Commit | Line | Data |
6f4ddea1 |
1 | package # Hide from PAUSE |
855c6fd0 |
2 | DBIx::Class::SQLAHacks; |
6f4ddea1 |
3 | |
4 | use base qw/SQL::Abstract::Limit/; |
e3764383 |
5 | use strict; |
6 | use warnings; |
b2b22cd6 |
7 | use Carp::Clan qw/^DBIx::Class|^SQL::Abstract/; |
8 | |
9 | BEGIN { |
10 | # reinstall the carp()/croak() functions imported into SQL::Abstract |
11 | # as Carp and Carp::Clan do not like each other much |
12 | no warnings qw/redefine/; |
13 | no strict qw/refs/; |
14 | for my $f (qw/carp croak/) { |
329d7385 |
15 | |
b2b22cd6 |
16 | my $orig = \&{"SQL::Abstract::$f"}; |
17 | *{"SQL::Abstract::$f"} = sub { |
18 | |
19 | local $Carp::CarpLevel = 1; # even though Carp::Clan ignores this, $orig will not |
20 | |
329d7385 |
21 | if (Carp::longmess() =~ /DBIx::Class::SQLAHacks::[\w]+ .+? called \s at/x) { |
b2b22cd6 |
22 | __PACKAGE__->can($f)->(@_); |
23 | } |
24 | else { |
25 | $orig->(@_); |
26 | } |
27 | } |
28 | } |
29 | } |
6f4ddea1 |
30 | |
31 | sub new { |
32 | my $self = shift->SUPER::new(@_); |
33 | |
34 | # This prevents the caching of $dbh in S::A::L, I believe |
35 | # If limit_dialect is a ref (like a $dbh), go ahead and replace |
36 | # it with what it resolves to: |
37 | $self->{limit_dialect} = $self->_find_syntax($self->{limit_dialect}) |
38 | if ref $self->{limit_dialect}; |
39 | |
40 | $self; |
41 | } |
42 | |
43 | |
6f4ddea1 |
44 | # Some databases (sqlite) do not handle multiple parenthesis |
45 | # around in/between arguments. A tentative x IN ( ( 1, 2 ,3) ) |
46 | # is interpreted as x IN 1 or something similar. |
47 | # |
48 | # Since we currently do not have access to the SQLA AST, resort |
49 | # to barbaric mutilation of any SQL supplied in literal form |
50 | |
51 | sub _strip_outer_paren { |
52 | my ($self, $arg) = @_; |
53 | |
54 | return $self->_SWITCH_refkind ($arg, { |
55 | ARRAYREFREF => sub { |
56 | $$arg->[0] = __strip_outer_paren ($$arg->[0]); |
57 | return $arg; |
58 | }, |
59 | SCALARREF => sub { |
60 | return \__strip_outer_paren( $$arg ); |
61 | }, |
62 | FALLBACK => sub { |
63 | return $arg |
64 | }, |
65 | }); |
66 | } |
67 | |
68 | sub __strip_outer_paren { |
69 | my $sql = shift; |
70 | |
71 | if ($sql and not ref $sql) { |
72 | while ($sql =~ /^ \s* \( (.*) \) \s* $/x ) { |
73 | $sql = $1; |
74 | } |
75 | } |
76 | |
77 | return $sql; |
78 | } |
79 | |
80 | sub _where_field_IN { |
81 | my ($self, $lhs, $op, $rhs) = @_; |
82 | $rhs = $self->_strip_outer_paren ($rhs); |
83 | return $self->SUPER::_where_field_IN ($lhs, $op, $rhs); |
84 | } |
85 | |
86 | sub _where_field_BETWEEN { |
87 | my ($self, $lhs, $op, $rhs) = @_; |
88 | $rhs = $self->_strip_outer_paren ($rhs); |
89 | return $self->SUPER::_where_field_BETWEEN ($lhs, $op, $rhs); |
90 | } |
91 | |
15827712 |
92 | # Slow but ANSI standard Limit/Offset support. DB2 uses this |
6f4ddea1 |
93 | sub _RowNumberOver { |
94 | my ($self, $sql, $order, $rows, $offset ) = @_; |
95 | |
96 | $offset += 1; |
03e1d9af |
97 | my $last = $rows + $offset - 1; |
6f4ddea1 |
98 | my ( $order_by ) = $self->_order_by( $order ); |
99 | |
100 | $sql = <<"SQL"; |
101 | SELECT * FROM |
102 | ( |
103 | SELECT Q1.*, ROW_NUMBER() OVER( ) AS ROW_NUM FROM ( |
104 | $sql |
105 | $order_by |
106 | ) Q1 |
107 | ) Q2 |
108 | WHERE ROW_NUM BETWEEN $offset AND $last |
109 | |
110 | SQL |
111 | |
112 | return $sql; |
113 | } |
114 | |
15827712 |
115 | # Crappy Top based Limit/Offset support. MSSQL uses this currently, |
116 | # but may have to switch to RowNumberOver one day |
117 | sub _Top { |
118 | my ( $self, $sql, $order, $rows, $offset ) = @_; |
119 | |
b1e1d073 |
120 | # mangle the input sql so it can be properly aliased in the outer queries |
121 | $sql =~ s/^ \s* SELECT \s+ (.+?) \s+ (?=FROM)//ix |
122 | or croak "Unrecognizable SELECT: $sql"; |
42e5b103 |
123 | my $sql_select = $1; |
124 | my @sql_select = split (/\s*,\s*/, $sql_select); |
125 | |
126 | # we can't support subqueries (in fact MSSQL can't) - croak |
127 | if (@sql_select != @{$self->{_dbic_rs_attrs}{select}}) { |
128 | croak (sprintf ( |
129 | 'SQL SELECT did not parse cleanly - retrieved %d comma separated elements, while ' |
130 | . 'the resultset select attribure contains %d elements: %s', |
131 | scalar @sql_select, |
132 | scalar @{$self->{_dbic_rs_attrs}{select}}, |
133 | $sql_select, |
134 | )); |
135 | } |
b1e1d073 |
136 | |
42e5b103 |
137 | my $name_sep = $self->name_sep || '.'; |
138 | $name_sep = "\Q$name_sep\E"; |
139 | my $col_re = qr/ ^ (?: (.+) $name_sep )? ([^$name_sep]+) $ /x; |
b1e1d073 |
140 | |
42e5b103 |
141 | # construct the new select lists, rename(alias) some columns if necessary |
142 | my (@outer_select, @inner_select, %seen_names, %col_aliases, %outer_col_aliases); |
b1e1d073 |
143 | |
42e5b103 |
144 | for (@{$self->{_dbic_rs_attrs}{select}}) { |
145 | next if ref $_; |
146 | my ($table, $orig_colname) = ( $_ =~ $col_re ); |
147 | next unless $table; |
148 | $seen_names{$orig_colname}++; |
149 | } |
b1e1d073 |
150 | |
42e5b103 |
151 | for my $i (0 .. $#sql_select) { |
b1e1d073 |
152 | |
42e5b103 |
153 | my $colsel_arg = $self->{_dbic_rs_attrs}{select}[$i]; |
154 | my $colsel_sql = $sql_select[$i]; |
b1e1d073 |
155 | |
42e5b103 |
156 | # this may or may not work (in case of a scalarref or something) |
157 | my ($table, $orig_colname) = ( $colsel_arg =~ $col_re ); |
b1e1d073 |
158 | |
42e5b103 |
159 | my $quoted_alias; |
160 | # do not attempt to understand non-scalar selects - alias numerically |
161 | if (ref $colsel_arg) { |
162 | $quoted_alias = $self->_quote ('column_' . (@inner_select + 1) ); |
163 | } |
164 | # column name seen more than once - alias it |
165 | elsif ($orig_colname && ($seen_names{$orig_colname} > 1) ) { |
166 | $quoted_alias = $self->_quote ("${table}__${orig_colname}"); |
167 | } |
b1e1d073 |
168 | |
42e5b103 |
169 | # we did rename - make a record and adjust |
170 | if ($quoted_alias) { |
171 | # alias inner |
172 | push @inner_select, "$colsel_sql AS $quoted_alias"; |
173 | |
174 | # push alias to outer |
175 | push @outer_select, $quoted_alias; |
176 | |
177 | # Any aliasing accumulated here will be considered |
178 | # both for inner and outer adjustments of ORDER BY |
179 | $self->__record_alias ( |
180 | \%col_aliases, |
181 | $quoted_alias, |
182 | $colsel_arg, |
183 | $table ? $orig_colname : undef, |
184 | ); |
b1e1d073 |
185 | } |
186 | |
42e5b103 |
187 | # otherwise just leave things intact inside, and use the abbreviated one outside |
188 | # (as we do not have table names anymore) |
189 | else { |
190 | push @inner_select, $colsel_sql; |
191 | |
192 | my $outer_quoted = $self->_quote ($orig_colname); # it was not a duplicate so should just work |
193 | push @outer_select, $outer_quoted; |
194 | $self->__record_alias ( |
195 | \%outer_col_aliases, |
196 | $outer_quoted, |
197 | $colsel_arg, |
198 | $table ? $orig_colname : undef, |
199 | ); |
200 | } |
b1e1d073 |
201 | } |
202 | |
203 | my $outer_select = join (', ', @outer_select ); |
42e5b103 |
204 | my $inner_select = join (', ', @inner_select ); |
b1e1d073 |
205 | |
42e5b103 |
206 | %outer_col_aliases = (%outer_col_aliases, %col_aliases); |
b1e1d073 |
207 | |
208 | # deal with order |
15827712 |
209 | croak '$order supplied to SQLAHacks limit emulators must be a hash' |
210 | if (ref $order ne 'HASH'); |
211 | |
8f6dbee9 |
212 | $order = { %$order }; #copy |
213 | |
02d133f0 |
214 | my $req_order = $order->{order_by}; |
215 | my $limit_order = |
893403c8 |
216 | scalar $self->_order_by_chunks ($req_order) # examine normalized version, collapses nesting |
02d133f0 |
217 | ? $req_order |
218 | : $order->{_virtual_order_by} |
219 | ; |
b1e1d073 |
220 | |
42e5b103 |
221 | my ( $order_by_inner, $order_by_outer ) = $self->_order_directions($limit_order); |
222 | my $order_by_requested = $self->_order_by ($req_order); |
15827712 |
223 | |
64c7c000 |
224 | # generate the rest |
225 | delete $order->{$_} for qw/order_by _virtual_order_by/; |
226 | my $grpby_having = $self->_order_by ($order); |
227 | |
228 | # short circuit for counts - the ordering complexity is needless |
229 | if ($self->{_dbic_rs_attrs}{-for_count_only}) { |
230 | return "SELECT TOP $rows $inner_select $sql $grpby_having $order_by_outer"; |
231 | } |
232 | |
42e5b103 |
233 | # we can't really adjust the order_by columns, as introspection is lacking |
234 | # resort to simple substitution |
235 | for my $col (keys %outer_col_aliases) { |
236 | for ($order_by_requested, $order_by_outer) { |
237 | $_ =~ s/\s+$col\s+/ $outer_col_aliases{$col} /g; |
b1e1d073 |
238 | } |
239 | } |
42e5b103 |
240 | for my $col (keys %col_aliases) { |
241 | $order_by_inner =~ s/\s+$col\s+/$col_aliases{$col}/g; |
242 | } |
1cbd3034 |
243 | |
02d133f0 |
244 | |
42e5b103 |
245 | my $inner_lim = $rows + $offset; |
15827712 |
246 | |
618a0fe3 |
247 | $sql = "SELECT TOP $inner_lim $inner_select $sql $grpby_having $order_by_inner"; |
42e5b103 |
248 | |
249 | if ($offset) { |
250 | $sql = <<"SQL"; |
b1e1d073 |
251 | |
252 | SELECT TOP $rows $outer_select FROM |
15827712 |
253 | ( |
42e5b103 |
254 | $sql |
02d133f0 |
255 | ) AS me |
15827712 |
256 | $order_by_outer |
b1e1d073 |
257 | SQL |
258 | |
42e5b103 |
259 | } |
15827712 |
260 | |
42e5b103 |
261 | if ($order_by_requested) { |
b1e1d073 |
262 | $sql = <<"SQL"; |
263 | |
42e5b103 |
264 | SELECT $outer_select FROM |
02d133f0 |
265 | ( $sql ) AS me |
42e5b103 |
266 | $order_by_requested; |
15827712 |
267 | SQL |
b1e1d073 |
268 | |
269 | } |
270 | |
271 | return $sql; |
15827712 |
272 | } |
273 | |
42e5b103 |
274 | # action at a distance to shorten Top code above |
275 | sub __record_alias { |
276 | my ($self, $register, $alias, $fqcol, $col) = @_; |
277 | |
278 | # record qualified name |
279 | $register->{$fqcol} = $alias; |
280 | $register->{$self->_quote($fqcol)} = $alias; |
281 | |
282 | return unless $col; |
283 | |
b6d347e0 |
284 | # record unqualified name, undef (no adjustment) if a duplicate is found |
42e5b103 |
285 | if (exists $register->{$col}) { |
286 | $register->{$col} = undef; |
287 | } |
288 | else { |
289 | $register->{$col} = $alias; |
290 | } |
291 | |
292 | $register->{$self->_quote($col)} = $register->{$col}; |
293 | } |
294 | |
15827712 |
295 | |
6f4ddea1 |
296 | |
297 | # While we're at it, this should make LIMIT queries more efficient, |
298 | # without digging into things too deeply |
6f4ddea1 |
299 | sub _find_syntax { |
300 | my ($self, $syntax) = @_; |
ac788c46 |
301 | return $self->{_cached_syntax} ||= $self->SUPER::_find_syntax($syntax); |
6f4ddea1 |
302 | } |
303 | |
ec7cfd36 |
304 | my $for_syntax = { |
305 | update => 'FOR UPDATE', |
306 | shared => 'FOR SHARE', |
307 | }; |
6f4ddea1 |
308 | sub select { |
309 | my ($self, $table, $fields, $where, $order, @rest) = @_; |
1cbd3034 |
310 | |
311 | $self->{"${_}_bind"} = [] for (qw/having from order/); |
db56cf3d |
312 | |
6f4ddea1 |
313 | if (ref $table eq 'SCALAR') { |
314 | $table = $$table; |
315 | } |
316 | elsif (not ref $table) { |
317 | $table = $self->_quote($table); |
318 | } |
319 | local $self->{rownum_hack_count} = 1 |
320 | if (defined $rest[0] && $self->{limit_dialect} eq 'RowNum'); |
321 | @rest = (-1) unless defined $rest[0]; |
e8fcf76f |
322 | croak "LIMIT 0 Does Not Compute" if $rest[0] == 0; |
6f4ddea1 |
323 | # and anyway, SQL::Abstract::Limit will cause a barf if we don't first |
db56cf3d |
324 | my ($sql, @where_bind) = $self->SUPER::select( |
6f4ddea1 |
325 | $table, $self->_recurse_fields($fields), $where, $order, @rest |
326 | ); |
ec7cfd36 |
327 | if (my $for = delete $self->{_dbic_rs_attrs}{for}) { |
328 | $sql .= " $for_syntax->{$for}" if $for_syntax->{$for}; |
329 | } |
330 | |
1cbd3034 |
331 | return wantarray ? ($sql, @{$self->{from_bind}}, @where_bind, @{$self->{having_bind}}, @{$self->{order_bind}} ) : $sql; |
6f4ddea1 |
332 | } |
333 | |
334 | sub insert { |
335 | my $self = shift; |
336 | my $table = shift; |
337 | $table = $self->_quote($table) unless ref($table); |
7a72e5a5 |
338 | |
339 | # SQLA will emit INSERT INTO $table ( ) VALUES ( ) |
340 | # which is sadly understood only by MySQL. Change default behavior here, |
341 | # until SQLA2 comes with proper dialect support |
342 | if (! $_[0] or (ref $_[0] eq 'HASH' and !keys %{$_[0]} ) ) { |
343 | return "INSERT INTO ${table} DEFAULT VALUES" |
344 | } |
345 | |
6f4ddea1 |
346 | $self->SUPER::insert($table, @_); |
347 | } |
348 | |
349 | sub update { |
350 | my $self = shift; |
351 | my $table = shift; |
352 | $table = $self->_quote($table) unless ref($table); |
353 | $self->SUPER::update($table, @_); |
354 | } |
355 | |
356 | sub delete { |
357 | my $self = shift; |
358 | my $table = shift; |
359 | $table = $self->_quote($table) unless ref($table); |
360 | $self->SUPER::delete($table, @_); |
361 | } |
362 | |
363 | sub _emulate_limit { |
364 | my $self = shift; |
365 | if ($_[3] == -1) { |
366 | return $_[1].$self->_order_by($_[2]); |
367 | } else { |
368 | return $self->SUPER::_emulate_limit(@_); |
369 | } |
370 | } |
371 | |
372 | sub _recurse_fields { |
373 | my ($self, $fields, $params) = @_; |
374 | my $ref = ref $fields; |
375 | return $self->_quote($fields) unless $ref; |
376 | return $$fields if $ref eq 'SCALAR'; |
377 | |
378 | if ($ref eq 'ARRAY') { |
379 | return join(', ', map { |
380 | $self->_recurse_fields($_) |
381 | .(exists $self->{rownum_hack_count} && !($params && $params->{no_rownum_hack}) |
382 | ? ' AS col'.$self->{rownum_hack_count}++ |
383 | : '') |
384 | } @$fields); |
385 | } elsif ($ref eq 'HASH') { |
386 | foreach my $func (keys %$fields) { |
db56cf3d |
387 | if ($func eq 'distinct') { |
388 | my $_fields = $fields->{$func}; |
389 | if (ref $_fields eq 'ARRAY' && @{$_fields} > 1) { |
04ebc6f4 |
390 | croak ( |
391 | 'The select => { distinct => ... } syntax is not supported for multiple columns.' |
392 | .' Instead please use { group_by => [ qw/' . (join ' ', @$_fields) . '/ ] }' |
393 | .' or { select => [ qw/' . (join ' ', @$_fields) . '/ ], distinct => 1 }' |
394 | ); |
db56cf3d |
395 | } |
396 | else { |
397 | $_fields = @{$_fields}[0] if ref $_fields eq 'ARRAY'; |
04ebc6f4 |
398 | carp ( |
399 | 'The select => { distinct => ... } syntax will be deprecated in DBIC version 0.09,' |
400 | ." please use { group_by => '${_fields}' } or { select => '${_fields}', distinct => 1 }" |
401 | ); |
db56cf3d |
402 | } |
403 | } |
6f4ddea1 |
404 | return $self->_sqlcase($func) |
405 | .'( '.$self->_recurse_fields($fields->{$func}).' )'; |
406 | } |
407 | } |
408 | # Is the second check absolutely necessary? |
409 | elsif ( $ref eq 'REF' and ref($$fields) eq 'ARRAY' ) { |
db56cf3d |
410 | return $self->_fold_sqlbind( $fields ); |
6f4ddea1 |
411 | } |
412 | else { |
e8fcf76f |
413 | croak($ref . qq{ unexpected in _recurse_fields()}) |
6f4ddea1 |
414 | } |
415 | } |
416 | |
417 | sub _order_by { |
1cbd3034 |
418 | my ($self, $arg) = @_; |
15827712 |
419 | |
1cbd3034 |
420 | if (ref $arg eq 'HASH' and keys %$arg and not grep { $_ =~ /^-(?:desc|asc)/i } keys %$arg ) { |
421 | |
422 | my $ret = ''; |
423 | |
424 | if (defined $arg->{group_by}) { |
6f4ddea1 |
425 | $ret = $self->_sqlcase(' group by ') |
1cbd3034 |
426 | .$self->_recurse_fields($arg->{group_by}, { no_rownum_hack => 1 }); |
6f4ddea1 |
427 | } |
15827712 |
428 | |
1cbd3034 |
429 | if (defined $arg->{having}) { |
430 | my ($frag, @bind) = $self->_recurse_where($arg->{having}); |
431 | push(@{$self->{having_bind}}, @bind); |
6f4ddea1 |
432 | $ret .= $self->_sqlcase(' having ').$frag; |
433 | } |
15827712 |
434 | |
1cbd3034 |
435 | if (defined $arg->{order_by}) { |
436 | my ($frag, @bind) = $self->SUPER::_order_by($arg->{order_by}); |
437 | push(@{$self->{order_bind}}, @bind); |
438 | $ret .= $frag; |
6f4ddea1 |
439 | } |
15827712 |
440 | |
1cbd3034 |
441 | return $ret; |
fde3719a |
442 | } |
1cbd3034 |
443 | else { |
444 | my ($sql, @bind) = $self->SUPER::_order_by ($arg); |
445 | push(@{$self->{order_bind}}, @bind); |
446 | return $sql; |
fd4cb60a |
447 | } |
6f4ddea1 |
448 | } |
449 | |
1cbd3034 |
450 | sub _order_directions { |
fd4cb60a |
451 | my ($self, $order) = @_; |
15827712 |
452 | |
1cbd3034 |
453 | # strip bind values - none of the current _order_directions users support them |
454 | return $self->SUPER::_order_directions( [ map |
455 | { ref $_ ? $_->[0] : $_ } |
456 | $self->_order_by_chunks ($order) |
457 | ]); |
fd4cb60a |
458 | } |
459 | |
6f4ddea1 |
460 | sub _table { |
461 | my ($self, $from) = @_; |
462 | if (ref $from eq 'ARRAY') { |
463 | return $self->_recurse_from(@$from); |
464 | } elsif (ref $from eq 'HASH') { |
465 | return $self->_make_as($from); |
466 | } else { |
467 | return $from; # would love to quote here but _table ends up getting called |
468 | # twice during an ->select without a limit clause due to |
469 | # the way S::A::Limit->select works. should maybe consider |
470 | # bypassing this and doing S::A::select($self, ...) in |
471 | # our select method above. meantime, quoting shims have |
472 | # been added to select/insert/update/delete here |
473 | } |
474 | } |
475 | |
476 | sub _recurse_from { |
477 | my ($self, $from, @join) = @_; |
478 | my @sqlf; |
479 | push(@sqlf, $self->_make_as($from)); |
480 | foreach my $j (@join) { |
481 | my ($to, $on) = @$j; |
482 | |
483 | # check whether a join type exists |
484 | my $join_clause = ''; |
485 | my $to_jt = ref($to) eq 'ARRAY' ? $to->[0] : $to; |
486 | if (ref($to_jt) eq 'HASH' and exists($to_jt->{-join_type})) { |
487 | $join_clause = ' '.uc($to_jt->{-join_type}).' JOIN '; |
488 | } else { |
489 | $join_clause = ' JOIN '; |
490 | } |
491 | push(@sqlf, $join_clause); |
492 | |
493 | if (ref $to eq 'ARRAY') { |
494 | push(@sqlf, '(', $self->_recurse_from(@$to), ')'); |
495 | } else { |
496 | push(@sqlf, $self->_make_as($to)); |
497 | } |
498 | push(@sqlf, ' ON ', $self->_join_condition($on)); |
499 | } |
500 | return join('', @sqlf); |
501 | } |
502 | |
db56cf3d |
503 | sub _fold_sqlbind { |
504 | my ($self, $sqlbind) = @_; |
69989ea9 |
505 | |
506 | my @sqlbind = @$$sqlbind; # copy |
507 | my $sql = shift @sqlbind; |
508 | push @{$self->{from_bind}}, @sqlbind; |
509 | |
db56cf3d |
510 | return $sql; |
6f4ddea1 |
511 | } |
512 | |
513 | sub _make_as { |
514 | my ($self, $from) = @_; |
db56cf3d |
515 | return join(' ', map { (ref $_ eq 'SCALAR' ? $$_ |
516 | : ref $_ eq 'REF' ? $self->_fold_sqlbind($_) |
517 | : $self->_quote($_)) |
6f4ddea1 |
518 | } reverse each %{$self->_skip_options($from)}); |
519 | } |
520 | |
521 | sub _skip_options { |
522 | my ($self, $hash) = @_; |
523 | my $clean_hash = {}; |
524 | $clean_hash->{$_} = $hash->{$_} |
525 | for grep {!/^-/} keys %$hash; |
526 | return $clean_hash; |
527 | } |
528 | |
529 | sub _join_condition { |
530 | my ($self, $cond) = @_; |
531 | if (ref $cond eq 'HASH') { |
532 | my %j; |
533 | for (keys %$cond) { |
534 | my $v = $cond->{$_}; |
535 | if (ref $v) { |
e8fcf76f |
536 | croak (ref($v) . qq{ reference arguments are not supported in JOINS - try using \"..." instead'}) |
6f4ddea1 |
537 | if ref($v) ne 'SCALAR'; |
538 | $j{$_} = $v; |
539 | } |
540 | else { |
541 | my $x = '= '.$self->_quote($v); $j{$_} = \$x; |
542 | } |
543 | }; |
544 | return scalar($self->_recurse_where(\%j)); |
545 | } elsif (ref $cond eq 'ARRAY') { |
546 | return join(' OR ', map { $self->_join_condition($_) } @$cond); |
547 | } else { |
548 | die "Can't handle this yet!"; |
549 | } |
550 | } |
551 | |
552 | sub _quote { |
553 | my ($self, $label) = @_; |
554 | return '' unless defined $label; |
555 | return "*" if $label eq '*'; |
556 | return $label unless $self->{quote_char}; |
557 | if(ref $self->{quote_char} eq "ARRAY"){ |
558 | return $self->{quote_char}->[0] . $label . $self->{quote_char}->[1] |
559 | if !defined $self->{name_sep}; |
560 | my $sep = $self->{name_sep}; |
561 | return join($self->{name_sep}, |
562 | map { $self->{quote_char}->[0] . $_ . $self->{quote_char}->[1] } |
563 | split(/\Q$sep\E/,$label)); |
564 | } |
565 | return $self->SUPER::_quote($label); |
566 | } |
567 | |
568 | sub limit_dialect { |
569 | my $self = shift; |
570 | $self->{limit_dialect} = shift if @_; |
571 | return $self->{limit_dialect}; |
572 | } |
573 | |
574 | sub quote_char { |
575 | my $self = shift; |
576 | $self->{quote_char} = shift if @_; |
577 | return $self->{quote_char}; |
578 | } |
579 | |
580 | sub name_sep { |
581 | my $self = shift; |
582 | $self->{name_sep} = shift if @_; |
583 | return $self->{name_sep}; |
584 | } |
585 | |
586 | 1; |
587 | |
588 | __END__ |
589 | |
590 | =pod |
591 | |
592 | =head1 NAME |
593 | |
855c6fd0 |
594 | DBIx::Class::SQLAHacks - This module is a subclass of SQL::Abstract::Limit |
595 | and includes a number of DBIC-specific workarounds, not yet suitable for |
596 | inclusion into SQLA proper. |
6f4ddea1 |
597 | |
598 | =head1 METHODS |
599 | |
600 | =head2 new |
601 | |
602 | Tries to determine limit dialect. |
603 | |
604 | =head2 select |
605 | |
606 | Quotes table names, handles "limit" dialects (e.g. where rownum between x and |
607 | y), supports SELECT ... FOR UPDATE and SELECT ... FOR SHARE. |
608 | |
609 | =head2 insert update delete |
610 | |
611 | Just quotes table names. |
612 | |
613 | =head2 limit_dialect |
614 | |
615 | Specifies the dialect of used for implementing an SQL "limit" clause for |
616 | restricting the number of query results returned. Valid values are: RowNum. |
617 | |
618 | See L<DBIx::Class::Storage::DBI/connect_info> for details. |
619 | |
620 | =head2 name_sep |
621 | |
622 | Character separating quoted table names. |
623 | |
624 | See L<DBIx::Class::Storage::DBI/connect_info> for details. |
625 | |
626 | =head2 quote_char |
627 | |
628 | Set to an array-ref to specify separate left and right quotes for table names. |
629 | |
630 | See L<DBIx::Class::Storage::DBI/connect_info> for details. |
631 | |
632 | =cut |
633 | |