sub _collapse_cond {
my ($self, $where, $where_is_anded_array) = @_;
+ my $fin;
+
if (! $where) {
return;
}
or return;
# Consolidate various @conds back into something more compact
- my $fin;
-
for my $c (@conds) {
if (ref $c ne 'HASH') {
push @{$fin->{-and}}, $c;
}
else {
for my $col (sort keys %$c) {
- if (exists $fin->{$col}) {
- my ($l, $r) = ($fin->{$col}, $c->{$col});
-
- (ref $_ ne 'ARRAY' or !@$_) and $_ = [ -and => $_ ] for ($l, $r);
- if (@$l and @$r and $l->[0] eq $r->[0] and $l->[0] eq '-and') {
- $fin->{$col} = [ -and => map { @$_[1..$#$_] } ($l, $r) ];
- }
- else {
- $fin->{$col} = [ -and => $fin->{$col}, $c->{$col} ];
- }
+ # consolidate all -and nodes
+ if ($col =~ /^\-and$/i) {
+ push @{$fin->{-and}},
+ ref $c->{$col} eq 'ARRAY' ? @{$c->{$col}}
+ : ref $c->{$col} eq 'HASH' ? %{$c->{$col}}
+ : { $col => $c->{$col} }
+ ;
+ }
+ elsif ($col =~ /^\-/) {
+ push @{$fin->{-and}}, { $col => $c->{$col} };
+ }
+ elsif (exists $fin->{$col}) {
+ $fin->{$col} = [ -and => map {
+ (ref $_ eq 'ARRAY' and ($_->[0]||'') =~ /^\-and$/i )
+ ? @{$_}[1..$#$_]
+ : $_
+ ;
+ } ($fin->{$col}, $c->{$col}) ];
}
else {
$fin->{$col} = $c->{$col};
}
}
}
-
- # unroll single-element -and nodes
- if ( ref $fin->{-and} eq 'ARRAY' and @{$fin->{-and}} == 1 ) {
- my $piece = (delete $fin->{-and})->[0];
- if (ref $piece eq 'ARRAY') {
- $fin->{-or} = $fin->{-or} ? [ $piece, $fin->{-or} ] : $piece;
- }
- elsif (! exists $fin->{''}) {
- $fin->{''} = $piece;
- }
- }
-
- return $fin;
}
elsif (ref $where eq 'ARRAY') {
- my @w = @$where;
+ # we are always at top-level here, it is safe to dump empty *standalone* pieces
+ my $fin_idx;
- while ( @w and (
- (ref $w[0] eq 'ARRAY' and ! @{$w[0]} )
- or
- (ref $w[0] eq 'HASH' and ! keys %{$w[0]})
- )) { shift @w };
+ for (my $i = 0; $i <= $#$where; $i++ ) {
- return unless @w;
+ my $logic_mod = lc ( ($where->[$i] =~ /^(\-(?:and|or))$/i)[0] || '' );
- if ( @w == 1 ) {
- return ( length ref $w[0] )
- ? $self->_collapse_cond($w[0])
- : { $w[0] => undef }
- ;
- }
- elsif ( @w == 2 and ! length ref $w[0]) {
- if ( ( $w[0]||'' ) =~ /^\-and$/i ) {
- return (ref $w[1] eq 'HASH' or ref $w[1] eq 'ARRAY')
- ? $self->_collapse_cond($w[1], (ref $w[1] eq 'ARRAY') )
- : $self->throw_exception("Unsupported top-level op/arg pair: [ $w[0] => $w[1] ]")
- ;
+ if ($logic_mod) {
+ $i++;
+ $self->throw_exception("Unsupported top-level op/arg pair: [ $logic_mod => $where->[$i] ]")
+ unless ref $where->[$i] eq 'HASH' or ref $where->[$i] eq 'ARRAY';
+
+ my $sub_elt = $self->_collapse_cond({ $logic_mod => $where->[$i] })
+ or next;
+
+ $fin_idx->{ "SER_" . serialize $sub_elt } = $sub_elt;
+ }
+ elsif (! length ref $where->[$i] ) {
+ my $sub_elt = $self->_collapse_cond({ @{$where}[$i, $i+1] })
+ or next;
+
+ $fin_idx->{ "COL_$where->[$i]_" . serialize $sub_elt } = $sub_elt;
+ $i++;
}
else {
- return $self->_collapse_cond({ @w });
+ $fin_idx->{ "SER_" . serialize $where->[$i] } = $self->_collapse_cond( $where->[$i] ) || next;
}
}
- else {
- return { -or => \@w };
- }
+
+ return unless $fin_idx;
+
+ $fin = ( keys %$fin_idx == 1 ) ? (values %$fin_idx)[0] : {
+ -or => [ map
+ { ref $fin_idx->{$_} eq 'HASH' ? %{$fin_idx->{$_}} : $fin_idx->{$_} }
+ sort keys %$fin_idx
+ ]
+ };
}
else {
# not a hash not an array
- return { '' => $where };
+ $fin = { '' => $where };
+ }
+
+ # unroll single-element -and's
+ while (
+ $fin->{-and}
+ and
+ @{$fin->{-and}} < 2
+ ) {
+ my $and = delete $fin->{-and};
+ last if @$and == 0;
+
+ # at this point we have @$and == 1
+ if (
+ ref $and->[0] eq 'HASH'
+ and
+ ! grep { exists $fin->{$_} } keys %{$and->[0]}
+ ) {
+ $fin = {
+ %$fin, %{$and->[0]}
+ };
+ }
+ }
+
+ # compress same-column conds found in $fin
+ for my $col ( grep { $_ !~ /^\-/ } keys %$fin ) {
+ next unless ref $fin->{$col} eq 'ARRAY' and ($fin->{$col}[0]||'') =~ /^\-and$/i;
+ my $val_bag = { map {
+ (! defined $_ ) ? ( UNDEF => undef )
+ : ( ! ref $_ or is_plain_value $_ ) ? ( "VAL_$_" => $_ )
+ : ( ( 'SER_' . serialize $_ ) => $_ )
+ } @{$fin->{$col}}[1 .. $#{$fin->{$col}}] };
+
+ if (keys %$val_bag == 1 ) {
+ ($fin->{$col}) = values %$val_bag;
+ }
+ else {
+ $fin->{$col} = [ -and => map { $val_bag->{$_} } sort keys %$val_bag ];
+ }
}
- die 'should not get here';
+ return keys %$fin ? $fin : ();
}
sub _collapse_cond_unroll_pairs {
unshift @$pairs, $lhs => $rhs->[1];
}
else {
- push @conds, { $lhs => $rhs };
+ push @conds, { $lhs => [ @{$rhs}[1..$#$rhs] ] };
}
}
elsif (@$rhs == 1) {