Commit | Line | Data |
6f4ddea1 |
1 | package # Hide from PAUSE |
855c6fd0 |
2 | DBIx::Class::SQLAHacks; |
6f4ddea1 |
3 | |
998373c2 |
4 | # This module is a subclass of SQL::Abstract::Limit and includes a number |
5 | # of DBIC-specific workarounds, not yet suitable for inclusion into the |
6 | # SQLA core |
7 | |
6f4ddea1 |
8 | use base qw/SQL::Abstract::Limit/; |
e3764383 |
9 | use strict; |
10 | use warnings; |
b2b22cd6 |
11 | use Carp::Clan qw/^DBIx::Class|^SQL::Abstract/; |
12 | |
13 | BEGIN { |
14 | # reinstall the carp()/croak() functions imported into SQL::Abstract |
15 | # as Carp and Carp::Clan do not like each other much |
16 | no warnings qw/redefine/; |
17 | no strict qw/refs/; |
18 | for my $f (qw/carp croak/) { |
329d7385 |
19 | |
b2b22cd6 |
20 | my $orig = \&{"SQL::Abstract::$f"}; |
21 | *{"SQL::Abstract::$f"} = sub { |
22 | |
23 | local $Carp::CarpLevel = 1; # even though Carp::Clan ignores this, $orig will not |
24 | |
329d7385 |
25 | if (Carp::longmess() =~ /DBIx::Class::SQLAHacks::[\w]+ .+? called \s at/x) { |
b2b22cd6 |
26 | __PACKAGE__->can($f)->(@_); |
27 | } |
28 | else { |
29 | $orig->(@_); |
30 | } |
31 | } |
32 | } |
33 | } |
6f4ddea1 |
34 | |
998373c2 |
35 | |
36 | # Tries to determine limit dialect. |
37 | # |
6f4ddea1 |
38 | sub new { |
39 | my $self = shift->SUPER::new(@_); |
40 | |
41 | # This prevents the caching of $dbh in S::A::L, I believe |
42 | # If limit_dialect is a ref (like a $dbh), go ahead and replace |
43 | # it with what it resolves to: |
44 | $self->{limit_dialect} = $self->_find_syntax($self->{limit_dialect}) |
45 | if ref $self->{limit_dialect}; |
46 | |
47 | $self; |
48 | } |
49 | |
6f4ddea1 |
50 | # Some databases (sqlite) do not handle multiple parenthesis |
998373c2 |
51 | # around in/between arguments. A tentative x IN ( (1, 2 ,3) ) |
6f4ddea1 |
52 | # is interpreted as x IN 1 or something similar. |
53 | # |
54 | # Since we currently do not have access to the SQLA AST, resort |
55 | # to barbaric mutilation of any SQL supplied in literal form |
6f4ddea1 |
56 | sub _strip_outer_paren { |
57 | my ($self, $arg) = @_; |
58 | |
59 | return $self->_SWITCH_refkind ($arg, { |
60 | ARRAYREFREF => sub { |
61 | $$arg->[0] = __strip_outer_paren ($$arg->[0]); |
62 | return $arg; |
63 | }, |
64 | SCALARREF => sub { |
65 | return \__strip_outer_paren( $$arg ); |
66 | }, |
67 | FALLBACK => sub { |
68 | return $arg |
69 | }, |
70 | }); |
71 | } |
72 | |
73 | sub __strip_outer_paren { |
74 | my $sql = shift; |
75 | |
76 | if ($sql and not ref $sql) { |
77 | while ($sql =~ /^ \s* \( (.*) \) \s* $/x ) { |
78 | $sql = $1; |
79 | } |
80 | } |
81 | |
82 | return $sql; |
83 | } |
84 | |
85 | sub _where_field_IN { |
86 | my ($self, $lhs, $op, $rhs) = @_; |
87 | $rhs = $self->_strip_outer_paren ($rhs); |
88 | return $self->SUPER::_where_field_IN ($lhs, $op, $rhs); |
89 | } |
90 | |
91 | sub _where_field_BETWEEN { |
92 | my ($self, $lhs, $op, $rhs) = @_; |
93 | $rhs = $self->_strip_outer_paren ($rhs); |
94 | return $self->SUPER::_where_field_BETWEEN ($lhs, $op, $rhs); |
95 | } |
96 | |
15827712 |
97 | # Slow but ANSI standard Limit/Offset support. DB2 uses this |
6f4ddea1 |
98 | sub _RowNumberOver { |
99 | my ($self, $sql, $order, $rows, $offset ) = @_; |
100 | |
101 | $offset += 1; |
03e1d9af |
102 | my $last = $rows + $offset - 1; |
6f4ddea1 |
103 | my ( $order_by ) = $self->_order_by( $order ); |
104 | |
105 | $sql = <<"SQL"; |
106 | SELECT * FROM |
107 | ( |
108 | SELECT Q1.*, ROW_NUMBER() OVER( ) AS ROW_NUM FROM ( |
109 | $sql |
110 | $order_by |
111 | ) Q1 |
112 | ) Q2 |
113 | WHERE ROW_NUM BETWEEN $offset AND $last |
114 | |
115 | SQL |
116 | |
117 | return $sql; |
118 | } |
119 | |
15827712 |
120 | # Crappy Top based Limit/Offset support. MSSQL uses this currently, |
121 | # but may have to switch to RowNumberOver one day |
122 | sub _Top { |
123 | my ( $self, $sql, $order, $rows, $offset ) = @_; |
124 | |
b1e1d073 |
125 | # mangle the input sql so it can be properly aliased in the outer queries |
126 | $sql =~ s/^ \s* SELECT \s+ (.+?) \s+ (?=FROM)//ix |
127 | or croak "Unrecognizable SELECT: $sql"; |
42e5b103 |
128 | my $sql_select = $1; |
129 | my @sql_select = split (/\s*,\s*/, $sql_select); |
130 | |
131 | # we can't support subqueries (in fact MSSQL can't) - croak |
132 | if (@sql_select != @{$self->{_dbic_rs_attrs}{select}}) { |
133 | croak (sprintf ( |
134 | 'SQL SELECT did not parse cleanly - retrieved %d comma separated elements, while ' |
135 | . 'the resultset select attribure contains %d elements: %s', |
136 | scalar @sql_select, |
137 | scalar @{$self->{_dbic_rs_attrs}{select}}, |
138 | $sql_select, |
139 | )); |
140 | } |
b1e1d073 |
141 | |
42e5b103 |
142 | my $name_sep = $self->name_sep || '.'; |
ac93965c |
143 | my $esc_name_sep = "\Q$name_sep\E"; |
144 | my $col_re = qr/ ^ (?: (.+) $esc_name_sep )? ([^$esc_name_sep]+) $ /x; |
145 | |
146 | my $rs_alias = $self->{_dbic_rs_attrs}{alias}; |
147 | my $quoted_rs_alias = $self->_quote ($rs_alias); |
b1e1d073 |
148 | |
42e5b103 |
149 | # construct the new select lists, rename(alias) some columns if necessary |
150 | my (@outer_select, @inner_select, %seen_names, %col_aliases, %outer_col_aliases); |
b1e1d073 |
151 | |
42e5b103 |
152 | for (@{$self->{_dbic_rs_attrs}{select}}) { |
153 | next if ref $_; |
154 | my ($table, $orig_colname) = ( $_ =~ $col_re ); |
155 | next unless $table; |
156 | $seen_names{$orig_colname}++; |
157 | } |
b1e1d073 |
158 | |
42e5b103 |
159 | for my $i (0 .. $#sql_select) { |
b1e1d073 |
160 | |
42e5b103 |
161 | my $colsel_arg = $self->{_dbic_rs_attrs}{select}[$i]; |
162 | my $colsel_sql = $sql_select[$i]; |
b1e1d073 |
163 | |
42e5b103 |
164 | # this may or may not work (in case of a scalarref or something) |
165 | my ($table, $orig_colname) = ( $colsel_arg =~ $col_re ); |
b1e1d073 |
166 | |
42e5b103 |
167 | my $quoted_alias; |
168 | # do not attempt to understand non-scalar selects - alias numerically |
169 | if (ref $colsel_arg) { |
170 | $quoted_alias = $self->_quote ('column_' . (@inner_select + 1) ); |
171 | } |
172 | # column name seen more than once - alias it |
173 | elsif ($orig_colname && ($seen_names{$orig_colname} > 1) ) { |
174 | $quoted_alias = $self->_quote ("${table}__${orig_colname}"); |
175 | } |
b1e1d073 |
176 | |
42e5b103 |
177 | # we did rename - make a record and adjust |
178 | if ($quoted_alias) { |
179 | # alias inner |
180 | push @inner_select, "$colsel_sql AS $quoted_alias"; |
181 | |
182 | # push alias to outer |
183 | push @outer_select, $quoted_alias; |
184 | |
185 | # Any aliasing accumulated here will be considered |
186 | # both for inner and outer adjustments of ORDER BY |
187 | $self->__record_alias ( |
188 | \%col_aliases, |
189 | $quoted_alias, |
190 | $colsel_arg, |
191 | $table ? $orig_colname : undef, |
192 | ); |
b1e1d073 |
193 | } |
194 | |
42e5b103 |
195 | # otherwise just leave things intact inside, and use the abbreviated one outside |
196 | # (as we do not have table names anymore) |
197 | else { |
198 | push @inner_select, $colsel_sql; |
199 | |
200 | my $outer_quoted = $self->_quote ($orig_colname); # it was not a duplicate so should just work |
201 | push @outer_select, $outer_quoted; |
202 | $self->__record_alias ( |
203 | \%outer_col_aliases, |
204 | $outer_quoted, |
205 | $colsel_arg, |
206 | $table ? $orig_colname : undef, |
207 | ); |
208 | } |
b1e1d073 |
209 | } |
210 | |
211 | my $outer_select = join (', ', @outer_select ); |
42e5b103 |
212 | my $inner_select = join (', ', @inner_select ); |
b1e1d073 |
213 | |
42e5b103 |
214 | %outer_col_aliases = (%outer_col_aliases, %col_aliases); |
b1e1d073 |
215 | |
216 | # deal with order |
15827712 |
217 | croak '$order supplied to SQLAHacks limit emulators must be a hash' |
218 | if (ref $order ne 'HASH'); |
219 | |
8f6dbee9 |
220 | $order = { %$order }; #copy |
221 | |
02d133f0 |
222 | my $req_order = $order->{order_by}; |
15827712 |
223 | |
e2db8319 |
224 | # examine normalized version, collapses nesting |
225 | my $limit_order; |
226 | if (scalar $self->_order_by_chunks ($req_order)) { |
227 | $limit_order = $req_order; |
228 | } |
229 | else { |
e2db8319 |
230 | $limit_order = [ map |
231 | { join ('', $rs_alias, $name_sep, $_ ) } |
232 | ( $self->{_dbic_rs_attrs}{_source_handle}->resolve->primary_columns ) |
233 | ]; |
234 | } |
1cbd3034 |
235 | |
42e5b103 |
236 | my ( $order_by_inner, $order_by_outer ) = $self->_order_directions($limit_order); |
237 | my $order_by_requested = $self->_order_by ($req_order); |
15827712 |
238 | |
64c7c000 |
239 | # generate the rest |
e2db8319 |
240 | delete $order->{order_by}; |
8f6dbee9 |
241 | my $grpby_having = $self->_order_by ($order); |
242 | |
64c7c000 |
243 | # short circuit for counts - the ordering complexity is needless |
244 | if ($self->{_dbic_rs_attrs}{-for_count_only}) { |
245 | return "SELECT TOP $rows $inner_select $sql $grpby_having $order_by_outer"; |
246 | } |
247 | |
42e5b103 |
248 | # we can't really adjust the order_by columns, as introspection is lacking |
249 | # resort to simple substitution |
250 | for my $col (keys %outer_col_aliases) { |
251 | for ($order_by_requested, $order_by_outer) { |
252 | $_ =~ s/\s+$col\s+/ $outer_col_aliases{$col} /g; |
b1e1d073 |
253 | } |
254 | } |
42e5b103 |
255 | for my $col (keys %col_aliases) { |
9c1ffdde |
256 | $order_by_inner =~ s/\s+$col\s+/ $col_aliases{$col} /g; |
42e5b103 |
257 | } |
15827712 |
258 | |
15827712 |
259 | |
42e5b103 |
260 | my $inner_lim = $rows + $offset; |
15827712 |
261 | |
618a0fe3 |
262 | $sql = "SELECT TOP $inner_lim $inner_select $sql $grpby_having $order_by_inner"; |
42e5b103 |
263 | |
264 | if ($offset) { |
265 | $sql = <<"SQL"; |
b1e1d073 |
266 | |
267 | SELECT TOP $rows $outer_select FROM |
15827712 |
268 | ( |
42e5b103 |
269 | $sql |
ac93965c |
270 | ) $quoted_rs_alias |
15827712 |
271 | $order_by_outer |
b1e1d073 |
272 | SQL |
273 | |
42e5b103 |
274 | } |
15827712 |
275 | |
42e5b103 |
276 | if ($order_by_requested) { |
b1e1d073 |
277 | $sql = <<"SQL"; |
15827712 |
278 | |
42e5b103 |
279 | SELECT $outer_select FROM |
ac93965c |
280 | ( $sql ) $quoted_rs_alias |
281 | $order_by_requested |
15827712 |
282 | SQL |
b1e1d073 |
283 | |
284 | } |
285 | |
ac93965c |
286 | $sql =~ s/\s*\n\s*/ /g; # parsing out multiline statements is harder than a single line |
b1e1d073 |
287 | return $sql; |
15827712 |
288 | } |
289 | |
42e5b103 |
290 | # action at a distance to shorten Top code above |
291 | sub __record_alias { |
292 | my ($self, $register, $alias, $fqcol, $col) = @_; |
293 | |
294 | # record qualified name |
295 | $register->{$fqcol} = $alias; |
296 | $register->{$self->_quote($fqcol)} = $alias; |
297 | |
298 | return unless $col; |
299 | |
b6d347e0 |
300 | # record unqualified name, undef (no adjustment) if a duplicate is found |
42e5b103 |
301 | if (exists $register->{$col}) { |
302 | $register->{$col} = undef; |
303 | } |
304 | else { |
305 | $register->{$col} = $alias; |
306 | } |
307 | |
308 | $register->{$self->_quote($col)} = $register->{$col}; |
15827712 |
309 | } |
310 | |
311 | |
6f4ddea1 |
312 | |
313 | # While we're at it, this should make LIMIT queries more efficient, |
314 | # without digging into things too deeply |
6f4ddea1 |
315 | sub _find_syntax { |
316 | my ($self, $syntax) = @_; |
ac788c46 |
317 | return $self->{_cached_syntax} ||= $self->SUPER::_find_syntax($syntax); |
6f4ddea1 |
318 | } |
319 | |
ec7cfd36 |
320 | my $for_syntax = { |
321 | update => 'FOR UPDATE', |
322 | shared => 'FOR SHARE', |
323 | }; |
998373c2 |
324 | # Quotes table names, handles "limit" dialects (e.g. where rownum between x and |
325 | # y), supports SELECT ... FOR UPDATE and SELECT ... FOR SHARE. |
6f4ddea1 |
326 | sub select { |
327 | my ($self, $table, $fields, $where, $order, @rest) = @_; |
1cbd3034 |
328 | |
329 | $self->{"${_}_bind"} = [] for (qw/having from order/); |
db56cf3d |
330 | |
c2b7c5dc |
331 | if (not ref($table) or ref($table) eq 'SCALAR') { |
6f4ddea1 |
332 | $table = $self->_quote($table); |
333 | } |
c2b7c5dc |
334 | |
6f4ddea1 |
335 | local $self->{rownum_hack_count} = 1 |
336 | if (defined $rest[0] && $self->{limit_dialect} eq 'RowNum'); |
337 | @rest = (-1) unless defined $rest[0]; |
e8fcf76f |
338 | croak "LIMIT 0 Does Not Compute" if $rest[0] == 0; |
6f4ddea1 |
339 | # and anyway, SQL::Abstract::Limit will cause a barf if we don't first |
db56cf3d |
340 | my ($sql, @where_bind) = $self->SUPER::select( |
6f4ddea1 |
341 | $table, $self->_recurse_fields($fields), $where, $order, @rest |
342 | ); |
ec7cfd36 |
343 | if (my $for = delete $self->{_dbic_rs_attrs}{for}) { |
344 | $sql .= " $for_syntax->{$for}" if $for_syntax->{$for}; |
345 | } |
346 | |
1cbd3034 |
347 | return wantarray ? ($sql, @{$self->{from_bind}}, @where_bind, @{$self->{having_bind}}, @{$self->{order_bind}} ) : $sql; |
6f4ddea1 |
348 | } |
349 | |
998373c2 |
350 | # Quotes table names, and handles default inserts |
6f4ddea1 |
351 | sub insert { |
352 | my $self = shift; |
353 | my $table = shift; |
c2b7c5dc |
354 | $table = $self->_quote($table); |
7a72e5a5 |
355 | |
356 | # SQLA will emit INSERT INTO $table ( ) VALUES ( ) |
357 | # which is sadly understood only by MySQL. Change default behavior here, |
358 | # until SQLA2 comes with proper dialect support |
359 | if (! $_[0] or (ref $_[0] eq 'HASH' and !keys %{$_[0]} ) ) { |
360 | return "INSERT INTO ${table} DEFAULT VALUES" |
361 | } |
362 | |
6f4ddea1 |
363 | $self->SUPER::insert($table, @_); |
364 | } |
365 | |
998373c2 |
366 | # Just quotes table names. |
6f4ddea1 |
367 | sub update { |
368 | my $self = shift; |
369 | my $table = shift; |
c2b7c5dc |
370 | $table = $self->_quote($table); |
6f4ddea1 |
371 | $self->SUPER::update($table, @_); |
372 | } |
373 | |
998373c2 |
374 | # Just quotes table names. |
6f4ddea1 |
375 | sub delete { |
376 | my $self = shift; |
377 | my $table = shift; |
c2b7c5dc |
378 | $table = $self->_quote($table); |
6f4ddea1 |
379 | $self->SUPER::delete($table, @_); |
380 | } |
381 | |
382 | sub _emulate_limit { |
383 | my $self = shift; |
384 | if ($_[3] == -1) { |
385 | return $_[1].$self->_order_by($_[2]); |
386 | } else { |
387 | return $self->SUPER::_emulate_limit(@_); |
388 | } |
389 | } |
390 | |
391 | sub _recurse_fields { |
392 | my ($self, $fields, $params) = @_; |
393 | my $ref = ref $fields; |
394 | return $self->_quote($fields) unless $ref; |
395 | return $$fields if $ref eq 'SCALAR'; |
396 | |
397 | if ($ref eq 'ARRAY') { |
398 | return join(', ', map { |
399 | $self->_recurse_fields($_) |
400 | .(exists $self->{rownum_hack_count} && !($params && $params->{no_rownum_hack}) |
401 | ? ' AS col'.$self->{rownum_hack_count}++ |
402 | : '') |
403 | } @$fields); |
83e09b5b |
404 | } |
405 | elsif ($ref eq 'HASH') { |
406 | my %hash = %$fields; |
407 | my ($select, $as); |
408 | |
409 | if ($hash{-select}) { |
410 | $select = $self->_recurse_fields (delete $hash{-select}); |
411 | $as = $self->_quote (delete $hash{-as}); |
412 | } |
413 | else { |
414 | my ($func, $args) = each %hash; |
415 | delete $hash{$func}; |
416 | |
417 | if (lc ($func) eq 'distinct' && ref $args eq 'ARRAY' && @$args > 1) { |
418 | croak ( |
419 | 'The select => { distinct => ... } syntax is not supported for multiple columns.' |
420 | .' Instead please use { group_by => [ qw/' . (join ' ', @$args) . '/ ] }' |
421 | .' or { select => [ qw/' . (join ' ', @$args) . '/ ], distinct => 1 }' |
422 | ); |
db56cf3d |
423 | } |
83e09b5b |
424 | $select = sprintf ('%s( %s )', |
425 | $self->_sqlcase($func), |
426 | $self->_recurse_fields($args) |
427 | ); |
6f4ddea1 |
428 | } |
83e09b5b |
429 | |
430 | # there should be nothing left |
431 | if (keys %hash) { |
432 | croak "Malformed select argument - too many keys in hash: " . join (',', keys %$fields ); |
6f4ddea1 |
433 | } |
83e09b5b |
434 | |
435 | $select .= " AS $as" if $as; |
436 | return $select; |
6f4ddea1 |
437 | } |
438 | # Is the second check absolutely necessary? |
439 | elsif ( $ref eq 'REF' and ref($$fields) eq 'ARRAY' ) { |
db56cf3d |
440 | return $self->_fold_sqlbind( $fields ); |
6f4ddea1 |
441 | } |
442 | else { |
e8fcf76f |
443 | croak($ref . qq{ unexpected in _recurse_fields()}) |
6f4ddea1 |
444 | } |
445 | } |
446 | |
447 | sub _order_by { |
1cbd3034 |
448 | my ($self, $arg) = @_; |
15827712 |
449 | |
1cbd3034 |
450 | if (ref $arg eq 'HASH' and keys %$arg and not grep { $_ =~ /^-(?:desc|asc)/i } keys %$arg ) { |
451 | |
452 | my $ret = ''; |
453 | |
83e09b5b |
454 | if (my $g = $self->_recurse_fields($arg->{group_by}, { no_rownum_hack => 1 }) ) { |
455 | $ret = $self->_sqlcase(' group by ') . $g; |
6f4ddea1 |
456 | } |
15827712 |
457 | |
1cbd3034 |
458 | if (defined $arg->{having}) { |
459 | my ($frag, @bind) = $self->_recurse_where($arg->{having}); |
460 | push(@{$self->{having_bind}}, @bind); |
6f4ddea1 |
461 | $ret .= $self->_sqlcase(' having ').$frag; |
462 | } |
15827712 |
463 | |
1cbd3034 |
464 | if (defined $arg->{order_by}) { |
465 | my ($frag, @bind) = $self->SUPER::_order_by($arg->{order_by}); |
466 | push(@{$self->{order_bind}}, @bind); |
467 | $ret .= $frag; |
6f4ddea1 |
468 | } |
15827712 |
469 | |
1cbd3034 |
470 | return $ret; |
fde3719a |
471 | } |
1cbd3034 |
472 | else { |
473 | my ($sql, @bind) = $self->SUPER::_order_by ($arg); |
474 | push(@{$self->{order_bind}}, @bind); |
475 | return $sql; |
fd4cb60a |
476 | } |
6f4ddea1 |
477 | } |
478 | |
1cbd3034 |
479 | sub _order_directions { |
fd4cb60a |
480 | my ($self, $order) = @_; |
15827712 |
481 | |
1cbd3034 |
482 | # strip bind values - none of the current _order_directions users support them |
483 | return $self->SUPER::_order_directions( [ map |
484 | { ref $_ ? $_->[0] : $_ } |
485 | $self->_order_by_chunks ($order) |
486 | ]); |
fd4cb60a |
487 | } |
488 | |
6f4ddea1 |
489 | sub _table { |
490 | my ($self, $from) = @_; |
491 | if (ref $from eq 'ARRAY') { |
492 | return $self->_recurse_from(@$from); |
493 | } elsif (ref $from eq 'HASH') { |
494 | return $self->_make_as($from); |
495 | } else { |
496 | return $from; # would love to quote here but _table ends up getting called |
497 | # twice during an ->select without a limit clause due to |
498 | # the way S::A::Limit->select works. should maybe consider |
499 | # bypassing this and doing S::A::select($self, ...) in |
500 | # our select method above. meantime, quoting shims have |
501 | # been added to select/insert/update/delete here |
502 | } |
503 | } |
504 | |
505 | sub _recurse_from { |
506 | my ($self, $from, @join) = @_; |
507 | my @sqlf; |
508 | push(@sqlf, $self->_make_as($from)); |
509 | foreach my $j (@join) { |
510 | my ($to, $on) = @$j; |
511 | |
512 | # check whether a join type exists |
513 | my $join_clause = ''; |
514 | my $to_jt = ref($to) eq 'ARRAY' ? $to->[0] : $to; |
515 | if (ref($to_jt) eq 'HASH' and exists($to_jt->{-join_type})) { |
516 | $join_clause = ' '.uc($to_jt->{-join_type}).' JOIN '; |
517 | } else { |
518 | $join_clause = ' JOIN '; |
519 | } |
520 | push(@sqlf, $join_clause); |
521 | |
522 | if (ref $to eq 'ARRAY') { |
523 | push(@sqlf, '(', $self->_recurse_from(@$to), ')'); |
524 | } else { |
525 | push(@sqlf, $self->_make_as($to)); |
526 | } |
527 | push(@sqlf, ' ON ', $self->_join_condition($on)); |
528 | } |
529 | return join('', @sqlf); |
530 | } |
531 | |
db56cf3d |
532 | sub _fold_sqlbind { |
533 | my ($self, $sqlbind) = @_; |
69989ea9 |
534 | |
535 | my @sqlbind = @$$sqlbind; # copy |
536 | my $sql = shift @sqlbind; |
537 | push @{$self->{from_bind}}, @sqlbind; |
538 | |
db56cf3d |
539 | return $sql; |
6f4ddea1 |
540 | } |
541 | |
542 | sub _make_as { |
543 | my ($self, $from) = @_; |
db56cf3d |
544 | return join(' ', map { (ref $_ eq 'SCALAR' ? $$_ |
545 | : ref $_ eq 'REF' ? $self->_fold_sqlbind($_) |
546 | : $self->_quote($_)) |
6f4ddea1 |
547 | } reverse each %{$self->_skip_options($from)}); |
548 | } |
549 | |
550 | sub _skip_options { |
551 | my ($self, $hash) = @_; |
552 | my $clean_hash = {}; |
553 | $clean_hash->{$_} = $hash->{$_} |
554 | for grep {!/^-/} keys %$hash; |
555 | return $clean_hash; |
556 | } |
557 | |
558 | sub _join_condition { |
559 | my ($self, $cond) = @_; |
560 | if (ref $cond eq 'HASH') { |
561 | my %j; |
562 | for (keys %$cond) { |
563 | my $v = $cond->{$_}; |
564 | if (ref $v) { |
e8fcf76f |
565 | croak (ref($v) . qq{ reference arguments are not supported in JOINS - try using \"..." instead'}) |
6f4ddea1 |
566 | if ref($v) ne 'SCALAR'; |
567 | $j{$_} = $v; |
568 | } |
569 | else { |
570 | my $x = '= '.$self->_quote($v); $j{$_} = \$x; |
571 | } |
572 | }; |
573 | return scalar($self->_recurse_where(\%j)); |
574 | } elsif (ref $cond eq 'ARRAY') { |
575 | return join(' OR ', map { $self->_join_condition($_) } @$cond); |
576 | } else { |
577 | die "Can't handle this yet!"; |
578 | } |
579 | } |
580 | |
581 | sub _quote { |
582 | my ($self, $label) = @_; |
583 | return '' unless defined $label; |
c2b7c5dc |
584 | return $$label if ref($label) eq 'SCALAR'; |
6f4ddea1 |
585 | return "*" if $label eq '*'; |
586 | return $label unless $self->{quote_char}; |
587 | if(ref $self->{quote_char} eq "ARRAY"){ |
588 | return $self->{quote_char}->[0] . $label . $self->{quote_char}->[1] |
589 | if !defined $self->{name_sep}; |
590 | my $sep = $self->{name_sep}; |
591 | return join($self->{name_sep}, |
592 | map { $self->{quote_char}->[0] . $_ . $self->{quote_char}->[1] } |
593 | split(/\Q$sep\E/,$label)); |
594 | } |
595 | return $self->SUPER::_quote($label); |
596 | } |
597 | |
598 | sub limit_dialect { |
599 | my $self = shift; |
600 | $self->{limit_dialect} = shift if @_; |
601 | return $self->{limit_dialect}; |
602 | } |
603 | |
998373c2 |
604 | # Set to an array-ref to specify separate left and right quotes for table names. |
605 | # A single scalar is equivalen to [ $char, $char ] |
6f4ddea1 |
606 | sub quote_char { |
607 | my $self = shift; |
608 | $self->{quote_char} = shift if @_; |
609 | return $self->{quote_char}; |
610 | } |
611 | |
998373c2 |
612 | # Character separating quoted table names. |
6f4ddea1 |
613 | sub name_sep { |
614 | my $self = shift; |
615 | $self->{name_sep} = shift if @_; |
616 | return $self->{name_sep}; |
617 | } |
618 | |
619 | 1; |