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'; |
ed7ab0f4 |
10 | use Try::Tiny; |
00a28188 |
11 | use List::Util 'first'; |
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 ||= {}; |
032b2366 |
106 | my $quote_char = $self->schema->storage->sql_maker->quote_char; |
107 | $sqltargs->{quote_table_names} = $quote_char ? 1 : 0; |
108 | $sqltargs->{quote_field_names} = $quote_char ? 1 : 0; |
dd2600c6 |
109 | |
96736321 |
110 | if ( |
111 | ! exists $sqltargs->{producer_args}{oracle_version} |
112 | and |
113 | my $dver = $self->_server_info->{dbms_version} |
114 | ) { |
115 | $sqltargs->{producer_args}{oracle_version} = $dver; |
116 | } |
a4433d8e |
117 | |
38aead8e |
118 | $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest); |
dd2600c6 |
119 | } |
120 | |
18360aed |
121 | sub _dbh_last_insert_id { |
2e46b6eb |
122 | my ($self, $dbh, $source, @columns) = @_; |
123 | my @ids = (); |
124 | foreach my $col (@columns) { |
125 | my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col)); |
07cda1c5 |
126 | my $id = $self->_sequence_fetch( 'CURRVAL', $seq ); |
2e46b6eb |
127 | push @ids, $id; |
128 | } |
129 | return @ids; |
18360aed |
130 | } |
131 | |
132 | sub _dbh_get_autoinc_seq { |
133 | my ($self, $dbh, $source, $col) = @_; |
134 | |
032b2366 |
135 | my $sql_maker = $self->sql_maker; |
07cda1c5 |
136 | my ($ql, $qr) = map { $_ ? (quotemeta $_) : '' } $sql_maker->_quote_chars; |
cb464582 |
137 | |
e6dd7b42 |
138 | my $source_name; |
032b2366 |
139 | if ( ref $source->name eq 'SCALAR' ) { |
140 | $source_name = ${$source->name}; |
07cda1c5 |
141 | |
142 | # the ALL_TRIGGERS match further on is case sensitive - thus uppercase |
143 | # stuff unless it is already quoted |
144 | $source_name = uc ($source_name) if $source_name !~ /\"/; |
e6dd7b42 |
145 | } |
146 | else { |
032b2366 |
147 | $source_name = $source->name; |
07cda1c5 |
148 | $source_name = uc($source_name) unless $ql; |
e6dd7b42 |
149 | } |
38aead8e |
150 | |
032b2366 |
151 | # trigger_body is a LONG |
152 | local $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024); |
153 | |
154 | # disable default bindtype |
155 | local $sql_maker->{bindtype} = 'normal'; |
156 | |
157 | # look up the correct sequence automatically |
07cda1c5 |
158 | my ( $schema, $table ) = $source_name =~ /( (?:${ql})? \w+ (?:${qr})? ) \. ( (?:${ql})? \w+ (?:${qr})? )/x; |
a6646e1b |
159 | |
160 | # if no explicit schema was requested - use the default schema (which in the case of Oracle is the db user) |
fcb52f08 |
161 | $schema ||= \'= USER'; |
a6646e1b |
162 | |
032b2366 |
163 | my ($sql, @bind) = $sql_maker->select ( |
164 | 'ALL_TRIGGERS', |
07cda1c5 |
165 | [qw/TRIGGER_BODY TABLE_OWNER TRIGGER_NAME/], |
032b2366 |
166 | { |
07cda1c5 |
167 | $schema ? (OWNER => $schema) : (), |
168 | TABLE_NAME => $table || $source_name, |
169 | TRIGGERING_EVENT => { -like => '%INSERT%' }, # this will also catch insert_or_update |
170 | TRIGGER_TYPE => { -like => '%BEFORE%' }, # we care only about 'before' triggers |
171 | STATUS => 'ENABLED', |
032b2366 |
172 | }, |
173 | ); |
e6dd7b42 |
174 | |
6f5f880d |
175 | # to find all the triggers that mention the column in question a simple |
176 | # regex grep since the trigger_body above is a LONG and hence not searchable |
177 | my @triggers = ( map |
178 | { my %inf; @inf{qw/body schema name/} = @$_; \%inf } |
179 | ( grep |
07cda1c5 |
180 | { $_->[0] =~ /\:new\.${ql}${col}${qr} | \:new\.$col/xi } |
6f5f880d |
181 | @{ $dbh->selectall_arrayref( $sql, {}, @bind ) } |
182 | ) |
183 | ); |
184 | |
185 | # extract all sequence names mentioned in each trigger |
186 | for (@triggers) { |
187 | $_->{sequences} = [ $_->{body} =~ / ( "? [\.\w\"\-]+ "? ) \. nextval /xig ]; |
188 | } |
189 | |
190 | my $chosen_trigger; |
191 | |
192 | # if only one trigger matched things are easy |
193 | if (@triggers == 1) { |
194 | |
195 | if ( @{$triggers[0]{sequences}} == 1 ) { |
196 | $chosen_trigger = $triggers[0]; |
197 | } |
198 | else { |
199 | $self->throw_exception( sprintf ( |
200 | "Unable to introspect trigger '%s' for column %s.%s (references multiple sequences). " |
201 | . "You need to specify the correct 'sequence' explicitly in '%s's column_info.", |
202 | $triggers[0]{name}, |
203 | $source_name, |
204 | $col, |
205 | $col, |
206 | ) ); |
207 | } |
208 | } |
209 | # got more than one matching trigger - see if we can narrow it down |
210 | elsif (@triggers > 1) { |
df6e3f5c |
211 | |
6f5f880d |
212 | my @candidates = grep |
213 | { $_->{body} =~ / into \s+ \:new\.$col /xi } |
214 | @triggers |
215 | ; |
df6e3f5c |
216 | |
6f5f880d |
217 | if (@candidates == 1 && @{$candidates[0]{sequences}} == 1) { |
218 | $chosen_trigger = $candidates[0]; |
df6e3f5c |
219 | } |
6f5f880d |
220 | else { |
221 | $self->throw_exception( sprintf ( |
222 | "Unable to reliably select a BEFORE INSERT trigger for column %s.%s (possibilities: %s). " |
223 | . "You need to specify the correct 'sequence' explicitly in '%s's column_info.", |
224 | $source_name, |
225 | $col, |
226 | ( join ', ', map { "'$_->{name}'" } @triggers ), |
227 | $col, |
228 | ) ); |
229 | } |
230 | } |
231 | |
232 | if ($chosen_trigger) { |
233 | my $seq_name = $chosen_trigger->{sequences}[0]; |
234 | |
235 | $seq_name = "$chosen_trigger->{schema}.$seq_name" |
236 | unless $seq_name =~ /\./; |
df6e3f5c |
237 | |
07cda1c5 |
238 | return \$seq_name if $seq_name =~ /\"/; # may already be quoted in-trigger |
df6e3f5c |
239 | return $seq_name; |
18360aed |
240 | } |
6f5f880d |
241 | |
242 | $self->throw_exception( sprintf ( |
243 | "No suitable BEFORE INSERT triggers found for column %s.%s. " |
244 | . "You need to specify the correct 'sequence' explicitly in '%s's column_info.", |
245 | $source_name, |
246 | $col, |
247 | $col, |
248 | )); |
18360aed |
249 | } |
250 | |
2e46b6eb |
251 | sub _sequence_fetch { |
252 | my ( $self, $type, $seq ) = @_; |
07cda1c5 |
253 | |
254 | # use the maker to leverage quoting settings |
255 | my $sql_maker = $self->sql_maker; |
256 | my ($id) = $self->_get_dbh->selectrow_array ($sql_maker->select('DUAL', [ ref $seq ? \"$$seq.$type" : "$seq.$type" ] ) ); |
2e46b6eb |
257 | return $id; |
258 | } |
259 | |
6dc4be0f |
260 | sub _ping { |
c2481821 |
261 | my $self = shift; |
7ba7a57d |
262 | |
6dc4be0f |
263 | my $dbh = $self->_dbh or return 0; |
7ba7a57d |
264 | |
6dc4be0f |
265 | local $dbh->{RaiseError} = 1; |
ecdf1ac8 |
266 | local $dbh->{PrintError} = 0; |
c2d7baef |
267 | |
52b420dd |
268 | return try { |
ecdf1ac8 |
269 | $dbh->do('select 1 from dual'); |
52b420dd |
270 | 1; |
ed7ab0f4 |
271 | } catch { |
52b420dd |
272 | 0; |
6dc4be0f |
273 | }; |
c2481821 |
274 | } |
275 | |
d789fa99 |
276 | sub _dbh_execute { |
0e773352 |
277 | my ($self, $dbh, $sql, @args) = @_; |
d789fa99 |
278 | |
87560ef9 |
279 | my (@res, $tried); |
cca282b6 |
280 | my $want = wantarray; |
4f661051 |
281 | my $next = $self->next::can; |
87560ef9 |
282 | do { |
52b420dd |
283 | try { |
00a28188 |
284 | my $exec = sub { |
285 | # Turn off sth caching for multi-part LOBs. See _prep_for_execute above. |
286 | local $self->{disable_sth_caching} = 1 |
287 | if first { |
288 | ($_->[0]{_ora_lob_autosplit_part}||0) |
289 | > (__cache_queries_with_max_lob_parts-1) |
290 | } @{ $args[0] }; |
291 | |
292 | $self->$next($dbh, $sql, @args) |
293 | }; |
dd415de8 |
294 | |
cca282b6 |
295 | if (!defined $want) { |
dd415de8 |
296 | $exec->(); |
297 | } |
cca282b6 |
298 | elsif (! $want) { |
dd415de8 |
299 | $res[0] = $exec->(); |
300 | } |
301 | else { |
302 | @res = $exec->(); |
303 | } |
87560ef9 |
304 | |
305 | $tried++; |
52b420dd |
306 | } |
307 | catch { |
87560ef9 |
308 | if (! $tried and $_ =~ /ORA-01003/) { |
0f0abc97 |
309 | # ORA-01003: no statement parsed (someone changed the table somehow, |
310 | # invalidating your cursor.) |
0f0abc97 |
311 | delete $dbh->{CachedKids}{$sql}; |
d789fa99 |
312 | } |
52b420dd |
313 | else { |
314 | $self->throw_exception($_); |
315 | } |
316 | }; |
87560ef9 |
317 | } while (! $tried++); |
d789fa99 |
318 | |
cca282b6 |
319 | return wantarray ? @res : $res[0]; |
d789fa99 |
320 | } |
321 | |
a5a27e7a |
322 | sub _dbh_execute_array { |
323 | #my ($self, $sth, $tuple_status, @extra) = @_; |
324 | |
325 | # DBD::Oracle warns loudly on partial execute_array failures |
326 | local $_[1]->{PrintWarn} = 0; |
327 | |
328 | shift->next::method(@_); |
329 | } |
330 | |
7137528d |
331 | =head2 get_autoinc_seq |
332 | |
333 | Returns the sequence name for an autoincrement column |
334 | |
335 | =cut |
336 | |
18360aed |
337 | sub get_autoinc_seq { |
338 | my ($self, $source, $col) = @_; |
d4daee7b |
339 | |
373940e1 |
340 | $self->dbh_do('_dbh_get_autoinc_seq', $source, $col); |
18360aed |
341 | } |
342 | |
8f7e044c |
343 | =head2 datetime_parser_type |
344 | |
345 | This sets the proper DateTime::Format module for use with |
346 | L<DBIx::Class::InflateColumn::DateTime>. |
347 | |
9900b569 |
348 | =head2 connect_call_datetime_setup |
d2a3958e |
349 | |
350 | Used as: |
351 | |
9900b569 |
352 | on_connect_call => 'datetime_setup' |
d2a3958e |
353 | |
8384a713 |
354 | In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set the session nls |
355 | date, and timestamp values for use with L<DBIx::Class::InflateColumn::DateTime> |
356 | and the necessary environment variables for L<DateTime::Format::Oracle>, which |
357 | is used by it. |
d2a3958e |
358 | |
82f6f45f |
359 | Maximum allowable precision is used, unless the environment variables have |
360 | already been set. |
d2a3958e |
361 | |
9900b569 |
362 | These are the defaults used: |
363 | |
364 | $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; |
365 | $ENV{NLS_TIMESTAMP_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF'; |
366 | $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; |
367 | |
d9e53b85 |
368 | To get more than second precision with L<DBIx::Class::InflateColumn::DateTime> |
369 | for your timestamps, use something like this: |
370 | |
371 | use Time::HiRes 'time'; |
372 | my $ts = DateTime->from_epoch(epoch => time); |
373 | |
d2a3958e |
374 | =cut |
375 | |
9900b569 |
376 | sub connect_call_datetime_setup { |
d2a3958e |
377 | my $self = shift; |
d2a3958e |
378 | |
379 | my $date_format = $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; |
380 | my $timestamp_format = $ENV{NLS_TIMESTAMP_FORMAT} ||= |
381 | 'YYYY-MM-DD HH24:MI:SS.FF'; |
382 | my $timestamp_tz_format = $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= |
383 | 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; |
384 | |
7a84c41b |
385 | $self->_do_query( |
d7a58a29 |
386 | "alter session set nls_date_format = '$date_format'" |
387 | ); |
7a84c41b |
388 | $self->_do_query( |
d7a58a29 |
389 | "alter session set nls_timestamp_format = '$timestamp_format'" |
390 | ); |
7a84c41b |
391 | $self->_do_query( |
d7a58a29 |
392 | "alter session set nls_timestamp_tz_format='$timestamp_tz_format'" |
393 | ); |
d2a3958e |
394 | } |
395 | |
0e773352 |
396 | ### Note originally by Ron "Quinn" Straight <quinnfazigu@gmail.org> |
397 | ### http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=dbsrgits/DBIx-Class.git;a=commitdiff;h=5db2758de644d53e07cd3e05f0e9037bf40116fc |
398 | # |
399 | # Handle LOB types in Oracle. Under a certain size (4k?), you can get away |
400 | # with the driver assuming your input is the deprecated LONG type if you |
401 | # encode it as a hex string. That ain't gonna fly at larger values, where |
402 | # you'll discover you have to do what this does. |
403 | # |
404 | # This method had to be overridden because we need to set ora_field to the |
405 | # actual column, and that isn't passed to the call (provided by Storage) to |
406 | # bind_attribute_by_data_type. |
407 | # |
408 | # According to L<DBD::Oracle>, the ora_field isn't always necessary, but |
409 | # adding it doesn't hurt, and will save your bacon if you're modifying a |
410 | # table with more than one LOB column. |
411 | # |
412 | sub _dbi_attrs_for_bind { |
413 | my ($self, $ident, $bind) = @_; |
00a28188 |
414 | |
0e773352 |
415 | my $attrs = $self->next::method($ident, $bind); |
416 | |
417 | for my $i (0 .. $#$attrs) { |
418 | if (keys %{$attrs->[$i]||{}} and my $col = $bind->[$i][0]{dbic_colname}) { |
419 | $attrs->[$i]{ora_field} = $col; |
420 | } |
421 | } |
5db2758d |
422 | |
0e773352 |
423 | $attrs; |
424 | } |
5db2758d |
425 | |
0e773352 |
426 | my $dbd_loaded; |
427 | sub bind_attribute_by_data_type { |
428 | my ($self, $dt) = @_; |
429 | |
430 | $dbd_loaded ||= do { |
431 | require DBD::Oracle; |
432 | if ($DBD::Oracle::VERSION eq '1.23') { |
433 | $self->throw_exception( |
434 | "BLOB/CLOB support in DBD::Oracle == 1.23 is broken, use an earlier or later ". |
435 | "version.\n\nSee: https://rt.cpan.org/Public/Bug/Display.html?id=46016\n" |
436 | ); |
437 | } |
438 | 1; |
439 | }; |
5db2758d |
440 | |
0e773352 |
441 | if ($self->_is_lob_type($dt)) { |
442 | return { |
443 | ora_type => $self->_is_text_lob_type($dt) |
d7a58a29 |
444 | ? DBD::Oracle::ORA_CLOB() |
445 | : DBD::Oracle::ORA_BLOB() |
0e773352 |
446 | }; |
d7a58a29 |
447 | } |
5db2758d |
448 | } |
449 | |
00a28188 |
450 | # Handle blob columns in WHERE. |
451 | # |
452 | # For equality comparisons: |
453 | # |
454 | # We split data intended for comparing to a LOB into 2000 character chunks and |
455 | # compare them using dbms_lob.substr on the LOB column. |
456 | # |
457 | # We turn off DBD::Oracle LOB binds for these partial LOB comparisons by passing |
458 | # dbd_attrs => undef, because these are regular varchar2 comparisons and |
459 | # otherwise the query will fail. |
460 | # |
461 | # Since the most common comparison size is likely to be under 4000 characters |
462 | # (TEXT comparisons previously deployed to other RDBMSes) we disable |
463 | # prepare_cached for queries with more than two part comparisons to a LOB |
464 | # column. This is done in _dbh_execute (above) which was previously overridden |
465 | # to gracefully recover from an Oracle error. This is to be careful to not |
466 | # exhaust your application's open cursor limit. |
467 | # |
468 | # See: |
469 | # http://itcareershift.com/blog1/2011/02/21/oracle-max-number-of-open-cursors-complete-reference-for-the-new-oracle-dba/ |
470 | # on the open_cursor limit. |
471 | # |
472 | # For everything else: |
473 | # |
474 | # We assume that everything that is not a LOB comparison, will most likely be a |
475 | # LIKE query or some sort of function invocation. This may prove to be a naive |
476 | # assumption in the future, but for now it should cover the two most likely |
477 | # things users would want to do with a BLOB or CLOB, an equality test or a LIKE |
478 | # query (on a CLOB.) |
479 | # |
480 | # For these expressions, the bind must NOT have the attributes of a LOB bind for |
481 | # DBD::Oracle, otherwise the query will fail. This is done by passing |
482 | # dbd_attrs => undef. |
483 | |
484 | sub _prep_for_execute { |
485 | my $self = shift; |
486 | my ($op) = @_; |
487 | |
488 | my ($sql, $bind) = $self->next::method(@_); |
489 | |
5e782048 |
490 | return ($sql, $bind) if $op eq 'insert'; |
00a28188 |
491 | |
5e782048 |
492 | my $blob_bind_index; |
493 | for (0 .. $#$bind) { |
494 | $blob_bind_index->{$_} = 1 if $self->_is_lob_type( |
495 | $bind->[$_][0]{sqlt_datatype} |
496 | ); |
497 | } |
00a28188 |
498 | |
5e782048 |
499 | return ($sql, $bind) unless $blob_bind_index; |
00a28188 |
500 | |
5e782048 |
501 | my (@sql_parts, $new_sql, @new_binds); |
502 | |
503 | if ($op eq 'select' || $op eq 'delete') { |
504 | @sql_parts = split /\?/, $sql; |
505 | } |
506 | elsif ($op eq 'update') { |
507 | $self->throw_exception('Update with complex WHERE clauses currently not supported') |
508 | if $sql =~ /\bWHERE\b .+ \bWHERE\b/xs; |
509 | |
510 | my ($set_part, $where_part) = $sql =~ /^ (.+?) ( \bWHERE\b .+) /xs; |
511 | |
512 | my $set_bind_count = $set_part =~ y/?//; |
513 | @new_binds = splice @$bind, 0, $set_bind_count; |
514 | |
515 | @sql_parts = split /\?/, $where_part; |
516 | $new_sql = $set_part; |
517 | } |
518 | else { |
519 | $self->throw_exception("Unsupported \$op: $op"); |
520 | } |
521 | |
522 | my $col_equality_re = qr/ (?<=\s) ([\w."]+) (\s*=\s*) $/x; |
523 | |
524 | for my $b_idx (0 .. $#$bind) { |
525 | my $bound = $bind->[$b_idx]; |
526 | |
527 | if ($blob_bind_index->{$b_idx}) { |
528 | if (my ($col, $eq) = $sql_parts[0] =~ $col_equality_re) { |
00a28188 |
529 | my $data = $bound->[1]; |
530 | |
531 | $data = "$data" if ref $data; |
532 | |
533 | my @parts = unpack '(a2000)*', $data; |
534 | |
535 | my @sql_frag; |
536 | |
537 | for my $idx (0..$#parts) { |
5e782048 |
538 | push @sql_frag, sprintf ( |
539 | 'UTL_RAW.CAST_TO_VARCHAR2(RAWTOHEX(DBMS_LOB.SUBSTR(%s, 2000, %d))) = ?', |
540 | $col, ($idx*2000 + 1), |
541 | ); |
00a28188 |
542 | } |
543 | |
544 | my $sql_frag = '( ' . (join ' AND ', @sql_frag) . ' )'; |
545 | |
5e782048 |
546 | $sql_parts[0] =~ s/$col_equality_re/$sql_frag/; |
00a28188 |
547 | |
5e782048 |
548 | $new_sql .= shift @sql_parts; |
00a28188 |
549 | |
550 | for my $idx (0..$#parts) { |
551 | push @new_binds, [ |
552 | { |
553 | %{ $bound->[0] }, |
554 | _ora_lob_autosplit_part => $idx, |
555 | dbd_attrs => undef, |
556 | }, |
557 | $parts[$idx] |
558 | ]; |
559 | } |
560 | } |
561 | else { |
5e782048 |
562 | $new_sql .= shift(@sql_parts) . '?'; |
00a28188 |
563 | |
564 | push @new_binds, [ |
565 | { |
566 | %{ $bound->[0] }, |
567 | dbd_attrs => undef, |
568 | }, |
569 | $bound->[1], |
570 | ]; |
571 | } |
572 | } |
573 | else { |
5e782048 |
574 | $new_sql .= shift(@sql_parts) . '?'; |
00a28188 |
575 | push @new_binds, $bound; |
576 | } |
577 | } |
5e782048 |
578 | |
579 | if (@sql_parts > 1) { |
580 | carp "There are more placeholders than binds, this should not happen!"; |
581 | @sql_parts = join ('?', @sql_parts); |
582 | } |
583 | |
584 | $new_sql .= $sql_parts[0]; |
00a28188 |
585 | |
586 | return ($new_sql, \@new_binds); |
587 | } |
588 | |
589 | # Savepoints stuff. |
590 | |
90d7422f |
591 | sub _exec_svp_begin { |
d7a58a29 |
592 | my ($self, $name) = @_; |
90d7422f |
593 | $self->_dbh->do("SAVEPOINT $name"); |
1816be4f |
594 | } |
595 | |
281719d2 |
596 | # Oracle automatically releases a savepoint when you start another one with the |
597 | # same name. |
90d7422f |
598 | sub _exec_svp_release { 1 } |
281719d2 |
599 | |
90d7422f |
600 | sub _exec_svp_rollback { |
d7a58a29 |
601 | my ($self, $name) = @_; |
90d7422f |
602 | $self->_dbh->do("ROLLBACK TO SAVEPOINT $name") |
281719d2 |
603 | } |
604 | |
6c0230de |
605 | =head2 relname_to_table_alias |
606 | |
607 | L<DBIx::Class> uses L<DBIx::Class::Relationship> names as table aliases in |
608 | queries. |
609 | |
610 | Unfortunately, Oracle doesn't support identifiers over 30 chars in length, so |
af0edca1 |
611 | the L<DBIx::Class::Relationship> name is shortened and appended with half of an |
612 | MD5 hash. |
6c0230de |
613 | |
614 | See L<DBIx::Class::Storage/"relname_to_table_alias">. |
615 | |
616 | =cut |
617 | |
618 | sub relname_to_table_alias { |
619 | my $self = shift; |
620 | my ($relname, $join_count) = @_; |
621 | |
622 | my $alias = $self->next::method(@_); |
623 | |
19c4cc62 |
624 | # we need to shorten here in addition to the shortening in SQLA itself, |
625 | # since the final relnames are a crucial for the join optimizer |
626 | return $self->sql_maker->_shorten_identifier($alias); |
6c0230de |
627 | } |
628 | |
6c0bb6a7 |
629 | =head2 with_deferred_fk_checks |
630 | |
631 | Runs a coderef between: |
632 | |
633 | alter session set constraints = deferred |
634 | ... |
635 | alter session set constraints = immediate |
636 | |
b7b18f32 |
637 | to defer foreign key checks. |
638 | |
639 | Constraints must be declared C<DEFERRABLE> for this to work. |
6c0bb6a7 |
640 | |
641 | =cut |
642 | |
643 | sub with_deferred_fk_checks { |
644 | my ($self, $sub) = @_; |
b7b18f32 |
645 | |
646 | my $txn_scope_guard = $self->txn_scope_guard; |
647 | |
6c0bb6a7 |
648 | $self->_do_query('alter session set constraints = deferred'); |
54161a15 |
649 | |
b7b18f32 |
650 | my $sg = Scope::Guard->new(sub { |
651 | $self->_do_query('alter session set constraints = immediate'); |
652 | }); |
281719d2 |
653 | |
6298a324 |
654 | return |
655 | preserve_context { $sub->() } after => sub { $txn_scope_guard->commit }; |
281719d2 |
656 | } |
657 | |
c0024355 |
658 | =head1 ATTRIBUTES |
659 | |
660 | Following additional attributes can be used in resultsets. |
661 | |
6b2fbbf0 |
662 | =head2 connect_by or connect_by_nocycle |
c0024355 |
663 | |
664 | =over 4 |
665 | |
666 | =item Value: \%connect_by |
667 | |
668 | =back |
669 | |
670 | A hashref of conditions used to specify the relationship between parent rows |
671 | and child rows of the hierarchy. |
672 | |
6b2fbbf0 |
673 | |
c0024355 |
674 | connect_by => { parentid => 'prior personid' } |
675 | |
676 | # adds a connect by statement to the query: |
677 | # SELECT |
678 | # me.persionid me.firstname, me.lastname, me.parentid |
679 | # FROM |
680 | # person me |
681 | # CONNECT BY |
682 | # parentid = prior persionid |
6b2fbbf0 |
683 | |
c0024355 |
684 | |
6b2fbbf0 |
685 | connect_by_nocycle => { parentid => 'prior personid' } |
2ba03b16 |
686 | |
6b2fbbf0 |
687 | # adds a connect by statement to the query: |
688 | # SELECT |
689 | # me.persionid me.firstname, me.lastname, me.parentid |
690 | # FROM |
691 | # person me |
692 | # CONNECT BY NOCYCLE |
693 | # parentid = prior persionid |
2ba03b16 |
694 | |
695 | |
c0024355 |
696 | =head2 start_with |
697 | |
698 | =over 4 |
699 | |
700 | =item Value: \%condition |
701 | |
702 | =back |
703 | |
704 | A hashref of conditions which specify the root row(s) of the hierarchy. |
705 | |
706 | It uses the same syntax as L<DBIx::Class::ResultSet/search> |
707 | |
708 | start_with => { firstname => 'Foo', lastname => 'Bar' } |
709 | |
710 | # SELECT |
711 | # me.persionid me.firstname, me.lastname, me.parentid |
712 | # FROM |
713 | # person me |
714 | # START WITH |
715 | # firstname = 'foo' and lastname = 'bar' |
716 | # CONNECT BY |
717 | # parentid = prior persionid |
718 | |
719 | =head2 order_siblings_by |
720 | |
721 | =over 4 |
722 | |
723 | =item Value: ($order_siblings_by | \@order_siblings_by) |
724 | |
725 | =back |
726 | |
727 | Which column(s) to order the siblings by. |
728 | |
729 | It uses the same syntax as L<DBIx::Class::ResultSet/order_by> |
730 | |
731 | 'order_siblings_by' => 'firstname ASC' |
732 | |
733 | # SELECT |
734 | # me.persionid me.firstname, me.lastname, me.parentid |
735 | # FROM |
736 | # person me |
737 | # CONNECT BY |
738 | # parentid = prior persionid |
739 | # ORDER SIBLINGS BY |
740 | # firstname ASC |
741 | |
7a84c41b |
742 | =head1 AUTHOR |
18360aed |
743 | |
00a28188 |
744 | See L<DBIx::Class/AUTHOR> and L<DBIx::Class/CONTRIBUTORS>. |
18360aed |
745 | |
746 | =head1 LICENSE |
747 | |
748 | You may distribute this code under the same terms as Perl itself. |
749 | |
750 | =cut |
7137528d |
751 | |
752 | 1; |
00a28188 |
753 | # vim:sts=2 sw=2: |