | my $self = shift; |
188 | $self->insert_txn(0); |
189 | } |
190 | |
fd5a07e4 |
191 | sub _is_lob_type { |
192 | my $self = shift; |
5703eb14 |
193 | my $type = shift; |
078a332f |
194 | $type && $type =~ /(?:text|image|lob|bytea|binary|memo)/i; |
fd5a07e4 |
195 | } |
196 | |
07a5866e |
197 | # The select-piggybacking-on-insert trick stolen from mssql |
285baccb |
198 | sub _prep_for_execute { |
199 | my $self = shift; |
200 | my ($op, $extra_bind, $ident, $args) = @_; |
201 | |
202 | my ($sql, $bind) = $self->next::method (@_); |
203 | |
204 | if ($op eq 'insert') { |
285baccb |
205 | my $table = $ident->from; |
206 | |
a3a526cc |
207 | my $bind_info = $self->_resolve_column_info( |
208 | $ident, [map $_->[0], @{$bind}] |
209 | ); |
ec15b3fe |
210 | my $identity_col = |
285baccb |
211 | List::Util::first { $bind_info->{$_}{is_auto_increment} } (keys %$bind_info); |
212 | |
213 | if ($identity_col) { |
ec15b3fe |
214 | $sql = |
215 | "SET IDENTITY_INSERT $table ON\n" . |
216 | "$sql\n" . |
217 | "SET IDENTITY_INSERT $table OFF" |
285baccb |
218 | } else { |
219 | $identity_col = List::Util::first { |
220 | $ident->column_info($_)->{is_auto_increment} |
221 | } $ident->columns; |
222 | } |
223 | |
224 | if ($identity_col) { |
285baccb |
225 | $sql = |
285baccb |
226 | "$sql\n" . |
a3a526cc |
227 | $self->_fetch_identity_sql($ident, $identity_col); |
285baccb |
228 | } |
229 | } |
230 | |
231 | return ($sql, $bind); |
232 | } |
233 | |
a3a526cc |
234 | # Stolen from SQLT, with some modifications. This will likely change when the |
235 | # SQLT Sybase stuff is redone/fixed-up. |
236 | my %TYPE_MAPPING = ( |
237 | number => 'numeric', |
238 | money => 'money', |
239 | varchar => 'varchar', |
240 | varchar2 => 'varchar', |
241 | timestamp => 'datetime', |
242 | text => 'varchar', |
243 | real => 'double precision', |
244 | comment => 'text', |
245 | bit => 'bit', |
246 | tinyint => 'smallint', |
247 | float => 'double precision', |
248 | serial => 'numeric', |
249 | bigserial => 'numeric', |
250 | boolean => 'varchar', |
251 | long => 'varchar', |
252 | ); |
253 | |
07a5866e |
254 | sub _native_data_type { |
a3a526cc |
255 | my ($self, $type) = @_; |
256 | |
257 | $type = lc $type; |
258 | $type =~ s/ identity//; |
259 | |
260 | return uc($TYPE_MAPPING{$type} || $type); |
261 | } |
262 | |
285baccb |
263 | sub _fetch_identity_sql { |
264 | my ($self, $source, $col) = @_; |
265 | |
266 | return "SELECT MAX($col) FROM ".$source->from; |
267 | } |
268 | |
269 | sub _execute { |
270 | my $self = shift; |
271 | my ($op) = @_; |
272 | |
273 | my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_); |
274 | |
275 | if ($op eq 'insert') { |
276 | $self->_identity($sth->fetchrow_array); |
277 | $sth->finish; |
278 | } |
279 | |
280 | return wantarray ? ($rv, $sth, @bind) : $rv; |
281 | } |
282 | |
283 | sub last_insert_id { shift->_identity } |
284 | |
a3a526cc |
285 | # override to handle TEXT/IMAGE and to do a transaction if necessary |
fd5a07e4 |
286 | sub insert { |
7d17f469 |
287 | my ($self, $source, $to_insert) = splice @_, 0, 3; |
289877b0 |
288 | my $dbh = $self->_dbh; |
7d17f469 |
289 | |
290 | my $blob_cols = $self->_remove_blob_cols($source, $to_insert); |
291 | |
310a0a0a |
292 | my $need_last_insert_id = 0; |
293 | |
294 | my ($identity_col) = |
295 | map $_->[0], |
296 | grep $_->[1]{is_auto_increment}, |
297 | map [ $_, $source->column_info($_) ], |
298 | $source->columns; |
299 | |
300 | $need_last_insert_id = 1 |
301 | if $identity_col && (not exists $to_insert->{$identity_col}); |
302 | |
a3a526cc |
303 | # We have to do the insert in a transaction to avoid race conditions with the |
304 | # SELECT MAX(COL) identity method used when placeholders are enabled. |
f6de7111 |
305 | my $updated_cols = do { |
310a0a0a |
306 | if ($need_last_insert_id && $self->insert_txn && |
307 | (not $self->{transaction_depth})) { |
a3a526cc |
308 | my $args = \@_; |
309 | my $method = $self->next::can; |
310 | $self->txn_do( |
311 | sub { $self->$method($source, $to_insert, @$args) } |
312 | ); |
313 | } else { |
314 | $self->next::method($source, $to_insert, @_); |
315 | } |
f6de7111 |
316 | }; |
7d17f469 |
317 | |
078a332f |
318 | $self->_insert_blobs($source, $blob_cols, $to_insert) if %$blob_cols; |
7d17f469 |
319 | |
320 | return $updated_cols; |
321 | } |
322 | |
078a332f |
323 | sub update { |
324 | my ($self, $source) = splice @_, 0, 2; |
325 | my ($fields, $where) = @_; |
326 | my $wantarray = wantarray; |
327 | |
328 | my $blob_cols = $self->_remove_blob_cols($source, $fields); |
329 | |
330 | my @res; |
331 | if ($wantarray) { |
332 | @res = $self->next::method($source, @_); |
333 | } else { |
334 | $res[0] = $self->next::method($source, @_); |
335 | } |
336 | |
337 | $self->_update_blobs($source, $blob_cols, $where) if %$blob_cols; |
338 | |
339 | return $wantarray ? @res : $res[0]; |
340 | } |
7d17f469 |
341 | |
342 | sub _remove_blob_cols { |
343 | my ($self, $source, $fields) = @_; |
fd5a07e4 |
344 | |
345 | my %blob_cols; |
346 | |
7d17f469 |
347 | for my $col (keys %$fields) { |
9b3dabe0 |
348 | if ($self->_is_lob_type($source->column_info($col)->{data_type})) { |
349 | $blob_cols{$col} = delete $fields->{$col}; |
350 | $fields->{$col} = \"''"; |
351 | } |
fd5a07e4 |
352 | } |
353 | |
7d17f469 |
354 | return \%blob_cols; |
fd5a07e4 |
355 | } |
356 | |
357 | sub _update_blobs { |
078a332f |
358 | my ($self, $source, $blob_cols, $where) = @_; |
359 | |
360 | my (@primary_cols) = $source->primary_columns; |
361 | |
362 | croak "Cannot update TEXT/IMAGE column(s) without a primary key" |
363 | unless @primary_cols; |
364 | |
365 | # check if we're updating a single row by PK |
366 | my $pk_cols_in_where = 0; |
367 | for my $col (@primary_cols) { |
368 | $pk_cols_in_where++ if defined $where->{$col}; |
369 | } |
370 | my @rows; |
371 | |
372 | if ($pk_cols_in_where == @primary_cols) { |
373 | my %row_to_update; |
374 | @row_to_update{@primary_cols} = @{$where}{@primary_cols}; |
375 | @rows = \%row_to_update; |
376 | } else { |
377 | my $rs = $source->resultset->search( |
378 | $where, |
379 | { |
380 | result_class => 'DBIx::Class::ResultClass::HashRefInflator', |
381 | select => \@primary_cols |
382 | } |
383 | ); |
384 | @rows = $rs->all; # statement must finish |
385 | } |
386 | |
387 | for my $row (@rows) { |
388 | $self->_insert_blobs($source, $blob_cols, $row); |
389 | } |
390 | } |
391 | |
392 | sub _insert_blobs { |
393 | my ($self, $source, $blob_cols, $row) = @_; |
fd5a07e4 |
394 | my $dbh = $self->dbh; |
395 | |
396 | my $table = $source->from; |
397 | |
078a332f |
398 | my %row = %$row; |
fd5a07e4 |
399 | my (@primary_cols) = $source->primary_columns; |
400 | |
9b3dabe0 |
401 | croak "Cannot update TEXT/IMAGE column(s) without a primary key" |
fd5a07e4 |
402 | unless @primary_cols; |
403 | |
078a332f |
404 | if ((grep { defined $row{$_} } @primary_cols) != @primary_cols) { |
9b3dabe0 |
405 | if (@primary_cols == 1) { |
406 | my $col = $primary_cols[0]; |
078a332f |
407 | $row{$col} = $self->last_insert_id($source, $col); |
9b3dabe0 |
408 | } else { |
409 | croak "Cannot update TEXT/IMAGE column(s) without primary key values"; |
410 | } |
411 | } |
fd5a07e4 |
412 | |
413 | for my $col (keys %$blob_cols) { |
414 | my $blob = $blob_cols->{$col}; |
415 | |
a3a526cc |
416 | my %where = map { ($_, $row{$_}) } @primary_cols; |
417 | my $cursor = $source->resultset->search(\%where, { |
418 | select => [$col] |
419 | })->cursor; |
420 | $cursor->next; |
5137d252 |
421 | my $sth = $cursor->sth; |
fd5a07e4 |
422 | |
423 | eval { |
a3a526cc |
424 | do { |
fd5a07e4 |
425 | $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr; |
a3a526cc |
426 | } while $sth->fetch; |
427 | |
fd5a07e4 |
428 | $sth->func('ct_prepare_send') or die $sth->errstr; |
429 | |
430 | my $log_on_update = $self->_blob_log_on_update; |
431 | $log_on_update = 1 if not defined $log_on_update; |
432 | |
433 | $sth->func('CS_SET', 1, { |
434 | total_txtlen => length($blob), |
435 | log_on_update => $log_on_update |
436 | }, 'ct_data_info') or die $sth->errstr; |
437 | |
438 | $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr; |
439 | |
440 | $sth->func('ct_finish_send') or die $sth->errstr; |
441 | }; |
442 | my $exception = $@; |
a3a526cc |
443 | $sth->finish if $sth; |
444 | if ($exception) { |
e97a6ee2 |
445 | if ($self->using_freetds) { |
a3a526cc |
446 | croak |
447 | "TEXT/IMAGE operation failed, probably because you're using FreeTDS: " . |
448 | $exception; |
449 | } else { |
450 | croak $exception; |
451 | } |
452 | } |
fd5a07e4 |
453 | } |
63d46bb3 |
454 | } |
455 | |
9539eeb1 |
456 | =head2 connect_call_datetime_setup |
457 | |
458 | Used as: |
459 | |
460 | on_connect_call => 'datetime_setup' |
461 | |
462 | In L<DBIx::Class::Storage::DBI/connect_info> to set: |
463 | |
3abafb11 |
464 | $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z |
465 | $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080 |
9539eeb1 |
466 | |
467 | On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using |
3abafb11 |
468 | L<DateTime::Format::Sybase>, which you will need to install. |
469 | |
470 | This works for both C<DATETIME> and C<SMALLDATETIME> columns, although |
471 | C<SMALLDATETIME> columns only have minute precision. |
9539eeb1 |
472 | |
473 | =cut |
474 | |
9041a97a |
475 | { |
476 | my $old_dbd_warned = 0; |
477 | |
9539eeb1 |
478 | sub connect_call_datetime_setup { |
6b1f5ef7 |
479 | my $self = shift; |
6b1f5ef7 |
480 | my $dbh = $self->_dbh; |
481 | |
482 | if ($dbh->can('syb_date_fmt')) { |
e97a6ee2 |
483 | # amazingly, this works with FreeTDS |
6b1f5ef7 |
484 | $dbh->syb_date_fmt('ISO_strict'); |
485 | } elsif (not $old_dbd_warned) { |
486 | carp "Your DBD::Sybase is too old to support ". |
487 | "DBIx::Class::InflateColumn::DateTime, please upgrade!"; |
488 | $old_dbd_warned = 1; |
489 | } |
490 | |
e97a6ee2 |
491 | $dbh->do('SET DATEFORMAT mdy'); |
c5ce7cd6 |
492 | |
6b1f5ef7 |
493 | 1; |
c5ce7cd6 |
494 | } |
6b1f5ef7 |
495 | } |
496 | |
6636ad53 |
497 | sub datetime_parser_type { "DateTime::Format::Sybase" } |
498 | |
e97a6ee2 |
499 | # ->begin_work and such have no effect with FreeTDS but we run them anyway to |
500 | # let the DBD keep any state it needs to. |
501 | # |
502 | # If they ever do start working, the extra statements will do no harm (because |
503 | # Sybase supports nested transactions.) |
a3a526cc |
504 | |
505 | sub _dbh_begin_work { |
506 | my $self = shift; |
e97a6ee2 |
507 | $self->next::method(@_); |
508 | if ($self->using_freetds) { |
a3a526cc |
509 | $self->dbh->do('BEGIN TRAN'); |
510 | } |
511 | } |
512 | |
513 | sub _dbh_commit { |
514 | my $self = shift; |
e97a6ee2 |
515 | if ($self->using_freetds) { |
a3a526cc |
516 | $self->_dbh->do('COMMIT'); |
517 | } |
e97a6ee2 |
518 | return $self->next::method(@_); |
a3a526cc |
519 | } |
520 | |
521 | sub _dbh_rollback { |
522 | my $self = shift; |
e97a6ee2 |
523 | if ($self->using_freetds) { |
a3a526cc |
524 | $self->_dbh->do('ROLLBACK'); |
525 | } |
e97a6ee2 |
526 | return $self->next::method(@_); |
a3a526cc |
527 | } |
528 | |
1816be4f |
529 | # savepoint support using ASE syntax |
530 | |
531 | sub _svp_begin { |
532 | my ($self, $name) = @_; |
533 | |
534 | $self->dbh->do("SAVE TRANSACTION $name"); |
535 | } |
536 | |
537 | # A new SAVE TRANSACTION with the same name releases the previous one. |
538 | sub _svp_release { 1 } |
539 | |
540 | sub _svp_rollback { |
541 | my ($self, $name) = @_; |
542 | |
543 | $self->dbh->do("ROLLBACK TRANSACTION $name"); |
544 | } |
545 | |
3885cff6 |
546 | 1; |
547 | |
efe75aaa |
548 | =head1 Schema::Loader Support |
549 | |
550 | There is an experimental branch of L<DBIx::Class::Schema::Loader> that will |
551 | allow you to dump a schema from most (if not all) versions of Sybase. |
552 | |
553 | It is available via subversion from: |
554 | |
07a5866e |
555 | http://dev.catalyst.perl.org/repos/bast/branches/DBIx-Class-Schema-Loader/current/ |
efe75aaa |
556 | |
e97a6ee2 |
557 | =head1 FreeTDS |
558 | |
559 | This driver supports L<DBD::Sybase> compiled against FreeTDS |
560 | (L<http://www.freetds.org/>) to the best of our ability, however it is |
561 | recommended that you recompile L<DBD::Sybase> against the Sybase Open Client |
562 | libraries. They are a part of the Sybase ASE distribution: |
563 | |
564 | The Open Client FAQ is here: |
565 | L<http://www.isug.com/Sybase_FAQ/ASE/section7.html>. |
566 | |
567 | Sybase ASE for Linux (which comes with the Open Client libraries) may be |
568 | downloaded here: L<http://response.sybase.com/forms/ASE_Linux_Download>. |
569 | |
570 | To see if you're using FreeTDS check C<< $schema->storage->using_freetds >>, or run: |
571 | |
572 | perl -MDBI -le 'my $dbh = DBI->connect($dsn, $user, $pass); print $dbh->{syb_oc_version}' |
573 | |
574 | Some versions of the libraries involved will not support placeholders, in which |
575 | case the storage will be reblessed to |
576 | L<DBIx::Class::Storage::DBI::Sybase::NoBindVars>. |
577 | |
07a5866e |
578 | In some configurations, placeholders will work but will throw implicit type |
e97a6ee2 |
579 | conversion errors for anything that's not expecting a string. In such a case, |
07a5866e |
580 | the C<auto_cast> option from L<DBIx::Class::Storage::DBI::AutoCast> is |
581 | automatically set, which you may enable on connection with |
582 | L<DBIx::Class::Storage::DBI::AutoCast/connect_call_set_auto_cast>. The type info |
583 | for the C<CAST>s is taken from the L<DBIx::Class::ResultSource/data_type> |
584 | definitions in your Result classes, and are mapped to a Sybase type (if it isn't |
585 | already) using a mapping based on L<SQL::Translator>. |
e97a6ee2 |
586 | |
587 | In other configurations, placeholers will work just as they do with the Sybase |
588 | Open Client libraries. |
589 | |
590 | Inserts or updates of TEXT/IMAGE columns will B<NOT> work with FreeTDS. |
591 | |
41c93b1b |
592 | =head1 MAXIMUM CONNECTIONS |
593 | |
e97a6ee2 |
594 | The TDS protocol makes separate connections to the server for active statements |
595 | in the background. By default the number of such connections is limited to 25, |
596 | on both the client side and the server side. |
41c93b1b |
597 | |
e97a6ee2 |
598 | This is a bit too low for a complex L<DBIx::Class> application, so on connection |
599 | the client side setting is set to C<256> (see L<DBD::Sybase/maxConnect>.) You |
600 | can override it to whatever setting you like in the DSN. |
41c93b1b |
601 | |
602 | See |
603 | L<http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.ase_15.0.sag1/html/sag1/sag1272.htm> |
604 | for information on changing the setting on the server side. |
605 | |
c5ce7cd6 |
606 | =head1 DATES |
607 | |
3abafb11 |
608 | See L</connect_call_datetime_setup> to setup date formats |
609 | for L<DBIx::Class::InflateColumn::DateTime>. |
c5ce7cd6 |
610 | |
e97a6ee2 |
611 | =head1 TEXT/IMAGE COLUMNS |
63d46bb3 |
612 | |
a3a526cc |
613 | L<DBD::Sybase> compiled with FreeTDS will B<NOT> allow you to insert or update |
614 | C<TEXT/IMAGE> columns. |
615 | |
e97a6ee2 |
616 | Setting C<< $dbh->{LongReadLen} >> will also not work with FreeTDS use either: |
617 | |
618 | $schema->storage->dbh->do("SET TEXTSIZE $bytes"); |
a3a526cc |
619 | |
e97a6ee2 |
620 | or |
621 | |
622 | $schema->storage->set_textsize($bytes); |
a3a526cc |
623 | |
624 | instead. |
5703eb14 |
625 | |
e97a6ee2 |
626 | However, the C<LongReadLen> you pass in |
627 | L<DBIx::Class::Storage::DBI/connect_info> is used to execute the equivalent |
628 | C<SET TEXTSIZE> command on connection. |
629 | |
63d46bb3 |
630 | See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info> |
631 | setting you need to work with C<IMAGE> columns. |
632 | |
3885cff6 |
633 | =head1 AUTHORS |
634 | |
7e8cecc1 |
635 | See L<DBIx::Class/CONTRIBUTORS>. |
c5ce7cd6 |
636 | |
3885cff6 |
637 | =head1 LICENSE |
638 | |
639 | You may distribute this code under the same terms as Perl itself. |
640 | |
641 | =cut |
c5ce7cd6 |
642 | # vim:sts=2 sw=2: |