Commit | Line | Data |
057db5ce |
1 | package DBIx::Class::Storage::DBI::Sybase::ASE; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | use base qw/ |
fabbd5cc |
7 | DBIx::Class::Storage::DBI::Sybase |
8 | DBIx::Class::Storage::DBI::AutoCast |
9 | DBIx::Class::Storage::DBI::IdentityInsert |
057db5ce |
10 | /; |
11 | use mro 'c3'; |
70c28808 |
12 | use DBIx::Class::Carp; |
fabbd5cc |
13 | use Scalar::Util qw/blessed weaken/; |
ed7ab0f4 |
14 | use Try::Tiny; |
fabbd5cc |
15 | use Context::Preserve 'preserve_context'; |
514b84f6 |
16 | use DBIx::Class::_Util qw( sigwarn_silencer dbic_internal_try dump_value scope_guard set_subname ); |
fd323bf1 |
17 | use namespace::clean; |
057db5ce |
18 | |
048c2440 |
19 | __PACKAGE__->sql_limit_dialect ('GenericSubQ'); |
2b8cc2f2 |
20 | __PACKAGE__->sql_quote_char ([qw/[ ]/]); |
c6b7885f |
21 | __PACKAGE__->datetime_parser_type( |
22 | 'DBIx::Class::Storage::DBI::Sybase::ASE::DateTime::Format' |
23 | ); |
6a247f33 |
24 | |
057db5ce |
25 | __PACKAGE__->mk_group_accessors('simple' => |
fabbd5cc |
26 | qw/_identity _identity_method _blob_log_on_update _parent_storage |
27 | _writer_storage _is_writer_storage |
057db5ce |
28 | _bulk_storage _is_bulk_storage _began_bulk_work |
fabbd5cc |
29 | / |
057db5ce |
30 | ); |
31 | |
deabd575 |
32 | |
057db5ce |
33 | my @also_proxy_to_extra_storages = qw/ |
34 | connect_call_set_auto_cast auto_cast connect_call_blob_setup |
35 | connect_call_datetime_setup |
36 | |
37 | disconnect _connect_info _sql_maker _sql_maker_opts disable_sth_caching |
38 | auto_savepoint unsafe cursor_class debug debugobj schema |
39 | /; |
40 | |
41 | =head1 NAME |
42 | |
43 | DBIx::Class::Storage::DBI::Sybase::ASE - Sybase ASE SQL Server support for |
44 | DBIx::Class |
45 | |
46 | =head1 SYNOPSIS |
47 | |
48 | This subclass supports L<DBD::Sybase> for real (non-Microsoft) Sybase databases. |
49 | |
50 | =head1 DESCRIPTION |
51 | |
52 | If your version of Sybase does not support placeholders, then your storage will |
53 | be reblessed to L<DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars>. |
54 | You can also enable that driver explicitly, see the documentation for more |
55 | details. |
56 | |
57 | With this driver there is unfortunately no way to get the C<last_insert_id> |
58 | without doing a C<SELECT MAX(col)>. This is done safely in a transaction |
59 | (locking the table.) See L</INSERTS WITH PLACEHOLDERS>. |
60 | |
8384a713 |
61 | A recommended L<connect_info|DBIx::Class::Storage::DBI/connect_info> setting: |
057db5ce |
62 | |
63 | on_connect_call => [['datetime_setup'], ['blob_setup', log_on_update => 0]] |
64 | |
65 | =head1 METHODS |
66 | |
67 | =cut |
68 | |
69 | sub _rebless { |
70 | my $self = shift; |
71 | |
72 | my $no_bind_vars = __PACKAGE__ . '::NoBindVars'; |
73 | |
aca3b4c3 |
74 | if ($self->_using_freetds) { |
70171cd7 |
75 | carp_once <<'EOF' unless $ENV{DBIC_SYBASE_FREETDS_NOWARN}; |
057db5ce |
76 | |
77 | You are using FreeTDS with Sybase. |
78 | |
79 | We will do our best to support this configuration, but please consider this |
80 | support experimental. |
81 | |
82 | TEXT/IMAGE columns will definitely not work. |
83 | |
84 | You are encouraged to recompile DBD::Sybase with the Sybase Open Client libraries |
85 | instead. |
86 | |
87 | See perldoc DBIx::Class::Storage::DBI::Sybase::ASE for more details. |
88 | |
89 | To turn off this warning set the DBIC_SYBASE_FREETDS_NOWARN environment |
90 | variable. |
91 | EOF |
92 | |
bbdda281 |
93 | if (not $self->_use_typeless_placeholders) { |
94 | if ($self->_use_placeholders) { |
057db5ce |
95 | $self->auto_cast(1); |
96 | } |
97 | else { |
98 | $self->ensure_class_loaded($no_bind_vars); |
99 | bless $self, $no_bind_vars; |
100 | $self->_rebless; |
101 | } |
102 | } |
103 | } |
104 | |
105 | elsif (not $self->_get_dbh->{syb_dynamic_supported}) { |
106 | # not necessarily FreeTDS, but no placeholders nevertheless |
107 | $self->ensure_class_loaded($no_bind_vars); |
108 | bless $self, $no_bind_vars; |
109 | $self->_rebless; |
110 | } |
111 | # this is highly unlikely, but we check just in case |
bbdda281 |
112 | elsif (not $self->_use_typeless_placeholders) { |
057db5ce |
113 | $self->auto_cast(1); |
114 | } |
115 | } |
116 | |
117 | sub _init { |
118 | my $self = shift; |
bfec318f |
119 | |
120 | $self->next::method(@_); |
121 | |
122 | if ($self->_using_freetds && (my $ver = $self->_using_freetds_version||999) > 0.82) { |
123 | carp_once( |
5c6696c8 |
124 | "Buggy FreeTDS version $ver detected, statement caching will not work and " |
bfec318f |
125 | . 'will be disabled.' |
126 | ); |
127 | $self->disable_sth_caching(1); |
128 | } |
129 | |
057db5ce |
130 | $self->_set_max_connect(256); |
131 | |
132 | # create storage for insert/(update blob) transactions, |
133 | # unless this is that storage |
fabbd5cc |
134 | return if $self->_parent_storage; |
057db5ce |
135 | |
136 | my $writer_storage = (ref $self)->new; |
137 | |
fabbd5cc |
138 | $writer_storage->_is_writer_storage(1); # just info |
057db5ce |
139 | $writer_storage->connect_info($self->connect_info); |
140 | $writer_storage->auto_cast($self->auto_cast); |
141 | |
fabbd5cc |
142 | weaken ($writer_storage->{_parent_storage} = $self); |
057db5ce |
143 | $self->_writer_storage($writer_storage); |
144 | |
145 | # create a bulk storage unless connect_info is a coderef |
146 | return if ref($self->_dbi_connect_info->[0]) eq 'CODE'; |
147 | |
148 | my $bulk_storage = (ref $self)->new; |
149 | |
057db5ce |
150 | $bulk_storage->_is_bulk_storage(1); # for special ->disconnect acrobatics |
151 | $bulk_storage->connect_info($self->connect_info); |
152 | |
153 | # this is why |
154 | $bulk_storage->_dbi_connect_info->[0] .= ';bulkLogin=1'; |
155 | |
fabbd5cc |
156 | weaken ($bulk_storage->{_parent_storage} = $self); |
057db5ce |
157 | $self->_bulk_storage($bulk_storage); |
158 | } |
159 | |
160 | for my $method (@also_proxy_to_extra_storages) { |
161 | no strict 'refs'; |
162 | no warnings 'redefine'; |
163 | |
164 | my $replaced = __PACKAGE__->can($method); |
165 | |
514b84f6 |
166 | *{$method} = set_subname $method => sub { |
057db5ce |
167 | my $self = shift; |
168 | $self->_writer_storage->$replaced(@_) if $self->_writer_storage; |
169 | $self->_bulk_storage->$replaced(@_) if $self->_bulk_storage; |
170 | return $self->$replaced(@_); |
171 | }; |
172 | } |
173 | |
174 | sub disconnect { |
175 | my $self = shift; |
176 | |
177 | # Even though we call $sth->finish for uses off the bulk API, there's still an |
178 | # "active statement" warning on disconnect, which we throw away here. |
2a6dda4b |
179 | # This is due to the bug described in _insert_bulk. |
057db5ce |
180 | # Currently a noop because 'prepare' is used instead of 'prepare_cached'. |
052a832c |
181 | local $SIG{__WARN__} = sigwarn_silencer(qr/active statement/i) |
182 | if $self->_is_bulk_storage; |
057db5ce |
183 | |
184 | # so that next transaction gets a dbh |
185 | $self->_began_bulk_work(0) if $self->_is_bulk_storage; |
186 | |
187 | $self->next::method; |
188 | } |
189 | |
c1e5a9ac |
190 | # This is only invoked for FreeTDS drivers by ::Storage::DBI::Sybase::FreeTDS |
191 | sub _set_autocommit_stmt { |
192 | my ($self, $on) = @_; |
193 | |
194 | return 'SET CHAINED ' . ($on ? 'OFF' : 'ON'); |
195 | } |
196 | |
057db5ce |
197 | # Set up session settings for Sybase databases for the connection. |
198 | # |
199 | # Make sure we have CHAINED mode turned on if AutoCommit is off in non-FreeTDS |
200 | # DBD::Sybase (since we don't know how DBD::Sybase was compiled.) If however |
201 | # we're using FreeTDS, CHAINED mode turns on an implicit transaction which we |
202 | # only want when AutoCommit is off. |
057db5ce |
203 | sub _run_connection_actions { |
204 | my $self = shift; |
205 | |
206 | if ($self->_is_bulk_storage) { |
c1e5a9ac |
207 | # this should be cleared on every reconnect |
057db5ce |
208 | $self->_began_bulk_work(0); |
209 | return; |
210 | } |
211 | |
c1e5a9ac |
212 | $self->_dbh->{syb_chained_txn} = 1 |
aca3b4c3 |
213 | unless $self->_using_freetds; |
057db5ce |
214 | |
215 | $self->next::method(@_); |
216 | } |
217 | |
218 | =head2 connect_call_blob_setup |
219 | |
220 | Used as: |
221 | |
222 | on_connect_call => [ [ 'blob_setup', log_on_update => 0 ] ] |
223 | |
224 | Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary |
225 | instead of as a hex string. |
226 | |
227 | Recommended. |
228 | |
229 | Also sets the C<log_on_update> value for blob write operations. The default is |
230 | C<1>, but C<0> is better if your database is configured for it. |
231 | |
232 | See |
5529838f |
233 | L<DBD::Sybase/Handling IMAGE/TEXT data with syb_ct_get_data()/syb_ct_send_data()>. |
057db5ce |
234 | |
235 | =cut |
236 | |
237 | sub connect_call_blob_setup { |
238 | my $self = shift; |
239 | my %args = @_; |
240 | my $dbh = $self->_dbh; |
241 | $dbh->{syb_binary_images} = 1; |
242 | |
243 | $self->_blob_log_on_update($args{log_on_update}) |
244 | if exists $args{log_on_update}; |
245 | } |
246 | |
057db5ce |
247 | sub _is_lob_column { |
248 | my ($self, $source, $column) = @_; |
249 | |
250 | return $self->_is_lob_type($source->column_info($column)->{data_type}); |
251 | } |
252 | |
253 | sub _prep_for_execute { |
048c2440 |
254 | my ($self, $op, $ident, $args) = @_; |
fabbd5cc |
255 | |
048c2440 |
256 | my $limit; # extract and use shortcut on limit without offset |
257 | if ($op eq 'select' and ! $args->[4] and $limit = $args->[3]) { |
258 | $args = [ @$args ]; |
259 | $args->[3] = undef; |
260 | } |
261 | |
262 | my ($sql, $bind) = $self->next::method($op, $ident, $args); |
263 | |
264 | # $limit is already sanitized by now |
265 | $sql = join( "\n", |
266 | "SET ROWCOUNT $limit", |
267 | $sql, |
268 | "SET ROWCOUNT 0", |
269 | ) if $limit; |
057db5ce |
270 | |
fabbd5cc |
271 | if (my $identity_col = $self->_perform_autoinc_retrieval) { |
272 | $sql .= "\n" . $self->_fetch_identity_sql($ident, $identity_col) |
057db5ce |
273 | } |
274 | |
275 | return ($sql, $bind); |
276 | } |
277 | |
fabbd5cc |
278 | sub _fetch_identity_sql { |
279 | my ($self, $source, $col) = @_; |
057db5ce |
280 | |
fabbd5cc |
281 | return sprintf ("SELECT MAX(%s) FROM %s", |
282 | map { $self->sql_maker->_quote ($_) } ($col, $source->from) |
283 | ); |
057db5ce |
284 | } |
285 | |
286 | # Stolen from SQLT, with some modifications. This is a makeshift |
287 | # solution before a sane type-mapping library is available, thus |
288 | # the 'our' for easy overrides. |
289 | our %TYPE_MAPPING = ( |
290 | number => 'numeric', |
291 | money => 'money', |
292 | varchar => 'varchar', |
293 | varchar2 => 'varchar', |
294 | timestamp => 'datetime', |
295 | text => 'varchar', |
296 | real => 'double precision', |
297 | comment => 'text', |
298 | bit => 'bit', |
299 | tinyint => 'smallint', |
300 | float => 'double precision', |
301 | serial => 'numeric', |
302 | bigserial => 'numeric', |
303 | boolean => 'varchar', |
304 | long => 'varchar', |
305 | ); |
306 | |
307 | sub _native_data_type { |
308 | my ($self, $type) = @_; |
309 | |
310 | $type = lc $type; |
311 | $type =~ s/\s* identity//x; |
312 | |
313 | return uc($TYPE_MAPPING{$type} || $type); |
314 | } |
315 | |
057db5ce |
316 | |
317 | sub _execute { |
318 | my $self = shift; |
0e773352 |
319 | my ($rv, $sth, @bind) = $self->next::method(@_); |
057db5ce |
320 | |
044f5b3e |
321 | $self->_identity( ($sth->fetchall_arrayref)->[0][0] ) |
fabbd5cc |
322 | if $self->_perform_autoinc_retrieval; |
057db5ce |
323 | |
324 | return wantarray ? ($rv, $sth, @bind) : $rv; |
325 | } |
326 | |
327 | sub last_insert_id { shift->_identity } |
328 | |
329 | # handles TEXT/IMAGE and transaction for last_insert_id |
330 | sub insert { |
331 | my $self = shift; |
332 | my ($source, $to_insert) = @_; |
333 | |
e366f807 |
334 | my $columns_info = $source->columns_info; |
335 | |
7e017742 |
336 | my ($identity_col) = grep |
337 | { $columns_info->{$_}{is_auto_increment} } |
338 | keys %$columns_info |
339 | ; |
340 | |
341 | $identity_col = '' if ! defined $identity_col; |
057db5ce |
342 | |
fabbd5cc |
343 | # FIXME - this is duplication from DBI.pm. When refactored towards |
344 | # the LobWriter this can be folded back where it belongs. |
345 | local $self->{_autoinc_supplied_for_op} = exists $to_insert->{$identity_col} |
346 | ? 1 |
347 | : 0 |
348 | ; |
7e017742 |
349 | |
350 | local $self->{_perform_autoinc_retrieval} = $self->{_autoinc_supplied_for_op} |
351 | ? undef |
352 | : $identity_col |
fabbd5cc |
353 | ; |
354 | |
057db5ce |
355 | # check for empty insert |
356 | # INSERT INTO foo DEFAULT VALUES -- does not work with Sybase |
6469dabf |
357 | # try to insert explicit 'DEFAULT's instead (except for identity, timestamp |
358 | # and computed columns) |
057db5ce |
359 | if (not %$to_insert) { |
360 | for my $col ($source->columns) { |
361 | next if $col eq $identity_col; |
6469dabf |
362 | |
363 | my $info = $source->column_info($col); |
364 | |
365 | next if ref $info->{default_value} eq 'SCALAR' |
366 | || (exists $info->{data_type} && (not defined $info->{data_type})); |
367 | |
368 | next if $info->{data_type} && $info->{data_type} =~ /^timestamp\z/i; |
369 | |
057db5ce |
370 | $to_insert->{$col} = \'DEFAULT'; |
371 | } |
372 | } |
373 | |
374 | my $blob_cols = $self->_remove_blob_cols($source, $to_insert); |
375 | |
216f29d9 |
376 | # if a new txn is needed - it must happen on the _writer/new connection (for now) |
377 | my $guard; |
7e017742 |
378 | if ( |
216f29d9 |
379 | ! $self->transaction_depth |
380 | and |
381 | ( |
382 | $blob_cols |
383 | or |
384 | # do we need the horrific SELECT MAX(COL) hack? |
385 | ( |
386 | $self->_perform_autoinc_retrieval |
387 | and |
388 | ( ($self->_identity_method||'') ne '@@IDENTITY' ) |
389 | ) |
390 | ) |
057db5ce |
391 | ) { |
216f29d9 |
392 | $self = $self->_writer_storage; |
393 | $guard = $self->txn_scope_guard; |
7e017742 |
394 | } |
057db5ce |
395 | |
216f29d9 |
396 | my $updated_cols = $self->next::method ($source, $to_insert); |
057db5ce |
397 | |
7e017742 |
398 | $self->_insert_blobs ( |
399 | $source, |
400 | $blob_cols, |
401 | { |
402 | ( $identity_col |
403 | ? ( $identity_col => $self->last_insert_id($source, $identity_col) ) |
404 | : () |
405 | ), |
406 | %$to_insert, |
407 | %$updated_cols, |
408 | }, |
409 | ) if $blob_cols; |
057db5ce |
410 | |
216f29d9 |
411 | $guard->commit if $guard; |
412 | |
057db5ce |
413 | return $updated_cols; |
414 | } |
415 | |
416 | sub update { |
417 | my $self = shift; |
418 | my ($source, $fields, $where, @rest) = @_; |
419 | |
fabbd5cc |
420 | # |
421 | # When *updating* identities, ASE requires SET IDENTITY_UPDATE called |
422 | # |
423 | if (my $blob_cols = $self->_remove_blob_cols($source, $fields)) { |
057db5ce |
424 | |
fabbd5cc |
425 | # If there are any blobs in $where, Sybase will return a descriptive error |
426 | # message. |
427 | # XXX blobs can still be used with a LIKE query, and this should be handled. |
057db5ce |
428 | |
fabbd5cc |
429 | # update+blob update(s) done atomically on separate connection |
430 | $self = $self->_writer_storage; |
057db5ce |
431 | |
fabbd5cc |
432 | my $guard = $self->txn_scope_guard; |
057db5ce |
433 | |
fabbd5cc |
434 | # First update the blob columns to be updated to '' (taken from $fields, where |
435 | # it is originally put by _remove_blob_cols .) |
436 | my %blobs_to_empty = map { ($_ => delete $fields->{$_}) } keys %$blob_cols; |
057db5ce |
437 | |
fabbd5cc |
438 | # We can't only update NULL blobs, because blobs cannot be in the WHERE clause. |
439 | $self->next::method($source, \%blobs_to_empty, $where, @rest); |
057db5ce |
440 | |
fabbd5cc |
441 | # Now update the blobs before the other columns in case the update of other |
442 | # columns makes the search condition invalid. |
443 | my $rv = $self->_update_blobs($source, $blob_cols, $where); |
057db5ce |
444 | |
fabbd5cc |
445 | if (keys %$fields) { |
057db5ce |
446 | |
fabbd5cc |
447 | # Now set the identity update flags for the actual update |
87b12551 |
448 | local $self->{_autoinc_supplied_for_op} = grep |
fabbd5cc |
449 | { $_->{is_auto_increment} } |
450 | values %{ $source->columns_info([ keys %$fields ]) } |
87b12551 |
451 | ; |
057db5ce |
452 | |
fabbd5cc |
453 | my $next = $self->next::can; |
454 | my $args = \@_; |
455 | return preserve_context { |
456 | $self->$next(@$args); |
457 | } after => sub { $guard->commit }; |
057db5ce |
458 | } |
459 | else { |
fabbd5cc |
460 | $guard->commit; |
461 | return $rv; |
057db5ce |
462 | } |
463 | } |
fabbd5cc |
464 | else { |
465 | # Set the identity update flags for the actual update |
87b12551 |
466 | local $self->{_autoinc_supplied_for_op} = grep |
fabbd5cc |
467 | { $_->{is_auto_increment} } |
468 | values %{ $source->columns_info([ keys %$fields ]) } |
87b12551 |
469 | ; |
fabbd5cc |
470 | |
471 | return $self->next::method(@_); |
472 | } |
057db5ce |
473 | } |
474 | |
2a6dda4b |
475 | sub _insert_bulk { |
057db5ce |
476 | my $self = shift; |
477 | my ($source, $cols, $data) = @_; |
478 | |
e366f807 |
479 | my $columns_info = $source->columns_info; |
480 | |
87b12551 |
481 | my ($identity_col) = |
482 | grep { $columns_info->{$_}{is_auto_increment} } |
e366f807 |
483 | keys %$columns_info; |
057db5ce |
484 | |
fabbd5cc |
485 | # FIXME - this is duplication from DBI.pm. When refactored towards |
486 | # the LobWriter this can be folded back where it belongs. |
87b12551 |
487 | local $self->{_autoinc_supplied_for_op} |
488 | = grep { $_ eq $identity_col } @$cols; |
057db5ce |
489 | |
057db5ce |
490 | my $use_bulk_api = |
491 | $self->_bulk_storage && |
492 | $self->_get_dbh->{syb_has_blk}; |
493 | |
6d5679b2 |
494 | if (! $use_bulk_api and ref($self->_dbi_connect_info->[0]) eq 'CODE') { |
495 | carp_unique( join ' ', |
496 | 'Bulk API support disabled due to use of a CODEREF connect_info.', |
497 | 'Reverting to regular array inserts.', |
498 | ); |
057db5ce |
499 | } |
500 | |
501 | if (not $use_bulk_api) { |
502 | my $blob_cols = $self->_remove_blob_cols_array($source, $cols, $data); |
503 | |
52cef7e3 |
504 | # next::method uses a txn anyway, but it ends too early in case we need to |
057db5ce |
505 | # select max(col) to get the identity for inserting blobs. |
7e017742 |
506 | ($self, my $guard) = $self->transaction_depth |
507 | ? ($self, undef) |
508 | : ($self->_writer_storage, $self->_writer_storage->txn_scope_guard) |
509 | ; |
057db5ce |
510 | |
057db5ce |
511 | $self->next::method(@_); |
512 | |
513 | if ($blob_cols) { |
fabbd5cc |
514 | if ($self->_autoinc_supplied_for_op) { |
057db5ce |
515 | $self->_insert_blobs_array ($source, $blob_cols, $cols, $data); |
516 | } |
517 | else { |
518 | my @cols_with_identities = (@$cols, $identity_col); |
519 | |
520 | ## calculate identities |
521 | # XXX This assumes identities always increase by 1, which may or may not |
522 | # be true. |
523 | my ($last_identity) = |
524 | $self->_dbh->selectrow_array ( |
525 | $self->_fetch_identity_sql($source, $identity_col) |
526 | ); |
527 | my @identities = (($last_identity - @$data + 1) .. $last_identity); |
528 | |
529 | my @data_with_identities = map [@$_, shift @identities], @$data; |
530 | |
531 | $self->_insert_blobs_array ( |
532 | $source, $blob_cols, \@cols_with_identities, \@data_with_identities |
533 | ); |
534 | } |
535 | } |
536 | |
537 | $guard->commit if $guard; |
538 | |
539 | return; |
540 | } |
541 | |
542 | # otherwise, use the bulk API |
543 | |
544 | # rearrange @$data so that columns are in database order |
6d5679b2 |
545 | # and so we submit a full column list |
546 | my %orig_order = map { $cols->[$_] => $_ } 0..$#$cols; |
057db5ce |
547 | |
6d5679b2 |
548 | my @source_columns = $source->columns; |
549 | |
550 | # bcp identity index is 1-based |
87b12551 |
551 | my ($identity_idx) = grep { $source_columns[$_] eq $identity_col } (0..$#source_columns); |
6d5679b2 |
552 | $identity_idx = defined $identity_idx ? $identity_idx + 1 : 0; |
057db5ce |
553 | |
554 | my @new_data; |
6d5679b2 |
555 | for my $slice_idx (0..$#$data) { |
556 | push @new_data, [map { |
fabbd5cc |
557 | # identity data will be 'undef' if not _autoinc_supplied_for_op() |
6d5679b2 |
558 | # columns with defaults will also be 'undef' |
559 | exists $orig_order{$_} |
560 | ? $data->[$slice_idx][$orig_order{$_}] |
561 | : undef |
562 | } @source_columns]; |
057db5ce |
563 | } |
564 | |
6d5679b2 |
565 | my $proto_bind = $self->_resolve_bindattrs( |
566 | $source, |
567 | [map { |
568 | [ { dbic_colname => $source_columns[$_], _bind_data_slice_idx => $_ } |
569 | => $new_data[0][$_] ] |
570 | } (0 ..$#source_columns) ], |
571 | $columns_info |
572 | ); |
057db5ce |
573 | |
574 | ## Set a client-side conversion error handler, straight from DBD::Sybase docs. |
575 | # This ignores any data conversion errors detected by the client side libs, as |
576 | # they are usually harmless. |
577 | my $orig_cslib_cb = DBD::Sybase::set_cslib_cb( |
514b84f6 |
578 | set_subname _insert_bulk_cslib_errhandler => sub { |
057db5ce |
579 | my ($layer, $origin, $severity, $errno, $errmsg, $osmsg, $blkmsg) = @_; |
580 | |
581 | return 1 if $errno == 36; |
582 | |
583 | carp |
584 | "Layer: $layer, Origin: $origin, Severity: $severity, Error: $errno" . |
585 | ($errmsg ? "\n$errmsg" : '') . |
586 | ($osmsg ? "\n$osmsg" : '') . |
587 | ($blkmsg ? "\n$blkmsg" : ''); |
588 | |
589 | return 0; |
590 | }); |
591 | |
4edfce2f |
592 | my $exception = ''; |
ddcc02d1 |
593 | dbic_internal_try { |
057db5ce |
594 | my $bulk = $self->_bulk_storage; |
595 | |
596 | my $guard = $bulk->txn_scope_guard; |
597 | |
6d5679b2 |
598 | ## FIXME - once this is done - address the FIXME on finish() below |
057db5ce |
599 | ## XXX get this to work instead of our own $sth |
600 | ## will require SQLA or *Hacks changes for ordered columns |
601 | # $bulk->next::method($source, \@source_columns, \@new_data, { |
602 | # syb_bcp_attribs => { |
fabbd5cc |
603 | # identity_flag => $self->_autoinc_supplied_for_op ? 1 : 0, |
057db5ce |
604 | # identity_column => $identity_idx, |
605 | # } |
606 | # }); |
607 | my $sql = 'INSERT INTO ' . |
608 | $bulk->sql_maker->_quote($source->name) . ' (' . |
609 | # colname list is ignored for BCP, but does no harm |
610 | (join ', ', map $bulk->sql_maker->_quote($_), @source_columns) . ') '. |
611 | ' VALUES ('. (join ', ', ('?') x @source_columns) . ')'; |
612 | |
613 | ## XXX there's a bug in the DBD::Sybase bulk support that makes $sth->finish for |
614 | ## a prepare_cached statement ineffective. Replace with ->sth when fixed, or |
615 | ## better yet the version above. Should be fixed in DBD::Sybase . |
616 | my $sth = $bulk->_get_dbh->prepare($sql, |
617 | # 'insert', # op |
618 | { |
619 | syb_bcp_attribs => { |
fabbd5cc |
620 | identity_flag => $self->_autoinc_supplied_for_op ? 1 : 0, |
057db5ce |
621 | identity_column => $identity_idx, |
622 | } |
623 | } |
624 | ); |
625 | |
6d5679b2 |
626 | { |
627 | # FIXME the $sth->finish in _execute_array does a rollback for some |
628 | # reason. Disable it temporarily until we fix the SQLMaker thing above |
629 | no warnings 'redefine'; |
630 | no strict 'refs'; |
631 | local *{ref($sth).'::finish'} = sub {}; |
057db5ce |
632 | |
52cef7e3 |
633 | $self->_dbh_execute_for_fetch( |
6d5679b2 |
634 | $source, $sth, $proto_bind, \@source_columns, \@new_data |
635 | ); |
636 | } |
637 | |
638 | $guard->commit; |
057db5ce |
639 | |
640 | $bulk->_query_end($sql); |
ed7ab0f4 |
641 | } catch { |
642 | $exception = shift; |
057db5ce |
643 | }; |
644 | |
057db5ce |
645 | DBD::Sybase::set_cslib_cb($orig_cslib_cb); |
646 | |
647 | if ($exception =~ /-Y option/) { |
f32e99f9 |
648 | my $w = 'Sybase bulk API operation failed due to character set incompatibility, ' |
5241250d |
649 | . 'reverting to regular array inserts. Try unsetting the LC_ALL environment variable' |
f32e99f9 |
650 | ; |
651 | $w .= "\n$exception" if $self->debug; |
652 | carp $w; |
057db5ce |
653 | |
057db5ce |
654 | $self->_bulk_storage(undef); |
655 | unshift @_, $self; |
2a6dda4b |
656 | goto \&_insert_bulk; |
057db5ce |
657 | } |
658 | elsif ($exception) { |
659 | # rollback makes the bulkLogin connection unusable |
660 | $self->_bulk_storage->disconnect; |
661 | $self->throw_exception($exception); |
662 | } |
663 | } |
664 | |
057db5ce |
665 | # Make sure blobs are not bound as placeholders, and return any non-empty ones |
666 | # as a hash. |
667 | sub _remove_blob_cols { |
668 | my ($self, $source, $fields) = @_; |
669 | |
670 | my %blob_cols; |
671 | |
672 | for my $col (keys %$fields) { |
673 | if ($self->_is_lob_column($source, $col)) { |
674 | my $blob_val = delete $fields->{$col}; |
675 | if (not defined $blob_val) { |
676 | $fields->{$col} = \'NULL'; |
677 | } |
678 | else { |
679 | $fields->{$col} = \"''"; |
d52c4a75 |
680 | $blob_cols{$col} = $blob_val |
681 | if length $blob_val; |
057db5ce |
682 | } |
683 | } |
684 | } |
685 | |
686 | return %blob_cols ? \%blob_cols : undef; |
687 | } |
688 | |
2a6dda4b |
689 | # same for _insert_bulk |
057db5ce |
690 | sub _remove_blob_cols_array { |
691 | my ($self, $source, $cols, $data) = @_; |
692 | |
693 | my @blob_cols; |
694 | |
695 | for my $i (0..$#$cols) { |
696 | my $col = $cols->[$i]; |
697 | |
698 | if ($self->_is_lob_column($source, $col)) { |
699 | for my $j (0..$#$data) { |
700 | my $blob_val = delete $data->[$j][$i]; |
701 | if (not defined $blob_val) { |
702 | $data->[$j][$i] = \'NULL'; |
703 | } |
704 | else { |
705 | $data->[$j][$i] = \"''"; |
706 | $blob_cols[$j][$i] = $blob_val |
d52c4a75 |
707 | if length $blob_val; |
057db5ce |
708 | } |
709 | } |
710 | } |
711 | } |
712 | |
713 | return @blob_cols ? \@blob_cols : undef; |
714 | } |
715 | |
716 | sub _update_blobs { |
717 | my ($self, $source, $blob_cols, $where) = @_; |
718 | |
ddcc02d1 |
719 | my @primary_cols = dbic_internal_try |
56ad42bb |
720 | { $source->_pri_cols_or_die } |
9780718f |
721 | catch { |
722 | $self->throw_exception("Cannot update TEXT/IMAGE column(s): $_") |
723 | }; |
057db5ce |
724 | |
564986d6 |
725 | my @pks_to_update; |
726 | if ( |
727 | ref $where eq 'HASH' |
728 | and |
7e017742 |
729 | ! grep { ! defined $where->{$_} } @primary_cols |
564986d6 |
730 | ) { |
057db5ce |
731 | my %row_to_update; |
732 | @row_to_update{@primary_cols} = @{$where}{@primary_cols}; |
564986d6 |
733 | @pks_to_update = \%row_to_update; |
734 | } |
735 | else { |
057db5ce |
736 | my $cursor = $self->select ($source, \@primary_cols, $where, {}); |
564986d6 |
737 | @pks_to_update = map { |
057db5ce |
738 | my %row; @row{@primary_cols} = @$_; \%row |
739 | } $cursor->all; |
740 | } |
741 | |
564986d6 |
742 | for my $ident (@pks_to_update) { |
743 | $self->_insert_blobs($source, $blob_cols, $ident); |
057db5ce |
744 | } |
745 | } |
746 | |
747 | sub _insert_blobs { |
7e017742 |
748 | my ($self, $source, $blob_cols, $row_data) = @_; |
057db5ce |
749 | |
750 | my $table = $source->name; |
751 | |
ddcc02d1 |
752 | my @primary_cols = dbic_internal_try |
56ad42bb |
753 | { $source->_pri_cols_or_die } |
9780718f |
754 | catch { |
755 | $self->throw_exception("Cannot update TEXT/IMAGE column(s): $_") |
756 | }; |
057db5ce |
757 | |
758 | $self->throw_exception('Cannot update TEXT/IMAGE column(s) without primary key values') |
7e017742 |
759 | if grep { ! defined $row_data->{$_} } @primary_cols; |
760 | |
b8e92dac |
761 | # if we are 2-phase inserting a blob - there is nothing to retrieve anymore, |
762 | # regardless of the previous state of the flag |
763 | local $self->{_perform_autoinc_retrieval} |
764 | if $self->_perform_autoinc_retrieval; |
765 | |
7e017742 |
766 | my %where = map {( $_ => $row_data->{$_} )} @primary_cols; |
057db5ce |
767 | |
768 | for my $col (keys %$blob_cols) { |
769 | my $blob = $blob_cols->{$col}; |
770 | |
057db5ce |
771 | my $cursor = $self->select ($source, [$col], \%where, {}); |
772 | $cursor->next; |
773 | my $sth = $cursor->sth; |
774 | |
775 | if (not $sth) { |
057db5ce |
776 | $self->throw_exception( |
777 | "Could not find row in table '$table' for blob update:\n" |
8fc4291e |
778 | . dump_value \%where |
057db5ce |
779 | ); |
780 | } |
781 | |
f9670042 |
782 | # FIXME - it is not clear if this is needed at all. But it's been |
783 | # there since 2009 ( d867eedaa ), might as well let sleeping dogs |
784 | # lie... sigh. |
785 | weaken( my $wsth = $sth ); |
786 | my $g = scope_guard { $wsth->finish if $wsth }; |
787 | |
ddcc02d1 |
788 | dbic_internal_try { |
057db5ce |
789 | do { |
790 | $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr; |
791 | } while $sth->fetch; |
792 | |
793 | $sth->func('ct_prepare_send') or die $sth->errstr; |
794 | |
795 | my $log_on_update = $self->_blob_log_on_update; |
796 | $log_on_update = 1 if not defined $log_on_update; |
797 | |
798 | $sth->func('CS_SET', 1, { |
799 | total_txtlen => length($blob), |
800 | log_on_update => $log_on_update |
801 | }, 'ct_data_info') or die $sth->errstr; |
802 | |
803 | $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr; |
804 | |
805 | $sth->func('ct_finish_send') or die $sth->errstr; |
9780718f |
806 | } |
807 | catch { |
aca3b4c3 |
808 | if ($self->_using_freetds) { |
057db5ce |
809 | $self->throw_exception ( |
9780718f |
810 | "TEXT/IMAGE operation failed, probably because you are using FreeTDS: $_" |
057db5ce |
811 | ); |
9780718f |
812 | } |
813 | else { |
814 | $self->throw_exception($_); |
057db5ce |
815 | } |
9780718f |
816 | }; |
057db5ce |
817 | } |
818 | } |
819 | |
820 | sub _insert_blobs_array { |
821 | my ($self, $source, $blob_cols, $cols, $data) = @_; |
822 | |
823 | for my $i (0..$#$data) { |
824 | my $datum = $data->[$i]; |
825 | |
826 | my %row; |
827 | @row{ @$cols } = @$datum; |
828 | |
829 | my %blob_vals; |
830 | for my $j (0..$#$cols) { |
831 | if (exists $blob_cols->[$i][$j]) { |
832 | $blob_vals{ $cols->[$j] } = $blob_cols->[$i][$j]; |
833 | } |
834 | } |
835 | |
836 | $self->_insert_blobs ($source, \%blob_vals, \%row); |
837 | } |
838 | } |
839 | |
840 | =head2 connect_call_datetime_setup |
841 | |
842 | Used as: |
843 | |
844 | on_connect_call => 'datetime_setup' |
845 | |
8384a713 |
846 | In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set: |
057db5ce |
847 | |
848 | $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z |
849 | $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080 |
850 | |
c1e5a9ac |
851 | This works for both C<DATETIME> and C<SMALLDATETIME> columns, note that |
057db5ce |
852 | C<SMALLDATETIME> columns only have minute precision. |
853 | |
854 | =cut |
855 | |
70c28808 |
856 | sub connect_call_datetime_setup { |
857 | my $self = shift; |
858 | my $dbh = $self->_get_dbh; |
057db5ce |
859 | |
70c28808 |
860 | if ($dbh->can('syb_date_fmt')) { |
861 | # amazingly, this works with FreeTDS |
862 | $dbh->syb_date_fmt('ISO_strict'); |
863 | } |
864 | else { |
865 | carp_once |
866 | 'Your DBD::Sybase is too old to support ' |
867 | .'DBIx::Class::InflateColumn::DateTime, please upgrade!'; |
057db5ce |
868 | |
c6b7885f |
869 | # FIXME - in retrospect this is a rather bad US-centric choice |
870 | # of format. Not changing as a bugwards compat, though in reality |
871 | # the only piece that sees the results of $dt object formatting |
872 | # (as opposed to parsing) is the database itself, so theoretically |
873 | # changing both this SET command and the formatter definition of |
874 | # ::S::D::Sybase::ASE::DateTime::Format below should be safe and |
875 | # transparent |
876 | |
057db5ce |
877 | $dbh->do('SET DATEFORMAT mdy'); |
057db5ce |
878 | } |
879 | } |
880 | |
057db5ce |
881 | |
90d7422f |
882 | sub _exec_txn_begin { |
057db5ce |
883 | my $self = shift; |
884 | |
885 | # bulkLogin=1 connections are always in a transaction, and can only call BEGIN |
886 | # TRAN once. However, we need to make sure there's a $dbh. |
887 | return if $self->_is_bulk_storage && $self->_dbh && $self->_began_bulk_work; |
888 | |
889 | $self->next::method(@_); |
890 | |
057db5ce |
891 | $self->_began_bulk_work(1) if $self->_is_bulk_storage; |
892 | } |
893 | |
057db5ce |
894 | # savepoint support using ASE syntax |
895 | |
90d7422f |
896 | sub _exec_svp_begin { |
057db5ce |
897 | my ($self, $name) = @_; |
898 | |
90d7422f |
899 | $self->_dbh->do("SAVE TRANSACTION $name"); |
057db5ce |
900 | } |
901 | |
902 | # A new SAVE TRANSACTION with the same name releases the previous one. |
90d7422f |
903 | sub _exec_svp_release { 1 } |
057db5ce |
904 | |
90d7422f |
905 | sub _exec_svp_rollback { |
057db5ce |
906 | my ($self, $name) = @_; |
907 | |
90d7422f |
908 | $self->_dbh->do("ROLLBACK TRANSACTION $name"); |
057db5ce |
909 | } |
910 | |
deabd575 |
911 | package # hide from PAUSE |
912 | DBIx::Class::Storage::DBI::Sybase::ASE::DateTime::Format; |
913 | |
914 | my $datetime_parse_format = '%Y-%m-%dT%H:%M:%S.%3NZ'; |
915 | my $datetime_format_format = '%m/%d/%Y %H:%M:%S.%3N'; |
916 | |
917 | my ($datetime_parser, $datetime_formatter); |
918 | |
919 | sub parse_datetime { |
920 | shift; |
921 | require DateTime::Format::Strptime; |
922 | $datetime_parser ||= DateTime::Format::Strptime->new( |
923 | pattern => $datetime_parse_format, |
924 | on_error => 'croak', |
925 | ); |
926 | return $datetime_parser->parse_datetime(shift); |
927 | } |
928 | |
929 | sub format_datetime { |
930 | shift; |
931 | require DateTime::Format::Strptime; |
932 | $datetime_formatter ||= DateTime::Format::Strptime->new( |
933 | pattern => $datetime_format_format, |
934 | on_error => 'croak', |
935 | ); |
936 | return $datetime_formatter->format_datetime(shift); |
937 | } |
938 | |
057db5ce |
939 | 1; |
940 | |
941 | =head1 Schema::Loader Support |
942 | |
290da7d6 |
943 | As of version C<0.05000>, L<DBIx::Class::Schema::Loader> should work well with |
c1e5a9ac |
944 | most versions of Sybase ASE. |
057db5ce |
945 | |
946 | =head1 FreeTDS |
947 | |
948 | This driver supports L<DBD::Sybase> compiled against FreeTDS |
949 | (L<http://www.freetds.org/>) to the best of our ability, however it is |
950 | recommended that you recompile L<DBD::Sybase> against the Sybase Open Client |
951 | libraries. They are a part of the Sybase ASE distribution: |
952 | |
953 | The Open Client FAQ is here: |
954 | L<http://www.isug.com/Sybase_FAQ/ASE/section7.html>. |
955 | |
956 | Sybase ASE for Linux (which comes with the Open Client libraries) may be |
957 | downloaded here: L<http://response.sybase.com/forms/ASE_Linux_Download>. |
958 | |
aca3b4c3 |
959 | To see if you're using FreeTDS run: |
057db5ce |
960 | |
961 | perl -MDBI -le 'my $dbh = DBI->connect($dsn, $user, $pass); print $dbh->{syb_oc_version}' |
962 | |
c1e5a9ac |
963 | It is recommended to set C<tds version> for your ASE server to C<5.0> in |
964 | C</etc/freetds/freetds.conf>. |
965 | |
966 | Some versions or configurations of the libraries involved will not support |
967 | placeholders, in which case the storage will be reblessed to |
057db5ce |
968 | L<DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars>. |
969 | |
970 | In some configurations, placeholders will work but will throw implicit type |
971 | conversion errors for anything that's not expecting a string. In such a case, |
972 | the C<auto_cast> option from L<DBIx::Class::Storage::DBI::AutoCast> is |
973 | automatically set, which you may enable on connection with |
c1e5a9ac |
974 | L<connect_call_set_auto_cast|DBIx::Class::Storage::DBI::AutoCast/connect_call_set_auto_cast>. |
975 | The type info for the C<CAST>s is taken from the |
976 | L<DBIx::Class::ResultSource/data_type> definitions in your Result classes, and |
977 | are mapped to a Sybase type (if it isn't already) using a mapping based on |
978 | L<SQL::Translator>. |
057db5ce |
979 | |
48580715 |
980 | In other configurations, placeholders will work just as they do with the Sybase |
057db5ce |
981 | Open Client libraries. |
982 | |
983 | Inserts or updates of TEXT/IMAGE columns will B<NOT> work with FreeTDS. |
984 | |
985 | =head1 INSERTS WITH PLACEHOLDERS |
986 | |
987 | With placeholders enabled, inserts are done in a transaction so that there are |
988 | no concurrency issues with getting the inserted identity value using |
989 | C<SELECT MAX(col)>, which is the only way to get the C<IDENTITY> value in this |
990 | mode. |
991 | |
992 | In addition, they are done on a separate connection so that it's possible to |
993 | have active cursors when doing an insert. |
994 | |
995 | When using C<DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars> transactions |
c1e5a9ac |
996 | are unnecessary and not used, as there are no concurrency issues with C<SELECT |
997 | @@IDENTITY> which is a session variable. |
057db5ce |
998 | |
999 | =head1 TRANSACTIONS |
1000 | |
c1e5a9ac |
1001 | Due to limitations of the TDS protocol and L<DBD::Sybase>, you cannot begin a |
1002 | transaction while there are active cursors, nor can you use multiple active |
1003 | cursors within a transaction. An active cursor is, for example, a |
057db5ce |
1004 | L<ResultSet|DBIx::Class::ResultSet> that has been executed using C<next> or |
1005 | C<first> but has not been exhausted or L<reset|DBIx::Class::ResultSet/reset>. |
1006 | |
1007 | For example, this will not work: |
1008 | |
1009 | $schema->txn_do(sub { |
1010 | my $rs = $schema->resultset('Book'); |
47d7b769 |
1011 | while (my $result = $rs->next) { |
057db5ce |
1012 | $schema->resultset('MetaData')->create({ |
47d7b769 |
1013 | book_id => $result->id, |
057db5ce |
1014 | ... |
1015 | }); |
1016 | } |
1017 | }); |
1018 | |
1019 | This won't either: |
1020 | |
1021 | my $first_row = $large_rs->first; |
1022 | $schema->txn_do(sub { ... }); |
1023 | |
1024 | Transactions done for inserts in C<AutoCommit> mode when placeholders are in use |
1025 | are not affected, as they are done on an extra database handle. |
1026 | |
1027 | Some workarounds: |
1028 | |
1029 | =over 4 |
1030 | |
1031 | =item * use L<DBIx::Class::Storage::DBI::Replicated> |
1032 | |
1033 | =item * L<connect|DBIx::Class::Schema/connect> another L<Schema|DBIx::Class::Schema> |
1034 | |
1035 | =item * load the data from your cursor with L<DBIx::Class::ResultSet/all> |
1036 | |
1037 | =back |
1038 | |
1039 | =head1 MAXIMUM CONNECTIONS |
1040 | |
1041 | The TDS protocol makes separate connections to the server for active statements |
1042 | in the background. By default the number of such connections is limited to 25, |
1043 | on both the client side and the server side. |
1044 | |
1045 | This is a bit too low for a complex L<DBIx::Class> application, so on connection |
1046 | the client side setting is set to C<256> (see L<DBD::Sybase/maxConnect>.) You |
1047 | can override it to whatever setting you like in the DSN. |
1048 | |
1049 | See |
1050 | L<http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.ase_15.0.sag1/html/sag1/sag1272.htm> |
1051 | for information on changing the setting on the server side. |
1052 | |
1053 | =head1 DATES |
1054 | |
1055 | See L</connect_call_datetime_setup> to setup date formats |
1056 | for L<DBIx::Class::InflateColumn::DateTime>. |
1057 | |
9c510ba5 |
1058 | =head1 LIMITED QUERIES |
1059 | |
5529838f |
1060 | Because ASE does not have a good way to limit results in SQL that works for |
1061 | all types of queries, the limit dialect is set to |
1062 | L<GenericSubQ|DBIx::Class::SQLMaker::LimitDialects/GenericSubQ>. |
9c510ba5 |
1063 | |
1064 | Fortunately, ASE and L<DBD::Sybase> support cursors properly, so when |
5529838f |
1065 | L<GenericSubQ|DBIx::Class::SQLMaker::LimitDialects/GenericSubQ> is too slow |
1066 | you can use the L<software_limit|DBIx::Class::ResultSet/software_limit> |
1067 | L<DBIx::Class::ResultSet> attribute to simulate limited queries by skipping |
1068 | over records. |
9c510ba5 |
1069 | |
057db5ce |
1070 | =head1 TEXT/IMAGE COLUMNS |
1071 | |
1072 | L<DBD::Sybase> compiled with FreeTDS will B<NOT> allow you to insert or update |
1073 | C<TEXT/IMAGE> columns. |
1074 | |
1075 | Setting C<< $dbh->{LongReadLen} >> will also not work with FreeTDS use either: |
1076 | |
1077 | $schema->storage->dbh->do("SET TEXTSIZE $bytes"); |
1078 | |
1079 | or |
1080 | |
1081 | $schema->storage->set_textsize($bytes); |
1082 | |
1083 | instead. |
1084 | |
1085 | However, the C<LongReadLen> you pass in |
8384a713 |
1086 | L<connect_info|DBIx::Class::Storage::DBI/connect_info> is used to execute the |
1087 | equivalent C<SET TEXTSIZE> command on connection. |
057db5ce |
1088 | |
8384a713 |
1089 | See L</connect_call_blob_setup> for a |
1090 | L<connect_info|DBIx::Class::Storage::DBI/connect_info> setting you need to work |
1091 | with C<IMAGE> columns. |
057db5ce |
1092 | |
1093 | =head1 BULK API |
1094 | |
1095 | The experimental L<DBD::Sybase> Bulk API support is used for |
1096 | L<populate|DBIx::Class::ResultSet/populate> in B<void> context, in a transaction |
1097 | on a separate connection. |
1098 | |
1099 | To use this feature effectively, use a large number of rows for each |
1100 | L<populate|DBIx::Class::ResultSet/populate> call, eg.: |
1101 | |
1102 | while (my $rows = $data_source->get_100_rows()) { |
1103 | $rs->populate($rows); |
1104 | } |
1105 | |
1106 | B<NOTE:> the L<add_columns|DBIx::Class::ResultSource/add_columns> |
1107 | calls in your C<Result> classes B<must> list columns in database order for this |
5241250d |
1108 | to work. Also, you may have to unset the C<LC_ALL> environment variable before |
c1e5a9ac |
1109 | loading your app, as C<BCP -Y> is not yet supported in DBD::Sybase . |
057db5ce |
1110 | |
1111 | When inserting IMAGE columns using this method, you'll need to use |
1112 | L</connect_call_blob_setup> as well. |
1113 | |
6476fd66 |
1114 | =head1 COMPUTED COLUMNS |
1115 | |
1116 | If you have columns such as: |
1117 | |
1118 | created_dtm AS getdate() |
1119 | |
1120 | represent them in your Result classes as: |
1121 | |
1122 | created_dtm => { |
1123 | data_type => undef, |
1124 | default_value => \'getdate()', |
1125 | is_nullable => 0, |
c1e5a9ac |
1126 | inflate_datetime => 1, |
6476fd66 |
1127 | } |
1128 | |
1129 | The C<data_type> must exist and must be C<undef>. Then empty inserts will work |
1130 | on tables with such columns. |
1131 | |
1132 | =head1 TIMESTAMP COLUMNS |
1133 | |
1134 | C<timestamp> columns in Sybase ASE are not really timestamps, see: |
1135 | L<http://dba.fyicenter.com/Interview-Questions/SYBASE/The_timestamp_datatype_in_Sybase_.html>. |
1136 | |
1137 | They should be defined in your Result classes as: |
1138 | |
1139 | ts => { |
1140 | data_type => 'timestamp', |
1141 | is_nullable => 0, |
1142 | inflate_datetime => 0, |
1143 | } |
1144 | |
1145 | The C<<inflate_datetime => 0>> is necessary if you use |
1146 | L<DBIx::Class::InflateColumn::DateTime>, and most people do, and still want to |
1147 | be able to read these values. |
1148 | |
1149 | The values will come back as hexadecimal. |
1150 | |
057db5ce |
1151 | =head1 TODO |
1152 | |
1153 | =over |
1154 | |
1155 | =item * |
1156 | |
1157 | Transitions to AutoCommit=0 (starting a transaction) mode by exhausting |
1158 | any active cursors, using eager cursors. |
1159 | |
1160 | =item * |
1161 | |
1162 | Real limits and limited counts using stored procedures deployed on startup. |
1163 | |
1164 | =item * |
1165 | |
057db5ce |
1166 | Blob update with a LIKE query on a blob, without invalidating the WHERE condition. |
1167 | |
1168 | =item * |
1169 | |
1170 | bulk_insert using prepare_cached (see comments.) |
1171 | |
1172 | =back |
1173 | |
a2bd3796 |
1174 | =head1 FURTHER QUESTIONS? |
057db5ce |
1175 | |
a2bd3796 |
1176 | Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>. |
057db5ce |
1177 | |
a2bd3796 |
1178 | =head1 COPYRIGHT AND LICENSE |
057db5ce |
1179 | |
a2bd3796 |
1180 | This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE> |
1181 | by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can |
1182 | redistribute it and/or modify it under the same terms as the |
1183 | L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>. |