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 | ); |
4caa4620 |
10 | use Data::Query::ExprHelpers; |
a82e41dc |
11 | use Moo; |
8b9b83ae |
12 | use namespace::clean; |
a82e41dc |
13 | |
14 | has renderer_will_quote => ( |
15 | is => 'ro' |
16 | ); |
17 | |
18 | has lower_case => ( |
4caa4620 |
19 | is => 'ro' |
a82e41dc |
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 | +{ |
a82e41dc |
66 | subtype => 'SQL', |
4caa4620 |
67 | %{ Literal($literal, [ $self->_bind_to_dq(@bind) ]) } |
a82e41dc |
68 | }; |
69 | } |
70 | |
71 | sub _bind_to_dq { |
72 | my ($self, @bind) = @_; |
73 | return unless @bind; |
74 | $self->bind_meta |
75 | ? do { |
76 | $self->_assert_bindval_matches_bindtype(@bind); |
77 | map perl_scalar_value(reverse @$_), @bind |
78 | } |
79 | : map perl_scalar_value($_), @bind |
80 | } |
81 | |
82 | sub _value_to_dq { |
83 | my ($self, $value) = @_; |
84 | $self->_maybe_convert_dq(perl_scalar_value($value, our $Cur_Col_Meta)); |
85 | } |
86 | |
87 | sub _ident_to_dq { |
88 | my ($self, $ident) = @_; |
89 | $self->_assert_pass_injection_guard($ident) |
90 | unless $self->renderer_will_quote; |
4caa4620 |
91 | $self->_maybe_convert_dq(Identifier(split /\Q${\$self->identifier_sep}/, $ident)); |
a82e41dc |
92 | } |
93 | |
94 | sub _maybe_convert_dq { |
95 | my ($self, $dq) = @_; |
96 | if (my $c = $self->{where_convert}) { |
4caa4620 |
97 | Operator({ 'SQL.Naive' => 'apply' }, [ |
98 | { type => DQ_IDENTIFIER, elements => [ $self->_sqlcase($c) ] }, |
99 | $dq |
100 | ] |
101 | ); |
a82e41dc |
102 | } else { |
103 | $dq; |
104 | } |
105 | } |
106 | |
107 | sub _op_to_dq { |
108 | my ($self, $op, @args) = @_; |
109 | $self->_assert_pass_injection_guard($op); |
4caa4620 |
110 | Operator({ 'SQL.Naive' => $op }, \@args); |
a82e41dc |
111 | } |
112 | |
113 | sub _assert_pass_injection_guard { |
114 | if ($_[1] =~ $_[0]->{injection_guard}) { |
115 | my $class = ref $_[0]; |
116 | die "Possible SQL injection attempt '$_[1]'. If this is indeed a part of the " |
117 | . "desired SQL use literal SQL ( \'...' or \[ '...' ] ) or supply your own " |
118 | . "{injection_guard} attribute to ${class}->new()" |
119 | } |
120 | } |
121 | |
122 | sub _insert_to_dq { |
123 | my ($self, $table, $data, $options) = @_; |
124 | my (@names, @values); |
125 | if (ref($data) eq 'HASH') { |
126 | @names = sort keys %$data; |
127 | foreach my $k (@names) { |
128 | local our $Cur_Col_Meta = $k; |
129 | push @values, $self->_mutation_rhs_to_dq($data->{$k}); |
130 | } |
131 | } elsif (ref($data) eq 'ARRAY') { |
132 | local our $Cur_Col_Meta; |
133 | @values = map $self->_mutation_rhs_to_dq($_), @$data; |
134 | } else { |
135 | die "Not handled yet"; |
136 | } |
137 | my $returning; |
138 | if (my $r_source = $options->{returning}) { |
139 | $returning = [ |
140 | map +(ref($_) ? $self->_expr_to_dq($_) : $self->_ident_to_dq($_)), |
141 | (ref($r_source) eq 'ARRAY' ? @$r_source : $r_source), |
142 | ]; |
143 | } |
4caa4620 |
144 | Insert( |
145 | (@names ? ([ map $self->_ident_to_dq($_), @names ]) : undef), |
146 | [ \@values ], |
147 | $self->_table_to_dq($table), |
148 | ($returning ? ($returning) : undef), |
149 | ); |
a82e41dc |
150 | } |
151 | |
152 | sub _mutation_rhs_to_dq { |
153 | my ($self, $v) = @_; |
154 | if (ref($v) eq 'ARRAY') { |
155 | if ($self->{array_datatypes}) { |
156 | return $self->_value_to_dq($v); |
157 | } |
158 | $v = \do { my $x = $v }; |
159 | } |
160 | if (ref($v) eq 'HASH') { |
161 | my ($op, $arg, @rest) = %$v; |
162 | |
163 | die 'Operator calls in update/insert must be in the form { -op => $arg }' |
164 | if (@rest or not $op =~ /^\-(.+)/); |
165 | } |
166 | return $self->_expr_to_dq($v); |
167 | } |
168 | |
169 | sub _update_to_dq { |
170 | my ($self, $table, $data, $where) = @_; |
171 | |
172 | die "Unsupported data type specified to \$sql->update" |
173 | unless ref $data eq 'HASH'; |
174 | |
175 | my @set; |
176 | |
177 | foreach my $k (sort keys %$data) { |
178 | my $v = $data->{$k}; |
179 | local our $Cur_Col_Meta = $k; |
180 | push @set, [ $self->_ident_to_dq($k), $self->_mutation_rhs_to_dq($v) ]; |
181 | } |
182 | |
4caa4620 |
183 | Update( |
184 | \@set, |
185 | $self->_where_to_dq($where), |
186 | $self->_table_to_dq($table), |
187 | ); |
a82e41dc |
188 | } |
189 | |
190 | sub _source_to_dq { |
191 | my ($self, $table, undef, $where) = @_; |
192 | |
193 | my $source_dq = $self->_table_to_dq($table); |
194 | |
195 | if (my $where_dq = $self->_where_to_dq($where)) { |
4caa4620 |
196 | $source_dq = Where($where_dq, $source_dq); |
a82e41dc |
197 | } |
198 | |
199 | $source_dq; |
200 | } |
201 | |
202 | sub _select_to_dq { |
203 | my $self = shift; |
204 | my ($table, $fields, $where, $order) = @_; |
205 | |
206 | my $source_dq = $self->_source_to_dq(@_); |
207 | |
208 | my $ordered_dq = do { |
209 | if ($order) { |
210 | $self->_order_by_to_dq($order, undef, $source_dq); |
211 | } else { |
212 | $source_dq |
213 | } |
214 | }; |
215 | |
87af4204 |
216 | return $self->_select_select_to_dq($fields, $ordered_dq); |
a82e41dc |
217 | } |
218 | |
87af4204 |
219 | sub _select_select_to_dq { |
a82e41dc |
220 | my ($self, $fields, $from_dq) = @_; |
221 | |
222 | $fields ||= '*'; |
223 | |
4caa4620 |
224 | Select( |
225 | $self->_select_field_list_to_dq($fields), |
226 | $from_dq, |
227 | ); |
a82e41dc |
228 | } |
229 | |
230 | sub _select_field_list_to_dq { |
231 | my ($self, $fields) = @_; |
87af4204 |
232 | [ map $self->_select_field_to_dq($_), |
233 | ref($fields) eq 'ARRAY' ? @$fields : $fields ]; |
a82e41dc |
234 | } |
235 | |
236 | sub _select_field_to_dq { |
237 | my ($self, $field) = @_; |
87af4204 |
238 | if (my $ref = ref($field)) { |
239 | if ($ref eq 'REF' and ref($$field) eq 'HASH') { |
240 | return $$field; |
241 | } else { |
242 | return $self->_literal_to_dq($$field); |
243 | } |
244 | } |
245 | return $self->_ident_to_dq($field) |
a82e41dc |
246 | } |
247 | |
248 | sub _delete_to_dq { |
249 | my ($self, $table, $where) = @_; |
4caa4620 |
250 | Delete( |
251 | $self->_where_to_dq($where), |
252 | $self->_table_to_dq($table), |
253 | ); |
a82e41dc |
254 | } |
255 | |
256 | sub _where_to_dq { |
257 | my ($self, $where, $logic) = @_; |
258 | |
259 | return undef unless defined($where); |
260 | |
e177c256 |
261 | # if we're given a simple string assume it's a literal |
262 | return $self->_literal_to_dq($where) if !ref($where); |
263 | |
a82e41dc |
264 | # turn the convert misfeature on - only used in WHERE clauses |
265 | local $self->{where_convert} = $self->convert; |
266 | |
267 | return $self->_expr_to_dq($where, $logic); |
268 | } |
269 | |
270 | sub _expr_to_dq { |
271 | my ($self, $where, $logic) = @_; |
272 | |
273 | if (ref($where) eq 'ARRAY') { |
274 | return $self->_expr_to_dq_ARRAYREF($where, $logic); |
275 | } elsif (ref($where) eq 'HASH') { |
276 | return $self->_expr_to_dq_HASHREF($where, $logic); |
277 | } elsif ( |
278 | ref($where) eq 'SCALAR' |
279 | or (ref($where) eq 'REF' and ref($$where) eq 'ARRAY') |
280 | ) { |
281 | return $self->_literal_to_dq($$where); |
62d17764 |
282 | } elsif (ref($where) eq 'REF' and ref($$where) eq 'HASH') { |
283 | return $$where; |
a82e41dc |
284 | } elsif (!ref($where) or Scalar::Util::blessed($where)) { |
285 | return $self->_value_to_dq($where); |
286 | } |
287 | die "Can't handle $where"; |
288 | } |
289 | |
290 | sub _expr_to_dq_ARRAYREF { |
291 | my ($self, $where, $logic) = @_; |
292 | |
293 | $logic = uc($logic || $self->default_logic || 'OR'); |
294 | $logic eq 'AND' or $logic eq 'OR' or die "unknown logic: $logic"; |
295 | |
296 | return unless @$where; |
297 | |
298 | my ($first, @rest) = @$where; |
299 | |
300 | return $self->_expr_to_dq($first) unless @rest; |
301 | |
302 | my $first_dq = do { |
303 | if (!ref($first)) { |
304 | $self->_where_hashpair_to_dq($first => shift(@rest)); |
305 | } else { |
306 | $self->_expr_to_dq($first); |
307 | } |
308 | }; |
309 | |
310 | return $self->_expr_to_dq_ARRAYREF(\@rest, $logic) unless $first_dq; |
311 | |
312 | $self->_op_to_dq( |
313 | $logic, $first_dq, $self->_expr_to_dq_ARRAYREF(\@rest, $logic) |
314 | ); |
315 | } |
316 | |
317 | sub _expr_to_dq_HASHREF { |
318 | my ($self, $where, $logic) = @_; |
319 | |
320 | $logic = uc($logic) if $logic; |
321 | |
322 | my @dq = map { |
323 | $self->_where_hashpair_to_dq($_ => $where->{$_}, $logic) |
324 | } sort keys %$where; |
325 | |
326 | return $dq[0] unless @dq > 1; |
327 | |
328 | my $final = pop(@dq); |
329 | |
330 | foreach my $dq (reverse @dq) { |
331 | $final = $self->_op_to_dq($logic||'AND', $dq, $final); |
332 | } |
333 | |
334 | return $final; |
335 | } |
336 | |
337 | sub _where_to_dq_SCALAR { |
338 | shift->_value_to_dq(@_); |
339 | } |
340 | |
341 | sub _apply_to_dq { |
342 | my ($self, $op, $v) = @_; |
343 | my @args = map $self->_expr_to_dq($_), (ref($v) eq 'ARRAY' ? @$v : $v); |
344 | |
345 | # Ok. Welcome to stupid compat code land. An SQLA expr that would in the |
346 | # absence of this piece of crazy render to: |
347 | # |
348 | # A( B( C( x ) ) ) |
349 | # |
350 | # such as |
351 | # |
352 | # { -a => { -b => { -c => $x } } } |
353 | # |
354 | # actually needs to render to: |
355 | # |
356 | # A( B( C x ) ) |
357 | # |
358 | # because SQL sucks, and databases are hateful, and SQLA is Just That DWIM. |
359 | # |
360 | # However, we don't want to catch 'A(x)' and turn it into 'A x' |
361 | # |
362 | # So the way we deal with this is to go through all our arguments, and |
363 | # then if the argument is -also- an apply, i.e. at least 'B', we check |
364 | # its arguments - and if there's only one of them, and that isn't an apply, |
365 | # then we convert to the bareword form. The end result should be: |
366 | # |
367 | # A( x ) -> A( x ) |
368 | # A( B( x ) ) -> A( B x ) |
369 | # A( B( C( x ) ) ) -> A( B( C x ) ) |
370 | # A( B( x + y ) ) -> A( B( x + y ) ) |
371 | # A( B( x, y ) ) -> A( B( x, y ) ) |
372 | # |
373 | # If this turns out not to be quite right, please add additional tests |
374 | # to either 01generate.t or 02where.t *and* update this comment. |
375 | |
376 | foreach my $arg (@args) { |
377 | if ( |
378 | $arg->{type} eq DQ_OPERATOR and $arg->{operator}{'SQL.Naive'} eq 'apply' |
379 | and @{$arg->{args}} == 2 and $arg->{args}[1]{type} ne DQ_OPERATOR |
380 | ) { |
381 | $arg->{operator}{'SQL.Naive'} = (shift @{$arg->{args}})->{elements}->[0]; |
382 | } |
383 | } |
384 | $self->_assert_pass_injection_guard($op); |
385 | return $self->_op_to_dq( |
386 | apply => $self->_ident_to_dq($op), @args |
387 | ); |
388 | } |
389 | |
390 | sub _where_hashpair_to_dq { |
391 | my ($self, $k, $v, $logic) = @_; |
392 | |
393 | if ($k =~ /^-(.*)/s) { |
394 | my $op = uc($1); |
395 | if ($op eq 'AND' or $op eq 'OR') { |
396 | return $self->_expr_to_dq($v, $op); |
397 | } elsif ($op eq 'NEST') { |
398 | return $self->_expr_to_dq($v); |
399 | } elsif ($op eq 'NOT') { |
400 | return $self->_op_to_dq(NOT => $self->_expr_to_dq($v)); |
401 | } elsif ($op eq 'BOOL') { |
402 | return ref($v) ? $self->_expr_to_dq($v) : $self->_ident_to_dq($v); |
403 | } elsif ($op eq 'NOT_BOOL') { |
404 | return $self->_op_to_dq( |
405 | NOT => ref($v) ? $self->_expr_to_dq($v) : $self->_ident_to_dq($v) |
406 | ); |
407 | } elsif ($op eq 'IDENT') { |
408 | return $self->_ident_to_dq($v); |
409 | } elsif ($op eq 'VALUE') { |
410 | return $self->_value_to_dq($v); |
411 | } elsif ($op =~ /^(?:AND|OR|NEST)_?\d+/) { |
412 | die "Use of [and|or|nest]_N modifiers is no longer supported"; |
413 | } else { |
414 | return $self->_apply_to_dq($op, $v); |
415 | } |
416 | } else { |
417 | local our $Cur_Col_Meta = $k; |
418 | if (ref($v) eq 'ARRAY') { |
419 | if (!@$v) { |
420 | return $self->_literal_to_dq($self->{sqlfalse}); |
421 | } elsif (defined($v->[0]) && $v->[0] =~ /-(and|or)/i) { |
422 | return $self->_expr_to_dq_ARRAYREF([ |
423 | map +{ $k => $_ }, @{$v}[1..$#$v] |
424 | ], uc($1)); |
425 | } |
426 | return $self->_expr_to_dq_ARRAYREF([ |
427 | map +{ $k => $_ }, @$v |
428 | ], $logic); |
429 | } elsif (ref($v) eq 'SCALAR' or (ref($v) eq 'REF' and ref($$v) eq 'ARRAY')) { |
430 | return +{ |
a82e41dc |
431 | subtype => 'SQL', |
4caa4620 |
432 | %{ Literal([ $self->_ident_to_dq($k), $self->_literal_to_dq($$v) ]) }, |
a82e41dc |
433 | }; |
434 | } |
435 | my ($op, $rhs) = do { |
436 | if (ref($v) eq 'HASH') { |
437 | if (keys %$v > 1) { |
438 | return $self->_expr_to_dq_ARRAYREF([ |
439 | map +{ $k => { $_ => $v->{$_} } }, sort keys %$v |
440 | ], $logic||'AND'); |
441 | } |
442 | my ($op, $value) = %$v; |
443 | s/^-//, s/_/ /g for $op; |
444 | if ($op =~ /^(and|or)$/i) { |
445 | return $self->_expr_to_dq({ $k => $value }, $op); |
446 | } elsif ( |
447 | my $special_op = List::Util::first {$op =~ $_->{regex}} |
448 | @{$self->{special_ops}} |
449 | ) { |
450 | return $self->_literal_to_dq( |
451 | [ $special_op->{handler}->($k, $op, $value) ] |
452 | );; |
453 | } elsif ($op =~ /^(?:AND|OR|NEST)_?\d+$/i) { |
454 | die "Use of [and|or|nest]_N modifiers is no longer supported"; |
455 | } |
456 | (uc($op), $value); |
457 | } else { |
458 | ($self->{cmp}, $v); |
459 | } |
460 | }; |
461 | if ($op eq 'BETWEEN' or $op eq 'IN' or $op eq 'NOT IN' or $op eq 'NOT BETWEEN') { |
462 | if (ref($rhs) ne 'ARRAY') { |
463 | if ($op =~ /IN$/) { |
464 | # have to add parens if none present because -in => \"SELECT ..." |
465 | # got documented. mst hates everything. |
466 | if (ref($rhs) eq 'SCALAR') { |
467 | my $x = $$rhs; |
468 | 1 while ($x =~ s/\A\s*\((.*)\)\s*\Z/$1/s); |
469 | $rhs = \$x; |
470 | } else { |
471 | my ($x, @rest) = @{$$rhs}; |
472 | 1 while ($x =~ s/\A\s*\((.*)\)\s*\Z/$1/s); |
473 | $rhs = \[ $x, @rest ]; |
474 | } |
475 | } |
476 | return $self->_op_to_dq( |
477 | $op, $self->_ident_to_dq($k), $self->_literal_to_dq($$rhs) |
478 | ); |
479 | } |
480 | return $self->_literal_to_dq($self->{sqlfalse}) unless @$rhs; |
481 | return $self->_op_to_dq( |
482 | $op, $self->_ident_to_dq($k), map $self->_expr_to_dq($_), @$rhs |
483 | ) |
484 | } elsif ($op =~ s/^NOT (?!LIKE)//) { |
485 | return $self->_where_hashpair_to_dq(-not => { $k => { $op => $rhs } }); |
486 | } elsif ($op eq 'IDENT') { |
487 | return $self->_op_to_dq( |
488 | $self->{cmp}, $self->_ident_to_dq($k), $self->_ident_to_dq($rhs) |
489 | ); |
490 | } elsif ($op eq 'VALUE') { |
491 | return $self->_op_to_dq( |
492 | $self->{cmp}, $self->_ident_to_dq($k), $self->_value_to_dq($rhs) |
493 | ); |
494 | } elsif (!defined($rhs)) { |
495 | my $null_op = do { |
496 | if ($op eq '=' or $op eq 'LIKE') { |
497 | 'IS NULL' |
498 | } elsif ($op eq '!=') { |
499 | 'IS NOT NULL' |
500 | } else { |
501 | die "Can't do undef -> NULL transform for operator ${op}"; |
502 | } |
503 | }; |
504 | return $self->_op_to_dq($null_op, $self->_ident_to_dq($k)); |
505 | } |
506 | if (ref($rhs) eq 'ARRAY') { |
507 | if (!@$rhs) { |
508 | return $self->_literal_to_dq( |
509 | $op eq '!=' ? $self->{sqltrue} : $self->{sqlfalse} |
510 | ); |
511 | } elsif (defined($rhs->[0]) and $rhs->[0] =~ /^-(and|or)$/i) { |
512 | return $self->_expr_to_dq_ARRAYREF([ |
513 | map +{ $k => { $op => $_ } }, @{$rhs}[1..$#$rhs] |
514 | ], uc($1)); |
515 | } elsif ($op =~ /^-(?:AND|OR|NEST)_?\d+/) { |
516 | die "Use of [and|or|nest]_N modifiers is no longer supported"; |
517 | } |
518 | return $self->_expr_to_dq_ARRAYREF([ |
519 | map +{ $k => { $op => $_ } }, @$rhs |
520 | ]); |
521 | } |
522 | return $self->_op_to_dq( |
523 | $op, $self->_ident_to_dq($k), $self->_expr_to_dq($rhs) |
524 | ); |
525 | } |
526 | } |
527 | |
528 | sub _order_by_to_dq { |
529 | my ($self, $arg, $dir, $from) = @_; |
530 | |
531 | return unless $arg; |
532 | |
4caa4620 |
533 | my $dq = Order( |
534 | undef, |
535 | (defined($dir) ? (!!($dir =~ /desc/i)) : undef), |
536 | ($from ? ($from) : undef), |
537 | ); |
a82e41dc |
538 | |
539 | if (!ref($arg)) { |
540 | $dq->{by} = $self->_ident_to_dq($arg); |
541 | } elsif (ref($arg) eq 'ARRAY') { |
542 | return unless @$arg; |
543 | local our $Order_Inner unless our $Order_Recursing; |
544 | local $Order_Recursing = 1; |
545 | my ($outer, $inner); |
546 | foreach my $member (@$arg) { |
547 | local $Order_Inner; |
548 | my $next = $self->_order_by_to_dq($member, $dir, $from); |
549 | $outer ||= $next; |
550 | $inner->{from} = $next if $inner; |
551 | $inner = $Order_Inner || $next; |
552 | } |
553 | $Order_Inner = $inner; |
554 | return $outer; |
555 | } elsif (ref($arg) eq 'REF' and ref($$arg) eq 'ARRAY') { |
556 | $dq->{by} = $self->_literal_to_dq($$arg); |
557 | } elsif (ref($arg) eq 'SCALAR') { |
8b9b83ae |
558 | |
559 | # < mst> right, but if it doesn't match that, it goes "ok, right, not sure, |
560 | # totally leaving this untouched as a literal" |
561 | # < mst> so I -think- it's relatively robust |
562 | # < ribasushi> right, it's relatively safe then |
563 | # < ribasushi> is this regex centralized? |
564 | # < mst> it only exists in _order_by_to_dq in SQL::Abstract::Converter |
565 | # < mst> it only exists because you were kind enough to support new |
566 | # dbihacks crack combined with old literal order_by crack |
567 | # < ribasushi> heh :) |
568 | |
daf6f830 |
569 | if (my ($ident, $dir) = $$arg =~ /^(\w+)(?:\s+(desc|asc))?$/i) { |
3d82b6c9 |
570 | $dq->{by} = $self->_ident_to_dq($ident); |
571 | $dq->{reverse} = 1 if $dir and lc($dir) eq 'desc'; |
572 | } else { |
573 | $dq->{by} = $self->_literal_to_dq($$arg); |
574 | } |
a82e41dc |
575 | } elsif (ref($arg) eq 'HASH') { |
576 | my ($key, $val, @rest) = %$arg; |
577 | |
578 | return unless $key; |
579 | |
580 | if (@rest or not $key =~ /^-(desc|asc)/i) { |
581 | die "hash passed to _order_by must have exactly one key (-desc or -asc)"; |
582 | } |
583 | my $dir = uc $1; |
584 | return $self->_order_by_to_dq($val, $dir, $from); |
585 | } else { |
586 | die "Can't handle $arg in _order_by_to_dq"; |
587 | } |
588 | return $dq; |
589 | } |
590 | |
591 | sub _table_to_dq { |
592 | my ($self, $from) = @_; |
593 | if (ref($from) eq 'ARRAY') { |
594 | die "Empty FROM list" unless my @f = @$from; |
595 | my $dq = $self->_table_to_dq(shift @f); |
596 | while (my $x = shift @f) { |
4caa4620 |
597 | $dq = Join( |
598 | $dq, |
599 | $self->_table_to_dq($x), |
600 | ); |
a82e41dc |
601 | } |
602 | $dq; |
603 | } elsif (ref($from) eq 'SCALAR' or (ref($from) eq 'REF')) { |
604 | $self->_literal_to_dq($$from); |
605 | } else { |
606 | $self->_ident_to_dq($from); |
607 | } |
608 | } |
609 | |
610 | # And bindtype |
611 | sub _bindtype (@) { |
612 | #my ($self, $col, @vals) = @_; |
613 | |
614 | #LDNOTE : changed original implementation below because it did not make |
615 | # sense when bindtype eq 'columns' and @vals > 1. |
616 | # return $self->{bindtype} eq 'columns' ? [ $col, @vals ] : @vals; |
617 | |
618 | # called often - tighten code |
619 | return $_[0]->bind_meta |
620 | ? map {[$_[1], $_]} @_[2 .. $#_] |
621 | : @_[2 .. $#_] |
622 | ; |
623 | } |
624 | |
625 | # Dies if any element of @bind is not in [colname => value] format |
626 | # if bindtype is 'columns'. |
627 | sub _assert_bindval_matches_bindtype { |
628 | # my ($self, @bind) = @_; |
629 | my $self = shift; |
630 | if ($self->bind_meta) { |
631 | for (@_) { |
632 | if (!defined $_ || ref($_) ne 'ARRAY' || @$_ != 2) { |
633 | die "bindtype 'columns' selected, you need to pass: [column_name => bind_value]" |
634 | } |
635 | } |
636 | } |
637 | } |
638 | |
639 | # Fix SQL case, if so requested |
640 | sub _sqlcase { |
641 | return $_[0]->lower_case ? $_[1] : uc($_[1]); |
642 | } |
643 | |
644 | 1; |