Commit | Line | Data |
a82e41dc |
1 | package SQL::Abstract::Converter; |
2 | |
3 | use Carp (); |
4 | use List::Util (); |
5 | use Scalar::Util (); |
6 | use Data::Query::Constants qw( |
7 | DQ_IDENTIFIER DQ_OPERATOR DQ_VALUE DQ_LITERAL DQ_JOIN DQ_SELECT DQ_ORDER |
8 | DQ_WHERE DQ_DELETE DQ_UPDATE DQ_INSERT |
9 | ); |
10 | use Data::Query::ExprHelpers qw(perl_scalar_value); |
11 | use Moo; |
8b9b83ae |
12 | use namespace::clean; |
a82e41dc |
13 | |
14 | has renderer_will_quote => ( |
15 | is => 'ro' |
16 | ); |
17 | |
18 | has lower_case => ( |
19 | is => 'ro' |
20 | ); |
21 | |
22 | has default_logic => ( |
23 | is => 'ro', coerce => sub { uc($_[0]) }, default => sub { 'OR' } |
24 | ); |
25 | |
26 | has bind_meta => ( |
27 | is => 'ro', default => sub { 1 } |
28 | ); |
29 | |
30 | has cmp => (is => 'ro', default => sub { '=' }); |
31 | |
32 | has sqltrue => (is => 'ro', default => sub { '1=1' }); |
33 | has sqlfalse => (is => 'ro', default => sub { '0=1' }); |
34 | |
35 | has special_ops => (is => 'ro', default => sub { [] }); |
36 | |
37 | # XXX documented but I don't current fail any tests not using it |
38 | has unary_ops => (is => 'ro', default => sub { [] }); |
39 | |
40 | has injection_guard => ( |
41 | is => 'ro', |
42 | default => sub { |
43 | qr/ |
44 | \; |
45 | | |
46 | ^ \s* go \s |
47 | /xmi; |
48 | } |
49 | ); |
50 | |
51 | has identifier_sep => ( |
52 | is => 'ro', default => sub { '.' }, |
53 | ); |
54 | |
55 | has always_quote => (is => 'ro', default => sub { 1 }); |
56 | |
57 | has convert => (is => 'ro'); |
58 | |
59 | has array_datatypes => (is => 'ro'); |
60 | |
61 | sub _literal_to_dq { |
62 | my ($self, $literal) = @_; |
63 | my @bind; |
64 | ($literal, @bind) = @$literal if ref($literal) eq 'ARRAY'; |
65 | +{ |
66 | type => DQ_LITERAL, |
67 | subtype => 'SQL', |
68 | literal => $literal, |
69 | (@bind ? (values => [ $self->_bind_to_dq(@bind) ]) : ()), |
70 | }; |
71 | } |
72 | |
73 | sub _bind_to_dq { |
74 | my ($self, @bind) = @_; |
75 | return unless @bind; |
76 | $self->bind_meta |
77 | ? do { |
78 | $self->_assert_bindval_matches_bindtype(@bind); |
79 | map perl_scalar_value(reverse @$_), @bind |
80 | } |
81 | : map perl_scalar_value($_), @bind |
82 | } |
83 | |
84 | sub _value_to_dq { |
85 | my ($self, $value) = @_; |
86 | $self->_maybe_convert_dq(perl_scalar_value($value, our $Cur_Col_Meta)); |
87 | } |
88 | |
89 | sub _ident_to_dq { |
90 | my ($self, $ident) = @_; |
91 | $self->_assert_pass_injection_guard($ident) |
92 | unless $self->renderer_will_quote; |
93 | $self->_maybe_convert_dq({ |
94 | type => DQ_IDENTIFIER, |
95 | elements => [ split /\Q${\$self->identifier_sep}/, $ident ], |
96 | }); |
97 | } |
98 | |
99 | sub _maybe_convert_dq { |
100 | my ($self, $dq) = @_; |
101 | if (my $c = $self->{where_convert}) { |
102 | +{ |
103 | type => DQ_OPERATOR, |
104 | operator => { 'SQL.Naive' => 'apply' }, |
105 | args => [ |
106 | { type => DQ_IDENTIFIER, elements => [ $self->_sqlcase($c) ] }, |
107 | $dq |
108 | ] |
109 | }; |
110 | } else { |
111 | $dq; |
112 | } |
113 | } |
114 | |
115 | sub _op_to_dq { |
116 | my ($self, $op, @args) = @_; |
117 | $self->_assert_pass_injection_guard($op); |
118 | +{ |
119 | type => DQ_OPERATOR, |
120 | operator => { 'SQL.Naive' => $op }, |
121 | args => \@args |
122 | }; |
123 | } |
124 | |
125 | sub _assert_pass_injection_guard { |
126 | if ($_[1] =~ $_[0]->{injection_guard}) { |
127 | my $class = ref $_[0]; |
128 | die "Possible SQL injection attempt '$_[1]'. If this is indeed a part of the " |
129 | . "desired SQL use literal SQL ( \'...' or \[ '...' ] ) or supply your own " |
130 | . "{injection_guard} attribute to ${class}->new()" |
131 | } |
132 | } |
133 | |
134 | sub _insert_to_dq { |
135 | my ($self, $table, $data, $options) = @_; |
136 | my (@names, @values); |
137 | if (ref($data) eq 'HASH') { |
138 | @names = sort keys %$data; |
139 | foreach my $k (@names) { |
140 | local our $Cur_Col_Meta = $k; |
141 | push @values, $self->_mutation_rhs_to_dq($data->{$k}); |
142 | } |
143 | } elsif (ref($data) eq 'ARRAY') { |
144 | local our $Cur_Col_Meta; |
145 | @values = map $self->_mutation_rhs_to_dq($_), @$data; |
146 | } else { |
147 | die "Not handled yet"; |
148 | } |
149 | my $returning; |
150 | if (my $r_source = $options->{returning}) { |
151 | $returning = [ |
152 | map +(ref($_) ? $self->_expr_to_dq($_) : $self->_ident_to_dq($_)), |
153 | (ref($r_source) eq 'ARRAY' ? @$r_source : $r_source), |
154 | ]; |
155 | } |
156 | +{ |
157 | type => DQ_INSERT, |
158 | target => $self->_table_to_dq($table), |
159 | (@names ? (names => [ map $self->_ident_to_dq($_), @names ]) : ()), |
160 | values => [ \@values ], |
161 | ($returning ? (returning => $returning) : ()), |
162 | }; |
163 | } |
164 | |
165 | sub _mutation_rhs_to_dq { |
166 | my ($self, $v) = @_; |
167 | if (ref($v) eq 'ARRAY') { |
168 | if ($self->{array_datatypes}) { |
169 | return $self->_value_to_dq($v); |
170 | } |
171 | $v = \do { my $x = $v }; |
172 | } |
173 | if (ref($v) eq 'HASH') { |
174 | my ($op, $arg, @rest) = %$v; |
175 | |
176 | die 'Operator calls in update/insert must be in the form { -op => $arg }' |
177 | if (@rest or not $op =~ /^\-(.+)/); |
178 | } |
179 | return $self->_expr_to_dq($v); |
180 | } |
181 | |
182 | sub _update_to_dq { |
183 | my ($self, $table, $data, $where) = @_; |
184 | |
185 | die "Unsupported data type specified to \$sql->update" |
186 | unless ref $data eq 'HASH'; |
187 | |
188 | my @set; |
189 | |
190 | foreach my $k (sort keys %$data) { |
191 | my $v = $data->{$k}; |
192 | local our $Cur_Col_Meta = $k; |
193 | push @set, [ $self->_ident_to_dq($k), $self->_mutation_rhs_to_dq($v) ]; |
194 | } |
195 | |
196 | return +{ |
197 | type => DQ_UPDATE, |
198 | target => $self->_table_to_dq($table), |
199 | set => \@set, |
200 | where => $self->_where_to_dq($where), |
201 | }; |
202 | } |
203 | |
204 | sub _source_to_dq { |
205 | my ($self, $table, undef, $where) = @_; |
206 | |
207 | my $source_dq = $self->_table_to_dq($table); |
208 | |
209 | if (my $where_dq = $self->_where_to_dq($where)) { |
210 | $source_dq = { |
211 | type => DQ_WHERE, |
212 | from => $source_dq, |
213 | where => $where_dq, |
214 | }; |
215 | } |
216 | |
217 | $source_dq; |
218 | } |
219 | |
220 | sub _select_to_dq { |
221 | my $self = shift; |
222 | my ($table, $fields, $where, $order) = @_; |
223 | |
224 | my $source_dq = $self->_source_to_dq(@_); |
225 | |
226 | my $ordered_dq = do { |
227 | if ($order) { |
228 | $self->_order_by_to_dq($order, undef, $source_dq); |
229 | } else { |
230 | $source_dq |
231 | } |
232 | }; |
233 | |
87af4204 |
234 | return $self->_select_select_to_dq($fields, $ordered_dq); |
a82e41dc |
235 | } |
236 | |
87af4204 |
237 | sub _select_select_to_dq { |
a82e41dc |
238 | my ($self, $fields, $from_dq) = @_; |
239 | |
240 | $fields ||= '*'; |
241 | |
242 | return +{ |
243 | type => DQ_SELECT, |
87af4204 |
244 | select => $self->_select_field_list_to_dq($fields), |
a82e41dc |
245 | from => $from_dq, |
246 | }; |
247 | } |
248 | |
249 | sub _select_field_list_to_dq { |
250 | my ($self, $fields) = @_; |
87af4204 |
251 | [ map $self->_select_field_to_dq($_), |
252 | ref($fields) eq 'ARRAY' ? @$fields : $fields ]; |
a82e41dc |
253 | } |
254 | |
255 | sub _select_field_to_dq { |
256 | my ($self, $field) = @_; |
87af4204 |
257 | if (my $ref = ref($field)) { |
258 | if ($ref eq 'REF' and ref($$field) eq 'HASH') { |
259 | return $$field; |
260 | } else { |
261 | return $self->_literal_to_dq($$field); |
262 | } |
263 | } |
264 | return $self->_ident_to_dq($field) |
a82e41dc |
265 | } |
266 | |
267 | sub _delete_to_dq { |
268 | my ($self, $table, $where) = @_; |
269 | +{ |
270 | type => DQ_DELETE, |
271 | target => $self->_table_to_dq($table), |
272 | where => $self->_where_to_dq($where), |
273 | } |
274 | } |
275 | |
276 | sub _where_to_dq { |
277 | my ($self, $where, $logic) = @_; |
278 | |
279 | return undef unless defined($where); |
280 | |
e177c256 |
281 | # if we're given a simple string assume it's a literal |
282 | return $self->_literal_to_dq($where) if !ref($where); |
283 | |
a82e41dc |
284 | # turn the convert misfeature on - only used in WHERE clauses |
285 | local $self->{where_convert} = $self->convert; |
286 | |
287 | return $self->_expr_to_dq($where, $logic); |
288 | } |
289 | |
290 | sub _expr_to_dq { |
291 | my ($self, $where, $logic) = @_; |
292 | |
293 | if (ref($where) eq 'ARRAY') { |
294 | return $self->_expr_to_dq_ARRAYREF($where, $logic); |
295 | } elsif (ref($where) eq 'HASH') { |
296 | return $self->_expr_to_dq_HASHREF($where, $logic); |
297 | } elsif ( |
298 | ref($where) eq 'SCALAR' |
299 | or (ref($where) eq 'REF' and ref($$where) eq 'ARRAY') |
300 | ) { |
301 | return $self->_literal_to_dq($$where); |
62d17764 |
302 | } elsif (ref($where) eq 'REF' and ref($$where) eq 'HASH') { |
303 | return $$where; |
a82e41dc |
304 | } elsif (!ref($where) or Scalar::Util::blessed($where)) { |
305 | return $self->_value_to_dq($where); |
306 | } |
307 | die "Can't handle $where"; |
308 | } |
309 | |
310 | sub _expr_to_dq_ARRAYREF { |
311 | my ($self, $where, $logic) = @_; |
312 | |
313 | $logic = uc($logic || $self->default_logic || 'OR'); |
314 | $logic eq 'AND' or $logic eq 'OR' or die "unknown logic: $logic"; |
315 | |
316 | return unless @$where; |
317 | |
318 | my ($first, @rest) = @$where; |
319 | |
320 | return $self->_expr_to_dq($first) unless @rest; |
321 | |
322 | my $first_dq = do { |
323 | if (!ref($first)) { |
324 | $self->_where_hashpair_to_dq($first => shift(@rest)); |
325 | } else { |
326 | $self->_expr_to_dq($first); |
327 | } |
328 | }; |
329 | |
330 | return $self->_expr_to_dq_ARRAYREF(\@rest, $logic) unless $first_dq; |
331 | |
332 | $self->_op_to_dq( |
333 | $logic, $first_dq, $self->_expr_to_dq_ARRAYREF(\@rest, $logic) |
334 | ); |
335 | } |
336 | |
337 | sub _expr_to_dq_HASHREF { |
338 | my ($self, $where, $logic) = @_; |
339 | |
340 | $logic = uc($logic) if $logic; |
341 | |
342 | my @dq = map { |
343 | $self->_where_hashpair_to_dq($_ => $where->{$_}, $logic) |
344 | } sort keys %$where; |
345 | |
346 | return $dq[0] unless @dq > 1; |
347 | |
348 | my $final = pop(@dq); |
349 | |
350 | foreach my $dq (reverse @dq) { |
351 | $final = $self->_op_to_dq($logic||'AND', $dq, $final); |
352 | } |
353 | |
354 | return $final; |
355 | } |
356 | |
357 | sub _where_to_dq_SCALAR { |
358 | shift->_value_to_dq(@_); |
359 | } |
360 | |
361 | sub _apply_to_dq { |
362 | my ($self, $op, $v) = @_; |
363 | my @args = map $self->_expr_to_dq($_), (ref($v) eq 'ARRAY' ? @$v : $v); |
364 | |
365 | # Ok. Welcome to stupid compat code land. An SQLA expr that would in the |
366 | # absence of this piece of crazy render to: |
367 | # |
368 | # A( B( C( x ) ) ) |
369 | # |
370 | # such as |
371 | # |
372 | # { -a => { -b => { -c => $x } } } |
373 | # |
374 | # actually needs to render to: |
375 | # |
376 | # A( B( C x ) ) |
377 | # |
378 | # because SQL sucks, and databases are hateful, and SQLA is Just That DWIM. |
379 | # |
380 | # However, we don't want to catch 'A(x)' and turn it into 'A x' |
381 | # |
382 | # So the way we deal with this is to go through all our arguments, and |
383 | # then if the argument is -also- an apply, i.e. at least 'B', we check |
384 | # its arguments - and if there's only one of them, and that isn't an apply, |
385 | # then we convert to the bareword form. The end result should be: |
386 | # |
387 | # A( x ) -> A( x ) |
388 | # A( B( x ) ) -> A( B x ) |
389 | # A( B( C( x ) ) ) -> A( B( C x ) ) |
390 | # A( B( x + y ) ) -> A( B( x + y ) ) |
391 | # A( B( x, y ) ) -> A( B( x, y ) ) |
392 | # |
393 | # If this turns out not to be quite right, please add additional tests |
394 | # to either 01generate.t or 02where.t *and* update this comment. |
395 | |
396 | foreach my $arg (@args) { |
397 | if ( |
398 | $arg->{type} eq DQ_OPERATOR and $arg->{operator}{'SQL.Naive'} eq 'apply' |
399 | and @{$arg->{args}} == 2 and $arg->{args}[1]{type} ne DQ_OPERATOR |
400 | ) { |
401 | $arg->{operator}{'SQL.Naive'} = (shift @{$arg->{args}})->{elements}->[0]; |
402 | } |
403 | } |
404 | $self->_assert_pass_injection_guard($op); |
405 | return $self->_op_to_dq( |
406 | apply => $self->_ident_to_dq($op), @args |
407 | ); |
408 | } |
409 | |
410 | sub _where_hashpair_to_dq { |
411 | my ($self, $k, $v, $logic) = @_; |
412 | |
413 | if ($k =~ /^-(.*)/s) { |
414 | my $op = uc($1); |
415 | if ($op eq 'AND' or $op eq 'OR') { |
416 | return $self->_expr_to_dq($v, $op); |
417 | } elsif ($op eq 'NEST') { |
418 | return $self->_expr_to_dq($v); |
419 | } elsif ($op eq 'NOT') { |
420 | return $self->_op_to_dq(NOT => $self->_expr_to_dq($v)); |
421 | } elsif ($op eq 'BOOL') { |
422 | return ref($v) ? $self->_expr_to_dq($v) : $self->_ident_to_dq($v); |
423 | } elsif ($op eq 'NOT_BOOL') { |
424 | return $self->_op_to_dq( |
425 | NOT => ref($v) ? $self->_expr_to_dq($v) : $self->_ident_to_dq($v) |
426 | ); |
427 | } elsif ($op eq 'IDENT') { |
428 | return $self->_ident_to_dq($v); |
429 | } elsif ($op eq 'VALUE') { |
430 | return $self->_value_to_dq($v); |
431 | } elsif ($op =~ /^(?:AND|OR|NEST)_?\d+/) { |
432 | die "Use of [and|or|nest]_N modifiers is no longer supported"; |
433 | } else { |
434 | return $self->_apply_to_dq($op, $v); |
435 | } |
436 | } else { |
437 | local our $Cur_Col_Meta = $k; |
438 | if (ref($v) eq 'ARRAY') { |
439 | if (!@$v) { |
440 | return $self->_literal_to_dq($self->{sqlfalse}); |
441 | } elsif (defined($v->[0]) && $v->[0] =~ /-(and|or)/i) { |
442 | return $self->_expr_to_dq_ARRAYREF([ |
443 | map +{ $k => $_ }, @{$v}[1..$#$v] |
444 | ], uc($1)); |
445 | } |
446 | return $self->_expr_to_dq_ARRAYREF([ |
447 | map +{ $k => $_ }, @$v |
448 | ], $logic); |
449 | } elsif (ref($v) eq 'SCALAR' or (ref($v) eq 'REF' and ref($$v) eq 'ARRAY')) { |
450 | return +{ |
451 | type => DQ_LITERAL, |
452 | subtype => 'SQL', |
453 | parts => [ $self->_ident_to_dq($k), $self->_literal_to_dq($$v) ] |
454 | }; |
455 | } |
456 | my ($op, $rhs) = do { |
457 | if (ref($v) eq 'HASH') { |
458 | if (keys %$v > 1) { |
459 | return $self->_expr_to_dq_ARRAYREF([ |
460 | map +{ $k => { $_ => $v->{$_} } }, sort keys %$v |
461 | ], $logic||'AND'); |
462 | } |
463 | my ($op, $value) = %$v; |
464 | s/^-//, s/_/ /g for $op; |
465 | if ($op =~ /^(and|or)$/i) { |
466 | return $self->_expr_to_dq({ $k => $value }, $op); |
467 | } elsif ( |
468 | my $special_op = List::Util::first {$op =~ $_->{regex}} |
469 | @{$self->{special_ops}} |
470 | ) { |
471 | return $self->_literal_to_dq( |
472 | [ $special_op->{handler}->($k, $op, $value) ] |
473 | );; |
474 | } elsif ($op =~ /^(?:AND|OR|NEST)_?\d+$/i) { |
475 | die "Use of [and|or|nest]_N modifiers is no longer supported"; |
476 | } |
477 | (uc($op), $value); |
478 | } else { |
479 | ($self->{cmp}, $v); |
480 | } |
481 | }; |
482 | if ($op eq 'BETWEEN' or $op eq 'IN' or $op eq 'NOT IN' or $op eq 'NOT BETWEEN') { |
483 | if (ref($rhs) ne 'ARRAY') { |
484 | if ($op =~ /IN$/) { |
485 | # have to add parens if none present because -in => \"SELECT ..." |
486 | # got documented. mst hates everything. |
487 | if (ref($rhs) eq 'SCALAR') { |
488 | my $x = $$rhs; |
489 | 1 while ($x =~ s/\A\s*\((.*)\)\s*\Z/$1/s); |
490 | $rhs = \$x; |
491 | } else { |
492 | my ($x, @rest) = @{$$rhs}; |
493 | 1 while ($x =~ s/\A\s*\((.*)\)\s*\Z/$1/s); |
494 | $rhs = \[ $x, @rest ]; |
495 | } |
496 | } |
497 | return $self->_op_to_dq( |
498 | $op, $self->_ident_to_dq($k), $self->_literal_to_dq($$rhs) |
499 | ); |
500 | } |
501 | return $self->_literal_to_dq($self->{sqlfalse}) unless @$rhs; |
502 | return $self->_op_to_dq( |
503 | $op, $self->_ident_to_dq($k), map $self->_expr_to_dq($_), @$rhs |
504 | ) |
505 | } elsif ($op =~ s/^NOT (?!LIKE)//) { |
506 | return $self->_where_hashpair_to_dq(-not => { $k => { $op => $rhs } }); |
507 | } elsif ($op eq 'IDENT') { |
508 | return $self->_op_to_dq( |
509 | $self->{cmp}, $self->_ident_to_dq($k), $self->_ident_to_dq($rhs) |
510 | ); |
511 | } elsif ($op eq 'VALUE') { |
512 | return $self->_op_to_dq( |
513 | $self->{cmp}, $self->_ident_to_dq($k), $self->_value_to_dq($rhs) |
514 | ); |
515 | } elsif (!defined($rhs)) { |
516 | my $null_op = do { |
517 | if ($op eq '=' or $op eq 'LIKE') { |
518 | 'IS NULL' |
519 | } elsif ($op eq '!=') { |
520 | 'IS NOT NULL' |
521 | } else { |
522 | die "Can't do undef -> NULL transform for operator ${op}"; |
523 | } |
524 | }; |
525 | return $self->_op_to_dq($null_op, $self->_ident_to_dq($k)); |
526 | } |
527 | if (ref($rhs) eq 'ARRAY') { |
528 | if (!@$rhs) { |
529 | return $self->_literal_to_dq( |
530 | $op eq '!=' ? $self->{sqltrue} : $self->{sqlfalse} |
531 | ); |
532 | } elsif (defined($rhs->[0]) and $rhs->[0] =~ /^-(and|or)$/i) { |
533 | return $self->_expr_to_dq_ARRAYREF([ |
534 | map +{ $k => { $op => $_ } }, @{$rhs}[1..$#$rhs] |
535 | ], uc($1)); |
536 | } elsif ($op =~ /^-(?:AND|OR|NEST)_?\d+/) { |
537 | die "Use of [and|or|nest]_N modifiers is no longer supported"; |
538 | } |
539 | return $self->_expr_to_dq_ARRAYREF([ |
540 | map +{ $k => { $op => $_ } }, @$rhs |
541 | ]); |
542 | } |
543 | return $self->_op_to_dq( |
544 | $op, $self->_ident_to_dq($k), $self->_expr_to_dq($rhs) |
545 | ); |
546 | } |
547 | } |
548 | |
549 | sub _order_by_to_dq { |
550 | my ($self, $arg, $dir, $from) = @_; |
551 | |
552 | return unless $arg; |
553 | |
554 | my $dq = { |
555 | type => DQ_ORDER, |
3d82b6c9 |
556 | (defined($dir) ? (reverse => !!($dir =~ /desc/i)) : ()), |
a82e41dc |
557 | ($from ? (from => $from) : ()), |
558 | }; |
559 | |
560 | if (!ref($arg)) { |
561 | $dq->{by} = $self->_ident_to_dq($arg); |
562 | } elsif (ref($arg) eq 'ARRAY') { |
563 | return unless @$arg; |
564 | local our $Order_Inner unless our $Order_Recursing; |
565 | local $Order_Recursing = 1; |
566 | my ($outer, $inner); |
567 | foreach my $member (@$arg) { |
568 | local $Order_Inner; |
569 | my $next = $self->_order_by_to_dq($member, $dir, $from); |
570 | $outer ||= $next; |
571 | $inner->{from} = $next if $inner; |
572 | $inner = $Order_Inner || $next; |
573 | } |
574 | $Order_Inner = $inner; |
575 | return $outer; |
576 | } elsif (ref($arg) eq 'REF' and ref($$arg) eq 'ARRAY') { |
577 | $dq->{by} = $self->_literal_to_dq($$arg); |
578 | } elsif (ref($arg) eq 'SCALAR') { |
8b9b83ae |
579 | |
580 | # < mst> right, but if it doesn't match that, it goes "ok, right, not sure, |
581 | # totally leaving this untouched as a literal" |
582 | # < mst> so I -think- it's relatively robust |
583 | # < ribasushi> right, it's relatively safe then |
584 | # < ribasushi> is this regex centralized? |
585 | # < mst> it only exists in _order_by_to_dq in SQL::Abstract::Converter |
586 | # < mst> it only exists because you were kind enough to support new |
587 | # dbihacks crack combined with old literal order_by crack |
588 | # < ribasushi> heh :) |
589 | |
daf6f830 |
590 | if (my ($ident, $dir) = $$arg =~ /^(\w+)(?:\s+(desc|asc))?$/i) { |
3d82b6c9 |
591 | $dq->{by} = $self->_ident_to_dq($ident); |
592 | $dq->{reverse} = 1 if $dir and lc($dir) eq 'desc'; |
593 | } else { |
594 | $dq->{by} = $self->_literal_to_dq($$arg); |
595 | } |
a82e41dc |
596 | } elsif (ref($arg) eq 'HASH') { |
597 | my ($key, $val, @rest) = %$arg; |
598 | |
599 | return unless $key; |
600 | |
601 | if (@rest or not $key =~ /^-(desc|asc)/i) { |
602 | die "hash passed to _order_by must have exactly one key (-desc or -asc)"; |
603 | } |
604 | my $dir = uc $1; |
605 | return $self->_order_by_to_dq($val, $dir, $from); |
606 | } else { |
607 | die "Can't handle $arg in _order_by_to_dq"; |
608 | } |
609 | return $dq; |
610 | } |
611 | |
612 | sub _table_to_dq { |
613 | my ($self, $from) = @_; |
614 | if (ref($from) eq 'ARRAY') { |
615 | die "Empty FROM list" unless my @f = @$from; |
616 | my $dq = $self->_table_to_dq(shift @f); |
617 | while (my $x = shift @f) { |
618 | $dq = { |
619 | type => DQ_JOIN, |
31a41fd9 |
620 | left => $dq, |
621 | right => $self->_table_to_dq($x), |
a82e41dc |
622 | }; |
623 | } |
624 | $dq; |
625 | } elsif (ref($from) eq 'SCALAR' or (ref($from) eq 'REF')) { |
626 | $self->_literal_to_dq($$from); |
627 | } else { |
628 | $self->_ident_to_dq($from); |
629 | } |
630 | } |
631 | |
632 | # And bindtype |
633 | sub _bindtype (@) { |
634 | #my ($self, $col, @vals) = @_; |
635 | |
636 | #LDNOTE : changed original implementation below because it did not make |
637 | # sense when bindtype eq 'columns' and @vals > 1. |
638 | # return $self->{bindtype} eq 'columns' ? [ $col, @vals ] : @vals; |
639 | |
640 | # called often - tighten code |
641 | return $_[0]->bind_meta |
642 | ? map {[$_[1], $_]} @_[2 .. $#_] |
643 | : @_[2 .. $#_] |
644 | ; |
645 | } |
646 | |
647 | # Dies if any element of @bind is not in [colname => value] format |
648 | # if bindtype is 'columns'. |
649 | sub _assert_bindval_matches_bindtype { |
650 | # my ($self, @bind) = @_; |
651 | my $self = shift; |
652 | if ($self->bind_meta) { |
653 | for (@_) { |
654 | if (!defined $_ || ref($_) ne 'ARRAY' || @$_ != 2) { |
655 | die "bindtype 'columns' selected, you need to pass: [column_name => bind_value]" |
656 | } |
657 | } |
658 | } |
659 | } |
660 | |
661 | # Fix SQL case, if so requested |
662 | sub _sqlcase { |
663 | return $_[0]->lower_case ? $_[1] : uc($_[1]); |
664 | } |
665 | |
666 | 1; |