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';
67 %{ Literal($literal, [ $self->_bind_to_dq(@bind) ]) }
72 my ($self, @bind) = @_;
76 $self->_assert_bindval_matches_bindtype(@bind);
77 map perl_scalar_value(reverse @$_), @bind
79 : map perl_scalar_value($_), @bind
83 my ($self, $value) = @_;
84 $self->_maybe_convert_dq(perl_scalar_value($value, our $Cur_Col_Meta));
88 my ($self, $ident) = @_;
89 $self->_assert_pass_injection_guard($ident)
90 unless $self->renderer_will_quote;
91 $self->_maybe_convert_dq(Identifier(split /\Q${\$self->identifier_sep}/, $ident));
94 sub _maybe_convert_dq {
96 if (my $c = $self->{where_convert}) {
97 Operator({ 'SQL.Naive' => 'apply' }, [
98 { type => DQ_IDENTIFIER, elements => [ $self->_sqlcase($c) ] },
108 my ($self, $op, @args) = @_;
109 $self->_assert_pass_injection_guard($op);
110 Operator({ 'SQL.Naive' => $op }, \@args);
113 sub _assert_pass_injection_guard {
114 if ($_[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 ${class}->new()"
123 my ($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->{$k});
131 } elsif (ref($data) eq 'ARRAY') {
132 local our $Cur_Col_Meta;
133 @values = map $self->_mutation_rhs_to_dq($_), @$data;
135 die "Not handled yet";
138 if (my $r_source = $options->{returning}) {
140 map +(ref($_) ? $self->_expr_to_dq($_) : $self->_ident_to_dq($_)),
141 (ref($r_source) eq 'ARRAY' ? @$r_source : $r_source),
145 (@names ? ([ map $self->_ident_to_dq($_), @names ]) : undef),
147 $self->_table_to_dq($table),
148 ($returning ? ($returning) : undef),
152 sub _mutation_rhs_to_dq {
154 if (ref($v) eq 'ARRAY') {
155 if ($self->{array_datatypes}) {
156 return $self->_value_to_dq($v);
158 $v = \do { my $x = $v };
160 if (ref($v) eq 'HASH') {
161 my ($op, $arg, @rest) = %$v;
163 die 'Operator calls in update/insert must be in the form { -op => $arg }'
164 if (@rest or not $op =~ /^\-(.+)/);
166 return $self->_expr_to_dq($v);
170 my ($self, $table, $data, $where) = @_;
172 die "Unsupported data type specified to \$sql->update"
173 unless ref $data eq 'HASH';
177 foreach my $k (sort keys %$data) {
179 local our $Cur_Col_Meta = $k;
180 push @set, [ $self->_ident_to_dq($k), $self->_mutation_rhs_to_dq($v) ];
185 $self->_where_to_dq($where),
186 $self->_table_to_dq($table),
191 my ($self, $table, undef, $where) = @_;
193 my $source_dq = $self->_table_to_dq($table);
195 if (my $where_dq = $self->_where_to_dq($where)) {
196 $source_dq = Where($where_dq, $source_dq);
204 my ($table, $fields, $where, $order) = @_;
206 my $source_dq = $self->_source_to_dq(@_);
208 my $ordered_dq = do {
210 $self->_order_by_to_dq($order, undef, $source_dq);
216 return $self->_select_select_to_dq($fields, $ordered_dq);
219 sub _select_select_to_dq {
220 my ($self, $fields, $from_dq) = @_;
225 $self->_select_field_list_to_dq($fields),
230 sub _select_field_list_to_dq {
231 my ($self, $fields) = @_;
232 [ map $self->_select_field_to_dq($_),
233 ref($fields) eq 'ARRAY' ? @$fields : $fields ];
236 sub _select_field_to_dq {
237 my ($self, $field) = @_;
238 if (my $ref = ref($field)) {
239 if ($ref eq 'REF' and ref($$field) eq 'HASH') {
242 return $self->_literal_to_dq($$field);
245 return $self->_ident_to_dq($field)
249 my ($self, $table, $where) = @_;
251 $self->_where_to_dq($where),
252 $self->_table_to_dq($table),
257 my ($self, $where, $logic) = @_;
259 return undef unless defined($where);
261 # if we're given a simple string assume it's a literal
262 return $self->_literal_to_dq($where) if !ref($where);
264 # turn the convert misfeature on - only used in WHERE clauses
265 local $self->{where_convert} = $self->convert;
267 return $self->_expr_to_dq($where, $logic);
271 my ($self, $where, $logic) = @_;
273 if (ref($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, $logic);
278 ref($where) eq 'SCALAR'
279 or (ref($where) eq 'REF' and ref($$where) eq 'ARRAY')
281 return $self->_literal_to_dq($$where);
282 } elsif (ref($where) eq 'REF' and ref($$where) eq 'HASH') {
284 } elsif (!ref($where) or Scalar::Util::blessed($where)) {
285 return $self->_value_to_dq($where);
287 die "Can't handle $where";
290 sub _expr_to_dq_ARRAYREF {
291 my ($self, $where, $logic) = @_;
293 $logic = uc($logic || $self->default_logic || 'OR');
294 $logic eq 'AND' or $logic eq 'OR' or die "unknown logic: $logic";
296 return unless @$where;
298 my ($first, @rest) = @$where;
300 return $self->_expr_to_dq($first) unless @rest;
304 $self->_where_hashpair_to_dq($first => shift(@rest));
306 $self->_expr_to_dq($first);
310 return $self->_expr_to_dq_ARRAYREF(\@rest, $logic) unless $first_dq;
313 $logic, $first_dq, $self->_expr_to_dq_ARRAYREF(\@rest, $logic)
317 sub _expr_to_dq_HASHREF {
318 my ($self, $where, $logic) = @_;
320 $logic = uc($logic) if $logic;
323 $self->_where_hashpair_to_dq($_ => $where->{$_}, $logic)
326 return $dq[0] unless @dq > 1;
328 my $final = pop(@dq);
330 foreach my $dq (reverse @dq) {
331 $final = $self->_op_to_dq($logic||'AND', $dq, $final);
337 sub _where_to_dq_SCALAR {
338 shift->_value_to_dq(@_);
342 my ($self, $op, $v) = @_;
343 my @args = map $self->_expr_to_dq($_), (ref($v) eq 'ARRAY' ? @$v : $v);
345 # Ok. Welcome to stupid compat code land. An SQLA expr that would in the
346 # absence of this piece of crazy render to:
352 # { -a => { -b => { -c => $x } } }
354 # actually needs to render to:
358 # because SQL sucks, and databases are hateful, and SQLA is Just That DWIM.
360 # However, we don't want to catch 'A(x)' and turn it into 'A x'
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:
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 ) )
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.
376 foreach my $arg (@args) {
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
381 $arg->{operator}{'SQL.Naive'} = (shift @{$arg->{args}})->{elements}->[0];
384 $self->_assert_pass_injection_guard($op);
385 return $self->_op_to_dq(
386 apply => $self->_ident_to_dq($op), @args
390 sub _where_hashpair_to_dq {
391 my ($self, $k, $v, $logic) = @_;
393 if ($k =~ /^-(.*)/s) {
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)
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";
414 return $self->_apply_to_dq($op, $v);
417 local our $Cur_Col_Meta = $k;
418 if (ref($v) eq 'ARRAY') {
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]
426 return $self->_expr_to_dq_ARRAYREF([
427 map +{ $k => $_ }, @$v
429 } elsif (ref($v) eq 'SCALAR' or (ref($v) eq 'REF' and ref($$v) eq 'ARRAY')) {
432 %{ Literal([ $self->_ident_to_dq($k), $self->_literal_to_dq($$v) ]) },
435 my ($op, $rhs) = do {
436 if (ref($v) eq 'HASH') {
438 return $self->_expr_to_dq_ARRAYREF([
439 map +{ $k => { $_ => $v->{$_} } }, sort keys %$v
442 my ($op, $value) = %$v;
443 s/^-//, s/_/ /g for $op;
444 if ($op =~ /^(and|or)$/i) {
445 return $self->_expr_to_dq({ $k => $value }, $op);
447 my $special_op = List::Util::first {$op =~ $_->{regex}}
448 @{$self->{special_ops}}
450 return $self->_literal_to_dq(
451 [ $special_op->{handler}->($k, $op, $value) ]
453 } elsif ($op =~ /^(?:AND|OR|NEST)_?\d+$/i) {
454 die "Use of [and|or|nest]_N modifiers is no longer supported";
461 if ($op eq 'BETWEEN' or $op eq 'IN' or $op eq 'NOT IN' or $op eq 'NOT BETWEEN') {
462 if (ref($rhs) ne 'ARRAY') {
464 # have to add parens if none present because -in => \"SELECT ..."
465 # got documented. mst hates everything.
466 if (ref($rhs) eq 'SCALAR') {
468 1 while ($x =~ s/\A\s*\((.*)\)\s*\Z/$1/s);
471 my ($x, @rest) = @{$$rhs};
472 1 while ($x =~ s/\A\s*\((.*)\)\s*\Z/$1/s);
473 $rhs = \[ $x, @rest ];
476 return $self->_op_to_dq(
477 $op, $self->_ident_to_dq($k), $self->_literal_to_dq($$rhs)
480 return $self->_literal_to_dq($self->{sqlfalse}) unless @$rhs;
481 return $self->_op_to_dq(
482 $op, $self->_ident_to_dq($k), map $self->_expr_to_dq($_), @$rhs
484 } elsif ($op =~ s/^NOT (?!LIKE)//) {
485 return $self->_where_hashpair_to_dq(-not => { $k => { $op => $rhs } });
486 } elsif ($op eq 'IDENT') {
487 return $self->_op_to_dq(
488 $self->{cmp}, $self->_ident_to_dq($k), $self->_ident_to_dq($rhs)
490 } elsif ($op eq 'VALUE') {
491 return $self->_op_to_dq(
492 $self->{cmp}, $self->_ident_to_dq($k), $self->_value_to_dq($rhs)
494 } elsif (!defined($rhs)) {
496 if ($op eq '=' or $op eq 'LIKE') {
498 } elsif ($op eq '!=') {
501 die "Can't do undef -> NULL transform for operator ${op}";
504 return $self->_op_to_dq($null_op, $self->_ident_to_dq($k));
506 if (ref($rhs) eq 'ARRAY') {
508 return $self->_literal_to_dq(
509 $op eq '!=' ? $self->{sqltrue} : $self->{sqlfalse}
511 } elsif (defined($rhs->[0]) and $rhs->[0] =~ /^-(and|or)$/i) {
512 return $self->_expr_to_dq_ARRAYREF([
513 map +{ $k => { $op => $_ } }, @{$rhs}[1..$#$rhs]
515 } elsif ($op =~ /^-(?:AND|OR|NEST)_?\d+/) {
516 die "Use of [and|or|nest]_N modifiers is no longer supported";
518 return $self->_expr_to_dq_ARRAYREF([
519 map +{ $k => { $op => $_ } }, @$rhs
522 return $self->_op_to_dq(
523 $op, $self->_ident_to_dq($k), $self->_expr_to_dq($rhs)
528 sub _order_by_to_dq {
529 my ($self, $arg, $dir, $from) = @_;
535 (defined($dir) ? (!!($dir =~ /desc/i)) : undef),
536 ($from ? ($from) : undef),
540 $dq->{by} = $self->_ident_to_dq($arg);
541 } elsif (ref($arg) eq 'ARRAY') {
543 local our $Order_Inner unless our $Order_Recursing;
544 local $Order_Recursing = 1;
546 foreach my $member (@$arg) {
548 my $next = $self->_order_by_to_dq($member, $dir, $from);
550 $inner->{from} = $next if $inner;
551 $inner = $Order_Inner || $next;
553 $Order_Inner = $inner;
555 } elsif (ref($arg) eq 'REF' and ref($$arg) eq 'ARRAY') {
556 $dq->{by} = $self->_literal_to_dq($$arg);
557 } elsif (ref($arg) eq 'SCALAR') {
559 # < mst> right, but if it doesn't match that, it goes "ok, right, not sure,
560 # totally leaving this untouched as a literal"
561 # < mst> so I -think- it's relatively robust
562 # < ribasushi> right, it's relatively safe then
563 # < ribasushi> is this regex centralized?
564 # < mst> it only exists in _order_by_to_dq in SQL::Abstract::Converter
565 # < mst> it only exists because you were kind enough to support new
566 # dbihacks crack combined with old literal order_by crack
567 # < ribasushi> heh :)
569 if (my ($ident, $dir) = $$arg =~ /^(\w+)(?:\s+(desc|asc))?$/i) {
570 $dq->{by} = $self->_ident_to_dq($ident);
571 $dq->{reverse} = 1 if $dir and lc($dir) eq 'desc';
573 $dq->{by} = $self->_literal_to_dq($$arg);
575 } elsif (ref($arg) eq 'HASH') {
576 my ($key, $val, @rest) = %$arg;
580 if (@rest or not $key =~ /^-(desc|asc)/i) {
581 die "hash passed to _order_by must have exactly one key (-desc or -asc)";
584 return $self->_order_by_to_dq($val, $dir, $from);
586 die "Can't handle $arg in _order_by_to_dq";
592 my ($self, $from) = @_;
593 if (ref($from) eq 'ARRAY') {
594 die "Empty FROM list" unless my @f = @$from;
595 my $dq = $self->_table_to_dq(shift @f);
596 while (my $x = shift @f) {
599 $self->_table_to_dq($x),
603 } elsif (ref($from) eq 'SCALAR' or (ref($from) eq 'REF')) {
604 $self->_literal_to_dq($$from);
606 $self->_ident_to_dq($from);
612 #my ($self, $col, @vals) = @_;
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;
618 # called often - tighten code
619 return $_[0]->bind_meta
620 ? map {[$_[1], $_]} @_[2 .. $#_]
625 # Dies if any element of @bind is not in [colname => value] format
626 # if bindtype is 'columns'.
627 sub _assert_bindval_matches_bindtype {
628 # my ($self, @bind) = @_;
630 if ($self->bind_meta) {
632 if (!defined $_ || ref($_) ne 'ARRAY' || @$_ != 2) {
633 die "bindtype 'columns' selected, you need to pass: [column_name => bind_value]"
639 # Fix SQL case, if so requested
641 return $_[0]->lower_case ? $_[1] : uc($_[1]);