1 package SQL::Abstract::Converter;
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
10 use Data::Query::ExprHelpers;
14 has renderer_will_quote => (
22 has default_logic => (
23 is => 'ro', coerce => sub { uc($_[0]) }, default => sub { 'OR' }
27 is => 'ro', default => sub { 1 }
30 has cmp => (is => 'ro', default => sub { '=' });
32 has sqltrue => (is => 'ro', default => sub { '1=1' });
33 has sqlfalse => (is => 'ro', default => sub { '0=1' });
35 has special_ops => (is => 'ro', default => sub { [] });
37 # XXX documented but I don't current fail any tests not using it
38 has unary_ops => (is => 'ro', default => sub { [] });
40 has injection_guard => (
51 has identifier_sep => (
52 is => 'ro', default => sub { '.' },
55 has always_quote => (is => 'ro', default => sub { 1 });
57 has convert => (is => 'ro');
59 has array_datatypes => (is => 'ro');
62 my ($self, $literal) = @_;
64 ($literal, @bind) = @$literal if ref($literal) eq 'ARRAY';
65 Literal('SQL', $literal, [ $self->_bind_to_dq(@bind) ]);
69 my ($self, @bind) = @_;
73 $self->_assert_bindval_matches_bindtype(@bind);
74 map perl_scalar_value(reverse @$_), @bind
76 : map perl_scalar_value($_), @bind
80 my ($self, $value) = @_;
81 $self->_maybe_convert_dq(perl_scalar_value($value, our $Cur_Col_Meta));
85 my ($self, $ident) = @_;
86 $self->_assert_pass_injection_guard($ident)
87 unless $self->renderer_will_quote;
88 $self->_maybe_convert_dq(Identifier(split /\Q${\$self->identifier_sep}/, $ident));
91 sub _maybe_convert_dq {
93 if (my $c = $self->{where_convert}) {
94 Operator({ 'SQL.Naive' => 'apply' }, [
95 { type => DQ_IDENTIFIER, elements => [ $self->_sqlcase($c) ] },
105 my ($self, $op, @args) = @_;
106 $self->_assert_pass_injection_guard($op);
107 Operator({ 'SQL.Naive' => $op }, \@args);
110 sub _assert_pass_injection_guard {
111 if ($_[1] =~ $_[0]->{injection_guard}) {
112 my $class = ref $_[0];
113 die "Possible SQL injection attempt '$_[1]'. If this is indeed a part of the "
114 . "desired SQL use literal SQL ( \'...' or \[ '...' ] ) or supply your own "
115 . "{injection_guard} attribute to ${class}->new()"
120 my ($self, $table, $data, $options) = @_;
121 my (@names, @values);
122 if (ref($data) eq 'HASH') {
123 @names = sort keys %$data;
124 foreach my $k (@names) {
125 local our $Cur_Col_Meta = $k;
126 push @values, $self->_mutation_rhs_to_dq($data->{$k});
128 } elsif (ref($data) eq 'ARRAY') {
129 local our $Cur_Col_Meta;
130 @values = map $self->_mutation_rhs_to_dq($_), @$data;
132 die "Not handled yet";
135 if (my $r_source = $options->{returning}) {
137 map +(ref($_) ? $self->_expr_to_dq($_) : $self->_ident_to_dq($_)),
138 (ref($r_source) eq 'ARRAY' ? @$r_source : $r_source),
142 (@names ? ([ map $self->_ident_to_dq($_), @names ]) : undef),
144 $self->_table_to_dq($table),
145 ($returning ? ($returning) : undef),
149 sub _mutation_rhs_to_dq {
151 if (ref($v) eq 'ARRAY') {
152 if ($self->{array_datatypes}) {
153 return $self->_value_to_dq($v);
155 $v = \do { my $x = $v };
157 if (ref($v) eq 'HASH') {
158 my ($op, $arg, @rest) = %$v;
160 die 'Operator calls in update/insert must be in the form { -op => $arg }'
161 if (@rest or not $op =~ /^\-(.+)/);
163 return $self->_expr_to_dq($v);
167 my ($self, $table, $data, $where) = @_;
169 die "Unsupported data type specified to \$sql->update"
170 unless ref $data eq 'HASH';
174 foreach my $k (sort keys %$data) {
176 local our $Cur_Col_Meta = $k;
177 push @set, [ $self->_ident_to_dq($k), $self->_mutation_rhs_to_dq($v) ];
182 $self->_where_to_dq($where),
183 $self->_table_to_dq($table),
188 my ($self, $table, undef, $where) = @_;
190 my $source_dq = $self->_table_to_dq($table);
192 if (my $where_dq = $self->_where_to_dq($where)) {
193 $source_dq = Where($where_dq, $source_dq);
201 my ($table, $fields, $where, $order) = @_;
203 my $source_dq = $self->_source_to_dq(@_);
205 my $ordered_dq = do {
207 $self->_order_by_to_dq($order, undef, $source_dq);
213 return $self->_select_select_to_dq($fields, $ordered_dq);
216 sub _select_select_to_dq {
217 my ($self, $fields, $from_dq) = @_;
222 $self->_select_field_list_to_dq($fields),
227 sub _select_field_list_to_dq {
228 my ($self, $fields) = @_;
229 [ map $self->_select_field_to_dq($_),
230 ref($fields) eq 'ARRAY' ? @$fields : $fields ];
233 sub _select_field_to_dq {
234 my ($self, $field) = @_;
235 if (my $ref = ref($field)) {
236 if ($ref eq 'REF' and ref($$field) eq 'HASH') {
239 return $self->_literal_to_dq($$field);
242 return $self->_ident_to_dq($field)
246 my ($self, $table, $where) = @_;
248 $self->_where_to_dq($where),
249 $self->_table_to_dq($table),
254 my ($self, $where, $logic) = @_;
256 return undef unless defined($where);
258 # if we're given a simple string assume it's a literal
259 return $self->_literal_to_dq($where) if !ref($where);
261 # turn the convert misfeature on - only used in WHERE clauses
262 local $self->{where_convert} = $self->convert;
264 return $self->_expr_to_dq($where, $logic);
268 my ($self, $where, $logic) = @_;
270 if (ref($where) eq 'ARRAY') {
271 return $self->_expr_to_dq_ARRAYREF($where, $logic);
272 } elsif (ref($where) eq 'HASH') {
273 return $self->_expr_to_dq_HASHREF($where, $logic);
275 ref($where) eq 'SCALAR'
276 or (ref($where) eq 'REF' and ref($$where) eq 'ARRAY')
278 return $self->_literal_to_dq($$where);
279 } elsif (ref($where) eq 'REF' and ref($$where) eq 'HASH') {
281 } elsif (!ref($where) or Scalar::Util::blessed($where)) {
282 return $self->_value_to_dq($where);
284 die "Can't handle $where";
287 sub _expr_to_dq_ARRAYREF {
288 my ($self, $where, $logic) = @_;
290 $logic = uc($logic || $self->default_logic || 'OR');
291 $logic eq 'AND' or $logic eq 'OR' or die "unknown logic: $logic";
293 return unless @$where;
295 my ($first, @rest) = @$where;
297 return $self->_expr_to_dq($first) unless @rest;
301 $self->_where_hashpair_to_dq($first => shift(@rest));
303 $self->_expr_to_dq($first);
307 return $self->_expr_to_dq_ARRAYREF(\@rest, $logic) unless $first_dq;
310 $logic, $first_dq, $self->_expr_to_dq_ARRAYREF(\@rest, $logic)
314 sub _expr_to_dq_HASHREF {
315 my ($self, $where, $logic) = @_;
317 $logic = uc($logic) if $logic;
320 $self->_where_hashpair_to_dq($_ => $where->{$_}, $logic)
323 return $dq[0] unless @dq > 1;
325 my $final = pop(@dq);
327 foreach my $dq (reverse @dq) {
328 $final = $self->_op_to_dq($logic||'AND', $dq, $final);
334 sub _where_to_dq_SCALAR {
335 shift->_value_to_dq(@_);
339 my ($self, $op, $v) = @_;
340 my @args = map $self->_expr_to_dq($_), (ref($v) eq 'ARRAY' ? @$v : $v);
342 # Ok. Welcome to stupid compat code land. An SQLA expr that would in the
343 # absence of this piece of crazy render to:
349 # { -a => { -b => { -c => $x } } }
351 # actually needs to render to:
355 # because SQL sucks, and databases are hateful, and SQLA is Just That DWIM.
357 # However, we don't want to catch 'A(x)' and turn it into 'A x'
359 # So the way we deal with this is to go through all our arguments, and
360 # then if the argument is -also- an apply, i.e. at least 'B', we check
361 # its arguments - and if there's only one of them, and that isn't an apply,
362 # then we convert to the bareword form. The end result should be:
365 # A( B( x ) ) -> A( B x )
366 # A( B( C( x ) ) ) -> A( B( C x ) )
367 # A( B( x + y ) ) -> A( B( x + y ) )
368 # A( B( x, y ) ) -> A( B( x, y ) )
370 # If this turns out not to be quite right, please add additional tests
371 # to either 01generate.t or 02where.t *and* update this comment.
373 foreach my $arg (@args) {
375 $arg->{type} eq DQ_OPERATOR and $arg->{operator}{'SQL.Naive'} eq 'apply'
376 and @{$arg->{args}} == 2 and $arg->{args}[1]{type} ne DQ_OPERATOR
378 $arg->{operator}{'SQL.Naive'} = (shift @{$arg->{args}})->{elements}->[0];
381 $self->_assert_pass_injection_guard($op);
382 return $self->_op_to_dq(
383 apply => $self->_ident_to_dq($op), @args
387 sub _where_hashpair_to_dq {
388 my ($self, $k, $v, $logic) = @_;
390 if ($k =~ /^-(.*)/s) {
392 if ($op eq 'AND' or $op eq 'OR') {
393 return $self->_expr_to_dq($v, $op);
394 } elsif ($op eq 'NEST') {
395 return $self->_expr_to_dq($v);
396 } elsif ($op eq 'NOT') {
397 return $self->_op_to_dq(NOT => $self->_expr_to_dq($v));
398 } elsif ($op eq 'BOOL') {
399 return ref($v) ? $self->_expr_to_dq($v) : $self->_ident_to_dq($v);
400 } elsif ($op eq 'NOT_BOOL') {
401 return $self->_op_to_dq(
402 NOT => ref($v) ? $self->_expr_to_dq($v) : $self->_ident_to_dq($v)
404 } elsif ($op eq 'IDENT') {
405 return $self->_ident_to_dq($v);
406 } elsif ($op eq 'VALUE') {
407 return $self->_value_to_dq($v);
408 } elsif ($op =~ /^(?:AND|OR|NEST)_?\d+/) {
409 die "Use of [and|or|nest]_N modifiers is no longer supported";
411 return $self->_apply_to_dq($op, $v);
414 local our $Cur_Col_Meta = $k;
415 if (ref($v) eq 'ARRAY') {
417 return $self->_literal_to_dq($self->{sqlfalse});
418 } elsif (defined($v->[0]) && $v->[0] =~ /-(and|or)/i) {
419 return $self->_expr_to_dq_ARRAYREF([
420 map +{ $k => $_ }, @{$v}[1..$#$v]
423 return $self->_expr_to_dq_ARRAYREF([
424 map +{ $k => $_ }, @$v
426 } elsif (ref($v) eq 'SCALAR' or (ref($v) eq 'REF' and ref($$v) eq 'ARRAY')) {
427 return Literal('SQL', [ $self->_ident_to_dq($k), $self->_literal_to_dq($$v) ]);
429 my ($op, $rhs) = do {
430 if (ref($v) eq 'HASH') {
432 return $self->_expr_to_dq_ARRAYREF([
433 map +{ $k => { $_ => $v->{$_} } }, sort keys %$v
436 my ($op, $value) = %$v;
437 s/^-//, s/_/ /g for $op;
438 if ($op =~ /^(and|or)$/i) {
439 return $self->_expr_to_dq({ $k => $value }, $op);
441 my $special_op = List::Util::first {$op =~ $_->{regex}}
442 @{$self->{special_ops}}
444 return $self->_literal_to_dq(
445 [ $special_op->{handler}->($k, $op, $value) ]
447 } elsif ($op =~ /^(?:AND|OR|NEST)_?\d+$/i) {
448 die "Use of [and|or|nest]_N modifiers is no longer supported";
455 if ($op eq 'BETWEEN' or $op eq 'IN' or $op eq 'NOT IN' or $op eq 'NOT BETWEEN') {
456 if (ref($rhs) ne 'ARRAY') {
458 # have to add parens if none present because -in => \"SELECT ..."
459 # got documented. mst hates everything.
460 if (ref($rhs) eq 'SCALAR') {
462 1 while ($x =~ s/\A\s*\((.*)\)\s*\Z/$1/s);
465 my ($x, @rest) = @{$$rhs};
466 1 while ($x =~ s/\A\s*\((.*)\)\s*\Z/$1/s);
467 $rhs = \[ $x, @rest ];
470 return $self->_op_to_dq(
471 $op, $self->_ident_to_dq($k), $self->_literal_to_dq($$rhs)
474 return $self->_literal_to_dq($self->{sqlfalse}) unless @$rhs;
475 return $self->_op_to_dq(
476 $op, $self->_ident_to_dq($k), map $self->_expr_to_dq($_), @$rhs
478 } elsif ($op =~ s/^NOT (?!LIKE)//) {
479 return $self->_where_hashpair_to_dq(-not => { $k => { $op => $rhs } });
480 } elsif ($op eq 'IDENT') {
481 return $self->_op_to_dq(
482 $self->{cmp}, $self->_ident_to_dq($k), $self->_ident_to_dq($rhs)
484 } elsif ($op eq 'VALUE') {
485 return $self->_op_to_dq(
486 $self->{cmp}, $self->_ident_to_dq($k), $self->_value_to_dq($rhs)
488 } elsif (!defined($rhs)) {
490 if ($op eq '=' or $op eq 'LIKE') {
492 } elsif ($op eq '!=') {
495 die "Can't do undef -> NULL transform for operator ${op}";
498 return $self->_op_to_dq($null_op, $self->_ident_to_dq($k));
500 if (ref($rhs) eq 'ARRAY') {
502 return $self->_literal_to_dq(
503 $op eq '!=' ? $self->{sqltrue} : $self->{sqlfalse}
505 } elsif (defined($rhs->[0]) and $rhs->[0] =~ /^-(and|or)$/i) {
506 return $self->_expr_to_dq_ARRAYREF([
507 map +{ $k => { $op => $_ } }, @{$rhs}[1..$#$rhs]
509 } elsif ($op =~ /^-(?:AND|OR|NEST)_?\d+/) {
510 die "Use of [and|or|nest]_N modifiers is no longer supported";
512 return $self->_expr_to_dq_ARRAYREF([
513 map +{ $k => { $op => $_ } }, @$rhs
516 return $self->_op_to_dq(
517 $op, $self->_ident_to_dq($k), $self->_expr_to_dq($rhs)
522 sub _order_by_to_dq {
523 my ($self, $arg, $dir, $from) = @_;
529 (defined($dir) ? (!!($dir =~ /desc/i)) : undef),
530 ($from ? ($from) : undef),
534 $dq->{by} = $self->_ident_to_dq($arg);
535 } elsif (ref($arg) eq 'ARRAY') {
537 local our $Order_Inner unless our $Order_Recursing;
538 local $Order_Recursing = 1;
540 foreach my $member (@$arg) {
542 my $next = $self->_order_by_to_dq($member, $dir, $from);
544 $inner->{from} = $next if $inner;
545 $inner = $Order_Inner || $next;
547 $Order_Inner = $inner;
549 } elsif (ref($arg) eq 'REF' and ref($$arg) eq 'ARRAY') {
550 $dq->{by} = $self->_literal_to_dq($$arg);
551 } elsif (ref($arg) eq 'SCALAR') {
553 # < mst> right, but if it doesn't match that, it goes "ok, right, not sure,
554 # totally leaving this untouched as a literal"
555 # < mst> so I -think- it's relatively robust
556 # < ribasushi> right, it's relatively safe then
557 # < ribasushi> is this regex centralized?
558 # < mst> it only exists in _order_by_to_dq in SQL::Abstract::Converter
559 # < mst> it only exists because you were kind enough to support new
560 # dbihacks crack combined with old literal order_by crack
561 # < ribasushi> heh :)
563 if (my ($ident, $dir) = $$arg =~ /^(\w+)(?:\s+(desc|asc))?$/i) {
564 $dq->{by} = $self->_ident_to_dq($ident);
565 $dq->{reverse} = 1 if $dir and lc($dir) eq 'desc';
567 $dq->{by} = $self->_literal_to_dq($$arg);
569 } elsif (ref($arg) eq 'HASH') {
570 my ($key, $val, @rest) = %$arg;
574 if (@rest or not $key =~ /^-(desc|asc)/i) {
575 die "hash passed to _order_by must have exactly one key (-desc or -asc)";
578 return $self->_order_by_to_dq($val, $dir, $from);
580 die "Can't handle $arg in _order_by_to_dq";
586 my ($self, $from) = @_;
587 if (ref($from) eq 'ARRAY') {
588 die "Empty FROM list" unless my @f = @$from;
589 my $dq = $self->_table_to_dq(shift @f);
590 while (my $x = shift @f) {
593 $self->_table_to_dq($x),
597 } elsif (ref($from) eq 'SCALAR' or (ref($from) eq 'REF')) {
598 $self->_literal_to_dq($$from);
600 $self->_ident_to_dq($from);
606 #my ($self, $col, @vals) = @_;
608 #LDNOTE : changed original implementation below because it did not make
609 # sense when bindtype eq 'columns' and @vals > 1.
610 # return $self->{bindtype} eq 'columns' ? [ $col, @vals ] : @vals;
612 # called often - tighten code
613 return $_[0]->bind_meta
614 ? map {[$_[1], $_]} @_[2 .. $#_]
619 # Dies if any element of @bind is not in [colname => value] format
620 # if bindtype is 'columns'.
621 sub _assert_bindval_matches_bindtype {
622 # my ($self, @bind) = @_;
624 if ($self->bind_meta) {
626 if (!defined $_ || ref($_) ne 'ARRAY' || @$_ != 2) {
627 die "bindtype 'columns' selected, you need to pass: [column_name => bind_value]"
633 # Fix SQL case, if so requested
635 return $_[0]->lower_case ? $_[1] : uc($_[1]);