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/; |
289877b0 |
12 | use List::Util (); |
6b1f5ef7 |
13 | |
285baccb |
14 | __PACKAGE__->mk_group_accessors('simple' => |
a3a526cc |
15 | qw/_identity _blob_log_on_update _auto_cast _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> |
f6de7111 |
35 | without doing a C<SELECT MAX(col)>. |
98259fe4 |
36 | |
37 | But your queries will be cached. |
38 | |
8c4b6c50 |
39 | You need a version of L<DBD::Sybase> compiled with the Sybase OpenClient |
40 | libraries, B<NOT> FreeTDS, for placeholder support. Otherwise your storage will |
41 | be automatically reblessed into C<::NoBindVars>. |
5703eb14 |
42 | |
61cfaef7 |
43 | A recommended L<DBIx::Class::Storage::DBI/connect_info> setting: |
98259fe4 |
44 | |
61cfaef7 |
45 | on_connect_call => [['datetime_setup'], ['blob_setup', log_on_update => 0]] |
98259fe4 |
46 | |
47 | =head1 METHODS |
48 | |
49 | =cut |
50 | |
47d9646a |
51 | sub _rebless { |
b50a5275 |
52 | my $self = shift; |
c5ce7cd6 |
53 | |
54 | if (ref($self) eq 'DBIx::Class::Storage::DBI::Sybase') { |
55 | my $dbtype = eval { |
56 | @{$self->dbh->selectrow_arrayref(qq{sp_server_info \@attribute_id=1})}[2] |
57 | } || ''; |
58 | |
59 | my $exception = $@; |
60 | $dbtype =~ s/\W/_/gi; |
61 | my $subclass = "DBIx::Class::Storage::DBI::Sybase::${dbtype}"; |
62 | |
63 | if (!$exception && $dbtype && $self->load_optional_class($subclass)) { |
64 | bless $self, $subclass; |
65 | $self->_rebless; |
5703eb14 |
66 | } else { # real Sybase |
67 | my $no_bind_vars = 'DBIx::Class::Storage::DBI::Sybase::NoBindVars'; |
68 | |
a3a526cc |
69 | # This is reset to 0 in ::NoBindVars, only necessary because we use max(col) to |
70 | # get the identity. |
71 | $self->_insert_txn(1); |
72 | |
8c4b6c50 |
73 | if ($self->_using_freetds) { |
a3a526cc |
74 | carp <<'EOF' unless $ENV{DBIC_SYBASE_FREETDS_NOWARN}; |
75 | |
76 | You are using FreeTDS with Sybase. |
5703eb14 |
77 | |
a3a526cc |
78 | We will do our best to support this configuration, but please consider this |
79 | support experimental. |
5703eb14 |
80 | |
a3a526cc |
81 | TEXT/IMAGE columns will definitely not work. |
8c4b6c50 |
82 | |
a3a526cc |
83 | You are encouraged to recompile DBD::Sybase with the Sybase OpenClient libraries |
84 | instead. |
5703eb14 |
85 | |
86 | See perldoc DBIx::Class::Storage::DBI::Sybase for more details. |
a3a526cc |
87 | |
88 | To turn off this warning set the DBIC_SYBASE_FREETDS_NOWARN environment |
89 | variable. |
5703eb14 |
90 | EOF |
a3a526cc |
91 | if (not $self->_placeholders_with_type_conversion_supported) { |
92 | if ($self->_placeholders_supported) { |
93 | $self->_auto_cast(1); |
94 | } else { |
95 | $self->ensure_class_loaded($no_bind_vars); |
96 | bless $self, $no_bind_vars; |
97 | $self->_rebless; |
98 | } |
99 | } |
683f73ec |
100 | } |
61cfaef7 |
101 | |
102 | if (not $self->dbh->{syb_dynamic_supported}) { |
103 | $self->ensure_class_loaded($no_bind_vars); |
104 | bless $self, $no_bind_vars; |
105 | $self->_rebless; |
106 | } |
107 | |
a3a526cc |
108 | $self->_set_max_connect(256); |
47d9646a |
109 | } |
c5ce7cd6 |
110 | } |
b50a5275 |
111 | } |
112 | |
a3a526cc |
113 | # Make sure we have CHAINED mode turned on if AutoCommit is off in non-FreeTDS |
114 | # DBD::Sybase (since we don't know how DBD::Sybase was compiled.) If however |
115 | # we're using FreeTDS, CHAINED mode turns on an implicit transaction which we |
116 | # only want when AutoCommit is off. |
f6de7111 |
117 | sub _populate_dbh { |
118 | my $self = shift; |
41c93b1b |
119 | |
a3a526cc |
120 | $self->next::method(@_); |
41c93b1b |
121 | |
a3a526cc |
122 | if (not $self->_using_freetds) { |
123 | $self->_dbh->{syb_chained_txn} = 1; |
124 | } else { |
125 | if ($self->_dbh_autocommit) { |
126 | $self->_dbh->do('SET CHAINED OFF'); |
127 | } else { |
128 | $self->_dbh->do('SET CHAINED ON'); |
129 | } |
41c93b1b |
130 | } |
131 | } |
132 | |
63d46bb3 |
133 | =head2 connect_call_blob_setup |
134 | |
135 | Used as: |
136 | |
61cfaef7 |
137 | on_connect_call => [ [ 'blob_setup', log_on_update => 0 ] ] |
63d46bb3 |
138 | |
139 | Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary |
140 | instead of as a hex string. |
141 | |
6636ad53 |
142 | Recommended. |
143 | |
fd5a07e4 |
144 | Also sets the C<log_on_update> value for blob write operations. The default is |
145 | C<1>, but C<0> is better if your database is configured for it. |
146 | |
147 | See |
148 | L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>. |
149 | |
63d46bb3 |
150 | =cut |
151 | |
152 | sub connect_call_blob_setup { |
153 | my $self = shift; |
fd5a07e4 |
154 | my %args = @_; |
63d46bb3 |
155 | my $dbh = $self->_dbh; |
156 | $dbh->{syb_binary_images} = 1; |
fd5a07e4 |
157 | |
158 | $self->_blob_log_on_update($args{log_on_update}) |
159 | if exists $args{log_on_update}; |
160 | } |
161 | |
162 | sub _is_lob_type { |
163 | my $self = shift; |
5703eb14 |
164 | my $type = shift; |
078a332f |
165 | $type && $type =~ /(?:text|image|lob|bytea|binary|memo)/i; |
fd5a07e4 |
166 | } |
167 | |
a3a526cc |
168 | # The select-piggybacking-on-insert trick stolen from odbc/mssql |
285baccb |
169 | sub _prep_for_execute { |
170 | my $self = shift; |
171 | my ($op, $extra_bind, $ident, $args) = @_; |
172 | |
173 | my ($sql, $bind) = $self->next::method (@_); |
174 | |
a3a526cc |
175 | # Some combinations of FreeTDS and Sybase throw implicit conversion errors for |
176 | # all placeeholders, so we convert them into CASTs here. |
177 | # Based on code in ::DBI::NoBindVars . |
178 | # |
179 | # If we're using ::NoBindVars, there are no binds by this point so this code |
180 | # gets skippeed. |
181 | if ($self->_auto_cast && @$bind) { |
182 | my $new_sql; |
183 | my @sql_part = split /\?/, $sql; |
184 | my $col_info = $self->_resolve_column_info($ident,[ map $_->[0], @$bind ]); |
185 | |
186 | foreach my $bound (@$bind) { |
187 | my $col = $bound->[0]; |
188 | my $syb_type = $self->_syb_base_type($col_info->{$col}{data_type}); |
189 | |
190 | foreach my $data (@{$bound}[1..$#$bound]) { |
191 | $new_sql .= shift(@sql_part) . |
192 | ($syb_type ? "CAST(? AS $syb_type)" : '?'); |
193 | } |
194 | } |
195 | $new_sql .= join '', @sql_part; |
196 | $sql = $new_sql; |
197 | } |
198 | |
285baccb |
199 | if ($op eq 'insert') { |
285baccb |
200 | my $table = $ident->from; |
201 | |
a3a526cc |
202 | my $bind_info = $self->_resolve_column_info( |
203 | $ident, [map $_->[0], @{$bind}] |
204 | ); |
ec15b3fe |
205 | my $identity_col = |
285baccb |
206 | List::Util::first { $bind_info->{$_}{is_auto_increment} } (keys %$bind_info); |
207 | |
208 | if ($identity_col) { |
ec15b3fe |
209 | $sql = |
210 | "SET IDENTITY_INSERT $table ON\n" . |
211 | "$sql\n" . |
212 | "SET IDENTITY_INSERT $table OFF" |
285baccb |
213 | } else { |
214 | $identity_col = List::Util::first { |
215 | $ident->column_info($_)->{is_auto_increment} |
216 | } $ident->columns; |
217 | } |
218 | |
219 | if ($identity_col) { |
285baccb |
220 | $sql = |
285baccb |
221 | "$sql\n" . |
a3a526cc |
222 | $self->_fetch_identity_sql($ident, $identity_col); |
285baccb |
223 | } |
224 | } |
225 | |
226 | return ($sql, $bind); |
227 | } |
228 | |
a3a526cc |
229 | # Stolen from SQLT, with some modifications. This will likely change when the |
230 | # SQLT Sybase stuff is redone/fixed-up. |
231 | my %TYPE_MAPPING = ( |
232 | number => 'numeric', |
233 | money => 'money', |
234 | varchar => 'varchar', |
235 | varchar2 => 'varchar', |
236 | timestamp => 'datetime', |
237 | text => 'varchar', |
238 | real => 'double precision', |
239 | comment => 'text', |
240 | bit => 'bit', |
241 | tinyint => 'smallint', |
242 | float => 'double precision', |
243 | serial => 'numeric', |
244 | bigserial => 'numeric', |
245 | boolean => 'varchar', |
246 | long => 'varchar', |
247 | ); |
248 | |
249 | sub _syb_base_type { |
250 | my ($self, $type) = @_; |
251 | |
252 | $type = lc $type; |
253 | $type =~ s/ identity//; |
254 | |
255 | return uc($TYPE_MAPPING{$type} || $type); |
256 | } |
257 | |
285baccb |
258 | sub _fetch_identity_sql { |
259 | my ($self, $source, $col) = @_; |
260 | |
261 | return "SELECT MAX($col) FROM ".$source->from; |
262 | } |
263 | |
264 | sub _execute { |
265 | my $self = shift; |
266 | my ($op) = @_; |
267 | |
268 | my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_); |
269 | |
270 | if ($op eq 'insert') { |
271 | $self->_identity($sth->fetchrow_array); |
272 | $sth->finish; |
273 | } |
274 | |
275 | return wantarray ? ($rv, $sth, @bind) : $rv; |
276 | } |
277 | |
278 | sub last_insert_id { shift->_identity } |
279 | |
a3a526cc |
280 | # override to handle TEXT/IMAGE and to do a transaction if necessary |
fd5a07e4 |
281 | sub insert { |
7d17f469 |
282 | my ($self, $source, $to_insert) = splice @_, 0, 3; |
289877b0 |
283 | my $dbh = $self->_dbh; |
7d17f469 |
284 | |
285 | my $blob_cols = $self->_remove_blob_cols($source, $to_insert); |
286 | |
a3a526cc |
287 | # We have to do the insert in a transaction to avoid race conditions with the |
288 | # SELECT MAX(COL) identity method used when placeholders are enabled. |
f6de7111 |
289 | my $updated_cols = do { |
a3a526cc |
290 | if ($self->_insert_txn && (not $self->{transaction_depth})) { |
291 | my $args = \@_; |
292 | my $method = $self->next::can; |
293 | $self->txn_do( |
294 | sub { $self->$method($source, $to_insert, @$args) } |
295 | ); |
296 | } else { |
297 | $self->next::method($source, $to_insert, @_); |
298 | } |
f6de7111 |
299 | }; |
7d17f469 |
300 | |
078a332f |
301 | $self->_insert_blobs($source, $blob_cols, $to_insert) if %$blob_cols; |
7d17f469 |
302 | |
303 | return $updated_cols; |
304 | } |
305 | |
078a332f |
306 | sub update { |
307 | my ($self, $source) = splice @_, 0, 2; |
308 | my ($fields, $where) = @_; |
309 | my $wantarray = wantarray; |
310 | |
311 | my $blob_cols = $self->_remove_blob_cols($source, $fields); |
312 | |
313 | my @res; |
314 | if ($wantarray) { |
315 | @res = $self->next::method($source, @_); |
316 | } else { |
317 | $res[0] = $self->next::method($source, @_); |
318 | } |
319 | |
320 | $self->_update_blobs($source, $blob_cols, $where) if %$blob_cols; |
321 | |
322 | return $wantarray ? @res : $res[0]; |
323 | } |
7d17f469 |
324 | |
325 | sub _remove_blob_cols { |
326 | my ($self, $source, $fields) = @_; |
fd5a07e4 |
327 | |
328 | my %blob_cols; |
329 | |
7d17f469 |
330 | for my $col (keys %$fields) { |
9b3dabe0 |
331 | if ($self->_is_lob_type($source->column_info($col)->{data_type})) { |
332 | $blob_cols{$col} = delete $fields->{$col}; |
333 | $fields->{$col} = \"''"; |
334 | } |
fd5a07e4 |
335 | } |
336 | |
7d17f469 |
337 | return \%blob_cols; |
fd5a07e4 |
338 | } |
339 | |
340 | sub _update_blobs { |
078a332f |
341 | my ($self, $source, $blob_cols, $where) = @_; |
342 | |
343 | my (@primary_cols) = $source->primary_columns; |
344 | |
345 | croak "Cannot update TEXT/IMAGE column(s) without a primary key" |
346 | unless @primary_cols; |
347 | |
348 | # check if we're updating a single row by PK |
349 | my $pk_cols_in_where = 0; |
350 | for my $col (@primary_cols) { |
351 | $pk_cols_in_where++ if defined $where->{$col}; |
352 | } |
353 | my @rows; |
354 | |
355 | if ($pk_cols_in_where == @primary_cols) { |
356 | my %row_to_update; |
357 | @row_to_update{@primary_cols} = @{$where}{@primary_cols}; |
358 | @rows = \%row_to_update; |
359 | } else { |
360 | my $rs = $source->resultset->search( |
361 | $where, |
362 | { |
363 | result_class => 'DBIx::Class::ResultClass::HashRefInflator', |
364 | select => \@primary_cols |
365 | } |
366 | ); |
367 | @rows = $rs->all; # statement must finish |
368 | } |
369 | |
370 | for my $row (@rows) { |
371 | $self->_insert_blobs($source, $blob_cols, $row); |
372 | } |
373 | } |
374 | |
375 | sub _insert_blobs { |
376 | my ($self, $source, $blob_cols, $row) = @_; |
fd5a07e4 |
377 | my $dbh = $self->dbh; |
378 | |
379 | my $table = $source->from; |
380 | |
078a332f |
381 | my %row = %$row; |
fd5a07e4 |
382 | my (@primary_cols) = $source->primary_columns; |
383 | |
9b3dabe0 |
384 | croak "Cannot update TEXT/IMAGE column(s) without a primary key" |
fd5a07e4 |
385 | unless @primary_cols; |
386 | |
078a332f |
387 | if ((grep { defined $row{$_} } @primary_cols) != @primary_cols) { |
9b3dabe0 |
388 | if (@primary_cols == 1) { |
389 | my $col = $primary_cols[0]; |
078a332f |
390 | $row{$col} = $self->last_insert_id($source, $col); |
9b3dabe0 |
391 | } else { |
392 | croak "Cannot update TEXT/IMAGE column(s) without primary key values"; |
393 | } |
394 | } |
fd5a07e4 |
395 | |
396 | for my $col (keys %$blob_cols) { |
397 | my $blob = $blob_cols->{$col}; |
9b3dabe0 |
398 | my $sth; |
fd5a07e4 |
399 | |
a3a526cc |
400 | my %where = map { ($_, $row{$_}) } @primary_cols; |
401 | my $cursor = $source->resultset->search(\%where, { |
402 | select => [$col] |
403 | })->cursor; |
404 | $cursor->next; |
405 | $sth = $cursor->sth; |
fd5a07e4 |
406 | |
407 | eval { |
a3a526cc |
408 | do { |
fd5a07e4 |
409 | $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr; |
a3a526cc |
410 | } while $sth->fetch; |
411 | |
fd5a07e4 |
412 | $sth->func('ct_prepare_send') or die $sth->errstr; |
413 | |
414 | my $log_on_update = $self->_blob_log_on_update; |
415 | $log_on_update = 1 if not defined $log_on_update; |
416 | |
417 | $sth->func('CS_SET', 1, { |
418 | total_txtlen => length($blob), |
419 | log_on_update => $log_on_update |
420 | }, 'ct_data_info') or die $sth->errstr; |
421 | |
422 | $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr; |
423 | |
424 | $sth->func('ct_finish_send') or die $sth->errstr; |
425 | }; |
426 | my $exception = $@; |
a3a526cc |
427 | $sth->finish if $sth; |
428 | if ($exception) { |
429 | if ($self->_using_freetds) { |
430 | croak |
431 | "TEXT/IMAGE operation failed, probably because you're using FreeTDS: " . |
432 | $exception; |
433 | } else { |
434 | croak $exception; |
435 | } |
436 | } |
fd5a07e4 |
437 | } |
63d46bb3 |
438 | } |
439 | |
9539eeb1 |
440 | =head2 connect_call_datetime_setup |
441 | |
442 | Used as: |
443 | |
444 | on_connect_call => 'datetime_setup' |
445 | |
446 | In L<DBIx::Class::Storage::DBI/connect_info> to set: |
447 | |
3abafb11 |
448 | $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z |
449 | $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080 |
9539eeb1 |
450 | |
451 | On connection for use with L<DBIx::Class::InflateColumn::DateTime>, using |
3abafb11 |
452 | L<DateTime::Format::Sybase>, which you will need to install. |
453 | |
454 | This works for both C<DATETIME> and C<SMALLDATETIME> columns, although |
455 | C<SMALLDATETIME> columns only have minute precision. |
9539eeb1 |
456 | |
457 | =cut |
458 | |
9041a97a |
459 | { |
460 | my $old_dbd_warned = 0; |
461 | |
9539eeb1 |
462 | sub connect_call_datetime_setup { |
6b1f5ef7 |
463 | my $self = shift; |
6b1f5ef7 |
464 | my $dbh = $self->_dbh; |
465 | |
466 | if ($dbh->can('syb_date_fmt')) { |
467 | $dbh->syb_date_fmt('ISO_strict'); |
468 | } elsif (not $old_dbd_warned) { |
469 | carp "Your DBD::Sybase is too old to support ". |
470 | "DBIx::Class::InflateColumn::DateTime, please upgrade!"; |
471 | $old_dbd_warned = 1; |
472 | } |
473 | |
474 | $dbh->do('set dateformat mdy'); |
c5ce7cd6 |
475 | |
6b1f5ef7 |
476 | 1; |
c5ce7cd6 |
477 | } |
6b1f5ef7 |
478 | } |
479 | |
6636ad53 |
480 | sub datetime_parser_type { "DateTime::Format::Sybase" } |
481 | |
a3a526cc |
482 | # ->begin_work and such have no effect with FreeTDS |
483 | |
484 | sub _dbh_begin_work { |
485 | my $self = shift; |
486 | if (not $self->_using_freetds) { |
487 | return $self->next::method(@_); |
488 | } else { |
489 | $self->dbh->do('BEGIN TRAN'); |
490 | } |
491 | } |
492 | |
493 | sub _dbh_commit { |
494 | my $self = shift; |
495 | if (not $self->_using_freetds) { |
496 | return $self->next::method(@_); |
497 | } else { |
498 | $self->_dbh->do('COMMIT'); |
499 | } |
500 | } |
501 | |
502 | sub _dbh_rollback { |
503 | my $self = shift; |
504 | if (not $self->_using_freetds) { |
505 | return $self->next::method(@_); |
506 | } else { |
507 | $self->_dbh->do('ROLLBACK'); |
508 | } |
509 | } |
510 | |
1816be4f |
511 | # savepoint support using ASE syntax |
512 | |
513 | sub _svp_begin { |
514 | my ($self, $name) = @_; |
515 | |
516 | $self->dbh->do("SAVE TRANSACTION $name"); |
517 | } |
518 | |
519 | # A new SAVE TRANSACTION with the same name releases the previous one. |
520 | sub _svp_release { 1 } |
521 | |
522 | sub _svp_rollback { |
523 | my ($self, $name) = @_; |
524 | |
525 | $self->dbh->do("ROLLBACK TRANSACTION $name"); |
526 | } |
527 | |
3885cff6 |
528 | 1; |
529 | |
41c93b1b |
530 | =head1 MAXIMUM CONNECTIONS |
531 | |
532 | L<DBD::Sybase> makes separate connections to the server for active statements in |
533 | the background. By default the number of such connections is limited to 25, on |
534 | both the client side and the server side. |
535 | |
536 | This is a bit too low, so on connection the clientside setting is set to C<256> |
537 | (see L<DBD::Sybase/maxConnect>.) You can override it to whatever setting you |
538 | like in the DSN. |
539 | |
540 | See |
541 | L<http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.ase_15.0.sag1/html/sag1/sag1272.htm> |
542 | for information on changing the setting on the server side. |
543 | |
c5ce7cd6 |
544 | =head1 DATES |
545 | |
3abafb11 |
546 | See L</connect_call_datetime_setup> to setup date formats |
547 | for L<DBIx::Class::InflateColumn::DateTime>. |
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548 | |
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549 | =head1 IMAGE AND TEXT COLUMNS |
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550 | |
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551 | L<DBD::Sybase> compiled with FreeTDS will B<NOT> allow you to insert or update |
552 | C<TEXT/IMAGE> columns. |
553 | |
554 | C<< $dbh->{LongReadLen} >> will also not work with FreeTDS use: |
555 | |
556 | $schema->storage->dbh->do("SET TEXTSIZE <bytes>") |
557 | |
558 | instead. |
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559 | |
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560 | See L</connect_call_blob_setup> for a L<DBIx::Class::Storage::DBI/connect_info> |
561 | setting you need to work with C<IMAGE> columns. |
562 | |
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563 | =head1 AUTHORS |
564 | |
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565 | See L<DBIx::Class/CONTRIBUTORS>. |
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566 | |
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567 | =head1 LICENSE |
568 | |
569 | You may distribute this code under the same terms as Perl itself. |
570 | |
571 | =cut |
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572 | # vim:sts=2 sw=2: |