Commit | Line | Data |
89c0a5a2 |
1 | package DBIx::Class::ResultSet; |
2 | |
3 | use strict; |
4 | use warnings; |
aa562407 |
5 | use Carp qw/croak/; |
89c0a5a2 |
6 | use overload |
7 | '0+' => 'count', |
a910dc57 |
8 | 'bool' => sub { 1; }, |
89c0a5a2 |
9 | fallback => 1; |
3c5b25c5 |
10 | use Data::Page; |
ea20d0fd |
11 | use Storable; |
89c0a5a2 |
12 | |
ee38fa40 |
13 | =head1 NAME |
14 | |
bfab575a |
15 | DBIx::Class::ResultSet - Responsible for fetching and creating resultset. |
ee38fa40 |
16 | |
bfab575a |
17 | =head1 SYNOPSIS |
ee38fa40 |
18 | |
bfab575a |
19 | my $rs = MyApp::DB::Class->search(registered => 1); |
20 | my @rows = MyApp::DB::Class->search(foo => 'bar'); |
ee38fa40 |
21 | |
22 | =head1 DESCRIPTION |
23 | |
bfab575a |
24 | The resultset is also known as an iterator. It is responsible for handling |
25 | queries that may return an arbitrary number of rows, e.g. via C<search> |
26 | or a C<has_many> relationship. |
ee38fa40 |
27 | |
28 | =head1 METHODS |
29 | |
976f3686 |
30 | =head2 new($source, \%$attrs) |
ee38fa40 |
31 | |
976f3686 |
32 | The resultset constructor. Takes a source object (usually a DBIx::Class::Table) |
33 | and an attribute hash (see below for more information on attributes). Does |
34 | not perform any queries -- these are executed as needed by the other methods. |
ee38fa40 |
35 | |
36 | =cut |
37 | |
89c0a5a2 |
38 | sub new { |
fea3d045 |
39 | my $class = shift; |
f9db5527 |
40 | return $class->new_result(@_) if ref $class; |
fea3d045 |
41 | my ($source, $attrs) = @_; |
b98e75f6 |
42 | #use Data::Dumper; warn Dumper($attrs); |
ea20d0fd |
43 | $attrs = Storable::dclone($attrs || {}); # { %{ $attrs || {} } }; |
c7ce65e6 |
44 | my %seen; |
6aeb9185 |
45 | my $alias = ($attrs->{alias} ||= 'me'); |
a9433341 |
46 | if ($attrs->{cols} || !$attrs->{select}) { |
47 | delete $attrs->{as} if $attrs->{cols}; |
976f3686 |
48 | my @cols = ($attrs->{cols} |
49 | ? @{delete $attrs->{cols}} |
a9433341 |
50 | : $source->columns); |
6aeb9185 |
51 | $attrs->{select} = [ map { m/\./ ? $_ : "${alias}.$_" } @cols ]; |
976f3686 |
52 | } |
6aeb9185 |
53 | $attrs->{as} ||= [ map { m/^$alias\.(.*)$/ ? $1 : $_ } @{$attrs->{select}} ]; |
976f3686 |
54 | #use Data::Dumper; warn Dumper(@{$attrs}{qw/select as/}); |
fea3d045 |
55 | $attrs->{from} ||= [ { $alias => $source->from } ]; |
b52e9bf8 |
56 | if (my $join = delete $attrs->{join}) { |
57 | foreach my $j (ref $join eq 'ARRAY' |
58 | ? (@{$join}) : ($join)) { |
c7ce65e6 |
59 | if (ref $j eq 'HASH') { |
60 | $seen{$_} = 1 foreach keys %$j; |
61 | } else { |
62 | $seen{$j} = 1; |
63 | } |
64 | } |
8452e496 |
65 | push(@{$attrs->{from}}, $source->resolve_join($join, $attrs->{alias})); |
c7ce65e6 |
66 | } |
54540863 |
67 | $attrs->{group_by} ||= $attrs->{select} if delete $attrs->{distinct}; |
b52e9bf8 |
68 | foreach my $pre (@{delete $attrs->{prefetch} || []}) { |
8452e496 |
69 | push(@{$attrs->{from}}, $source->resolve_join($pre, $attrs->{alias})) |
c7ce65e6 |
70 | unless $seen{$pre}; |
976f3686 |
71 | my @pre = |
c7ce65e6 |
72 | map { "$pre.$_" } |
f9db5527 |
73 | $source->related_source($pre)->columns; |
976f3686 |
74 | push(@{$attrs->{select}}, @pre); |
75 | push(@{$attrs->{as}}, @pre); |
fef5d100 |
76 | } |
6aeb9185 |
77 | if ($attrs->{page}) { |
78 | $attrs->{rows} ||= 10; |
79 | $attrs->{offset} ||= 0; |
80 | $attrs->{offset} += ($attrs->{rows} * ($attrs->{page} - 1)); |
81 | } |
89c0a5a2 |
82 | my $new = { |
cda04c3a |
83 | source => $source, |
89c0a5a2 |
84 | cond => $attrs->{where}, |
0a3c5b43 |
85 | from => $attrs->{from}, |
3c5b25c5 |
86 | count => undef, |
93b004d3 |
87 | page => delete $attrs->{page}, |
3c5b25c5 |
88 | pager => undef, |
89c0a5a2 |
89 | attrs => $attrs }; |
2f5911b2 |
90 | bless ($new, $class); |
9229f20a |
91 | return $new; |
89c0a5a2 |
92 | } |
93 | |
bfab575a |
94 | =head2 search |
0a3c5b43 |
95 | |
6009260a |
96 | my @obj = $rs->search({ foo => 3 }); # "... WHERE foo = 3" |
97 | my $new_rs = $rs->search({ foo => 3 }); |
98 | |
99 | If you need to pass in additional attributes but no additional condition, |
100 | call it as ->search(undef, \%attrs); |
101 | |
102 | my @all = $class->search({}, { cols => [qw/foo bar/] }); # "SELECT foo, bar FROM $class_table" |
0a3c5b43 |
103 | |
104 | =cut |
105 | |
106 | sub search { |
107 | my $self = shift; |
108 | |
6009260a |
109 | #use Data::Dumper;warn Dumper(@_); |
110 | |
0a3c5b43 |
111 | my $attrs = { %{$self->{attrs}} }; |
112 | if (@_ > 1 && ref $_[$#_] eq 'HASH') { |
6aeb9185 |
113 | $attrs = { %$attrs, %{ pop(@_) } }; |
0a3c5b43 |
114 | } |
115 | |
6aeb9185 |
116 | my $where = (@_ ? ((@_ == 1 || ref $_[0] eq "HASH") ? shift : {@_}) : undef()); |
0a3c5b43 |
117 | if (defined $where) { |
118 | $where = (defined $attrs->{where} |
ad3d2d7c |
119 | ? { '-and' => |
120 | [ map { ref $_ eq 'ARRAY' ? [ -or => $_ ] : $_ } |
121 | $where, $attrs->{where} ] } |
0a3c5b43 |
122 | : $where); |
123 | $attrs->{where} = $where; |
124 | } |
125 | |
fea3d045 |
126 | my $rs = (ref $self)->new($self->{source}, $attrs); |
0a3c5b43 |
127 | |
128 | return (wantarray ? $rs->all : $rs); |
129 | } |
130 | |
bfab575a |
131 | =head2 search_literal |
6009260a |
132 | my @obj = $rs->search_literal($literal_where_cond, @bind); |
133 | my $new_rs = $rs->search_literal($literal_where_cond, @bind); |
134 | |
135 | Pass a literal chunk of SQL to be added to the conditional part of the |
136 | resultset |
137 | |
bfab575a |
138 | =cut |
139 | |
6009260a |
140 | sub search_literal { |
141 | my ($self, $cond, @vals) = @_; |
142 | my $attrs = (ref $vals[$#vals] eq 'HASH' ? { %{ pop(@vals) } } : {}); |
143 | $attrs->{bind} = [ @{$self->{attrs}{bind}||[]}, @vals ]; |
144 | return $self->search(\$cond, $attrs); |
145 | } |
0a3c5b43 |
146 | |
716b3d29 |
147 | =head2 find(@colvalues), find(\%cols) |
148 | |
149 | Finds a row based on its primary key(s). |
150 | |
151 | =cut |
152 | |
153 | sub find { |
154 | my ($self, @vals) = @_; |
155 | my $attrs = (@vals > 1 && ref $vals[$#vals] eq 'HASH' ? pop(@vals) : {}); |
156 | my @pk = $self->{source}->primary_columns; |
157 | #use Data::Dumper; warn Dumper($attrs, @vals, @pk); |
158 | $self->{source}->result_class->throw( "Can't find unless primary columns are defined" ) |
159 | unless @pk; |
160 | my $query; |
161 | if (ref $vals[0] eq 'HASH') { |
162 | $query = $vals[0]; |
163 | } elsif (@pk == @vals) { |
164 | $query = {}; |
165 | @{$query}{@pk} = @vals; |
166 | } else { |
167 | $query = {@vals}; |
168 | } |
169 | #warn Dumper($query); |
170 | # Useless -> disabled |
171 | #$self->{source}->result_class->throw( "Can't find unless all primary keys are specified" ) |
172 | # unless (keys %$query >= @pk); # If we check 'em we run afoul of uc/lc |
173 | # column names etc. Not sure what to do yet |
174 | return $self->search($query)->next; |
175 | } |
176 | |
b52e9bf8 |
177 | =head2 search_related |
178 | |
179 | $rs->search_related('relname', $cond?, $attrs?); |
180 | |
181 | =cut |
182 | |
6aeb9185 |
183 | sub search_related { |
184 | my ($self, $rel, @rest) = @_; |
f9db5527 |
185 | my $rel_obj = $self->{source}->relationship_info($rel); |
6aeb9185 |
186 | $self->{source}->result_class->throw( |
187 | "No such relationship ${rel} in search_related") |
188 | unless $rel_obj; |
6aeb9185 |
189 | my $rs = $self->search(undef, { join => $rel }); |
ea20d0fd |
190 | return $self->{source}->schema->resultset($rel_obj->{class} |
191 | )->search( undef, |
192 | { %{$rs->{attrs}}, |
193 | alias => $rel, |
194 | select => undef(), |
195 | as => undef() } |
6aeb9185 |
196 | )->search(@rest); |
197 | } |
b52e9bf8 |
198 | |
bfab575a |
199 | =head2 cursor |
ee38fa40 |
200 | |
bfab575a |
201 | Returns a storage-driven cursor to the given resultset. |
ee38fa40 |
202 | |
203 | =cut |
204 | |
73f58123 |
205 | sub cursor { |
206 | my ($self) = @_; |
2f5911b2 |
207 | my ($source, $attrs) = @{$self}{qw/source attrs/}; |
6aeb9185 |
208 | $attrs = { %$attrs }; |
73f58123 |
209 | return $self->{cursor} |
976f3686 |
210 | ||= $source->storage->select($self->{from}, $attrs->{select}, |
73f58123 |
211 | $attrs->{where},$attrs); |
212 | } |
213 | |
bfab575a |
214 | =head2 search_like |
58a4bd18 |
215 | |
216 | Identical to search except defaults to 'LIKE' instead of '=' in condition |
217 | |
218 | =cut |
219 | |
220 | sub search_like { |
221 | my $class = shift; |
222 | my $attrs = { }; |
223 | if (@_ > 1 && ref $_[$#_] eq 'HASH') { |
224 | $attrs = pop(@_); |
225 | } |
226 | my $query = ref $_[0] eq "HASH" ? { %{shift()} }: {@_}; |
227 | $query->{$_} = { 'like' => $query->{$_} } for keys %$query; |
228 | return $class->search($query, { %$attrs }); |
229 | } |
230 | |
bfab575a |
231 | =head2 slice($first, $last) |
ee38fa40 |
232 | |
bfab575a |
233 | Returns a subset of elements from the resultset. |
ee38fa40 |
234 | |
235 | =cut |
236 | |
89c0a5a2 |
237 | sub slice { |
238 | my ($self, $min, $max) = @_; |
239 | my $attrs = { %{ $self->{attrs} || {} } }; |
6aeb9185 |
240 | $attrs->{offset} ||= 0; |
241 | $attrs->{offset} += $min; |
89c0a5a2 |
242 | $attrs->{rows} = ($max ? ($max - $min + 1) : 1); |
fea3d045 |
243 | my $slice = (ref $self)->new($self->{source}, $attrs); |
89c0a5a2 |
244 | return (wantarray ? $slice->all : $slice); |
245 | } |
246 | |
bfab575a |
247 | =head2 next |
ee38fa40 |
248 | |
bfab575a |
249 | Returns the next element in the resultset (undef is there is none). |
ee38fa40 |
250 | |
251 | =cut |
252 | |
89c0a5a2 |
253 | sub next { |
254 | my ($self) = @_; |
73f58123 |
255 | my @row = $self->cursor->next; |
a953d8d9 |
256 | # warn Dumper(\@row); use Data::Dumper; |
89c0a5a2 |
257 | return unless (@row); |
c7ce65e6 |
258 | return $self->_construct_object(@row); |
259 | } |
260 | |
261 | sub _construct_object { |
262 | my ($self, @row) = @_; |
976f3686 |
263 | my @cols = @{ $self->{attrs}{as} }; |
264 | #warn "@cols -> @row"; |
b52e9bf8 |
265 | my (%me, %pre); |
266 | foreach my $col (@cols) { |
267 | if ($col =~ /([^\.]+)\.([^\.]+)/) { |
6aeb9185 |
268 | $pre{$1}[0]{$2} = shift @row; |
b52e9bf8 |
269 | } else { |
270 | $me{$col} = shift @row; |
c7ce65e6 |
271 | } |
c7ce65e6 |
272 | } |
c01ab172 |
273 | my $new = $self->{source}->result_class->inflate_result( |
274 | $self->{source}, \%me, \%pre); |
33ce49d6 |
275 | $new = $self->{attrs}{record_filter}->($new) |
276 | if exists $self->{attrs}{record_filter}; |
277 | return $new; |
89c0a5a2 |
278 | } |
279 | |
bfab575a |
280 | =head2 count |
ee38fa40 |
281 | |
bfab575a |
282 | Performs an SQL C<COUNT> with the same query as the resultset was built |
6009260a |
283 | with to find the number of elements. If passed arguments, does a search |
284 | on the resultset and counts the results of that. |
ee38fa40 |
285 | |
286 | =cut |
287 | |
89c0a5a2 |
288 | sub count { |
6009260a |
289 | my $self = shift; |
290 | return $self->search(@_)->count if @_ && defined $_[0]; |
aa562407 |
291 | croak "Unable to ->count with a GROUP BY" if defined $self->{attrs}{group_by}; |
6aeb9185 |
292 | unless (defined $self->{count}) { |
976f3686 |
293 | my $attrs = { %{ $self->{attrs} }, |
54540863 |
294 | select => { 'count' => '*' }, |
295 | as => [ 'count' ] }; |
ea20d0fd |
296 | # offset, order by and page are not needed to count. record_filter is cdbi |
297 | delete $attrs->{$_} for qw/rows offset order_by page pager record_filter/; |
3c5b25c5 |
298 | |
fea3d045 |
299 | ($self->{count}) = (ref $self)->new($self->{source}, $attrs)->cursor->next; |
3c5b25c5 |
300 | } |
301 | return 0 unless $self->{count}; |
6aeb9185 |
302 | my $count = $self->{count}; |
303 | $count -= $self->{attrs}{offset} if $self->{attrs}{offset}; |
304 | $count = $self->{attrs}{rows} if |
305 | ($self->{attrs}{rows} && $self->{attrs}{rows} < $count); |
306 | return $count; |
89c0a5a2 |
307 | } |
308 | |
bfab575a |
309 | =head2 count_literal |
6009260a |
310 | |
bfab575a |
311 | Calls search_literal with the passed arguments, then count. |
6009260a |
312 | |
313 | =cut |
314 | |
315 | sub count_literal { shift->search_literal(@_)->count; } |
316 | |
bfab575a |
317 | =head2 all |
ee38fa40 |
318 | |
bfab575a |
319 | Returns all elements in the resultset. Called implictly if the resultset |
320 | is returned in list context. |
ee38fa40 |
321 | |
322 | =cut |
323 | |
89c0a5a2 |
324 | sub all { |
325 | my ($self) = @_; |
c7ce65e6 |
326 | return map { $self->_construct_object(@$_); } |
73f58123 |
327 | $self->cursor->all; |
89c0a5a2 |
328 | } |
329 | |
bfab575a |
330 | =head2 reset |
ee38fa40 |
331 | |
bfab575a |
332 | Resets the resultset's cursor, so you can iterate through the elements again. |
ee38fa40 |
333 | |
334 | =cut |
335 | |
89c0a5a2 |
336 | sub reset { |
337 | my ($self) = @_; |
73f58123 |
338 | $self->cursor->reset; |
89c0a5a2 |
339 | return $self; |
340 | } |
341 | |
bfab575a |
342 | =head2 first |
ee38fa40 |
343 | |
bfab575a |
344 | Resets the resultset and returns the first element. |
ee38fa40 |
345 | |
346 | =cut |
347 | |
89c0a5a2 |
348 | sub first { |
349 | return $_[0]->reset->next; |
350 | } |
351 | |
c01ab172 |
352 | =head2 update(\%values) |
353 | |
354 | Sets the specified columns in the resultset to the supplied values |
355 | |
356 | =cut |
357 | |
358 | sub update { |
359 | my ($self, $values) = @_; |
aa562407 |
360 | croak "Values for update must be a hash" unless ref $values eq 'HASH'; |
c01ab172 |
361 | return $self->{source}->storage->update( |
362 | $self->{source}->from, $values, $self->{cond}); |
363 | } |
364 | |
365 | =head2 update_all(\%values) |
366 | |
367 | Fetches all objects and updates them one at a time. ->update_all will run |
368 | cascade triggers, ->update will not. |
369 | |
370 | =cut |
371 | |
372 | sub update_all { |
373 | my ($self, $values) = @_; |
aa562407 |
374 | croak "Values for update must be a hash" unless ref $values eq 'HASH'; |
c01ab172 |
375 | foreach my $obj ($self->all) { |
376 | $obj->set_columns($values)->update; |
377 | } |
378 | return 1; |
379 | } |
380 | |
bfab575a |
381 | =head2 delete |
ee38fa40 |
382 | |
c01ab172 |
383 | Deletes the contents of the resultset from its result source. |
ee38fa40 |
384 | |
385 | =cut |
386 | |
28927b50 |
387 | sub delete { |
89c0a5a2 |
388 | my ($self) = @_; |
c01ab172 |
389 | $self->{source}->storage->delete($self->{source}->from, $self->{cond}); |
89c0a5a2 |
390 | return 1; |
391 | } |
392 | |
c01ab172 |
393 | =head2 delete_all |
394 | |
395 | Fetches all objects and deletes them one at a time. ->delete_all will run |
396 | cascade triggers, ->delete will not. |
397 | |
398 | =cut |
399 | |
400 | sub delete_all { |
401 | my ($self) = @_; |
402 | $_->delete for $self->all; |
403 | return 1; |
404 | } |
28927b50 |
405 | |
bfab575a |
406 | =head2 pager |
ee38fa40 |
407 | |
408 | Returns a L<Data::Page> object for the current resultset. Only makes |
409 | sense for queries with page turned on. |
410 | |
411 | =cut |
412 | |
3c5b25c5 |
413 | sub pager { |
414 | my ($self) = @_; |
415 | my $attrs = $self->{attrs}; |
aa562407 |
416 | croak "Can't create pager for non-paged rs" unless $self->{page}; |
6aeb9185 |
417 | $attrs->{rows} ||= 10; |
418 | $self->count; |
419 | return $self->{pager} ||= Data::Page->new( |
93b004d3 |
420 | $self->{count}, $attrs->{rows}, $self->{page}); |
3c5b25c5 |
421 | } |
422 | |
bfab575a |
423 | =head2 page($page_num) |
ee38fa40 |
424 | |
bfab575a |
425 | Returns a new resultset for the specified page. |
ee38fa40 |
426 | |
427 | =cut |
428 | |
3c5b25c5 |
429 | sub page { |
430 | my ($self, $page) = @_; |
6aeb9185 |
431 | my $attrs = { %{$self->{attrs}} }; |
3c5b25c5 |
432 | $attrs->{page} = $page; |
fea3d045 |
433 | return (ref $self)->new($self->{source}, $attrs); |
434 | } |
435 | |
436 | =head2 new_result(\%vals) |
437 | |
438 | Creates a result in the resultset's result class |
439 | |
440 | =cut |
441 | |
442 | sub new_result { |
443 | my ($self, $values) = @_; |
444 | $self->{source}->result_class->throw( "new_result needs a hash" ) |
445 | unless (ref $values eq 'HASH'); |
446 | $self->{source}->result_class->throw( "Can't abstract implicit construct, condition not a hash" ) |
447 | if ($self->{cond} && !(ref $self->{cond} eq 'HASH')); |
448 | my %new = %$values; |
449 | my $alias = $self->{attrs}{alias}; |
450 | foreach my $key (keys %{$self->{cond}||{}}) { |
451 | $new{$1} = $self->{cond}{$key} if ($key =~ m/^(?:$alias\.)?([^\.]+)$/); |
452 | } |
097d3227 |
453 | my $obj = $self->{source}->result_class->new(\%new); |
454 | $obj->result_source($self->{source}) if $obj->can('result_source'); |
455 | $obj; |
fea3d045 |
456 | } |
457 | |
458 | =head2 create(\%vals) |
459 | |
460 | Inserts a record into the resultset and returns the object |
461 | |
462 | Effectively a shortcut for ->new_result(\%vals)->insert |
463 | |
464 | =cut |
465 | |
466 | sub create { |
467 | my ($self, $attrs) = @_; |
468 | $self->{source}->result_class->throw( "create needs a hashref" ) unless ref $attrs eq 'HASH'; |
469 | return $self->new_result($attrs)->insert; |
3c5b25c5 |
470 | } |
471 | |
c2b15ecc |
472 | =head2 find_or_create(\%vals) |
473 | |
474 | $class->find_or_create({ key => $val, ... }); |
475 | |
476 | Searches for a record matching the search condition; if it doesn't find one, |
477 | creates one and returns that instead. |
478 | |
479 | =cut |
480 | |
481 | sub find_or_create { |
482 | my $self = shift; |
483 | my $hash = ref $_[0] eq "HASH" ? shift: {@_}; |
484 | my $exists = $self->find($hash); |
485 | return defined($exists) ? $exists : $self->create($hash); |
486 | } |
487 | |
40dbc108 |
488 | =head1 ATTRIBUTES |
076652e8 |
489 | |
bfab575a |
490 | The resultset takes various attributes that modify its behavior. |
491 | Here's an overview of them: |
492 | |
493 | =head2 order_by |
076652e8 |
494 | |
bfab575a |
495 | Which column(s) to order the results by. This is currently passed |
496 | through directly to SQL, so you can give e.g. C<foo DESC> for a |
497 | descending order. |
076652e8 |
498 | |
976f3686 |
499 | =head2 cols (arrayref) |
500 | |
501 | Shortcut to request a particular set of columns to be retrieved - adds |
502 | 'me.' onto the start of any column without a '.' in it and sets 'select' |
503 | from that, then auto-populates 'as' from 'select' as normal |
504 | |
505 | =head2 select (arrayref) |
506 | |
507 | Indicates which columns should be selected from the storage |
508 | |
509 | =head2 as (arrayref) |
076652e8 |
510 | |
976f3686 |
511 | Indicates column names for object inflation |
ee38fa40 |
512 | |
bfab575a |
513 | =head2 join |
ee38fa40 |
514 | |
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515 | Contains a list of relationships that should be joined for this query. Can also |
516 | contain a hash reference to refer to that relation's relations. So, if one column |
517 | in your class C<belongs_to> foo and another C<belongs_to> bar, you can do |
518 | C<< join => [qw/ foo bar /] >> to join both (and e.g. use them for C<order_by>). |
519 | If a foo contains many margles and you want to join those too, you can do |
520 | C<< join => { foo => 'margle' } >>. If you want to fetch the columns from the |
521 | related table as well, see C<prefetch> below. |
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522 | |
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523 | =head2 prefetch |
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524 | |
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525 | Contains a list of relationships that should be fetched along with the main |
526 | query (when they are accessed afterwards they will have already been |
527 | "prefetched"). This is useful for when you know you will need the related |
528 | object(s), because it saves a query. Currently limited to prefetching |
529 | one relationship deep, so unlike C<join>, prefetch must be an arrayref. |
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530 | |
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531 | =head2 from |
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532 | |
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533 | This attribute can contain a arrayref of elements. Each element can be another |
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534 | arrayref, to nest joins, or it can be a hash which represents the two sides |
535 | of the join. |
536 | |
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537 | NOTE: Use this on your own risk. This allows you to shoot your foot off! |
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538 | |
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539 | =head2 page |
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540 | |
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541 | For a paged resultset, specifies which page to retrieve. Leave unset |
542 | for an unpaged resultset. |
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543 | |
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544 | =head2 rows |
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545 | |
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546 | For a paged resultset, how many rows per page |
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547 | |
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548 | =head2 group_by (listref) |
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549 | |
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550 | A listref of columns to group by (note that 'count' doesn't work on grouped |
54540863 |
551 | resultsets) |
552 | |
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553 | group_by => [qw/ column1 column2 ... /] |
554 | |
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555 | =head2 distinct |
556 | |
557 | Set to 1 to group by all columns |
558 | |
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559 | =cut |
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560 | |
89c0a5a2 |
561 | 1; |