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use strict;
use warnings;
use lib "t/lib";
use SQLiteTest qw/connect_ok $sqlite_call/;
use Test::More;
use if -d ".git", "Test::FailWarnings";
my $dbh = connect_ok( RaiseError => 1, PrintError => 0, AutoCommit => 1 );
$dbh->$sqlite_call(create_module => vtab => "DBD::SQLite::VirtualTable::T");
ok $dbh->do("CREATE VIRTUAL TABLE foobar USING vtab(foo INTEGER, bar INTEGER)"),
"created foobar";
# overload functions "abs" and "substr"
$DBD::SQLite::VirtualTable::T::funcs{abs}{overloaded}
= sub {my $val = shift; return "fake_abs($val)" };
$DBD::SQLite::VirtualTable::T::funcs{substr}{overloaded}
= sub {my ($val, $offset, $len) = @_; return "fake_substr($val, $offset, $len)" };
# make a first query
my $row = $dbh->selectrow_hashref(<<"");
SELECT abs(foo) afoo,
abs(bar) abar,
substr(foo, 3, 5) sfoo,
trim(foo) tfoo
FROM foobar
is $DBD::SQLite::VirtualTable::T::funcs{abs}{calls}, 1, "abs called";
is $DBD::SQLite::VirtualTable::T::funcs{substr}{calls}, 1, "substr called";
is $DBD::SQLite::VirtualTable::T::funcs{trim}{calls}, 1, "trim called";
is_deeply $row, { 'abar' => 'fake_abs(1)',
'afoo' => 'fake_abs(0)',
'sfoo' => 'fake_substr(0, 3, 5)',
'tfoo' => '0' }, "func results";
# new query : FIND_FUNCTION should not be called again
$row = $dbh->selectrow_hashref(<<"");
SELECT abs(foo) afoo,
abs(bar) abar,
substr(foo, 3, 5) sfoo,
trim(foo) tfoo
FROM foobar
is $DBD::SQLite::VirtualTable::T::funcs{abs}{calls}, 1, "abs still 1";
is $DBD::SQLite::VirtualTable::T::funcs{substr}{calls}, 1, "substr still 1";
is $DBD::SQLite::VirtualTable::T::funcs{trim}{calls}, 1, "trim still 1";
# new table : should issue new calls to FIND_FUNCTION
ok $dbh->do("CREATE VIRTUAL TABLE barfoo USING vtab(foo INTEGER, bar INTEGER)"),
"created barfoo";
$row = $dbh->selectrow_hashref(<<"");
SELECT abs(foo) afoo,
abs(bar) abar,
substr(foo, 3, 5) sfoo,
trim(foo) tfoo
FROM barfoo
is $DBD::SQLite::VirtualTable::T::funcs{abs}{calls}, 2, "abs now 2";
is $DBD::SQLite::VirtualTable::T::funcs{substr}{calls}, 2, "substr now 2";
is $DBD::SQLite::VirtualTable::T::funcs{trim}{calls}, 2, "trim now 2";
# drop table : should free references to functions
ok $dbh->do("DROP TABLE foobar");
# drop connection
undef $dbh;
note "done";
done_testing;
package DBD::SQLite::VirtualTable::T;
use strict;
use warnings;
use base 'DBD::SQLite::VirtualTable';
sub BEST_INDEX {
my ($self, $constraints, $order_by) = @_;
my $ix = 0;
foreach my $constraint (@$constraints) {
$constraint->{argvIndex} = $ix++;
$constraint->{omit} = 1; # to prevent sqlite core to check values
}
my $outputs = {
idxNum => 1,
idxStr => "foobar",
orderByConsumed => 0,
estimatedCost => 1.0,
estimatedRows => undef,
};
return $outputs;
}
our %funcs;
sub FIND_FUNCTION {
my ($self, $n_arg, $function_name) = @_;
$funcs{$function_name}{calls} += 1;
my $func = $funcs{$function_name}{overloaded};
return $func;
}
package DBD::SQLite::VirtualTable::T::Cursor;
use strict;
use warnings;
use base 'DBD::SQLite::VirtualTable::Cursor';
sub NEW {
my $class = shift;
my $self = $class->DBD::SQLite::VirtualTable::Cursor::NEW(@_);
$self->{row_count} = 5;
return $self;
}
sub FILTER {
my ($self, $idxNum, $idxStr, @values) = @_;
return;
}
sub EOF {
my $self = shift;
return !$self->{row_count};
}
sub NEXT {
my $self = shift;
$self->{row_count}--;
}
sub COLUMN {
my ($self, $idxCol) = @_;
return $idxCol;
}
sub ROWID {
my ($self) = @_;
return $self->{row_count};
}
1;
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