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1 | package DBIx::Class::Storage::DBI::Oracle::Generic; |
2 | |
3 | use strict; |
4 | use warnings; |
b7b18f32 |
5 | use Scope::Guard (); |
6 | use Context::Preserve (); |
ed7ab0f4 |
7 | use Try::Tiny; |
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8 | |
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9 | =head1 NAME |
10 | |
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11 | DBIx::Class::Storage::DBI::Oracle::Generic - Oracle Support for DBIx::Class |
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12 | |
13 | =head1 SYNOPSIS |
14 | |
d88ecca6 |
15 | # In your result (table) classes |
16 | use base 'DBIx::Class::Core'; |
2e46b6eb |
17 | __PACKAGE__->add_columns({ id => { sequence => 'mysequence', auto_nextval => 1 } }); |
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18 | __PACKAGE__->set_primary_key('id'); |
19 | __PACKAGE__->sequence('mysequence'); |
20 | |
21 | =head1 DESCRIPTION |
22 | |
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23 | This class implements base Oracle support. The subclass |
24 | L<DBIx::Class::Storage::DBI::Oracle::WhereJoins> is for C<(+)> joins in Oracle |
25 | versions before 9. |
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26 | |
27 | =head1 METHODS |
28 | |
29 | =cut |
30 | |
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31 | use base qw/DBIx::Class::Storage::DBI/; |
2ad62d97 |
32 | use mro 'c3'; |
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33 | |
dd2600c6 |
34 | sub deployment_statements { |
35 | my $self = shift;; |
36 | my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_; |
37 | |
38 | $sqltargs ||= {}; |
032b2366 |
39 | my $quote_char = $self->schema->storage->sql_maker->quote_char; |
40 | $sqltargs->{quote_table_names} = $quote_char ? 1 : 0; |
41 | $sqltargs->{quote_field_names} = $quote_char ? 1 : 0; |
dd2600c6 |
42 | |
9780718f |
43 | my $oracle_version = try { $self->_get_dbh->get_info(18) }; |
a4433d8e |
44 | |
45 | $sqltargs->{producer_args}{oracle_version} = $oracle_version; |
46 | |
38aead8e |
47 | $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest); |
dd2600c6 |
48 | } |
49 | |
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50 | sub _dbh_last_insert_id { |
2e46b6eb |
51 | my ($self, $dbh, $source, @columns) = @_; |
52 | my @ids = (); |
53 | foreach my $col (@columns) { |
54 | my $seq = ($source->column_info($col)->{sequence} ||= $self->get_autoinc_seq($source,$col)); |
55 | my $id = $self->_sequence_fetch( 'currval', $seq ); |
56 | push @ids, $id; |
57 | } |
58 | return @ids; |
18360aed |
59 | } |
60 | |
61 | sub _dbh_get_autoinc_seq { |
62 | my ($self, $dbh, $source, $col) = @_; |
63 | |
032b2366 |
64 | my $sql_maker = $self->sql_maker; |
cb464582 |
65 | |
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66 | my $source_name; |
032b2366 |
67 | if ( ref $source->name eq 'SCALAR' ) { |
68 | $source_name = ${$source->name}; |
e6dd7b42 |
69 | } |
70 | else { |
032b2366 |
71 | $source_name = $source->name; |
e6dd7b42 |
72 | } |
3963bf4c |
73 | $source_name = uc($source_name) unless $sql_maker->quote_char; |
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74 | |
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75 | # trigger_body is a LONG |
76 | local $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024); |
77 | |
78 | # disable default bindtype |
79 | local $sql_maker->{bindtype} = 'normal'; |
80 | |
81 | # look up the correct sequence automatically |
82 | my ( $schema, $table ) = $source_name =~ /(\w+)\.(\w+)/; |
83 | my ($sql, @bind) = $sql_maker->select ( |
84 | 'ALL_TRIGGERS', |
85 | ['trigger_body'], |
86 | { |
87 | $schema ? (owner => $schema) : (), |
88 | table_name => $table || $source_name, |
cc42fa9a |
89 | triggering_event => { -like => '%INSERT%' }, |
032b2366 |
90 | status => 'ENABLED', |
91 | }, |
92 | ); |
93 | my $sth = $dbh->prepare($sql); |
94 | $sth->execute (@bind); |
e6dd7b42 |
95 | |
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96 | while (my ($insert_trigger) = $sth->fetchrow_array) { |
852a66f6 |
97 | return $1 if $insert_trigger =~ m!("?\w+"?)\.nextval!i; # col name goes here??? |
18360aed |
98 | } |
4f2b3017 |
99 | $self->throw_exception("Unable to find a sequence INSERT trigger on table '$source_name'."); |
18360aed |
100 | } |
101 | |
2e46b6eb |
102 | sub _sequence_fetch { |
103 | my ( $self, $type, $seq ) = @_; |
9ae966b9 |
104 | my ($id) = $self->_get_dbh->selectrow_array("SELECT ${seq}.${type} FROM DUAL"); |
2e46b6eb |
105 | return $id; |
106 | } |
107 | |
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108 | sub _ping { |
c2481821 |
109 | my $self = shift; |
7ba7a57d |
110 | |
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111 | my $dbh = $self->_dbh or return 0; |
7ba7a57d |
112 | |
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113 | local $dbh->{RaiseError} = 1; |
ecdf1ac8 |
114 | local $dbh->{PrintError} = 0; |
c2d7baef |
115 | |
52b420dd |
116 | return try { |
ecdf1ac8 |
117 | $dbh->do('select 1 from dual'); |
52b420dd |
118 | 1; |
ed7ab0f4 |
119 | } catch { |
52b420dd |
120 | 0; |
6dc4be0f |
121 | }; |
c2481821 |
122 | } |
123 | |
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124 | sub _dbh_execute { |
125 | my $self = shift; |
126 | my ($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) = @_; |
127 | |
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128 | my (@res, $tried); |
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129 | my $wantarray = wantarray(); |
4f661051 |
130 | my $next = $self->next::can; |
87560ef9 |
131 | do { |
52b420dd |
132 | try { |
dd415de8 |
133 | my $exec = sub { $self->$next($dbh, $op, $extra_bind, $ident, $bind_attributes, @args) }; |
134 | |
135 | if (!defined $wantarray) { |
136 | $exec->(); |
137 | } |
138 | elsif (! $wantarray) { |
139 | $res[0] = $exec->(); |
140 | } |
141 | else { |
142 | @res = $exec->(); |
143 | } |
87560ef9 |
144 | |
145 | $tried++; |
52b420dd |
146 | } |
147 | catch { |
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148 | if (! $tried and $_ =~ /ORA-01003/) { |
0f0abc97 |
149 | # ORA-01003: no statement parsed (someone changed the table somehow, |
150 | # invalidating your cursor.) |
151 | my ($sql, $bind) = $self->_prep_for_execute($op, $extra_bind, $ident, \@args); |
152 | delete $dbh->{CachedKids}{$sql}; |
d789fa99 |
153 | } |
52b420dd |
154 | else { |
155 | $self->throw_exception($_); |
156 | } |
157 | }; |
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158 | } while (! $tried++); |
dd415de8 |
159 | |
160 | return $wantarray ? @res : $res[0]; |
d789fa99 |
161 | } |
162 | |
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163 | =head2 get_autoinc_seq |
164 | |
165 | Returns the sequence name for an autoincrement column |
166 | |
167 | =cut |
168 | |
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169 | sub get_autoinc_seq { |
170 | my ($self, $source, $col) = @_; |
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171 | |
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172 | $self->dbh_do('_dbh_get_autoinc_seq', $source, $col); |
18360aed |
173 | } |
174 | |
8f7e044c |
175 | =head2 datetime_parser_type |
176 | |
177 | This sets the proper DateTime::Format module for use with |
178 | L<DBIx::Class::InflateColumn::DateTime>. |
179 | |
180 | =cut |
181 | |
182 | sub datetime_parser_type { return "DateTime::Format::Oracle"; } |
183 | |
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184 | =head2 connect_call_datetime_setup |
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185 | |
186 | Used as: |
187 | |
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188 | on_connect_call => 'datetime_setup' |
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189 | |
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190 | In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set the session nls |
191 | date, and timestamp values for use with L<DBIx::Class::InflateColumn::DateTime> |
192 | and the necessary environment variables for L<DateTime::Format::Oracle>, which |
193 | is used by it. |
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194 | |
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195 | Maximum allowable precision is used, unless the environment variables have |
196 | already been set. |
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197 | |
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198 | These are the defaults used: |
199 | |
200 | $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; |
201 | $ENV{NLS_TIMESTAMP_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF'; |
202 | $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; |
203 | |
d9e53b85 |
204 | To get more than second precision with L<DBIx::Class::InflateColumn::DateTime> |
205 | for your timestamps, use something like this: |
206 | |
207 | use Time::HiRes 'time'; |
208 | my $ts = DateTime->from_epoch(epoch => time); |
209 | |
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210 | =cut |
211 | |
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212 | sub connect_call_datetime_setup { |
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213 | my $self = shift; |
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214 | |
215 | my $date_format = $ENV{NLS_DATE_FORMAT} ||= 'YYYY-MM-DD HH24:MI:SS'; |
216 | my $timestamp_format = $ENV{NLS_TIMESTAMP_FORMAT} ||= |
217 | 'YYYY-MM-DD HH24:MI:SS.FF'; |
218 | my $timestamp_tz_format = $ENV{NLS_TIMESTAMP_TZ_FORMAT} ||= |
219 | 'YYYY-MM-DD HH24:MI:SS.FF TZHTZM'; |
220 | |
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221 | $self->_do_query( |
d7a58a29 |
222 | "alter session set nls_date_format = '$date_format'" |
223 | ); |
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224 | $self->_do_query( |
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225 | "alter session set nls_timestamp_format = '$timestamp_format'" |
226 | ); |
227 | $self->_do_query( |
228 | "alter session set nls_timestamp_tz_format='$timestamp_tz_format'" |
229 | ); |
d2a3958e |
230 | } |
231 | |
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232 | =head2 source_bind_attributes |
233 | |
234 | Handle LOB types in Oracle. Under a certain size (4k?), you can get away |
235 | with the driver assuming your input is the deprecated LONG type if you |
236 | encode it as a hex string. That ain't gonna fly at larger values, where |
237 | you'll discover you have to do what this does. |
238 | |
239 | This method had to be overridden because we need to set ora_field to the |
240 | actual column, and that isn't passed to the call (provided by Storage) to |
241 | bind_attribute_by_data_type. |
242 | |
243 | According to L<DBD::Oracle>, the ora_field isn't always necessary, but |
244 | adding it doesn't hurt, and will save your bacon if you're modifying a |
245 | table with more than one LOB column. |
246 | |
247 | =cut |
248 | |
e6dd7b42 |
249 | sub source_bind_attributes |
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250 | { |
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251 | require DBD::Oracle; |
252 | my $self = shift; |
253 | my($source) = @_; |
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254 | |
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255 | my %bind_attributes; |
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256 | |
d7a58a29 |
257 | foreach my $column ($source->columns) { |
258 | my $data_type = $source->column_info($column)->{data_type} || ''; |
259 | next unless $data_type; |
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260 | |
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261 | my %column_bind_attrs = $self->bind_attribute_by_data_type($data_type); |
5db2758d |
262 | |
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263 | if ($data_type =~ /^[BC]LOB$/i) { |
931e5d43 |
264 | if ($DBD::Oracle::VERSION eq '1.23') { |
265 | $self->throw_exception( |
266 | "BLOB/CLOB support in DBD::Oracle == 1.23 is broken, use an earlier or later ". |
555cc3f4 |
267 | "version.\n\nSee: https://rt.cpan.org/Public/Bug/Display.html?id=46016\n" |
931e5d43 |
268 | ); |
269 | } |
270 | |
d7a58a29 |
271 | $column_bind_attrs{'ora_type'} = uc($data_type) eq 'CLOB' |
272 | ? DBD::Oracle::ORA_CLOB() |
273 | : DBD::Oracle::ORA_BLOB() |
274 | ; |
275 | $column_bind_attrs{'ora_field'} = $column; |
276 | } |
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277 | |
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278 | $bind_attributes{$column} = \%column_bind_attrs; |
279 | } |
5db2758d |
280 | |
d7a58a29 |
281 | return \%bind_attributes; |
5db2758d |
282 | } |
283 | |
1816be4f |
284 | sub _svp_begin { |
d7a58a29 |
285 | my ($self, $name) = @_; |
286 | $self->_get_dbh->do("SAVEPOINT $name"); |
1816be4f |
287 | } |
288 | |
281719d2 |
289 | # Oracle automatically releases a savepoint when you start another one with the |
290 | # same name. |
291 | sub _svp_release { 1 } |
292 | |
293 | sub _svp_rollback { |
d7a58a29 |
294 | my ($self, $name) = @_; |
295 | $self->_get_dbh->do("ROLLBACK TO SAVEPOINT $name") |
281719d2 |
296 | } |
297 | |
6c0230de |
298 | =head2 relname_to_table_alias |
299 | |
300 | L<DBIx::Class> uses L<DBIx::Class::Relationship> names as table aliases in |
301 | queries. |
302 | |
303 | Unfortunately, Oracle doesn't support identifiers over 30 chars in length, so |
af0edca1 |
304 | the L<DBIx::Class::Relationship> name is shortened and appended with half of an |
305 | MD5 hash. |
6c0230de |
306 | |
307 | See L<DBIx::Class::Storage/"relname_to_table_alias">. |
308 | |
309 | =cut |
310 | |
311 | sub relname_to_table_alias { |
312 | my $self = shift; |
313 | my ($relname, $join_count) = @_; |
314 | |
315 | my $alias = $self->next::method(@_); |
316 | |
317 | return $alias if length($alias) <= 30; |
318 | |
af0edca1 |
319 | # get a base64 md5 of the alias with join_count |
320 | require Digest::MD5; |
321 | my $ctx = Digest::MD5->new; |
322 | $ctx->add($alias); |
323 | my $md5 = $ctx->b64digest; |
6c0230de |
324 | |
f098ade6 |
325 | # remove alignment mark just in case |
326 | $md5 =~ s/=*\z//; |
327 | |
af0edca1 |
328 | # truncate and prepend to truncated relname without vowels |
329 | (my $devoweled = $relname) =~ s/[aeiou]//g; |
909668fe |
330 | my $shortened = substr($devoweled, 0, 18); |
6c0230de |
331 | |
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332 | my $new_alias = |
333 | $shortened . '_' . substr($md5, 0, 30 - length($shortened) - 1); |
334 | |
335 | return $new_alias; |
6c0230de |
336 | } |
337 | |
6c0bb6a7 |
338 | =head2 with_deferred_fk_checks |
339 | |
340 | Runs a coderef between: |
341 | |
342 | alter session set constraints = deferred |
343 | ... |
344 | alter session set constraints = immediate |
345 | |
b7b18f32 |
346 | to defer foreign key checks. |
347 | |
348 | Constraints must be declared C<DEFERRABLE> for this to work. |
6c0bb6a7 |
349 | |
350 | =cut |
351 | |
352 | sub with_deferred_fk_checks { |
353 | my ($self, $sub) = @_; |
b7b18f32 |
354 | |
355 | my $txn_scope_guard = $self->txn_scope_guard; |
356 | |
6c0bb6a7 |
357 | $self->_do_query('alter session set constraints = deferred'); |
b7b18f32 |
358 | |
359 | my $sg = Scope::Guard->new(sub { |
360 | $self->_do_query('alter session set constraints = immediate'); |
361 | }); |
362 | |
363 | return Context::Preserve::preserve_context(sub { $sub->() }, |
364 | after => sub { $txn_scope_guard->commit }); |
6c0bb6a7 |
365 | } |
366 | |
7a84c41b |
367 | =head1 AUTHOR |
18360aed |
368 | |
7a84c41b |
369 | See L<DBIx::Class/CONTRIBUTORS>. |
18360aed |
370 | |
371 | =head1 LICENSE |
372 | |
373 | You may distribute this code under the same terms as Perl itself. |
374 | |
375 | =cut |
7137528d |
376 | |
377 | 1; |