Commit | Line | Data |
18360aed |
1 | package DBIx::Class::Storage::DBI::Oracle::Generic; |
2 | |
3 | use strict; |
4 | use warnings; |
5e782048 |
5 | use base qw/DBIx::Class::Storage::DBI/; |
6 | use mro 'c3'; |
7 | use DBIx::Class::Carp; |
b7b18f32 |
8 | use Scope::Guard (); |
6298a324 |
9 | use Context::Preserve 'preserve_context'; |
00a28188 |
10 | use List::Util 'first'; |
ddcc02d1 |
11 | use DBIx::Class::_Util qw( modver_gt_or_eq_and_lt dbic_internal_try ); |
fd323bf1 |
12 | use namespace::clean; |
18360aed |
13 | |
6a247f33 |
14 | __PACKAGE__->sql_limit_dialect ('RowNum'); |
2b8cc2f2 |
15 | __PACKAGE__->sql_quote_char ('"'); |
5e782048 |
16 | __PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker::Oracle'); |
17 | __PACKAGE__->datetime_parser_type('DateTime::Format::Oracle'); |
18 | |
19 | sub __cache_queries_with_max_lob_parts { 2 } |
6a247f33 |
20 | |
7137528d |
21 | =head1 NAME |
22 | |
7a84c41b |
23 | DBIx::Class::Storage::DBI::Oracle::Generic - Oracle Support for DBIx::Class |
7137528d |
24 | |
25 | =head1 SYNOPSIS |
26 | |
d88ecca6 |
27 | # In your result (table) classes |
28 | use base 'DBIx::Class::Core'; |
2e46b6eb |
29 | __PACKAGE__->add_columns({ id => { sequence => 'mysequence', auto_nextval => 1 } }); |
7137528d |
30 | __PACKAGE__->set_primary_key('id'); |
7137528d |
31 | |
c0024355 |
32 | # Somewhere in your Code |
33 | # add some data to a table with a hierarchical relationship |
34 | $schema->resultset('Person')->create ({ |
35 | firstname => 'foo', |
36 | lastname => 'bar', |
37 | children => [ |
38 | { |
39 | firstname => 'child1', |
40 | lastname => 'bar', |
41 | children => [ |
42 | { |
43 | firstname => 'grandchild', |
44 | lastname => 'bar', |
45 | } |
46 | ], |
47 | }, |
48 | { |
49 | firstname => 'child2', |
50 | lastname => 'bar', |
51 | }, |
52 | ], |
53 | }); |
54 | |
55 | # select from the hierarchical relationship |
56 | my $rs = $schema->resultset('Person')->search({}, |
57 | { |
58 | 'start_with' => { 'firstname' => 'foo', 'lastname' => 'bar' }, |
e6600283 |
59 | 'connect_by' => { 'parentid' => { '-prior' => { -ident => 'personid' } }, |
25ca709b |
60 | 'order_siblings_by' => { -asc => 'name' }, |
c0024355 |
61 | }; |
62 | ); |
63 | |
64 | # this will select the whole tree starting from person "foo bar", creating |
65 | # following query: |
66 | # SELECT |
67 | # me.persionid me.firstname, me.lastname, me.parentid |
68 | # FROM |
69 | # person me |
70 | # START WITH |
71 | # firstname = 'foo' and lastname = 'bar' |
72 | # CONNECT BY |
e6600283 |
73 | # parentid = prior personid |
c0024355 |
74 | # ORDER SIBLINGS BY |
75 | # firstname ASC |
76 | |
7137528d |
77 | =head1 DESCRIPTION |
78 | |
6c0230de |
79 | This class implements base Oracle support. The subclass |
80 | L<DBIx::Class::Storage::DBI::Oracle::WhereJoins> is for C<(+)> joins in Oracle |
86b23415 |
81 | versions before 9.0. |
7137528d |
82 | |
83 | =head1 METHODS |
84 | |
85 | =cut |
86 | |
bf51641f |
87 | sub _determine_supports_insert_returning { |
88 | my $self = shift; |
89 | |
90 | # TODO find out which version supports the RETURNING syntax |
91 | # 8i has it and earlier docs are a 404 on oracle.com |
92 | |
93 | return 1 |
94 | if $self->_server_info->{normalized_dbms_version} >= 8.001; |
95 | |
96 | return 0; |
97 | } |
98 | |
99 | __PACKAGE__->_use_insert_returning_bound (1); |
100 | |
dd2600c6 |
101 | sub deployment_statements { |
102 | my $self = shift;; |
103 | my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_; |
104 | |
105 | $sqltargs ||= {}; |
dd2600c6 |
106 | |
96736321 |
107 | if ( |
108 | ! exists $sqltargs->{producer_args}{oracle_version} |
109 | and |
110 | my $dver = $self->_server_info->{dbms_version} |
111 | ) { |
112 | $sqltargs->{producer_args}{oracle_version} = $dver; |
113 | } |
a4433d8e |
114 | |
38aead8e |
115 | $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest); |
dd2600c6 |
116 | } |
117 | |
18360aed |
118 | sub _dbh_last_insert_id { |
2e46b6eb |
119 | my ($self, $dbh, $source, @columns) = @_; |
120 | my @ids = (); |
121 | foreach my $col (@columns) { |
122 | my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col)); |
07cda1c5 |
123 | my $id = $self->_sequence_fetch( 'CURRVAL', $seq ); |
2e46b6eb |
124 | push @ids, $id; |
125 | } |
126 | return @ids; |
18360aed |
127 | } |
128 | |
129 | sub _dbh_get_autoinc_seq { |
130 | my ($self, $dbh, $source, $col) = @_; |
131 | |
032b2366 |
132 | my $sql_maker = $self->sql_maker; |
07cda1c5 |
133 | my ($ql, $qr) = map { $_ ? (quotemeta $_) : '' } $sql_maker->_quote_chars; |
cb464582 |
134 | |
e6dd7b42 |
135 | my $source_name; |
032b2366 |
136 | if ( ref $source->name eq 'SCALAR' ) { |
137 | $source_name = ${$source->name}; |
07cda1c5 |
138 | |
139 | # the ALL_TRIGGERS match further on is case sensitive - thus uppercase |
140 | # stuff unless it is already quoted |
141 | $source_name = uc ($source_name) if $source_name !~ /\"/; |
e6dd7b42 |
142 | } |
143 | else { |
032b2366 |
144 | $source_name = $source->name; |
07cda1c5 |
145 | $source_name = uc($source_name) unless $ql; |
e6dd7b42 |
146 | } |
38aead8e |
147 | |
032b2366 |
148 | # trigger_body is a LONG |
149 | local $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024); |
150 | |
151 | # disable default bindtype |
152 | local $sql_maker->{bindtype} = 'normal'; |
153 | |
154 | # look up the correct sequence automatically |
07cda1c5 |
155 | my ( $schema, $table ) = $source_name =~ /( (?:${ql})? \w+ (?:${qr})? ) \. ( (?:${ql})? \w+ (?:${qr})? )/x; |
a6646e1b |
156 | |
157 | # if no explicit schema was requested - use the default schema (which in the case of Oracle is the db user) |
fcb52f08 |
158 | $schema ||= \'= USER'; |
a6646e1b |
159 | |
032b2366 |
160 | my ($sql, @bind) = $sql_maker->select ( |
161 | 'ALL_TRIGGERS', |
07cda1c5 |
162 | [qw/TRIGGER_BODY TABLE_OWNER TRIGGER_NAME/], |
032b2366 |
163 | { |
630eee41 |
164 | OWNER => $schema, |
07cda1c5 |
165 | TABLE_NAME => $table || $source_name, |
166 | TRIGGERING_EVENT => { -like => '%INSERT%' }, # this will also catch insert_or_update |
167 | TRIGGER_TYPE => { -like => '%BEFORE%' }, # we care only about 'before' triggers |
168 | STATUS => 'ENABLED', |
032b2366 |
169 | }, |
170 | ); |
e6dd7b42 |
171 | |
6f5f880d |
172 | # to find all the triggers that mention the column in question a simple |
173 | # regex grep since the trigger_body above is a LONG and hence not searchable |
630eee41 |
174 | # via -like |
6f5f880d |
175 | my @triggers = ( map |
176 | { my %inf; @inf{qw/body schema name/} = @$_; \%inf } |
177 | ( grep |
07cda1c5 |
178 | { $_->[0] =~ /\:new\.${ql}${col}${qr} | \:new\.$col/xi } |
6f5f880d |
179 | @{ $dbh->selectall_arrayref( $sql, {}, @bind ) } |
180 | ) |
181 | ); |
182 | |
630eee41 |
183 | # extract all sequence names mentioned in each trigger, throw away |
184 | # triggers without apparent sequences |
185 | @triggers = map { |
186 | my @seqs = $_->{body} =~ / ( [\.\w\"\-]+ ) \. nextval /xig; |
187 | @seqs |
188 | ? { %$_, sequences => \@seqs } |
189 | : () |
190 | ; |
191 | } @triggers; |
6f5f880d |
192 | |
193 | my $chosen_trigger; |
194 | |
195 | # if only one trigger matched things are easy |
196 | if (@triggers == 1) { |
197 | |
198 | if ( @{$triggers[0]{sequences}} == 1 ) { |
199 | $chosen_trigger = $triggers[0]; |
200 | } |
201 | else { |
202 | $self->throw_exception( sprintf ( |
e705f529 |
203 | "Unable to introspect trigger '%s' for column '%s.%s' (references multiple sequences). " |
6f5f880d |
204 | . "You need to specify the correct 'sequence' explicitly in '%s's column_info.", |
205 | $triggers[0]{name}, |
206 | $source_name, |
207 | $col, |
208 | $col, |
209 | ) ); |
210 | } |
211 | } |
212 | # got more than one matching trigger - see if we can narrow it down |
213 | elsif (@triggers > 1) { |
df6e3f5c |
214 | |
6f5f880d |
215 | my @candidates = grep |
216 | { $_->{body} =~ / into \s+ \:new\.$col /xi } |
217 | @triggers |
218 | ; |
df6e3f5c |
219 | |
6f5f880d |
220 | if (@candidates == 1 && @{$candidates[0]{sequences}} == 1) { |
221 | $chosen_trigger = $candidates[0]; |
df6e3f5c |
222 | } |
6f5f880d |
223 | else { |
224 | $self->throw_exception( sprintf ( |
e705f529 |
225 | "Unable to reliably select a BEFORE INSERT trigger for column '%s.%s' (possibilities: %s). " |
6f5f880d |
226 | . "You need to specify the correct 'sequence' explicitly in '%s's column_info.", |
227 | $source_name, |
228 | $col, |
229 | ( join ', ', map { "'$_->{name}'" } @triggers ), |
230 | $col, |
231 | ) ); |
232 | } |
233 | } |
234 | |
235 | if ($chosen_trigger) { |
236 | my $seq_name = $chosen_trigger->{sequences}[0]; |
237 | |
238 | $seq_name = "$chosen_trigger->{schema}.$seq_name" |
239 | unless $seq_name =~ /\./; |
df6e3f5c |
240 | |
07cda1c5 |
241 | return \$seq_name if $seq_name =~ /\"/; # may already be quoted in-trigger |
df6e3f5c |
242 | return $seq_name; |
18360aed |
243 | } |
6f5f880d |
244 | |
245 | $self->throw_exception( sprintf ( |
e705f529 |
246 | "No suitable BEFORE INSERT triggers found for column '%s.%s'. " |
6f5f880d |
247 | . "You need to specify the correct 'sequence' explicitly in '%s's column_info.", |
248 | $source_name, |
249 | $col, |
250 | $col, |
251 | )); |
18360aed |
252 | } |
253 | |
2e46b6eb |
254 | sub _sequence_fetch { |
255 | my ( $self, $type, $seq ) = @_; |
07cda1c5 |
256 | |
257 | # use the maker to leverage quoting settings |
e6f3272b |
258 | my $sth = $self->_dbh->prepare_cached( |
259 | $self->sql_maker->select('DUAL', [ ref $seq ? \"$$seq.$type" : "$seq.$type" ] ) |
260 | ); |
261 | $sth->execute; |
262 | my ($id) = $sth->fetchrow_array; |
263 | $sth->finish; |
2e46b6eb |
264 | return $id; |
265 | } |
266 | |
6dc4be0f |
267 | sub _ping { |
c2481821 |
268 | my $self = shift; |
7ba7a57d |
269 | |
6dc4be0f |
270 | my $dbh = $self->_dbh or return 0; |
7ba7a57d |
271 | |
6dc4be0f |
272 | local $dbh->{RaiseError} = 1; |
ecdf1ac8 |
273 | local $dbh->{PrintError} = 0; |
c2d7baef |
274 | |
ddcc02d1 |
275 | ( dbic_internal_try { |
ecdf1ac8 |
276 | $dbh->do('select 1 from dual'); |
52b420dd |
277 | 1; |
ddcc02d1 |
278 | }) |
279 | ? 1 |
280 | : 0 |
281 | ; |
c2481821 |
282 | } |
283 | |
d789fa99 |
284 | sub _dbh_execute { |
9930caaf |
285 | #my ($self, $dbh, $sql, $bind, $bind_attrs) = @_; |
7d534e68 |
286 | my ($self, $sql, $bind) = @_[0,2,3]; |
a6ae092b |
287 | |
4b8a53ea |
288 | # Turn off sth caching for multi-part LOBs. See _prep_for_execute below |
a6ae092b |
289 | local $self->{disable_sth_caching} = 1 if first { |
290 | ($_->[0]{_ora_lob_autosplit_part}||0) |
291 | > |
292 | (__cache_queries_with_max_lob_parts - 1) |
293 | } @$bind; |
d789fa99 |
294 | |
4f661051 |
295 | my $next = $self->next::can; |
87560ef9 |
296 | |
a6ae092b |
297 | # if we are already in a txn we can't retry anything |
298 | return shift->$next(@_) |
299 | if $self->transaction_depth; |
300 | |
7d534e68 |
301 | # cheat the blockrunner we are just about to create |
302 | # we do want to rerun things regardless of outer state |
a6ae092b |
303 | local $self->{_in_do_block}; |
304 | |
305 | return DBIx::Class::Storage::BlockRunner->new( |
306 | storage => $self, |
a6ae092b |
307 | wrap_txn => 0, |
308 | retry_handler => sub { |
309 | # ORA-01003: no statement parsed (someone changed the table somehow, |
310 | # invalidating your cursor.) |
7d534e68 |
311 | if ( |
312 | $_[0]->failed_attempt_count == 1 |
313 | and |
314 | $_[0]->last_exception =~ /ORA-01003/ |
315 | and |
316 | my $dbh = $_[0]->storage->_dbh |
317 | ) { |
318 | delete $dbh->{CachedKids}{$sql}; |
319 | return 1; |
320 | } |
321 | else { |
322 | return 0; |
52b420dd |
323 | } |
a6ae092b |
324 | }, |
7d534e68 |
325 | )->run( $next, @_ ); |
d789fa99 |
326 | } |
327 | |
52cef7e3 |
328 | sub _dbh_execute_for_fetch { |
a5a27e7a |
329 | #my ($self, $sth, $tuple_status, @extra) = @_; |
330 | |
52cef7e3 |
331 | # DBD::Oracle warns loudly on partial execute_for_fetch failures |
a5a27e7a |
332 | local $_[1]->{PrintWarn} = 0; |
333 | |
334 | shift->next::method(@_); |
335 | } |
336 | |
7137528d |
337 | =head2 get_autoinc_seq |
338 | |
339 | Returns the sequence name for an autoincrement column |
340 | |
341 | =cut |
342 | |
18360aed |
343 | sub get_autoinc_seq { |
344 | my ($self, $source, $col) = @_; |
d4daee7b |
345 | |
373940e1 |
346 | $self->dbh_do('_dbh_get_autoinc_seq', $source, $col); |
18360aed |
347 | } |
348 | |
8f7e044c |
349 | =head2 datetime_parser_type |
350 | |
351 | This sets the proper DateTime::Format module for use with |
352 | L<DBIx::Class::InflateColumn::DateTime>. |
353 | |
9900b569 |
354 | =head2 connect_call_datetime_setup |
d2a3958e |
355 | |
356 | Used as: |
357 | |
9900b569 |
358 | on_connect_call => 'datetime_setup' |
d2a3958e |
359 | |
8384a713 |
360 | In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set the session nls |
361 | date, and timestamp values for use with L<DBIx::Class::InflateColumn::DateTime> |
362 | and the necessary environment variables for L<DateTime::Format::Oracle>, which |
363 | is used by it. |
d2a3958e |
364 | |
82f6f45f |
365 | Maximum allowable precision is used, unless the environment variables have |
366 | already been set. |
d2a3958e |
367 | |
9900b569 |
368 | These are the defaults used: |
369 | |
370 | $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; |
371 | $ENV{NLS_TIMESTAMP_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF'; |
372 | $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; |
373 | |
d9e53b85 |
374 | To get more than second precision with L<DBIx::Class::InflateColumn::DateTime> |
375 | for your timestamps, use something like this: |
376 | |
377 | use Time::HiRes 'time'; |
378 | my $ts = DateTime->from_epoch(epoch => time); |
379 | |
d2a3958e |
380 | =cut |
381 | |
9900b569 |
382 | sub connect_call_datetime_setup { |
d2a3958e |
383 | my $self = shift; |
d2a3958e |
384 | |
385 | my $date_format = $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; |
386 | my $timestamp_format = $ENV{NLS_TIMESTAMP_FORMAT} ||= |
387 | 'YYYY-MM-DD HH24:MI:SS.FF'; |
388 | my $timestamp_tz_format = $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= |
389 | 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; |
390 | |
7a84c41b |
391 | $self->_do_query( |
d7a58a29 |
392 | "alter session set nls_date_format = '$date_format'" |
393 | ); |
7a84c41b |
394 | $self->_do_query( |
d7a58a29 |
395 | "alter session set nls_timestamp_format = '$timestamp_format'" |
396 | ); |
7a84c41b |
397 | $self->_do_query( |
d7a58a29 |
398 | "alter session set nls_timestamp_tz_format='$timestamp_tz_format'" |
399 | ); |
d2a3958e |
400 | } |
401 | |
0e773352 |
402 | ### Note originally by Ron "Quinn" Straight <quinnfazigu@gmail.org> |
403 | ### http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=dbsrgits/DBIx-Class.git;a=commitdiff;h=5db2758de644d53e07cd3e05f0e9037bf40116fc |
404 | # |
405 | # Handle LOB types in Oracle. Under a certain size (4k?), you can get away |
406 | # with the driver assuming your input is the deprecated LONG type if you |
407 | # encode it as a hex string. That ain't gonna fly at larger values, where |
408 | # you'll discover you have to do what this does. |
409 | # |
410 | # This method had to be overridden because we need to set ora_field to the |
411 | # actual column, and that isn't passed to the call (provided by Storage) to |
412 | # bind_attribute_by_data_type. |
413 | # |
414 | # According to L<DBD::Oracle>, the ora_field isn't always necessary, but |
415 | # adding it doesn't hurt, and will save your bacon if you're modifying a |
416 | # table with more than one LOB column. |
417 | # |
418 | sub _dbi_attrs_for_bind { |
419 | my ($self, $ident, $bind) = @_; |
00a28188 |
420 | |
0e773352 |
421 | my $attrs = $self->next::method($ident, $bind); |
422 | |
74113bd1 |
423 | # Push the column name into all bind attrs, make sure to *NOT* write into |
424 | # the existing $attrs->[$idx]{..} hashref, as it is cached by the call to |
425 | # next::method above. |
e7b6c2a4 |
426 | # FIXME - this code will go away when the LobWriter refactor lands |
74113bd1 |
427 | $attrs->[$_] |
428 | and |
429 | keys %{ $attrs->[$_] } |
430 | and |
431 | $bind->[$_][0]{dbic_colname} |
432 | and |
433 | $attrs->[$_] = { %{$attrs->[$_]}, ora_field => $bind->[$_][0]{dbic_colname} } |
434 | for 0 .. $#$attrs; |
5db2758d |
435 | |
0e773352 |
436 | $attrs; |
437 | } |
5db2758d |
438 | |
0e773352 |
439 | sub bind_attribute_by_data_type { |
440 | my ($self, $dt) = @_; |
441 | |
8892d8e5 |
442 | if ($self->_is_lob_type($dt)) { |
443 | |
7302b3e0 |
444 | # no earlier - no later |
445 | $self->throw_exception( |
446 | "BLOB/CLOB support in DBD::Oracle == 1.23 is broken, use an earlier or later " |
447 | . "version (https://rt.cpan.org/Public/Bug/Display.html?id=46016)" |
448 | ) if modver_gt_or_eq_and_lt( 'DBD::Oracle', '1.23', '1.24' ); |
5db2758d |
449 | |
0e773352 |
450 | return { |
451 | ora_type => $self->_is_text_lob_type($dt) |
d7a58a29 |
452 | ? DBD::Oracle::ORA_CLOB() |
453 | : DBD::Oracle::ORA_BLOB() |
0e773352 |
454 | }; |
d7a58a29 |
455 | } |
8892d8e5 |
456 | else { |
457 | return undef; |
458 | } |
5db2758d |
459 | } |
460 | |
00a28188 |
461 | # Handle blob columns in WHERE. |
462 | # |
463 | # For equality comparisons: |
464 | # |
465 | # We split data intended for comparing to a LOB into 2000 character chunks and |
466 | # compare them using dbms_lob.substr on the LOB column. |
467 | # |
468 | # We turn off DBD::Oracle LOB binds for these partial LOB comparisons by passing |
469 | # dbd_attrs => undef, because these are regular varchar2 comparisons and |
470 | # otherwise the query will fail. |
471 | # |
472 | # Since the most common comparison size is likely to be under 4000 characters |
473 | # (TEXT comparisons previously deployed to other RDBMSes) we disable |
474 | # prepare_cached for queries with more than two part comparisons to a LOB |
475 | # column. This is done in _dbh_execute (above) which was previously overridden |
476 | # to gracefully recover from an Oracle error. This is to be careful to not |
477 | # exhaust your application's open cursor limit. |
478 | # |
479 | # See: |
480 | # http://itcareershift.com/blog1/2011/02/21/oracle-max-number-of-open-cursors-complete-reference-for-the-new-oracle-dba/ |
481 | # on the open_cursor limit. |
482 | # |
483 | # For everything else: |
484 | # |
485 | # We assume that everything that is not a LOB comparison, will most likely be a |
486 | # LIKE query or some sort of function invocation. This may prove to be a naive |
487 | # assumption in the future, but for now it should cover the two most likely |
488 | # things users would want to do with a BLOB or CLOB, an equality test or a LIKE |
489 | # query (on a CLOB.) |
490 | # |
491 | # For these expressions, the bind must NOT have the attributes of a LOB bind for |
492 | # DBD::Oracle, otherwise the query will fail. This is done by passing |
493 | # dbd_attrs => undef. |
494 | |
495 | sub _prep_for_execute { |
496 | my $self = shift; |
497 | my ($op) = @_; |
498 | |
00819de0 |
499 | return $self->next::method(@_) |
500 | if $op eq 'insert'; |
00a28188 |
501 | |
00819de0 |
502 | my ($sql, $bind) = $self->next::method(@_); |
00a28188 |
503 | |
00819de0 |
504 | my $lob_bind_indices = { map { |
505 | ( |
5e782048 |
506 | $bind->[$_][0]{sqlt_datatype} |
00819de0 |
507 | and |
508 | $self->_is_lob_type($bind->[$_][0]{sqlt_datatype}) |
509 | ) ? ( $_ => 1 ) : () |
510 | } ( 0 .. $#$bind ) }; |
00a28188 |
511 | |
00819de0 |
512 | return ($sql, $bind) unless %$lob_bind_indices; |
00a28188 |
513 | |
00819de0 |
514 | my ($final_sql, @final_binds); |
515 | if ($op eq 'update') { |
e705f529 |
516 | $self->throw_exception('Update with complex WHERE clauses involving BLOB columns currently not supported') |
5e782048 |
517 | if $sql =~ /\bWHERE\b .+ \bWHERE\b/xs; |
518 | |
e12571af |
519 | my $where_sql; |
520 | ($final_sql, $where_sql) = $sql =~ /^ (.+?) ( \bWHERE\b .+) /xs; |
00819de0 |
521 | |
522 | if (my $set_bind_count = $final_sql =~ y/?//) { |
5e782048 |
523 | |
00819de0 |
524 | delete $lob_bind_indices->{$_} for (0 .. ($set_bind_count - 1)); |
5e782048 |
525 | |
00819de0 |
526 | # bail if only the update part contains blobs |
527 | return ($sql, $bind) unless %$lob_bind_indices; |
528 | |
529 | @final_binds = splice @$bind, 0, $set_bind_count; |
530 | $lob_bind_indices = { map |
531 | { $_ - $set_bind_count => $lob_bind_indices->{$_} } |
532 | keys %$lob_bind_indices |
533 | }; |
534 | } |
e12571af |
535 | |
536 | # if we got that far - assume the where SQL is all we got |
537 | # (the first part is already shoved into $final_sql) |
538 | $sql = $where_sql; |
5e782048 |
539 | } |
00819de0 |
540 | elsif ($op ne 'select' and $op ne 'delete') { |
5e782048 |
541 | $self->throw_exception("Unsupported \$op: $op"); |
542 | } |
543 | |
00819de0 |
544 | my @sql_parts = split /\?/, $sql; |
545 | |
5e782048 |
546 | my $col_equality_re = qr/ (?<=\s) ([\w."]+) (\s*=\s*) $/x; |
547 | |
548 | for my $b_idx (0 .. $#$bind) { |
549 | my $bound = $bind->[$b_idx]; |
550 | |
00819de0 |
551 | if ( |
552 | $lob_bind_indices->{$b_idx} |
553 | and |
554 | my ($col, $eq) = $sql_parts[0] =~ $col_equality_re |
555 | ) { |
556 | my $data = $bound->[1]; |
00a28188 |
557 | |
00819de0 |
558 | $data = "$data" if ref $data; |
00a28188 |
559 | |
00819de0 |
560 | my @parts = unpack '(a2000)*', $data; |
00a28188 |
561 | |
00819de0 |
562 | my @sql_frag; |
00a28188 |
563 | |
00819de0 |
564 | for my $idx (0..$#parts) { |
565 | push @sql_frag, sprintf ( |
566 | 'UTL_RAW.CAST_TO_VARCHAR2(RAWTOHEX(DBMS_LOB.SUBSTR(%s, 2000, %d))) = ?', |
567 | $col, ($idx*2000 + 1), |
568 | ); |
569 | } |
00a28188 |
570 | |
00819de0 |
571 | my $sql_frag = '( ' . (join ' AND ', @sql_frag) . ' )'; |
00a28188 |
572 | |
00819de0 |
573 | $sql_parts[0] =~ s/$col_equality_re/$sql_frag/; |
00a28188 |
574 | |
00819de0 |
575 | $final_sql .= shift @sql_parts; |
00a28188 |
576 | |
00819de0 |
577 | for my $idx (0..$#parts) { |
578 | push @final_binds, [ |
00a28188 |
579 | { |
580 | %{ $bound->[0] }, |
00819de0 |
581 | _ora_lob_autosplit_part => $idx, |
00a28188 |
582 | dbd_attrs => undef, |
583 | }, |
00819de0 |
584 | $parts[$idx] |
00a28188 |
585 | ]; |
586 | } |
587 | } |
588 | else { |
00819de0 |
589 | $final_sql .= shift(@sql_parts) . '?'; |
590 | push @final_binds, $lob_bind_indices->{$b_idx} |
591 | ? [ |
592 | { |
593 | %{ $bound->[0] }, |
594 | dbd_attrs => undef, |
595 | }, |
596 | $bound->[1], |
597 | ] : $bound |
598 | ; |
00a28188 |
599 | } |
600 | } |
5e782048 |
601 | |
602 | if (@sql_parts > 1) { |
603 | carp "There are more placeholders than binds, this should not happen!"; |
604 | @sql_parts = join ('?', @sql_parts); |
605 | } |
606 | |
00819de0 |
607 | $final_sql .= $sql_parts[0]; |
00a28188 |
608 | |
00819de0 |
609 | return ($final_sql, \@final_binds); |
00a28188 |
610 | } |
611 | |
612 | # Savepoints stuff. |
613 | |
90d7422f |
614 | sub _exec_svp_begin { |
d7a58a29 |
615 | my ($self, $name) = @_; |
90d7422f |
616 | $self->_dbh->do("SAVEPOINT $name"); |
1816be4f |
617 | } |
618 | |
281719d2 |
619 | # Oracle automatically releases a savepoint when you start another one with the |
620 | # same name. |
90d7422f |
621 | sub _exec_svp_release { 1 } |
281719d2 |
622 | |
90d7422f |
623 | sub _exec_svp_rollback { |
d7a58a29 |
624 | my ($self, $name) = @_; |
90d7422f |
625 | $self->_dbh->do("ROLLBACK TO SAVEPOINT $name") |
281719d2 |
626 | } |
627 | |
6c0230de |
628 | =head2 relname_to_table_alias |
629 | |
630 | L<DBIx::Class> uses L<DBIx::Class::Relationship> names as table aliases in |
631 | queries. |
632 | |
633 | Unfortunately, Oracle doesn't support identifiers over 30 chars in length, so |
af0edca1 |
634 | the L<DBIx::Class::Relationship> name is shortened and appended with half of an |
635 | MD5 hash. |
6c0230de |
636 | |
5529838f |
637 | See L<DBIx::Class::Storage::DBI/relname_to_table_alias>. |
6c0230de |
638 | |
639 | =cut |
640 | |
641 | sub relname_to_table_alias { |
642 | my $self = shift; |
643 | my ($relname, $join_count) = @_; |
644 | |
645 | my $alias = $self->next::method(@_); |
646 | |
19c4cc62 |
647 | # we need to shorten here in addition to the shortening in SQLA itself, |
d07f715d |
648 | # since the final relnames are crucial for the join optimizer |
19c4cc62 |
649 | return $self->sql_maker->_shorten_identifier($alias); |
6c0230de |
650 | } |
651 | |
6c0bb6a7 |
652 | =head2 with_deferred_fk_checks |
653 | |
654 | Runs a coderef between: |
655 | |
656 | alter session set constraints = deferred |
657 | ... |
658 | alter session set constraints = immediate |
659 | |
b7b18f32 |
660 | to defer foreign key checks. |
661 | |
662 | Constraints must be declared C<DEFERRABLE> for this to work. |
6c0bb6a7 |
663 | |
664 | =cut |
665 | |
666 | sub with_deferred_fk_checks { |
667 | my ($self, $sub) = @_; |
b7b18f32 |
668 | |
669 | my $txn_scope_guard = $self->txn_scope_guard; |
670 | |
6c0bb6a7 |
671 | $self->_do_query('alter session set constraints = deferred'); |
54161a15 |
672 | |
b7b18f32 |
673 | my $sg = Scope::Guard->new(sub { |
674 | $self->_do_query('alter session set constraints = immediate'); |
675 | }); |
281719d2 |
676 | |
6298a324 |
677 | return |
678 | preserve_context { $sub->() } after => sub { $txn_scope_guard->commit }; |
281719d2 |
679 | } |
680 | |
c0024355 |
681 | =head1 ATTRIBUTES |
682 | |
683 | Following additional attributes can be used in resultsets. |
684 | |
6b2fbbf0 |
685 | =head2 connect_by or connect_by_nocycle |
c0024355 |
686 | |
687 | =over 4 |
688 | |
689 | =item Value: \%connect_by |
690 | |
691 | =back |
692 | |
693 | A hashref of conditions used to specify the relationship between parent rows |
694 | and child rows of the hierarchy. |
695 | |
6b2fbbf0 |
696 | |
c0024355 |
697 | connect_by => { parentid => 'prior personid' } |
698 | |
699 | # adds a connect by statement to the query: |
700 | # SELECT |
701 | # me.persionid me.firstname, me.lastname, me.parentid |
702 | # FROM |
703 | # person me |
704 | # CONNECT BY |
705 | # parentid = prior persionid |
8273e845 |
706 | |
c0024355 |
707 | |
6b2fbbf0 |
708 | connect_by_nocycle => { parentid => 'prior personid' } |
2ba03b16 |
709 | |
6b2fbbf0 |
710 | # adds a connect by statement to the query: |
711 | # SELECT |
712 | # me.persionid me.firstname, me.lastname, me.parentid |
713 | # FROM |
714 | # person me |
715 | # CONNECT BY NOCYCLE |
716 | # parentid = prior persionid |
2ba03b16 |
717 | |
718 | |
c0024355 |
719 | =head2 start_with |
720 | |
721 | =over 4 |
722 | |
723 | =item Value: \%condition |
724 | |
725 | =back |
726 | |
727 | A hashref of conditions which specify the root row(s) of the hierarchy. |
728 | |
729 | It uses the same syntax as L<DBIx::Class::ResultSet/search> |
730 | |
731 | start_with => { firstname => 'Foo', lastname => 'Bar' } |
732 | |
733 | # SELECT |
734 | # me.persionid me.firstname, me.lastname, me.parentid |
735 | # FROM |
736 | # person me |
737 | # START WITH |
738 | # firstname = 'foo' and lastname = 'bar' |
739 | # CONNECT BY |
740 | # parentid = prior persionid |
741 | |
742 | =head2 order_siblings_by |
743 | |
744 | =over 4 |
745 | |
746 | =item Value: ($order_siblings_by | \@order_siblings_by) |
747 | |
748 | =back |
749 | |
750 | Which column(s) to order the siblings by. |
751 | |
752 | It uses the same syntax as L<DBIx::Class::ResultSet/order_by> |
753 | |
754 | 'order_siblings_by' => 'firstname ASC' |
755 | |
756 | # SELECT |
757 | # me.persionid me.firstname, me.lastname, me.parentid |
758 | # FROM |
759 | # person me |
760 | # CONNECT BY |
761 | # parentid = prior persionid |
762 | # ORDER SIBLINGS BY |
763 | # firstname ASC |
764 | |
a2bd3796 |
765 | =head1 FURTHER QUESTIONS? |
18360aed |
766 | |
a2bd3796 |
767 | Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>. |
18360aed |
768 | |
a2bd3796 |
769 | =head1 COPYRIGHT AND LICENSE |
18360aed |
770 | |
a2bd3796 |
771 | This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE> |
772 | by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can |
773 | redistribute it and/or modify it under the same terms as the |
774 | L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>. |
18360aed |
775 | |
776 | =cut |
7137528d |
777 | |
778 | 1; |
00a28188 |
779 | # vim:sts=2 sw=2: |