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1 | package DBIx::Class::Storage::DBI::InterBase; |
2 | |
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3 | # partly stolen from DBIx::Class::Storage::DBI::MSSQL |
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4 | |
5 | use strict; |
6 | use warnings; |
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7 | use base qw/DBIx::Class::Storage::DBI/; |
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8 | use mro 'c3'; |
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9 | use List::Util(); |
10 | |
11 | __PACKAGE__->mk_group_accessors(simple => qw/ |
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12 | _auto_incs |
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13 | /); |
14 | |
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15 | =head1 NAME |
16 | |
17 | DBIx::Class::Storage::DBI::InterBase - Driver for the Firebird RDBMS |
18 | |
19 | =head1 DESCRIPTION |
20 | |
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21 | This class implements autoincrements for Firebird using C<RETURNING> as well as |
22 | L<auto_nextval|DBIx::Class::ResultSource/auto_nextval> sets the limit dialect to |
23 | C<FIRST X SKIP X> and provides L<DBIx::Class::InflateColumn::DateTime> support. |
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24 | |
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25 | You need to use either the |
26 | L<disable_sth_caching|DBIx::Class::Storage::DBI/disable_sth_caching> option or |
27 | L</connect_call_use_softcommit> (see L</CAVEATS>) for your code to function |
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28 | correctly with this driver. Otherwise you will likely get bizarre error messages |
29 | such as C<no statement executing>. |
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30 | |
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31 | For ODBC support, see L<DBIx::Class::Storage::DBI::ODBC::Firebird>. |
32 | |
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33 | To turn on L<DBIx::Class::InflateColumn::DateTime> support, see |
34 | L</connect_call_datetime_setup>. |
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35 | |
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36 | =cut |
37 | |
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38 | sub _prep_for_execute { |
39 | my $self = shift; |
40 | my ($op, $extra_bind, $ident, $args) = @_; |
41 | |
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42 | if ($op eq 'insert') { |
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43 | $self->_auto_incs([]); |
44 | |
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45 | @pk{$ident->primary_columns} = (); |
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46 | |
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47 | my @auto_inc_cols = grep { |
48 | my $inserting = $args->[0]{$_}; |
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49 | |
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50 | ($ident->column_info($_)->{is_auto_increment} |
51 | || exists $pk{$_}) |
52 | && ( |
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53 | (not defined $inserting) |
54 | || |
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55 | (ref $inserting eq 'SCALAR' && $$inserting =~ /^null\z/i) |
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56 | ) |
57 | } $ident->columns; |
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58 | |
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59 | if (@auto_inc_cols) { |
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60 | $args->[1]{returning} = \@auto_inc_cols; |
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61 | |
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62 | $self->_auto_incs->[0] = \@auto_inc_cols; |
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63 | } |
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64 | } |
65 | |
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66 | return $self->next::method(@_); |
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67 | } |
68 | |
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69 | sub _execute { |
70 | my $self = shift; |
71 | my ($op) = @_; |
72 | |
73 | my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_); |
74 | |
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75 | if ($op eq 'insert' && $self->_auto_incs) { |
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76 | local $@; |
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77 | my (@auto_incs) = eval { |
78 | local $SIG{__WARN__} = sub {}; |
79 | $sth->fetchrow_array |
80 | }; |
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81 | $self->_auto_incs->[1] = \@auto_incs; |
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82 | $sth->finish; |
83 | } |
84 | |
85 | return wantarray ? ($rv, $sth, @bind) : $rv; |
86 | } |
87 | |
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88 | sub _sequence_fetch { |
89 | my ($self, $nextval, $sequence) = @_; |
90 | |
91 | if ($nextval ne 'nextval') { |
92 | $self->throw_exception("Can only fetch 'nextval' for a sequence"); |
93 | } |
94 | |
95 | $self->throw_exception('No sequence to fetch') unless $sequence; |
96 | |
97 | my ($val) = $self->_get_dbh->selectrow_array( |
98 | 'SELECT GEN_ID(' . $self->sql_maker->_quote($sequence) . |
99 | ', 1) FROM rdb$database'); |
100 | |
101 | return $val; |
102 | } |
103 | |
104 | sub _dbh_get_autoinc_seq { |
105 | my ($self, $dbh, $source, $col) = @_; |
106 | |
107 | my $table_name = $source->from; |
108 | $table_name = $$table_name if ref $table_name; |
109 | $table_name = $self->sql_maker->quote_char ? $table_name : uc($table_name); |
110 | |
111 | local $dbh->{LongReadLen} = 100000; |
112 | local $dbh->{LongTruncOk} = 1; |
113 | |
114 | my $sth = $dbh->prepare(<<'EOF'); |
115 | SELECT t.rdb$trigger_source |
116 | FROM rdb$triggers t |
117 | WHERE t.rdb$relation_name = ? |
118 | AND t.rdb$system_flag = 0 -- user defined |
119 | AND t.rdb$trigger_type = 1 -- BEFORE INSERT |
120 | EOF |
121 | $sth->execute($table_name); |
122 | |
123 | while (my ($trigger) = $sth->fetchrow_array) { |
124 | my @trig_cols = map { |
125 | /^"([^"]+)/ ? $1 : uc($1) |
126 | } $trigger =~ /new\.("?\w+"?)/ig; |
127 | |
128 | my ($quoted, $generator) = $trigger =~ |
129 | /(?:gen_id\s* \( \s* |next \s* value \s* for \s*)(")?(\w+)/ix; |
130 | |
131 | if ($generator) { |
132 | $generator = uc $generator unless $quoted; |
133 | |
134 | return $generator |
135 | if List::Util::first { |
136 | $self->sql_maker->quote_char ? ($_ eq $col) : (uc($_) eq uc($col)) |
137 | } @trig_cols; |
138 | } |
139 | } |
140 | |
141 | return undef; |
142 | } |
143 | |
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144 | sub last_insert_id { |
145 | my ($self, $source, @cols) = @_; |
146 | my @result; |
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147 | |
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148 | my %auto_incs; |
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149 | @auto_incs{ @{ $self->_auto_incs->[0] } } = |
150 | @{ $self->_auto_incs->[1] }; |
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151 | |
152 | push @result, $auto_incs{$_} for @cols; |
153 | |
154 | return @result; |
155 | } |
156 | |
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157 | sub insert { |
158 | my $self = shift; |
159 | |
160 | my $updated_cols = $self->next::method(@_); |
161 | |
162 | if ($self->_auto_incs->[0]) { |
163 | my %auto_incs; |
164 | @auto_incs{ @{ $self->_auto_incs->[0] } } = @{ $self->_auto_incs->[1] }; |
165 | |
166 | $updated_cols = { %$updated_cols, %auto_incs }; |
167 | } |
168 | |
169 | return $updated_cols; |
170 | } |
171 | |
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172 | # this sub stolen from DB2 |
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173 | |
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174 | sub _sql_maker_opts { |
175 | my ( $self, $opts ) = @_; |
176 | |
177 | if ( $opts ) { |
178 | $self->{_sql_maker_opts} = { %$opts }; |
179 | } |
180 | |
181 | return { limit_dialect => 'FirstSkip', %{$self->{_sql_maker_opts}||{}} }; |
182 | } |
183 | |
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184 | sub _svp_begin { |
185 | my ($self, $name) = @_; |
186 | |
187 | $self->_get_dbh->do("SAVEPOINT $name"); |
188 | } |
189 | |
190 | sub _svp_release { |
191 | my ($self, $name) = @_; |
192 | |
193 | $self->_get_dbh->do("RELEASE SAVEPOINT $name"); |
194 | } |
195 | |
196 | sub _svp_rollback { |
197 | my ($self, $name) = @_; |
198 | |
199 | $self->_get_dbh->do("ROLLBACK TO SAVEPOINT $name") |
200 | } |
201 | |
202 | sub _ping { |
203 | my $self = shift; |
204 | |
205 | my $dbh = $self->_dbh or return 0; |
206 | |
207 | local $dbh->{RaiseError} = 1; |
208 | |
209 | eval { |
210 | $dbh->do('select 1 from rdb$database'); |
211 | }; |
212 | |
213 | return $@ ? 0 : 1; |
214 | } |
215 | |
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216 | # We want dialect 3 for new features and quoting to work, DBD::InterBase uses |
217 | # dialect 1 (interbase compat) by default. |
218 | sub _init { |
219 | my $self = shift; |
220 | $self->_set_sql_dialect(3); |
221 | } |
222 | |
223 | sub _set_sql_dialect { |
224 | my $self = shift; |
225 | my $val = shift || 3; |
226 | |
227 | my $dsn = $self->_dbi_connect_info->[0]; |
228 | |
229 | return if ref($dsn) eq 'CODE'; |
230 | |
231 | if ($dsn !~ /ib_dialect=/) { |
232 | $self->_dbi_connect_info->[0] = "$dsn;ib_dialect=$val"; |
233 | my $connected = defined $self->_dbh; |
234 | $self->disconnect; |
235 | $self->ensure_connected if $connected; |
236 | } |
237 | } |
238 | |
dd2109ee |
239 | =head2 connect_call_use_softcommit |
240 | |
241 | Used as: |
242 | |
243 | on_connect_call => 'use_softcommit' |
244 | |
245 | In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set the |
246 | L<DBD::InterBase> C<ib_softcommit> option. |
247 | |
248 | You need either this option or C<< disable_sth_caching => 1 >> for |
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249 | L<DBIx::Class> code to function correctly (otherwise you may get C<no statement |
250 | executing> errors.) |
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251 | |
252 | The downside of using this option is that your process will B<NOT> see UPDATEs, |
253 | INSERTs and DELETEs from other processes for already open statements. |
254 | |
255 | =cut |
256 | |
257 | sub connect_call_use_softcommit { |
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258 | my $self = shift; |
259 | |
260 | $self->_dbh->{ib_softcommit} = 1; |
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261 | } |
262 | |
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263 | =head2 connect_call_datetime_setup |
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264 | |
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265 | Used as: |
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266 | |
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267 | on_connect_call => 'datetime_setup' |
268 | |
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269 | In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set the date and |
270 | timestamp formats using: |
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271 | |
272 | $dbh->{ib_time_all} = 'ISO'; |
273 | |
274 | See L<DBD::InterBase> for more details. |
275 | |
276 | The C<TIMESTAMP> data type supports up to 4 digits after the decimal point for |
277 | second precision. The full precision is used. |
278 | |
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279 | The C<DATE> data type stores the date portion only, and it B<MUST> be declared |
280 | with: |
281 | |
282 | data_type => 'date' |
283 | |
284 | in your Result class. |
285 | |
286 | Timestamp columns can be declared with either C<datetime> or C<timestamp>. |
287 | |
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288 | You will need the L<DateTime::Format::Strptime> module for inflation to work. |
289 | |
290 | For L<DBIx::Class::Storage::DBI::ODBC::Firebird>, this is a noop and sub-second |
291 | precision is not currently available. |
292 | |
293 | =cut |
294 | |
295 | sub connect_call_datetime_setup { |
296 | my $self = shift; |
297 | |
298 | $self->_get_dbh->{ib_time_all} = 'ISO'; |
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299 | } |
300 | |
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301 | sub datetime_parser_type { |
302 | 'DBIx::Class::Storage::DBI::InterBase::DateTime::Format' |
303 | } |
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304 | |
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305 | package # hide from PAUSE |
306 | DBIx::Class::Storage::DBI::InterBase::DateTime::Format; |
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307 | |
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308 | my $timestamp_format = '%Y-%m-%d %H:%M:%S.%4N'; # %F %T |
309 | my $date_format = '%Y-%m-%d'; |
310 | |
311 | my ($timestamp_parser, $date_parser); |
312 | |
313 | sub parse_datetime { |
314 | shift; |
315 | require DateTime::Format::Strptime; |
316 | $timestamp_parser ||= DateTime::Format::Strptime->new( |
317 | pattern => $timestamp_format, |
318 | on_error => 'croak', |
319 | ); |
320 | return $timestamp_parser->parse_datetime(shift); |
321 | } |
322 | |
323 | sub format_datetime { |
324 | shift; |
325 | require DateTime::Format::Strptime; |
326 | $timestamp_parser ||= DateTime::Format::Strptime->new( |
327 | pattern => $timestamp_format, |
328 | on_error => 'croak', |
329 | ); |
330 | return $timestamp_parser->format_datetime(shift); |
331 | } |
332 | |
333 | sub parse_date { |
334 | shift; |
335 | require DateTime::Format::Strptime; |
336 | $date_parser ||= DateTime::Format::Strptime->new( |
337 | pattern => $date_format, |
338 | on_error => 'croak', |
339 | ); |
340 | return $date_parser->parse_datetime(shift); |
341 | } |
342 | |
343 | sub format_date { |
344 | shift; |
345 | require DateTime::Format::Strptime; |
346 | $date_parser ||= DateTime::Format::Strptime->new( |
347 | pattern => $date_format, |
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348 | on_error => 'croak', |
349 | ); |
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350 | return $date_parser->format_datetime(shift); |
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351 | } |
352 | |
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353 | 1; |
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354 | |
355 | =head1 CAVEATS |
356 | |
357 | =over 4 |
358 | |
359 | =item * |
360 | |
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361 | with L</connect_call_use_softcommit>, you will not be able to see changes made |
362 | to data in other processes. If this is an issue, use |
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363 | L<disable_sth_caching|DBIx::Class::Storage::DBI/disable_sth_caching> as a |
364 | workaround for the C<no statement executing> errors, this of course adversely |
365 | affects performance. |
dd2109ee |
366 | |
367 | =item * |
368 | |
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369 | C<last_insert_id> support by default only works for Firebird versions 2 or |
370 | greater, L<auto_nextval|DBIx::Class::ResultSource/auto_nextval> however should |
371 | work with earlier versions. |
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372 | |
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373 | =item * |
374 | |
375 | Sub-second precision for TIMESTAMPs is not currently available with ODBC. |
376 | |
90489c23 |
377 | =back |
378 | |
379 | =head1 AUTHOR |
380 | |
381 | See L<DBIx::Class/AUTHOR> and L<DBIx::Class/CONTRIBUTORS>. |
382 | |
383 | =head1 LICENSE |
384 | |
385 | You may distribute this code under the same terms as Perl itself. |
386 | |
387 | =cut |