1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
package Tangram::Expr::FlatHash;
sub new
{
my $pkg = shift;
bless [ @_ ], $pkg;
}
sub includes
{
my ($self, $item) = @_;
my ($coll, $memdef) = @$self;
my $schema = $coll->{storage}{schema};
$item = Tangram::Type::String::quote($item)
if $memdef->{string_type};
my $coll_tid = 't' . $coll->root_table;
my $data_tid = 't' . Tangram::Expr::TableAlias->new;
return Tangram::Expr::Filter->new
(
expr => "$data_tid.coll = $coll_tid.$schema->{sql}{id_col} AND $data_tid.v = $item",
tight => 100,
objects => Set::Object->new($coll, Tangram::Expr::Table->new($memdef->{table}, $data_tid) ),
data_tid => $data_tid # for prefetch
);
}
sub exists
{
my ($self, $item) = @_;
my ($coll, $memdef) = @$self;
my $schema = $coll->{storage}{schema};
$item = Tangram::Type::String::quote($item)
if $memdef->{string_type};
my $coll_tid = 't' . $coll->root_table;
return Tangram::Expr::Filter->new
(
expr => "EXISTS (SELECT * FROM $memdef->{table} WHERE coll = $coll_tid.$schema->{sql}{id_col} AND v = $item)",
objects => Set::Object->new($coll),
);
}
1;
|
