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'; |
7b731f1e |
10 | use DBIx::Class::_Util qw( modver_gt_or_eq modver_gt_or_eq_and_lt dbic_internal_try ); |
fd323bf1 |
11 | use namespace::clean; |
18360aed |
12 | |
6a247f33 |
13 | __PACKAGE__->sql_limit_dialect ('RowNum'); |
2b8cc2f2 |
14 | __PACKAGE__->sql_quote_char ('"'); |
5e782048 |
15 | __PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker::Oracle'); |
16 | __PACKAGE__->datetime_parser_type('DateTime::Format::Oracle'); |
17 | |
18 | sub __cache_queries_with_max_lob_parts { 2 } |
6a247f33 |
19 | |
7137528d |
20 | =head1 NAME |
21 | |
7a84c41b |
22 | DBIx::Class::Storage::DBI::Oracle::Generic - Oracle Support for DBIx::Class |
7137528d |
23 | |
24 | =head1 SYNOPSIS |
25 | |
d88ecca6 |
26 | # In your result (table) classes |
27 | use base 'DBIx::Class::Core'; |
2e46b6eb |
28 | __PACKAGE__->add_columns({ id => { sequence => 'mysequence', auto_nextval => 1 } }); |
7137528d |
29 | __PACKAGE__->set_primary_key('id'); |
7137528d |
30 | |
c0024355 |
31 | # Somewhere in your Code |
32 | # add some data to a table with a hierarchical relationship |
33 | $schema->resultset('Person')->create ({ |
34 | firstname => 'foo', |
35 | lastname => 'bar', |
36 | children => [ |
37 | { |
38 | firstname => 'child1', |
39 | lastname => 'bar', |
40 | children => [ |
41 | { |
42 | firstname => 'grandchild', |
43 | lastname => 'bar', |
44 | } |
45 | ], |
46 | }, |
47 | { |
48 | firstname => 'child2', |
49 | lastname => 'bar', |
50 | }, |
51 | ], |
52 | }); |
53 | |
54 | # select from the hierarchical relationship |
55 | my $rs = $schema->resultset('Person')->search({}, |
56 | { |
57 | 'start_with' => { 'firstname' => 'foo', 'lastname' => 'bar' }, |
e6600283 |
58 | 'connect_by' => { 'parentid' => { '-prior' => { -ident => 'personid' } }, |
25ca709b |
59 | 'order_siblings_by' => { -asc => 'name' }, |
c0024355 |
60 | }; |
61 | ); |
62 | |
63 | # this will select the whole tree starting from person "foo bar", creating |
64 | # following query: |
65 | # SELECT |
66 | # me.persionid me.firstname, me.lastname, me.parentid |
67 | # FROM |
68 | # person me |
69 | # START WITH |
70 | # firstname = 'foo' and lastname = 'bar' |
71 | # CONNECT BY |
e6600283 |
72 | # parentid = prior personid |
c0024355 |
73 | # ORDER SIBLINGS BY |
74 | # firstname ASC |
75 | |
7137528d |
76 | =head1 DESCRIPTION |
77 | |
6c0230de |
78 | This class implements base Oracle support. The subclass |
79 | L<DBIx::Class::Storage::DBI::Oracle::WhereJoins> is for C<(+)> joins in Oracle |
86b23415 |
80 | versions before 9.0. |
7137528d |
81 | |
82 | =head1 METHODS |
83 | |
84 | =cut |
85 | |
bf51641f |
86 | sub _determine_supports_insert_returning { |
87 | my $self = shift; |
88 | |
89 | # TODO find out which version supports the RETURNING syntax |
90 | # 8i has it and earlier docs are a 404 on oracle.com |
91 | |
92 | return 1 |
93 | if $self->_server_info->{normalized_dbms_version} >= 8.001; |
94 | |
95 | return 0; |
96 | } |
97 | |
98 | __PACKAGE__->_use_insert_returning_bound (1); |
99 | |
dd2600c6 |
100 | sub deployment_statements { |
101 | my $self = shift;; |
102 | my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_; |
103 | |
104 | $sqltargs ||= {}; |
dd2600c6 |
105 | |
96736321 |
106 | if ( |
107 | ! exists $sqltargs->{producer_args}{oracle_version} |
108 | and |
109 | my $dver = $self->_server_info->{dbms_version} |
110 | ) { |
111 | $sqltargs->{producer_args}{oracle_version} = $dver; |
112 | } |
a4433d8e |
113 | |
38aead8e |
114 | $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest); |
dd2600c6 |
115 | } |
116 | |
18360aed |
117 | sub _dbh_last_insert_id { |
2e46b6eb |
118 | my ($self, $dbh, $source, @columns) = @_; |
119 | my @ids = (); |
120 | foreach my $col (@columns) { |
121 | my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col)); |
07cda1c5 |
122 | my $id = $self->_sequence_fetch( 'CURRVAL', $seq ); |
2e46b6eb |
123 | push @ids, $id; |
124 | } |
125 | return @ids; |
18360aed |
126 | } |
127 | |
128 | sub _dbh_get_autoinc_seq { |
129 | my ($self, $dbh, $source, $col) = @_; |
130 | |
032b2366 |
131 | my $sql_maker = $self->sql_maker; |
07cda1c5 |
132 | my ($ql, $qr) = map { $_ ? (quotemeta $_) : '' } $sql_maker->_quote_chars; |
cb464582 |
133 | |
e6dd7b42 |
134 | my $source_name; |
032b2366 |
135 | if ( ref $source->name eq 'SCALAR' ) { |
136 | $source_name = ${$source->name}; |
07cda1c5 |
137 | |
138 | # the ALL_TRIGGERS match further on is case sensitive - thus uppercase |
139 | # stuff unless it is already quoted |
140 | $source_name = uc ($source_name) if $source_name !~ /\"/; |
e6dd7b42 |
141 | } |
142 | else { |
032b2366 |
143 | $source_name = $source->name; |
07cda1c5 |
144 | $source_name = uc($source_name) unless $ql; |
e6dd7b42 |
145 | } |
38aead8e |
146 | |
032b2366 |
147 | # trigger_body is a LONG |
148 | local $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024); |
149 | |
150 | # disable default bindtype |
151 | local $sql_maker->{bindtype} = 'normal'; |
152 | |
153 | # look up the correct sequence automatically |
07cda1c5 |
154 | my ( $schema, $table ) = $source_name =~ /( (?:${ql})? \w+ (?:${qr})? ) \. ( (?:${ql})? \w+ (?:${qr})? )/x; |
a6646e1b |
155 | |
156 | # if no explicit schema was requested - use the default schema (which in the case of Oracle is the db user) |
fcb52f08 |
157 | $schema ||= \'= USER'; |
a6646e1b |
158 | |
032b2366 |
159 | my ($sql, @bind) = $sql_maker->select ( |
160 | 'ALL_TRIGGERS', |
07cda1c5 |
161 | [qw/TRIGGER_BODY TABLE_OWNER TRIGGER_NAME/], |
032b2366 |
162 | { |
630eee41 |
163 | OWNER => $schema, |
07cda1c5 |
164 | TABLE_NAME => $table || $source_name, |
165 | TRIGGERING_EVENT => { -like => '%INSERT%' }, # this will also catch insert_or_update |
166 | TRIGGER_TYPE => { -like => '%BEFORE%' }, # we care only about 'before' triggers |
167 | STATUS => 'ENABLED', |
032b2366 |
168 | }, |
169 | ); |
e6dd7b42 |
170 | |
6f5f880d |
171 | # to find all the triggers that mention the column in question a simple |
172 | # regex grep since the trigger_body above is a LONG and hence not searchable |
630eee41 |
173 | # via -like |
6f5f880d |
174 | my @triggers = ( map |
175 | { my %inf; @inf{qw/body schema name/} = @$_; \%inf } |
176 | ( grep |
07cda1c5 |
177 | { $_->[0] =~ /\:new\.${ql}${col}${qr} | \:new\.$col/xi } |
6f5f880d |
178 | @{ $dbh->selectall_arrayref( $sql, {}, @bind ) } |
179 | ) |
180 | ); |
181 | |
630eee41 |
182 | # extract all sequence names mentioned in each trigger, throw away |
183 | # triggers without apparent sequences |
184 | @triggers = map { |
185 | my @seqs = $_->{body} =~ / ( [\.\w\"\-]+ ) \. nextval /xig; |
186 | @seqs |
187 | ? { %$_, sequences => \@seqs } |
188 | : () |
189 | ; |
190 | } @triggers; |
6f5f880d |
191 | |
192 | my $chosen_trigger; |
193 | |
194 | # if only one trigger matched things are easy |
195 | if (@triggers == 1) { |
196 | |
197 | if ( @{$triggers[0]{sequences}} == 1 ) { |
198 | $chosen_trigger = $triggers[0]; |
199 | } |
200 | else { |
201 | $self->throw_exception( sprintf ( |
e705f529 |
202 | "Unable to introspect trigger '%s' for column '%s.%s' (references multiple sequences). " |
6f5f880d |
203 | . "You need to specify the correct 'sequence' explicitly in '%s's column_info.", |
204 | $triggers[0]{name}, |
205 | $source_name, |
206 | $col, |
207 | $col, |
208 | ) ); |
209 | } |
210 | } |
211 | # got more than one matching trigger - see if we can narrow it down |
212 | elsif (@triggers > 1) { |
df6e3f5c |
213 | |
6f5f880d |
214 | my @candidates = grep |
215 | { $_->{body} =~ / into \s+ \:new\.$col /xi } |
216 | @triggers |
217 | ; |
df6e3f5c |
218 | |
6f5f880d |
219 | if (@candidates == 1 && @{$candidates[0]{sequences}} == 1) { |
220 | $chosen_trigger = $candidates[0]; |
df6e3f5c |
221 | } |
6f5f880d |
222 | else { |
223 | $self->throw_exception( sprintf ( |
e705f529 |
224 | "Unable to reliably select a BEFORE INSERT trigger for column '%s.%s' (possibilities: %s). " |
6f5f880d |
225 | . "You need to specify the correct 'sequence' explicitly in '%s's column_info.", |
226 | $source_name, |
227 | $col, |
228 | ( join ', ', map { "'$_->{name}'" } @triggers ), |
229 | $col, |
230 | ) ); |
231 | } |
232 | } |
233 | |
234 | if ($chosen_trigger) { |
235 | my $seq_name = $chosen_trigger->{sequences}[0]; |
236 | |
237 | $seq_name = "$chosen_trigger->{schema}.$seq_name" |
238 | unless $seq_name =~ /\./; |
df6e3f5c |
239 | |
07cda1c5 |
240 | return \$seq_name if $seq_name =~ /\"/; # may already be quoted in-trigger |
df6e3f5c |
241 | return $seq_name; |
18360aed |
242 | } |
6f5f880d |
243 | |
244 | $self->throw_exception( sprintf ( |
e705f529 |
245 | "No suitable BEFORE INSERT triggers found for column '%s.%s'. " |
6f5f880d |
246 | . "You need to specify the correct 'sequence' explicitly in '%s's column_info.", |
247 | $source_name, |
248 | $col, |
249 | $col, |
250 | )); |
18360aed |
251 | } |
252 | |
2e46b6eb |
253 | sub _sequence_fetch { |
254 | my ( $self, $type, $seq ) = @_; |
07cda1c5 |
255 | |
256 | # use the maker to leverage quoting settings |
e6f3272b |
257 | my $sth = $self->_dbh->prepare_cached( |
258 | $self->sql_maker->select('DUAL', [ ref $seq ? \"$$seq.$type" : "$seq.$type" ] ) |
259 | ); |
260 | $sth->execute; |
261 | my ($id) = $sth->fetchrow_array; |
262 | $sth->finish; |
2e46b6eb |
263 | return $id; |
264 | } |
265 | |
6dc4be0f |
266 | sub _ping { |
c2481821 |
267 | my $self = shift; |
7ba7a57d |
268 | |
6dc4be0f |
269 | my $dbh = $self->_dbh or return 0; |
7ba7a57d |
270 | |
6dc4be0f |
271 | local $dbh->{RaiseError} = 1; |
ecdf1ac8 |
272 | local $dbh->{PrintError} = 0; |
c2d7baef |
273 | |
ddcc02d1 |
274 | ( dbic_internal_try { |
ecdf1ac8 |
275 | $dbh->do('select 1 from dual'); |
52b420dd |
276 | 1; |
ddcc02d1 |
277 | }) |
278 | ? 1 |
279 | : 0 |
280 | ; |
c2481821 |
281 | } |
282 | |
d789fa99 |
283 | sub _dbh_execute { |
9930caaf |
284 | #my ($self, $dbh, $sql, $bind, $bind_attrs) = @_; |
7d534e68 |
285 | my ($self, $sql, $bind) = @_[0,2,3]; |
a6ae092b |
286 | |
4b8a53ea |
287 | # Turn off sth caching for multi-part LOBs. See _prep_for_execute below |
87b12551 |
288 | local $self->{disable_sth_caching} = 1 if grep { |
a6ae092b |
289 | ($_->[0]{_ora_lob_autosplit_part}||0) |
290 | > |
291 | (__cache_queries_with_max_lob_parts - 1) |
292 | } @$bind; |
d789fa99 |
293 | |
4f661051 |
294 | my $next = $self->next::can; |
87560ef9 |
295 | |
a6ae092b |
296 | # if we are already in a txn we can't retry anything |
297 | return shift->$next(@_) |
298 | if $self->transaction_depth; |
299 | |
7d534e68 |
300 | # cheat the blockrunner we are just about to create |
301 | # we do want to rerun things regardless of outer state |
a6ae092b |
302 | local $self->{_in_do_block}; |
303 | |
304 | return DBIx::Class::Storage::BlockRunner->new( |
305 | storage => $self, |
a6ae092b |
306 | wrap_txn => 0, |
307 | retry_handler => sub { |
308 | # ORA-01003: no statement parsed (someone changed the table somehow, |
309 | # invalidating your cursor.) |
7d534e68 |
310 | if ( |
311 | $_[0]->failed_attempt_count == 1 |
312 | and |
313 | $_[0]->last_exception =~ /ORA-01003/ |
314 | and |
315 | my $dbh = $_[0]->storage->_dbh |
316 | ) { |
317 | delete $dbh->{CachedKids}{$sql}; |
318 | return 1; |
319 | } |
320 | else { |
321 | return 0; |
52b420dd |
322 | } |
a6ae092b |
323 | }, |
7d534e68 |
324 | )->run( $next, @_ ); |
d789fa99 |
325 | } |
326 | |
52cef7e3 |
327 | sub _dbh_execute_for_fetch { |
7b731f1e |
328 | #my ($self, $source, $sth, $proto_bind, $cols, $data) = @_; |
a5a27e7a |
329 | |
7b731f1e |
330 | # Older DBD::Oracle warns loudly on partial execute_for_fetch failures |
331 | # before https://metacpan.org/source/PYTHIAN/DBD-Oracle-1.28/Changes#L7-9 |
332 | local $_[2]->{PrintWarn} = 0 |
333 | unless modver_gt_or_eq( 'DBD::Oracle', '1.28' ); |
a5a27e7a |
334 | |
335 | shift->next::method(@_); |
336 | } |
337 | |
7137528d |
338 | =head2 get_autoinc_seq |
339 | |
340 | Returns the sequence name for an autoincrement column |
341 | |
342 | =cut |
343 | |
18360aed |
344 | sub get_autoinc_seq { |
345 | my ($self, $source, $col) = @_; |
d4daee7b |
346 | |
373940e1 |
347 | $self->dbh_do('_dbh_get_autoinc_seq', $source, $col); |
18360aed |
348 | } |
349 | |
8f7e044c |
350 | =head2 datetime_parser_type |
351 | |
352 | This sets the proper DateTime::Format module for use with |
353 | L<DBIx::Class::InflateColumn::DateTime>. |
354 | |
9900b569 |
355 | =head2 connect_call_datetime_setup |
d2a3958e |
356 | |
357 | Used as: |
358 | |
9900b569 |
359 | on_connect_call => 'datetime_setup' |
d2a3958e |
360 | |
8384a713 |
361 | In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set the session nls |
362 | date, and timestamp values for use with L<DBIx::Class::InflateColumn::DateTime> |
363 | and the necessary environment variables for L<DateTime::Format::Oracle>, which |
364 | is used by it. |
d2a3958e |
365 | |
82f6f45f |
366 | Maximum allowable precision is used, unless the environment variables have |
367 | already been set. |
d2a3958e |
368 | |
9900b569 |
369 | These are the defaults used: |
370 | |
371 | $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; |
372 | $ENV{NLS_TIMESTAMP_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF'; |
373 | $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; |
374 | |
d9e53b85 |
375 | To get more than second precision with L<DBIx::Class::InflateColumn::DateTime> |
376 | for your timestamps, use something like this: |
377 | |
378 | use Time::HiRes 'time'; |
379 | my $ts = DateTime->from_epoch(epoch => time); |
380 | |
d2a3958e |
381 | =cut |
382 | |
9900b569 |
383 | sub connect_call_datetime_setup { |
d2a3958e |
384 | my $self = shift; |
d2a3958e |
385 | |
386 | my $date_format = $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; |
387 | my $timestamp_format = $ENV{NLS_TIMESTAMP_FORMAT} ||= |
388 | 'YYYY-MM-DD HH24:MI:SS.FF'; |
389 | my $timestamp_tz_format = $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= |
390 | 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; |
391 | |
7a84c41b |
392 | $self->_do_query( |
d7a58a29 |
393 | "alter session set nls_date_format = '$date_format'" |
394 | ); |
7a84c41b |
395 | $self->_do_query( |
d7a58a29 |
396 | "alter session set nls_timestamp_format = '$timestamp_format'" |
397 | ); |
7a84c41b |
398 | $self->_do_query( |
d7a58a29 |
399 | "alter session set nls_timestamp_tz_format='$timestamp_tz_format'" |
400 | ); |
d2a3958e |
401 | } |
402 | |
0e773352 |
403 | ### Note originally by Ron "Quinn" Straight <quinnfazigu@gmail.org> |
404 | ### http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=dbsrgits/DBIx-Class.git;a=commitdiff;h=5db2758de644d53e07cd3e05f0e9037bf40116fc |
405 | # |
406 | # Handle LOB types in Oracle. Under a certain size (4k?), you can get away |
407 | # with the driver assuming your input is the deprecated LONG type if you |
408 | # encode it as a hex string. That ain't gonna fly at larger values, where |
409 | # you'll discover you have to do what this does. |
410 | # |
411 | # This method had to be overridden because we need to set ora_field to the |
412 | # actual column, and that isn't passed to the call (provided by Storage) to |
413 | # bind_attribute_by_data_type. |
414 | # |
415 | # According to L<DBD::Oracle>, the ora_field isn't always necessary, but |
416 | # adding it doesn't hurt, and will save your bacon if you're modifying a |
417 | # table with more than one LOB column. |
418 | # |
419 | sub _dbi_attrs_for_bind { |
420 | my ($self, $ident, $bind) = @_; |
00a28188 |
421 | |
0e773352 |
422 | my $attrs = $self->next::method($ident, $bind); |
423 | |
74113bd1 |
424 | # Push the column name into all bind attrs, make sure to *NOT* write into |
425 | # the existing $attrs->[$idx]{..} hashref, as it is cached by the call to |
426 | # next::method above. |
e7b6c2a4 |
427 | # FIXME - this code will go away when the LobWriter refactor lands |
74113bd1 |
428 | $attrs->[$_] |
429 | and |
430 | keys %{ $attrs->[$_] } |
431 | and |
432 | $bind->[$_][0]{dbic_colname} |
433 | and |
434 | $attrs->[$_] = { %{$attrs->[$_]}, ora_field => $bind->[$_][0]{dbic_colname} } |
435 | for 0 .. $#$attrs; |
5db2758d |
436 | |
0e773352 |
437 | $attrs; |
438 | } |
5db2758d |
439 | |
0e773352 |
440 | sub bind_attribute_by_data_type { |
441 | my ($self, $dt) = @_; |
442 | |
8892d8e5 |
443 | if ($self->_is_lob_type($dt)) { |
444 | |
7302b3e0 |
445 | # no earlier - no later |
446 | $self->throw_exception( |
447 | "BLOB/CLOB support in DBD::Oracle == 1.23 is broken, use an earlier or later " |
448 | . "version (https://rt.cpan.org/Public/Bug/Display.html?id=46016)" |
449 | ) if modver_gt_or_eq_and_lt( 'DBD::Oracle', '1.23', '1.24' ); |
5db2758d |
450 | |
0e773352 |
451 | return { |
452 | ora_type => $self->_is_text_lob_type($dt) |
d7a58a29 |
453 | ? DBD::Oracle::ORA_CLOB() |
454 | : DBD::Oracle::ORA_BLOB() |
0e773352 |
455 | }; |
d7a58a29 |
456 | } |
8892d8e5 |
457 | else { |
458 | return undef; |
459 | } |
5db2758d |
460 | } |
461 | |
00a28188 |
462 | # Handle blob columns in WHERE. |
463 | # |
464 | # For equality comparisons: |
465 | # |
466 | # We split data intended for comparing to a LOB into 2000 character chunks and |
467 | # compare them using dbms_lob.substr on the LOB column. |
468 | # |
469 | # We turn off DBD::Oracle LOB binds for these partial LOB comparisons by passing |
470 | # dbd_attrs => undef, because these are regular varchar2 comparisons and |
471 | # otherwise the query will fail. |
472 | # |
473 | # Since the most common comparison size is likely to be under 4000 characters |
474 | # (TEXT comparisons previously deployed to other RDBMSes) we disable |
475 | # prepare_cached for queries with more than two part comparisons to a LOB |
476 | # column. This is done in _dbh_execute (above) which was previously overridden |
477 | # to gracefully recover from an Oracle error. This is to be careful to not |
478 | # exhaust your application's open cursor limit. |
479 | # |
480 | # See: |
481 | # http://itcareershift.com/blog1/2011/02/21/oracle-max-number-of-open-cursors-complete-reference-for-the-new-oracle-dba/ |
482 | # on the open_cursor limit. |
483 | # |
484 | # For everything else: |
485 | # |
486 | # We assume that everything that is not a LOB comparison, will most likely be a |
487 | # LIKE query or some sort of function invocation. This may prove to be a naive |
488 | # assumption in the future, but for now it should cover the two most likely |
489 | # things users would want to do with a BLOB or CLOB, an equality test or a LIKE |
490 | # query (on a CLOB.) |
491 | # |
492 | # For these expressions, the bind must NOT have the attributes of a LOB bind for |
493 | # DBD::Oracle, otherwise the query will fail. This is done by passing |
494 | # dbd_attrs => undef. |
495 | |
496 | sub _prep_for_execute { |
497 | my $self = shift; |
498 | my ($op) = @_; |
499 | |
00819de0 |
500 | return $self->next::method(@_) |
501 | if $op eq 'insert'; |
00a28188 |
502 | |
00819de0 |
503 | my ($sql, $bind) = $self->next::method(@_); |
00a28188 |
504 | |
00819de0 |
505 | my $lob_bind_indices = { map { |
506 | ( |
5e782048 |
507 | $bind->[$_][0]{sqlt_datatype} |
00819de0 |
508 | and |
509 | $self->_is_lob_type($bind->[$_][0]{sqlt_datatype}) |
510 | ) ? ( $_ => 1 ) : () |
511 | } ( 0 .. $#$bind ) }; |
00a28188 |
512 | |
00819de0 |
513 | return ($sql, $bind) unless %$lob_bind_indices; |
00a28188 |
514 | |
00819de0 |
515 | my ($final_sql, @final_binds); |
516 | if ($op eq 'update') { |
e705f529 |
517 | $self->throw_exception('Update with complex WHERE clauses involving BLOB columns currently not supported') |
5e782048 |
518 | if $sql =~ /\bWHERE\b .+ \bWHERE\b/xs; |
519 | |
e12571af |
520 | my $where_sql; |
521 | ($final_sql, $where_sql) = $sql =~ /^ (.+?) ( \bWHERE\b .+) /xs; |
00819de0 |
522 | |
523 | if (my $set_bind_count = $final_sql =~ y/?//) { |
5e782048 |
524 | |
00819de0 |
525 | delete $lob_bind_indices->{$_} for (0 .. ($set_bind_count - 1)); |
5e782048 |
526 | |
00819de0 |
527 | # bail if only the update part contains blobs |
528 | return ($sql, $bind) unless %$lob_bind_indices; |
529 | |
530 | @final_binds = splice @$bind, 0, $set_bind_count; |
531 | $lob_bind_indices = { map |
532 | { $_ - $set_bind_count => $lob_bind_indices->{$_} } |
533 | keys %$lob_bind_indices |
534 | }; |
535 | } |
e12571af |
536 | |
537 | # if we got that far - assume the where SQL is all we got |
538 | # (the first part is already shoved into $final_sql) |
539 | $sql = $where_sql; |
5e782048 |
540 | } |
00819de0 |
541 | elsif ($op ne 'select' and $op ne 'delete') { |
5e782048 |
542 | $self->throw_exception("Unsupported \$op: $op"); |
543 | } |
544 | |
00819de0 |
545 | my @sql_parts = split /\?/, $sql; |
546 | |
5e782048 |
547 | my $col_equality_re = qr/ (?<=\s) ([\w."]+) (\s*=\s*) $/x; |
548 | |
549 | for my $b_idx (0 .. $#$bind) { |
550 | my $bound = $bind->[$b_idx]; |
551 | |
00819de0 |
552 | if ( |
553 | $lob_bind_indices->{$b_idx} |
554 | and |
555 | my ($col, $eq) = $sql_parts[0] =~ $col_equality_re |
556 | ) { |
557 | my $data = $bound->[1]; |
00a28188 |
558 | |
00819de0 |
559 | $data = "$data" if ref $data; |
00a28188 |
560 | |
00819de0 |
561 | my @parts = unpack '(a2000)*', $data; |
00a28188 |
562 | |
00819de0 |
563 | my @sql_frag; |
00a28188 |
564 | |
00819de0 |
565 | for my $idx (0..$#parts) { |
566 | push @sql_frag, sprintf ( |
567 | 'UTL_RAW.CAST_TO_VARCHAR2(RAWTOHEX(DBMS_LOB.SUBSTR(%s, 2000, %d))) = ?', |
568 | $col, ($idx*2000 + 1), |
569 | ); |
570 | } |
00a28188 |
571 | |
00819de0 |
572 | my $sql_frag = '( ' . (join ' AND ', @sql_frag) . ' )'; |
00a28188 |
573 | |
00819de0 |
574 | $sql_parts[0] =~ s/$col_equality_re/$sql_frag/; |
00a28188 |
575 | |
00819de0 |
576 | $final_sql .= shift @sql_parts; |
00a28188 |
577 | |
00819de0 |
578 | for my $idx (0..$#parts) { |
579 | push @final_binds, [ |
00a28188 |
580 | { |
581 | %{ $bound->[0] }, |
00819de0 |
582 | _ora_lob_autosplit_part => $idx, |
00a28188 |
583 | dbd_attrs => undef, |
584 | }, |
00819de0 |
585 | $parts[$idx] |
00a28188 |
586 | ]; |
587 | } |
588 | } |
589 | else { |
00819de0 |
590 | $final_sql .= shift(@sql_parts) . '?'; |
591 | push @final_binds, $lob_bind_indices->{$b_idx} |
592 | ? [ |
593 | { |
594 | %{ $bound->[0] }, |
595 | dbd_attrs => undef, |
596 | }, |
597 | $bound->[1], |
598 | ] : $bound |
599 | ; |
00a28188 |
600 | } |
601 | } |
5e782048 |
602 | |
603 | if (@sql_parts > 1) { |
604 | carp "There are more placeholders than binds, this should not happen!"; |
605 | @sql_parts = join ('?', @sql_parts); |
606 | } |
607 | |
00819de0 |
608 | $final_sql .= $sql_parts[0]; |
00a28188 |
609 | |
00819de0 |
610 | return ($final_sql, \@final_binds); |
00a28188 |
611 | } |
612 | |
613 | # Savepoints stuff. |
614 | |
90d7422f |
615 | sub _exec_svp_begin { |
d7a58a29 |
616 | my ($self, $name) = @_; |
90d7422f |
617 | $self->_dbh->do("SAVEPOINT $name"); |
1816be4f |
618 | } |
619 | |
281719d2 |
620 | # Oracle automatically releases a savepoint when you start another one with the |
621 | # same name. |
90d7422f |
622 | sub _exec_svp_release { 1 } |
281719d2 |
623 | |
90d7422f |
624 | sub _exec_svp_rollback { |
d7a58a29 |
625 | my ($self, $name) = @_; |
90d7422f |
626 | $self->_dbh->do("ROLLBACK TO SAVEPOINT $name") |
281719d2 |
627 | } |
628 | |
6c0230de |
629 | =head2 relname_to_table_alias |
630 | |
631 | L<DBIx::Class> uses L<DBIx::Class::Relationship> names as table aliases in |
632 | queries. |
633 | |
634 | Unfortunately, Oracle doesn't support identifiers over 30 chars in length, so |
af0edca1 |
635 | the L<DBIx::Class::Relationship> name is shortened and appended with half of an |
636 | MD5 hash. |
6c0230de |
637 | |
5529838f |
638 | See L<DBIx::Class::Storage::DBI/relname_to_table_alias>. |
6c0230de |
639 | |
640 | =cut |
641 | |
642 | sub relname_to_table_alias { |
643 | my $self = shift; |
644 | my ($relname, $join_count) = @_; |
645 | |
646 | my $alias = $self->next::method(@_); |
647 | |
19c4cc62 |
648 | # we need to shorten here in addition to the shortening in SQLA itself, |
d07f715d |
649 | # since the final relnames are crucial for the join optimizer |
19c4cc62 |
650 | return $self->sql_maker->_shorten_identifier($alias); |
6c0230de |
651 | } |
652 | |
6c0bb6a7 |
653 | =head2 with_deferred_fk_checks |
654 | |
655 | Runs a coderef between: |
656 | |
657 | alter session set constraints = deferred |
658 | ... |
659 | alter session set constraints = immediate |
660 | |
b7b18f32 |
661 | to defer foreign key checks. |
662 | |
663 | Constraints must be declared C<DEFERRABLE> for this to work. |
6c0bb6a7 |
664 | |
665 | =cut |
666 | |
667 | sub with_deferred_fk_checks { |
668 | my ($self, $sub) = @_; |
b7b18f32 |
669 | |
670 | my $txn_scope_guard = $self->txn_scope_guard; |
671 | |
6c0bb6a7 |
672 | $self->_do_query('alter session set constraints = deferred'); |
54161a15 |
673 | |
b7b18f32 |
674 | my $sg = Scope::Guard->new(sub { |
675 | $self->_do_query('alter session set constraints = immediate'); |
676 | }); |
281719d2 |
677 | |
6298a324 |
678 | return |
679 | preserve_context { $sub->() } after => sub { $txn_scope_guard->commit }; |
281719d2 |
680 | } |
681 | |
c0024355 |
682 | =head1 ATTRIBUTES |
683 | |
684 | Following additional attributes can be used in resultsets. |
685 | |
6b2fbbf0 |
686 | =head2 connect_by or connect_by_nocycle |
c0024355 |
687 | |
688 | =over 4 |
689 | |
690 | =item Value: \%connect_by |
691 | |
692 | =back |
693 | |
694 | A hashref of conditions used to specify the relationship between parent rows |
695 | and child rows of the hierarchy. |
696 | |
6b2fbbf0 |
697 | |
c0024355 |
698 | connect_by => { parentid => 'prior personid' } |
699 | |
700 | # adds a connect by statement to the query: |
701 | # SELECT |
702 | # me.persionid me.firstname, me.lastname, me.parentid |
703 | # FROM |
704 | # person me |
705 | # CONNECT BY |
706 | # parentid = prior persionid |
8273e845 |
707 | |
c0024355 |
708 | |
6b2fbbf0 |
709 | connect_by_nocycle => { parentid => 'prior personid' } |
2ba03b16 |
710 | |
6b2fbbf0 |
711 | # adds a connect by statement to the query: |
712 | # SELECT |
713 | # me.persionid me.firstname, me.lastname, me.parentid |
714 | # FROM |
715 | # person me |
716 | # CONNECT BY NOCYCLE |
717 | # parentid = prior persionid |
2ba03b16 |
718 | |
719 | |
c0024355 |
720 | =head2 start_with |
721 | |
722 | =over 4 |
723 | |
724 | =item Value: \%condition |
725 | |
726 | =back |
727 | |
728 | A hashref of conditions which specify the root row(s) of the hierarchy. |
729 | |
730 | It uses the same syntax as L<DBIx::Class::ResultSet/search> |
731 | |
732 | start_with => { firstname => 'Foo', lastname => 'Bar' } |
733 | |
734 | # SELECT |
735 | # me.persionid me.firstname, me.lastname, me.parentid |
736 | # FROM |
737 | # person me |
738 | # START WITH |
739 | # firstname = 'foo' and lastname = 'bar' |
740 | # CONNECT BY |
741 | # parentid = prior persionid |
742 | |
743 | =head2 order_siblings_by |
744 | |
745 | =over 4 |
746 | |
747 | =item Value: ($order_siblings_by | \@order_siblings_by) |
748 | |
749 | =back |
750 | |
751 | Which column(s) to order the siblings by. |
752 | |
753 | It uses the same syntax as L<DBIx::Class::ResultSet/order_by> |
754 | |
755 | 'order_siblings_by' => 'firstname ASC' |
756 | |
757 | # SELECT |
758 | # me.persionid me.firstname, me.lastname, me.parentid |
759 | # FROM |
760 | # person me |
761 | # CONNECT BY |
762 | # parentid = prior persionid |
763 | # ORDER SIBLINGS BY |
764 | # firstname ASC |
765 | |
a2bd3796 |
766 | =head1 FURTHER QUESTIONS? |
18360aed |
767 | |
a2bd3796 |
768 | Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>. |
18360aed |
769 | |
a2bd3796 |
770 | =head1 COPYRIGHT AND LICENSE |
18360aed |
771 | |
a2bd3796 |
772 | This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE> |
773 | by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can |
774 | redistribute it and/or modify it under the same terms as the |
775 | L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>. |
18360aed |
776 | |
777 | =cut |
7137528d |
778 | |
779 | 1; |
00a28188 |
780 | # vim:sts=2 sw=2: |