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/; |
6298a324 |
14 | use List::Util 'first'; |
057db5ce |
15 | use Sub::Name(); |
6298a324 |
16 | use Data::Dumper::Concise 'Dumper'; |
ed7ab0f4 |
17 | use Try::Tiny; |
fabbd5cc |
18 | use Context::Preserve 'preserve_context'; |
fd323bf1 |
19 | use namespace::clean; |
057db5ce |
20 | |
048c2440 |
21 | __PACKAGE__->sql_limit_dialect ('GenericSubQ'); |
2b8cc2f2 |
22 | __PACKAGE__->sql_quote_char ([qw/[ ]/]); |
c6b7885f |
23 | __PACKAGE__->datetime_parser_type( |
24 | 'DBIx::Class::Storage::DBI::Sybase::ASE::DateTime::Format' |
25 | ); |
6a247f33 |
26 | |
057db5ce |
27 | __PACKAGE__->mk_group_accessors('simple' => |
fabbd5cc |
28 | qw/_identity _identity_method _blob_log_on_update _parent_storage |
29 | _writer_storage _is_writer_storage |
057db5ce |
30 | _bulk_storage _is_bulk_storage _began_bulk_work |
fabbd5cc |
31 | / |
057db5ce |
32 | ); |
33 | |
deabd575 |
34 | |
057db5ce |
35 | my @also_proxy_to_extra_storages = qw/ |
36 | connect_call_set_auto_cast auto_cast connect_call_blob_setup |
37 | connect_call_datetime_setup |
38 | |
39 | disconnect _connect_info _sql_maker _sql_maker_opts disable_sth_caching |
40 | auto_savepoint unsafe cursor_class debug debugobj schema |
41 | /; |
42 | |
43 | =head1 NAME |
44 | |
45 | DBIx::Class::Storage::DBI::Sybase::ASE - Sybase ASE SQL Server support for |
46 | DBIx::Class |
47 | |
48 | =head1 SYNOPSIS |
49 | |
50 | This subclass supports L<DBD::Sybase> for real (non-Microsoft) Sybase databases. |
51 | |
52 | =head1 DESCRIPTION |
53 | |
54 | If your version of Sybase does not support placeholders, then your storage will |
55 | be reblessed to L<DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars>. |
56 | You can also enable that driver explicitly, see the documentation for more |
57 | details. |
58 | |
59 | With this driver there is unfortunately no way to get the C<last_insert_id> |
60 | without doing a C<SELECT MAX(col)>. This is done safely in a transaction |
61 | (locking the table.) See L</INSERTS WITH PLACEHOLDERS>. |
62 | |
8384a713 |
63 | A recommended L<connect_info|DBIx::Class::Storage::DBI/connect_info> setting: |
057db5ce |
64 | |
65 | on_connect_call => [['datetime_setup'], ['blob_setup', log_on_update => 0]] |
66 | |
67 | =head1 METHODS |
68 | |
69 | =cut |
70 | |
71 | sub _rebless { |
72 | my $self = shift; |
73 | |
74 | my $no_bind_vars = __PACKAGE__ . '::NoBindVars'; |
75 | |
aca3b4c3 |
76 | if ($self->_using_freetds) { |
70171cd7 |
77 | carp_once <<'EOF' unless $ENV{DBIC_SYBASE_FREETDS_NOWARN}; |
057db5ce |
78 | |
79 | You are using FreeTDS with Sybase. |
80 | |
81 | We will do our best to support this configuration, but please consider this |
82 | support experimental. |
83 | |
84 | TEXT/IMAGE columns will definitely not work. |
85 | |
86 | You are encouraged to recompile DBD::Sybase with the Sybase Open Client libraries |
87 | instead. |
88 | |
89 | See perldoc DBIx::Class::Storage::DBI::Sybase::ASE for more details. |
90 | |
91 | To turn off this warning set the DBIC_SYBASE_FREETDS_NOWARN environment |
92 | variable. |
93 | EOF |
94 | |
bbdda281 |
95 | if (not $self->_use_typeless_placeholders) { |
96 | if ($self->_use_placeholders) { |
057db5ce |
97 | $self->auto_cast(1); |
98 | } |
99 | else { |
100 | $self->ensure_class_loaded($no_bind_vars); |
101 | bless $self, $no_bind_vars; |
102 | $self->_rebless; |
103 | } |
104 | } |
105 | } |
106 | |
107 | elsif (not $self->_get_dbh->{syb_dynamic_supported}) { |
108 | # not necessarily FreeTDS, but no placeholders nevertheless |
109 | $self->ensure_class_loaded($no_bind_vars); |
110 | bless $self, $no_bind_vars; |
111 | $self->_rebless; |
112 | } |
113 | # this is highly unlikely, but we check just in case |
bbdda281 |
114 | elsif (not $self->_use_typeless_placeholders) { |
057db5ce |
115 | $self->auto_cast(1); |
116 | } |
117 | } |
118 | |
119 | sub _init { |
120 | my $self = shift; |
bfec318f |
121 | |
122 | $self->next::method(@_); |
123 | |
124 | if ($self->_using_freetds && (my $ver = $self->_using_freetds_version||999) > 0.82) { |
125 | carp_once( |
5c6696c8 |
126 | "Buggy FreeTDS version $ver detected, statement caching will not work and " |
bfec318f |
127 | . 'will be disabled.' |
128 | ); |
129 | $self->disable_sth_caching(1); |
130 | } |
131 | |
057db5ce |
132 | $self->_set_max_connect(256); |
133 | |
134 | # create storage for insert/(update blob) transactions, |
135 | # unless this is that storage |
fabbd5cc |
136 | return if $self->_parent_storage; |
057db5ce |
137 | |
138 | my $writer_storage = (ref $self)->new; |
139 | |
fabbd5cc |
140 | $writer_storage->_is_writer_storage(1); # just info |
057db5ce |
141 | $writer_storage->connect_info($self->connect_info); |
142 | $writer_storage->auto_cast($self->auto_cast); |
143 | |
fabbd5cc |
144 | weaken ($writer_storage->{_parent_storage} = $self); |
057db5ce |
145 | $self->_writer_storage($writer_storage); |
146 | |
147 | # create a bulk storage unless connect_info is a coderef |
148 | return if ref($self->_dbi_connect_info->[0]) eq 'CODE'; |
149 | |
150 | my $bulk_storage = (ref $self)->new; |
151 | |
057db5ce |
152 | $bulk_storage->_is_bulk_storage(1); # for special ->disconnect acrobatics |
153 | $bulk_storage->connect_info($self->connect_info); |
154 | |
155 | # this is why |
156 | $bulk_storage->_dbi_connect_info->[0] .= ';bulkLogin=1'; |
157 | |
fabbd5cc |
158 | weaken ($bulk_storage->{_parent_storage} = $self); |
057db5ce |
159 | $self->_bulk_storage($bulk_storage); |
160 | } |
161 | |
162 | for my $method (@also_proxy_to_extra_storages) { |
163 | no strict 'refs'; |
164 | no warnings 'redefine'; |
165 | |
166 | my $replaced = __PACKAGE__->can($method); |
167 | |
168 | *{$method} = Sub::Name::subname $method => sub { |
169 | my $self = shift; |
170 | $self->_writer_storage->$replaced(@_) if $self->_writer_storage; |
171 | $self->_bulk_storage->$replaced(@_) if $self->_bulk_storage; |
172 | return $self->$replaced(@_); |
173 | }; |
174 | } |
175 | |
176 | sub disconnect { |
177 | my $self = shift; |
178 | |
179 | # Even though we call $sth->finish for uses off the bulk API, there's still an |
180 | # "active statement" warning on disconnect, which we throw away here. |
181 | # This is due to the bug described in insert_bulk. |
182 | # Currently a noop because 'prepare' is used instead of 'prepare_cached'. |
183 | local $SIG{__WARN__} = sub { |
184 | warn $_[0] unless $_[0] =~ /active statement/i; |
185 | } if $self->_is_bulk_storage; |
186 | |
187 | # so that next transaction gets a dbh |
188 | $self->_began_bulk_work(0) if $self->_is_bulk_storage; |
189 | |
190 | $self->next::method; |
191 | } |
192 | |
c1e5a9ac |
193 | # This is only invoked for FreeTDS drivers by ::Storage::DBI::Sybase::FreeTDS |
194 | sub _set_autocommit_stmt { |
195 | my ($self, $on) = @_; |
196 | |
197 | return 'SET CHAINED ' . ($on ? 'OFF' : 'ON'); |
198 | } |
199 | |
057db5ce |
200 | # Set up session settings for Sybase databases for the connection. |
201 | # |
202 | # Make sure we have CHAINED mode turned on if AutoCommit is off in non-FreeTDS |
203 | # DBD::Sybase (since we don't know how DBD::Sybase was compiled.) If however |
204 | # we're using FreeTDS, CHAINED mode turns on an implicit transaction which we |
205 | # only want when AutoCommit is off. |
057db5ce |
206 | sub _run_connection_actions { |
207 | my $self = shift; |
208 | |
209 | if ($self->_is_bulk_storage) { |
c1e5a9ac |
210 | # this should be cleared on every reconnect |
057db5ce |
211 | $self->_began_bulk_work(0); |
212 | return; |
213 | } |
214 | |
c1e5a9ac |
215 | $self->_dbh->{syb_chained_txn} = 1 |
aca3b4c3 |
216 | unless $self->_using_freetds; |
057db5ce |
217 | |
218 | $self->next::method(@_); |
219 | } |
220 | |
221 | =head2 connect_call_blob_setup |
222 | |
223 | Used as: |
224 | |
225 | on_connect_call => [ [ 'blob_setup', log_on_update => 0 ] ] |
226 | |
227 | Does C<< $dbh->{syb_binary_images} = 1; >> to return C<IMAGE> data as raw binary |
228 | instead of as a hex string. |
229 | |
230 | Recommended. |
231 | |
232 | Also sets the C<log_on_update> value for blob write operations. The default is |
233 | C<1>, but C<0> is better if your database is configured for it. |
234 | |
235 | See |
236 | L<DBD::Sybase/Handling_IMAGE/TEXT_data_with_syb_ct_get_data()/syb_ct_send_data()>. |
237 | |
238 | =cut |
239 | |
240 | sub connect_call_blob_setup { |
241 | my $self = shift; |
242 | my %args = @_; |
243 | my $dbh = $self->_dbh; |
244 | $dbh->{syb_binary_images} = 1; |
245 | |
246 | $self->_blob_log_on_update($args{log_on_update}) |
247 | if exists $args{log_on_update}; |
248 | } |
249 | |
057db5ce |
250 | sub _is_lob_column { |
251 | my ($self, $source, $column) = @_; |
252 | |
253 | return $self->_is_lob_type($source->column_info($column)->{data_type}); |
254 | } |
255 | |
256 | sub _prep_for_execute { |
048c2440 |
257 | my ($self, $op, $ident, $args) = @_; |
fabbd5cc |
258 | |
259 | # |
260 | ### This is commented out because all tests pass. However I am leaving it |
261 | ### here as it may prove necessary (can't think through all combinations) |
262 | ### BTW it doesn't currently work exactly - need better sensitivity to |
263 | # currently set value |
264 | # |
4b8a53ea |
265 | #my ($op, $ident) = @_; |
266 | # |
fabbd5cc |
267 | # inherit these from the parent for the duration of _prep_for_execute |
268 | # Don't know how to make a localizing loop with if's, otherwise I would |
269 | #local $self->{_autoinc_supplied_for_op} |
270 | # = $self->_parent_storage->_autoinc_supplied_for_op |
271 | #if ($op eq 'insert' or $op eq 'update') and $self->_parent_storage; |
272 | #local $self->{_perform_autoinc_retrieval} |
273 | # = $self->_parent_storage->_perform_autoinc_retrieval |
274 | #if ($op eq 'insert' or $op eq 'update') and $self->_parent_storage; |
057db5ce |
275 | |
048c2440 |
276 | my $limit; # extract and use shortcut on limit without offset |
277 | if ($op eq 'select' and ! $args->[4] and $limit = $args->[3]) { |
278 | $args = [ @$args ]; |
279 | $args->[3] = undef; |
280 | } |
281 | |
282 | my ($sql, $bind) = $self->next::method($op, $ident, $args); |
283 | |
284 | # $limit is already sanitized by now |
285 | $sql = join( "\n", |
286 | "SET ROWCOUNT $limit", |
287 | $sql, |
288 | "SET ROWCOUNT 0", |
289 | ) if $limit; |
057db5ce |
290 | |
fabbd5cc |
291 | if (my $identity_col = $self->_perform_autoinc_retrieval) { |
292 | $sql .= "\n" . $self->_fetch_identity_sql($ident, $identity_col) |
057db5ce |
293 | } |
294 | |
295 | return ($sql, $bind); |
296 | } |
297 | |
fabbd5cc |
298 | sub _fetch_identity_sql { |
299 | my ($self, $source, $col) = @_; |
057db5ce |
300 | |
fabbd5cc |
301 | return sprintf ("SELECT MAX(%s) FROM %s", |
302 | map { $self->sql_maker->_quote ($_) } ($col, $source->from) |
303 | ); |
057db5ce |
304 | } |
305 | |
306 | # Stolen from SQLT, with some modifications. This is a makeshift |
307 | # solution before a sane type-mapping library is available, thus |
308 | # the 'our' for easy overrides. |
309 | our %TYPE_MAPPING = ( |
310 | number => 'numeric', |
311 | money => 'money', |
312 | varchar => 'varchar', |
313 | varchar2 => 'varchar', |
314 | timestamp => 'datetime', |
315 | text => 'varchar', |
316 | real => 'double precision', |
317 | comment => 'text', |
318 | bit => 'bit', |
319 | tinyint => 'smallint', |
320 | float => 'double precision', |
321 | serial => 'numeric', |
322 | bigserial => 'numeric', |
323 | boolean => 'varchar', |
324 | long => 'varchar', |
325 | ); |
326 | |
327 | sub _native_data_type { |
328 | my ($self, $type) = @_; |
329 | |
330 | $type = lc $type; |
331 | $type =~ s/\s* identity//x; |
332 | |
333 | return uc($TYPE_MAPPING{$type} || $type); |
334 | } |
335 | |
057db5ce |
336 | |
337 | sub _execute { |
338 | my $self = shift; |
0e773352 |
339 | my ($rv, $sth, @bind) = $self->next::method(@_); |
057db5ce |
340 | |
044f5b3e |
341 | $self->_identity( ($sth->fetchall_arrayref)->[0][0] ) |
fabbd5cc |
342 | if $self->_perform_autoinc_retrieval; |
057db5ce |
343 | |
344 | return wantarray ? ($rv, $sth, @bind) : $rv; |
345 | } |
346 | |
347 | sub last_insert_id { shift->_identity } |
348 | |
349 | # handles TEXT/IMAGE and transaction for last_insert_id |
350 | sub insert { |
351 | my $self = shift; |
352 | my ($source, $to_insert) = @_; |
353 | |
e366f807 |
354 | my $columns_info = $source->columns_info; |
355 | |
6298a324 |
356 | my $identity_col = |
e366f807 |
357 | (first { $columns_info->{$_}{is_auto_increment} } |
358 | keys %$columns_info ) |
6298a324 |
359 | || ''; |
057db5ce |
360 | |
fabbd5cc |
361 | # FIXME - this is duplication from DBI.pm. When refactored towards |
362 | # the LobWriter this can be folded back where it belongs. |
363 | local $self->{_autoinc_supplied_for_op} = exists $to_insert->{$identity_col} |
364 | ? 1 |
365 | : 0 |
366 | ; |
367 | local $self->{_perform_autoinc_retrieval} = |
368 | ($identity_col and ! exists $to_insert->{$identity_col}) |
369 | ? $identity_col |
370 | : undef |
371 | ; |
372 | |
057db5ce |
373 | # check for empty insert |
374 | # INSERT INTO foo DEFAULT VALUES -- does not work with Sybase |
6469dabf |
375 | # try to insert explicit 'DEFAULT's instead (except for identity, timestamp |
376 | # and computed columns) |
057db5ce |
377 | if (not %$to_insert) { |
378 | for my $col ($source->columns) { |
379 | next if $col eq $identity_col; |
6469dabf |
380 | |
381 | my $info = $source->column_info($col); |
382 | |
383 | next if ref $info->{default_value} eq 'SCALAR' |
384 | || (exists $info->{data_type} && (not defined $info->{data_type})); |
385 | |
386 | next if $info->{data_type} && $info->{data_type} =~ /^timestamp\z/i; |
387 | |
057db5ce |
388 | $to_insert->{$col} = \'DEFAULT'; |
389 | } |
390 | } |
391 | |
392 | my $blob_cols = $self->_remove_blob_cols($source, $to_insert); |
393 | |
394 | # do we need the horrific SELECT MAX(COL) hack? |
fabbd5cc |
395 | my $need_dumb_last_insert_id = ( |
396 | $self->_perform_autoinc_retrieval |
397 | && |
398 | ($self->_identity_method||'') ne '@@IDENTITY' |
399 | ); |
057db5ce |
400 | |
401 | my $next = $self->next::can; |
402 | |
403 | # we are already in a transaction, or there are no blobs |
404 | # and we don't need the PK - just (try to) do it |
405 | if ($self->{transaction_depth} |
fabbd5cc |
406 | || (!$blob_cols && !$need_dumb_last_insert_id) |
057db5ce |
407 | ) { |
408 | return $self->_insert ( |
409 | $next, $source, $to_insert, $blob_cols, $identity_col |
410 | ); |
411 | } |
412 | |
413 | # otherwise use the _writer_storage to do the insert+transaction on another |
414 | # connection |
415 | my $guard = $self->_writer_storage->txn_scope_guard; |
416 | |
417 | my $updated_cols = $self->_writer_storage->_insert ( |
418 | $next, $source, $to_insert, $blob_cols, $identity_col |
419 | ); |
420 | |
421 | $self->_identity($self->_writer_storage->_identity); |
422 | |
423 | $guard->commit; |
424 | |
425 | return $updated_cols; |
426 | } |
427 | |
428 | sub _insert { |
429 | my ($self, $next, $source, $to_insert, $blob_cols, $identity_col) = @_; |
430 | |
431 | my $updated_cols = $self->$next ($source, $to_insert); |
432 | |
433 | my $final_row = { |
434 | ($identity_col ? |
435 | ($identity_col => $self->last_insert_id($source, $identity_col)) : ()), |
436 | %$to_insert, |
437 | %$updated_cols, |
438 | }; |
439 | |
440 | $self->_insert_blobs ($source, $blob_cols, $final_row) if $blob_cols; |
441 | |
442 | return $updated_cols; |
443 | } |
444 | |
445 | sub update { |
446 | my $self = shift; |
447 | my ($source, $fields, $where, @rest) = @_; |
448 | |
fabbd5cc |
449 | # |
450 | # When *updating* identities, ASE requires SET IDENTITY_UPDATE called |
451 | # |
452 | if (my $blob_cols = $self->_remove_blob_cols($source, $fields)) { |
057db5ce |
453 | |
fabbd5cc |
454 | # If there are any blobs in $where, Sybase will return a descriptive error |
455 | # message. |
456 | # XXX blobs can still be used with a LIKE query, and this should be handled. |
057db5ce |
457 | |
fabbd5cc |
458 | # update+blob update(s) done atomically on separate connection |
459 | $self = $self->_writer_storage; |
057db5ce |
460 | |
fabbd5cc |
461 | my $guard = $self->txn_scope_guard; |
057db5ce |
462 | |
fabbd5cc |
463 | # First update the blob columns to be updated to '' (taken from $fields, where |
464 | # it is originally put by _remove_blob_cols .) |
465 | my %blobs_to_empty = map { ($_ => delete $fields->{$_}) } keys %$blob_cols; |
057db5ce |
466 | |
fabbd5cc |
467 | # We can't only update NULL blobs, because blobs cannot be in the WHERE clause. |
468 | $self->next::method($source, \%blobs_to_empty, $where, @rest); |
057db5ce |
469 | |
fabbd5cc |
470 | # Now update the blobs before the other columns in case the update of other |
471 | # columns makes the search condition invalid. |
472 | my $rv = $self->_update_blobs($source, $blob_cols, $where); |
057db5ce |
473 | |
fabbd5cc |
474 | if (keys %$fields) { |
057db5ce |
475 | |
fabbd5cc |
476 | # Now set the identity update flags for the actual update |
477 | local $self->{_autoinc_supplied_for_op} = (first |
478 | { $_->{is_auto_increment} } |
479 | values %{ $source->columns_info([ keys %$fields ]) } |
480 | ) ? 1 : 0; |
057db5ce |
481 | |
fabbd5cc |
482 | my $next = $self->next::can; |
483 | my $args = \@_; |
484 | return preserve_context { |
485 | $self->$next(@$args); |
486 | } after => sub { $guard->commit }; |
057db5ce |
487 | } |
488 | else { |
fabbd5cc |
489 | $guard->commit; |
490 | return $rv; |
057db5ce |
491 | } |
492 | } |
fabbd5cc |
493 | else { |
494 | # Set the identity update flags for the actual update |
495 | local $self->{_autoinc_supplied_for_op} = (first |
496 | { $_->{is_auto_increment} } |
497 | values %{ $source->columns_info([ keys %$fields ]) } |
498 | ) ? 1 : 0; |
499 | |
500 | return $self->next::method(@_); |
501 | } |
057db5ce |
502 | } |
503 | |
504 | sub insert_bulk { |
505 | my $self = shift; |
506 | my ($source, $cols, $data) = @_; |
507 | |
e366f807 |
508 | my $columns_info = $source->columns_info; |
509 | |
6298a324 |
510 | my $identity_col = |
e366f807 |
511 | first { $columns_info->{$_}{is_auto_increment} } |
512 | keys %$columns_info; |
057db5ce |
513 | |
fabbd5cc |
514 | # FIXME - this is duplication from DBI.pm. When refactored towards |
515 | # the LobWriter this can be folded back where it belongs. |
516 | local $self->{_autoinc_supplied_for_op} = |
517 | (first { $_ eq $identity_col } @$cols) |
518 | ? 1 |
519 | : 0 |
520 | ; |
057db5ce |
521 | |
057db5ce |
522 | my $use_bulk_api = |
523 | $self->_bulk_storage && |
524 | $self->_get_dbh->{syb_has_blk}; |
525 | |
6d5679b2 |
526 | if (! $use_bulk_api and ref($self->_dbi_connect_info->[0]) eq 'CODE') { |
527 | carp_unique( join ' ', |
528 | 'Bulk API support disabled due to use of a CODEREF connect_info.', |
529 | 'Reverting to regular array inserts.', |
530 | ); |
057db5ce |
531 | } |
532 | |
533 | if (not $use_bulk_api) { |
534 | my $blob_cols = $self->_remove_blob_cols_array($source, $cols, $data); |
535 | |
52cef7e3 |
536 | # next::method uses a txn anyway, but it ends too early in case we need to |
057db5ce |
537 | # select max(col) to get the identity for inserting blobs. |
538 | ($self, my $guard) = $self->{transaction_depth} == 0 ? |
539 | ($self->_writer_storage, $self->_writer_storage->txn_scope_guard) |
540 | : |
541 | ($self, undef); |
542 | |
057db5ce |
543 | $self->next::method(@_); |
544 | |
545 | if ($blob_cols) { |
fabbd5cc |
546 | if ($self->_autoinc_supplied_for_op) { |
057db5ce |
547 | $self->_insert_blobs_array ($source, $blob_cols, $cols, $data); |
548 | } |
549 | else { |
550 | my @cols_with_identities = (@$cols, $identity_col); |
551 | |
552 | ## calculate identities |
553 | # XXX This assumes identities always increase by 1, which may or may not |
554 | # be true. |
555 | my ($last_identity) = |
556 | $self->_dbh->selectrow_array ( |
557 | $self->_fetch_identity_sql($source, $identity_col) |
558 | ); |
559 | my @identities = (($last_identity - @$data + 1) .. $last_identity); |
560 | |
561 | my @data_with_identities = map [@$_, shift @identities], @$data; |
562 | |
563 | $self->_insert_blobs_array ( |
564 | $source, $blob_cols, \@cols_with_identities, \@data_with_identities |
565 | ); |
566 | } |
567 | } |
568 | |
569 | $guard->commit if $guard; |
570 | |
571 | return; |
572 | } |
573 | |
574 | # otherwise, use the bulk API |
575 | |
576 | # rearrange @$data so that columns are in database order |
6d5679b2 |
577 | # and so we submit a full column list |
578 | my %orig_order = map { $cols->[$_] => $_ } 0..$#$cols; |
057db5ce |
579 | |
6d5679b2 |
580 | my @source_columns = $source->columns; |
581 | |
582 | # bcp identity index is 1-based |
583 | my $identity_idx = first { $source_columns[$_] eq $identity_col } (0..$#source_columns); |
584 | $identity_idx = defined $identity_idx ? $identity_idx + 1 : 0; |
057db5ce |
585 | |
586 | my @new_data; |
6d5679b2 |
587 | for my $slice_idx (0..$#$data) { |
588 | push @new_data, [map { |
fabbd5cc |
589 | # identity data will be 'undef' if not _autoinc_supplied_for_op() |
6d5679b2 |
590 | # columns with defaults will also be 'undef' |
591 | exists $orig_order{$_} |
592 | ? $data->[$slice_idx][$orig_order{$_}] |
593 | : undef |
594 | } @source_columns]; |
057db5ce |
595 | } |
596 | |
6d5679b2 |
597 | my $proto_bind = $self->_resolve_bindattrs( |
598 | $source, |
599 | [map { |
600 | [ { dbic_colname => $source_columns[$_], _bind_data_slice_idx => $_ } |
601 | => $new_data[0][$_] ] |
602 | } (0 ..$#source_columns) ], |
603 | $columns_info |
604 | ); |
057db5ce |
605 | |
606 | ## Set a client-side conversion error handler, straight from DBD::Sybase docs. |
607 | # This ignores any data conversion errors detected by the client side libs, as |
608 | # they are usually harmless. |
609 | my $orig_cslib_cb = DBD::Sybase::set_cslib_cb( |
610 | Sub::Name::subname insert_bulk => sub { |
611 | my ($layer, $origin, $severity, $errno, $errmsg, $osmsg, $blkmsg) = @_; |
612 | |
613 | return 1 if $errno == 36; |
614 | |
615 | carp |
616 | "Layer: $layer, Origin: $origin, Severity: $severity, Error: $errno" . |
617 | ($errmsg ? "\n$errmsg" : '') . |
618 | ($osmsg ? "\n$osmsg" : '') . |
619 | ($blkmsg ? "\n$blkmsg" : ''); |
620 | |
621 | return 0; |
622 | }); |
623 | |
4edfce2f |
624 | my $exception = ''; |
ed7ab0f4 |
625 | try { |
057db5ce |
626 | my $bulk = $self->_bulk_storage; |
627 | |
628 | my $guard = $bulk->txn_scope_guard; |
629 | |
6d5679b2 |
630 | ## FIXME - once this is done - address the FIXME on finish() below |
057db5ce |
631 | ## XXX get this to work instead of our own $sth |
632 | ## will require SQLA or *Hacks changes for ordered columns |
633 | # $bulk->next::method($source, \@source_columns, \@new_data, { |
634 | # syb_bcp_attribs => { |
fabbd5cc |
635 | # identity_flag => $self->_autoinc_supplied_for_op ? 1 : 0, |
057db5ce |
636 | # identity_column => $identity_idx, |
637 | # } |
638 | # }); |
639 | my $sql = 'INSERT INTO ' . |
640 | $bulk->sql_maker->_quote($source->name) . ' (' . |
641 | # colname list is ignored for BCP, but does no harm |
642 | (join ', ', map $bulk->sql_maker->_quote($_), @source_columns) . ') '. |
643 | ' VALUES ('. (join ', ', ('?') x @source_columns) . ')'; |
644 | |
645 | ## XXX there's a bug in the DBD::Sybase bulk support that makes $sth->finish for |
646 | ## a prepare_cached statement ineffective. Replace with ->sth when fixed, or |
647 | ## better yet the version above. Should be fixed in DBD::Sybase . |
648 | my $sth = $bulk->_get_dbh->prepare($sql, |
649 | # 'insert', # op |
650 | { |
651 | syb_bcp_attribs => { |
fabbd5cc |
652 | identity_flag => $self->_autoinc_supplied_for_op ? 1 : 0, |
057db5ce |
653 | identity_column => $identity_idx, |
654 | } |
655 | } |
656 | ); |
657 | |
6d5679b2 |
658 | { |
659 | # FIXME the $sth->finish in _execute_array does a rollback for some |
660 | # reason. Disable it temporarily until we fix the SQLMaker thing above |
661 | no warnings 'redefine'; |
662 | no strict 'refs'; |
663 | local *{ref($sth).'::finish'} = sub {}; |
057db5ce |
664 | |
52cef7e3 |
665 | $self->_dbh_execute_for_fetch( |
6d5679b2 |
666 | $source, $sth, $proto_bind, \@source_columns, \@new_data |
667 | ); |
668 | } |
669 | |
670 | $guard->commit; |
057db5ce |
671 | |
672 | $bulk->_query_end($sql); |
ed7ab0f4 |
673 | } catch { |
674 | $exception = shift; |
057db5ce |
675 | }; |
676 | |
057db5ce |
677 | DBD::Sybase::set_cslib_cb($orig_cslib_cb); |
678 | |
679 | if ($exception =~ /-Y option/) { |
f32e99f9 |
680 | my $w = 'Sybase bulk API operation failed due to character set incompatibility, ' |
681 | . 'reverting to regular array inserts. Try unsetting the LANG environment variable' |
682 | ; |
683 | $w .= "\n$exception" if $self->debug; |
684 | carp $w; |
057db5ce |
685 | |
057db5ce |
686 | $self->_bulk_storage(undef); |
687 | unshift @_, $self; |
688 | goto \&insert_bulk; |
689 | } |
690 | elsif ($exception) { |
691 | # rollback makes the bulkLogin connection unusable |
692 | $self->_bulk_storage->disconnect; |
693 | $self->throw_exception($exception); |
694 | } |
695 | } |
696 | |
057db5ce |
697 | # Make sure blobs are not bound as placeholders, and return any non-empty ones |
698 | # as a hash. |
699 | sub _remove_blob_cols { |
700 | my ($self, $source, $fields) = @_; |
701 | |
702 | my %blob_cols; |
703 | |
704 | for my $col (keys %$fields) { |
705 | if ($self->_is_lob_column($source, $col)) { |
706 | my $blob_val = delete $fields->{$col}; |
707 | if (not defined $blob_val) { |
708 | $fields->{$col} = \'NULL'; |
709 | } |
710 | else { |
711 | $fields->{$col} = \"''"; |
712 | $blob_cols{$col} = $blob_val unless $blob_val eq ''; |
713 | } |
714 | } |
715 | } |
716 | |
717 | return %blob_cols ? \%blob_cols : undef; |
718 | } |
719 | |
720 | # same for insert_bulk |
721 | sub _remove_blob_cols_array { |
722 | my ($self, $source, $cols, $data) = @_; |
723 | |
724 | my @blob_cols; |
725 | |
726 | for my $i (0..$#$cols) { |
727 | my $col = $cols->[$i]; |
728 | |
729 | if ($self->_is_lob_column($source, $col)) { |
730 | for my $j (0..$#$data) { |
731 | my $blob_val = delete $data->[$j][$i]; |
732 | if (not defined $blob_val) { |
733 | $data->[$j][$i] = \'NULL'; |
734 | } |
735 | else { |
736 | $data->[$j][$i] = \"''"; |
737 | $blob_cols[$j][$i] = $blob_val |
738 | unless $blob_val eq ''; |
739 | } |
740 | } |
741 | } |
742 | } |
743 | |
744 | return @blob_cols ? \@blob_cols : undef; |
745 | } |
746 | |
747 | sub _update_blobs { |
748 | my ($self, $source, $blob_cols, $where) = @_; |
749 | |
9780718f |
750 | my @primary_cols = try |
56ad42bb |
751 | { $source->_pri_cols_or_die } |
9780718f |
752 | catch { |
753 | $self->throw_exception("Cannot update TEXT/IMAGE column(s): $_") |
754 | }; |
057db5ce |
755 | |
564986d6 |
756 | my @pks_to_update; |
757 | if ( |
758 | ref $where eq 'HASH' |
759 | and |
760 | @primary_cols == grep { defined $where->{$_} } @primary_cols |
761 | ) { |
057db5ce |
762 | my %row_to_update; |
763 | @row_to_update{@primary_cols} = @{$where}{@primary_cols}; |
564986d6 |
764 | @pks_to_update = \%row_to_update; |
765 | } |
766 | else { |
057db5ce |
767 | my $cursor = $self->select ($source, \@primary_cols, $where, {}); |
564986d6 |
768 | @pks_to_update = map { |
057db5ce |
769 | my %row; @row{@primary_cols} = @$_; \%row |
770 | } $cursor->all; |
771 | } |
772 | |
564986d6 |
773 | for my $ident (@pks_to_update) { |
774 | $self->_insert_blobs($source, $blob_cols, $ident); |
057db5ce |
775 | } |
776 | } |
777 | |
778 | sub _insert_blobs { |
779 | my ($self, $source, $blob_cols, $row) = @_; |
780 | my $dbh = $self->_get_dbh; |
781 | |
782 | my $table = $source->name; |
783 | |
784 | my %row = %$row; |
9780718f |
785 | my @primary_cols = try |
56ad42bb |
786 | { $source->_pri_cols_or_die } |
9780718f |
787 | catch { |
788 | $self->throw_exception("Cannot update TEXT/IMAGE column(s): $_") |
789 | }; |
057db5ce |
790 | |
791 | $self->throw_exception('Cannot update TEXT/IMAGE column(s) without primary key values') |
792 | if ((grep { defined $row{$_} } @primary_cols) != @primary_cols); |
793 | |
794 | for my $col (keys %$blob_cols) { |
795 | my $blob = $blob_cols->{$col}; |
796 | |
797 | my %where = map { ($_, $row{$_}) } @primary_cols; |
798 | |
799 | my $cursor = $self->select ($source, [$col], \%where, {}); |
800 | $cursor->next; |
801 | my $sth = $cursor->sth; |
802 | |
803 | if (not $sth) { |
057db5ce |
804 | $self->throw_exception( |
805 | "Could not find row in table '$table' for blob update:\n" |
6298a324 |
806 | . (Dumper \%where) |
057db5ce |
807 | ); |
808 | } |
809 | |
9780718f |
810 | try { |
057db5ce |
811 | do { |
812 | $sth->func('CS_GET', 1, 'ct_data_info') or die $sth->errstr; |
813 | } while $sth->fetch; |
814 | |
815 | $sth->func('ct_prepare_send') or die $sth->errstr; |
816 | |
817 | my $log_on_update = $self->_blob_log_on_update; |
818 | $log_on_update = 1 if not defined $log_on_update; |
819 | |
820 | $sth->func('CS_SET', 1, { |
821 | total_txtlen => length($blob), |
822 | log_on_update => $log_on_update |
823 | }, 'ct_data_info') or die $sth->errstr; |
824 | |
825 | $sth->func($blob, length($blob), 'ct_send_data') or die $sth->errstr; |
826 | |
827 | $sth->func('ct_finish_send') or die $sth->errstr; |
9780718f |
828 | } |
829 | catch { |
aca3b4c3 |
830 | if ($self->_using_freetds) { |
057db5ce |
831 | $self->throw_exception ( |
9780718f |
832 | "TEXT/IMAGE operation failed, probably because you are using FreeTDS: $_" |
057db5ce |
833 | ); |
9780718f |
834 | } |
835 | else { |
836 | $self->throw_exception($_); |
057db5ce |
837 | } |
838 | } |
9780718f |
839 | finally { |
840 | $sth->finish if $sth; |
841 | }; |
057db5ce |
842 | } |
843 | } |
844 | |
845 | sub _insert_blobs_array { |
846 | my ($self, $source, $blob_cols, $cols, $data) = @_; |
847 | |
848 | for my $i (0..$#$data) { |
849 | my $datum = $data->[$i]; |
850 | |
851 | my %row; |
852 | @row{ @$cols } = @$datum; |
853 | |
854 | my %blob_vals; |
855 | for my $j (0..$#$cols) { |
856 | if (exists $blob_cols->[$i][$j]) { |
857 | $blob_vals{ $cols->[$j] } = $blob_cols->[$i][$j]; |
858 | } |
859 | } |
860 | |
861 | $self->_insert_blobs ($source, \%blob_vals, \%row); |
862 | } |
863 | } |
864 | |
865 | =head2 connect_call_datetime_setup |
866 | |
867 | Used as: |
868 | |
869 | on_connect_call => 'datetime_setup' |
870 | |
8384a713 |
871 | In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set: |
057db5ce |
872 | |
873 | $dbh->syb_date_fmt('ISO_strict'); # output fmt: 2004-08-21T14:36:48.080Z |
874 | $dbh->do('set dateformat mdy'); # input fmt: 08/13/1979 18:08:55.080 |
875 | |
c1e5a9ac |
876 | This works for both C<DATETIME> and C<SMALLDATETIME> columns, note that |
057db5ce |
877 | C<SMALLDATETIME> columns only have minute precision. |
878 | |
879 | =cut |
880 | |
70c28808 |
881 | sub connect_call_datetime_setup { |
882 | my $self = shift; |
883 | my $dbh = $self->_get_dbh; |
057db5ce |
884 | |
70c28808 |
885 | if ($dbh->can('syb_date_fmt')) { |
886 | # amazingly, this works with FreeTDS |
887 | $dbh->syb_date_fmt('ISO_strict'); |
888 | } |
889 | else { |
890 | carp_once |
891 | 'Your DBD::Sybase is too old to support ' |
892 | .'DBIx::Class::InflateColumn::DateTime, please upgrade!'; |
057db5ce |
893 | |
c6b7885f |
894 | # FIXME - in retrospect this is a rather bad US-centric choice |
895 | # of format. Not changing as a bugwards compat, though in reality |
896 | # the only piece that sees the results of $dt object formatting |
897 | # (as opposed to parsing) is the database itself, so theoretically |
898 | # changing both this SET command and the formatter definition of |
899 | # ::S::D::Sybase::ASE::DateTime::Format below should be safe and |
900 | # transparent |
901 | |
057db5ce |
902 | $dbh->do('SET DATEFORMAT mdy'); |
057db5ce |
903 | } |
904 | } |
905 | |
057db5ce |
906 | |
90d7422f |
907 | sub _exec_txn_begin { |
057db5ce |
908 | my $self = shift; |
909 | |
910 | # bulkLogin=1 connections are always in a transaction, and can only call BEGIN |
911 | # TRAN once. However, we need to make sure there's a $dbh. |
912 | return if $self->_is_bulk_storage && $self->_dbh && $self->_began_bulk_work; |
913 | |
914 | $self->next::method(@_); |
915 | |
057db5ce |
916 | $self->_began_bulk_work(1) if $self->_is_bulk_storage; |
917 | } |
918 | |
057db5ce |
919 | # savepoint support using ASE syntax |
920 | |
90d7422f |
921 | sub _exec_svp_begin { |
057db5ce |
922 | my ($self, $name) = @_; |
923 | |
90d7422f |
924 | $self->_dbh->do("SAVE TRANSACTION $name"); |
057db5ce |
925 | } |
926 | |
927 | # A new SAVE TRANSACTION with the same name releases the previous one. |
90d7422f |
928 | sub _exec_svp_release { 1 } |
057db5ce |
929 | |
90d7422f |
930 | sub _exec_svp_rollback { |
057db5ce |
931 | my ($self, $name) = @_; |
932 | |
90d7422f |
933 | $self->_dbh->do("ROLLBACK TRANSACTION $name"); |
057db5ce |
934 | } |
935 | |
deabd575 |
936 | package # hide from PAUSE |
937 | DBIx::Class::Storage::DBI::Sybase::ASE::DateTime::Format; |
938 | |
939 | my $datetime_parse_format = '%Y-%m-%dT%H:%M:%S.%3NZ'; |
940 | my $datetime_format_format = '%m/%d/%Y %H:%M:%S.%3N'; |
941 | |
942 | my ($datetime_parser, $datetime_formatter); |
943 | |
944 | sub parse_datetime { |
945 | shift; |
946 | require DateTime::Format::Strptime; |
947 | $datetime_parser ||= DateTime::Format::Strptime->new( |
948 | pattern => $datetime_parse_format, |
949 | on_error => 'croak', |
950 | ); |
951 | return $datetime_parser->parse_datetime(shift); |
952 | } |
953 | |
954 | sub format_datetime { |
955 | shift; |
956 | require DateTime::Format::Strptime; |
957 | $datetime_formatter ||= DateTime::Format::Strptime->new( |
958 | pattern => $datetime_format_format, |
959 | on_error => 'croak', |
960 | ); |
961 | return $datetime_formatter->format_datetime(shift); |
962 | } |
963 | |
057db5ce |
964 | 1; |
965 | |
966 | =head1 Schema::Loader Support |
967 | |
290da7d6 |
968 | As of version C<0.05000>, L<DBIx::Class::Schema::Loader> should work well with |
c1e5a9ac |
969 | most versions of Sybase ASE. |
057db5ce |
970 | |
971 | =head1 FreeTDS |
972 | |
973 | This driver supports L<DBD::Sybase> compiled against FreeTDS |
974 | (L<http://www.freetds.org/>) to the best of our ability, however it is |
975 | recommended that you recompile L<DBD::Sybase> against the Sybase Open Client |
976 | libraries. They are a part of the Sybase ASE distribution: |
977 | |
978 | The Open Client FAQ is here: |
979 | L<http://www.isug.com/Sybase_FAQ/ASE/section7.html>. |
980 | |
981 | Sybase ASE for Linux (which comes with the Open Client libraries) may be |
982 | downloaded here: L<http://response.sybase.com/forms/ASE_Linux_Download>. |
983 | |
aca3b4c3 |
984 | To see if you're using FreeTDS run: |
057db5ce |
985 | |
986 | perl -MDBI -le 'my $dbh = DBI->connect($dsn, $user, $pass); print $dbh->{syb_oc_version}' |
987 | |
c1e5a9ac |
988 | It is recommended to set C<tds version> for your ASE server to C<5.0> in |
989 | C</etc/freetds/freetds.conf>. |
990 | |
991 | Some versions or configurations of the libraries involved will not support |
992 | placeholders, in which case the storage will be reblessed to |
057db5ce |
993 | L<DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars>. |
994 | |
995 | In some configurations, placeholders will work but will throw implicit type |
996 | conversion errors for anything that's not expecting a string. In such a case, |
997 | the C<auto_cast> option from L<DBIx::Class::Storage::DBI::AutoCast> is |
998 | automatically set, which you may enable on connection with |
c1e5a9ac |
999 | L<connect_call_set_auto_cast|DBIx::Class::Storage::DBI::AutoCast/connect_call_set_auto_cast>. |
1000 | The type info for the C<CAST>s is taken from the |
1001 | L<DBIx::Class::ResultSource/data_type> definitions in your Result classes, and |
1002 | are mapped to a Sybase type (if it isn't already) using a mapping based on |
1003 | L<SQL::Translator>. |
057db5ce |
1004 | |
48580715 |
1005 | In other configurations, placeholders will work just as they do with the Sybase |
057db5ce |
1006 | Open Client libraries. |
1007 | |
1008 | Inserts or updates of TEXT/IMAGE columns will B<NOT> work with FreeTDS. |
1009 | |
1010 | =head1 INSERTS WITH PLACEHOLDERS |
1011 | |
1012 | With placeholders enabled, inserts are done in a transaction so that there are |
1013 | no concurrency issues with getting the inserted identity value using |
1014 | C<SELECT MAX(col)>, which is the only way to get the C<IDENTITY> value in this |
1015 | mode. |
1016 | |
1017 | In addition, they are done on a separate connection so that it's possible to |
1018 | have active cursors when doing an insert. |
1019 | |
1020 | When using C<DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars> transactions |
c1e5a9ac |
1021 | are unnecessary and not used, as there are no concurrency issues with C<SELECT |
1022 | @@IDENTITY> which is a session variable. |
057db5ce |
1023 | |
1024 | =head1 TRANSACTIONS |
1025 | |
c1e5a9ac |
1026 | Due to limitations of the TDS protocol and L<DBD::Sybase>, you cannot begin a |
1027 | transaction while there are active cursors, nor can you use multiple active |
1028 | cursors within a transaction. An active cursor is, for example, a |
057db5ce |
1029 | L<ResultSet|DBIx::Class::ResultSet> that has been executed using C<next> or |
1030 | C<first> but has not been exhausted or L<reset|DBIx::Class::ResultSet/reset>. |
1031 | |
1032 | For example, this will not work: |
1033 | |
1034 | $schema->txn_do(sub { |
1035 | my $rs = $schema->resultset('Book'); |
47d7b769 |
1036 | while (my $result = $rs->next) { |
057db5ce |
1037 | $schema->resultset('MetaData')->create({ |
47d7b769 |
1038 | book_id => $result->id, |
057db5ce |
1039 | ... |
1040 | }); |
1041 | } |
1042 | }); |
1043 | |
1044 | This won't either: |
1045 | |
1046 | my $first_row = $large_rs->first; |
1047 | $schema->txn_do(sub { ... }); |
1048 | |
1049 | Transactions done for inserts in C<AutoCommit> mode when placeholders are in use |
1050 | are not affected, as they are done on an extra database handle. |
1051 | |
1052 | Some workarounds: |
1053 | |
1054 | =over 4 |
1055 | |
1056 | =item * use L<DBIx::Class::Storage::DBI::Replicated> |
1057 | |
1058 | =item * L<connect|DBIx::Class::Schema/connect> another L<Schema|DBIx::Class::Schema> |
1059 | |
1060 | =item * load the data from your cursor with L<DBIx::Class::ResultSet/all> |
1061 | |
1062 | =back |
1063 | |
1064 | =head1 MAXIMUM CONNECTIONS |
1065 | |
1066 | The TDS protocol makes separate connections to the server for active statements |
1067 | in the background. By default the number of such connections is limited to 25, |
1068 | on both the client side and the server side. |
1069 | |
1070 | This is a bit too low for a complex L<DBIx::Class> application, so on connection |
1071 | the client side setting is set to C<256> (see L<DBD::Sybase/maxConnect>.) You |
1072 | can override it to whatever setting you like in the DSN. |
1073 | |
1074 | See |
1075 | L<http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.help.ase_15.0.sag1/html/sag1/sag1272.htm> |
1076 | for information on changing the setting on the server side. |
1077 | |
1078 | =head1 DATES |
1079 | |
1080 | See L</connect_call_datetime_setup> to setup date formats |
1081 | for L<DBIx::Class::InflateColumn::DateTime>. |
1082 | |
9c510ba5 |
1083 | =head1 LIMITED QUERIES |
1084 | |
1085 | Because ASE does not have a good way to limit results in SQL that works for all |
1086 | types of queries, the limit dialect is set to |
1087 | L<GenericSubQ|SQL::Abstract::Limit/GenericSubQ>. |
1088 | |
1089 | Fortunately, ASE and L<DBD::Sybase> support cursors properly, so when |
1090 | L<GenericSubQ|SQL::Abstract::Limit/GenericSubQ> is too slow you can use |
1091 | the L<software_limit|DBIx::Class::ResultSet/software_limit> |
1092 | L<DBIx::Class::ResultSet> attribute to simulate limited queries by skipping over |
1093 | records. |
1094 | |
057db5ce |
1095 | =head1 TEXT/IMAGE COLUMNS |
1096 | |
1097 | L<DBD::Sybase> compiled with FreeTDS will B<NOT> allow you to insert or update |
1098 | C<TEXT/IMAGE> columns. |
1099 | |
1100 | Setting C<< $dbh->{LongReadLen} >> will also not work with FreeTDS use either: |
1101 | |
1102 | $schema->storage->dbh->do("SET TEXTSIZE $bytes"); |
1103 | |
1104 | or |
1105 | |
1106 | $schema->storage->set_textsize($bytes); |
1107 | |
1108 | instead. |
1109 | |
1110 | However, the C<LongReadLen> you pass in |
8384a713 |
1111 | L<connect_info|DBIx::Class::Storage::DBI/connect_info> is used to execute the |
1112 | equivalent C<SET TEXTSIZE> command on connection. |
057db5ce |
1113 | |
8384a713 |
1114 | See L</connect_call_blob_setup> for a |
1115 | L<connect_info|DBIx::Class::Storage::DBI/connect_info> setting you need to work |
1116 | with C<IMAGE> columns. |
057db5ce |
1117 | |
1118 | =head1 BULK API |
1119 | |
1120 | The experimental L<DBD::Sybase> Bulk API support is used for |
1121 | L<populate|DBIx::Class::ResultSet/populate> in B<void> context, in a transaction |
1122 | on a separate connection. |
1123 | |
1124 | To use this feature effectively, use a large number of rows for each |
1125 | L<populate|DBIx::Class::ResultSet/populate> call, eg.: |
1126 | |
1127 | while (my $rows = $data_source->get_100_rows()) { |
1128 | $rs->populate($rows); |
1129 | } |
1130 | |
1131 | B<NOTE:> the L<add_columns|DBIx::Class::ResultSource/add_columns> |
1132 | calls in your C<Result> classes B<must> list columns in database order for this |
1133 | to work. Also, you may have to unset the C<LANG> environment variable before |
c1e5a9ac |
1134 | loading your app, as C<BCP -Y> is not yet supported in DBD::Sybase . |
057db5ce |
1135 | |
1136 | When inserting IMAGE columns using this method, you'll need to use |
1137 | L</connect_call_blob_setup> as well. |
1138 | |
6476fd66 |
1139 | =head1 COMPUTED COLUMNS |
1140 | |
1141 | If you have columns such as: |
1142 | |
1143 | created_dtm AS getdate() |
1144 | |
1145 | represent them in your Result classes as: |
1146 | |
1147 | created_dtm => { |
1148 | data_type => undef, |
1149 | default_value => \'getdate()', |
1150 | is_nullable => 0, |
c1e5a9ac |
1151 | inflate_datetime => 1, |
6476fd66 |
1152 | } |
1153 | |
1154 | The C<data_type> must exist and must be C<undef>. Then empty inserts will work |
1155 | on tables with such columns. |
1156 | |
1157 | =head1 TIMESTAMP COLUMNS |
1158 | |
1159 | C<timestamp> columns in Sybase ASE are not really timestamps, see: |
1160 | L<http://dba.fyicenter.com/Interview-Questions/SYBASE/The_timestamp_datatype_in_Sybase_.html>. |
1161 | |
1162 | They should be defined in your Result classes as: |
1163 | |
1164 | ts => { |
1165 | data_type => 'timestamp', |
1166 | is_nullable => 0, |
1167 | inflate_datetime => 0, |
1168 | } |
1169 | |
1170 | The C<<inflate_datetime => 0>> is necessary if you use |
1171 | L<DBIx::Class::InflateColumn::DateTime>, and most people do, and still want to |
1172 | be able to read these values. |
1173 | |
1174 | The values will come back as hexadecimal. |
1175 | |
057db5ce |
1176 | =head1 TODO |
1177 | |
1178 | =over |
1179 | |
1180 | =item * |
1181 | |
1182 | Transitions to AutoCommit=0 (starting a transaction) mode by exhausting |
1183 | any active cursors, using eager cursors. |
1184 | |
1185 | =item * |
1186 | |
1187 | Real limits and limited counts using stored procedures deployed on startup. |
1188 | |
1189 | =item * |
1190 | |
057db5ce |
1191 | Blob update with a LIKE query on a blob, without invalidating the WHERE condition. |
1192 | |
1193 | =item * |
1194 | |
1195 | bulk_insert using prepare_cached (see comments.) |
1196 | |
1197 | =back |
1198 | |
1199 | =head1 AUTHOR |
1200 | |
8138f96a |
1201 | See L<DBIx::Class/AUTHOR> and L<DBIx::Class/CONTRIBUTORS>. |
057db5ce |
1202 | |
1203 | =head1 LICENSE |
1204 | |
1205 | You may distribute this code under the same terms as Perl itself. |
1206 | |
1207 | =cut |
1208 | # vim:sts=2 sw=2: |