void generate_random_value(grnxx::GeoPoint *value) {
if ((rng() % 256) == 0) {
*value = grnxx::GeoPoint::na();
} else {
grnxx::Float latitude(-90.0 + (180.0 * rng() / rng.max()));
grnxx::Float longitude(-180.0 + (360.0 * rng() / rng.max()));
*value = grnxx::GeoPoint(latitude, longitude);
}
}
void generate_random_value(grnxx::Float *value) {
if ((rng() % 256) == 0) {
*value = grnxx::Float::na();
} else {
*value = grnxx::Float(1.0 * rng() / rng.max());
}
}
/**@brief Generator a random nuber between 0 and 1 in the range [0,1)
*
* @return a double in [0,1)
*/
double unifRand() {
return mtGen_() / (static_cast<double>(mtGen_.max()) + 1);
}
void test_scored_subexpression() {
// Create a database with the default options.
auto db = grnxx::open_db("");
// Create a table with the default options.
auto table = db->create_table("Table");
constexpr size_t NUM_ROWS = 1 << 16;
// Generate random values.
grnxx::Array<grnxx::Float> float_values;
grnxx::Array<grnxx::Int> ref_values;
float_values.resize(NUM_ROWS);
ref_values.resize(NUM_ROWS);
for (size_t i = 0; i < NUM_ROWS; ++i) {
float_values[i] = grnxx::Float(1.0 * rng() / rng.max());
// ref_values[i] = mersenne_twister() % NUM_ROWS;
ref_values[i] = grnxx::Int(0);
}
// Create columns for Float and Int values.
auto float_column = table->create_column("Float", GRNXX_FLOAT);
grnxx::ColumnOptions options;
options.reference_table_name = "Table";
auto ref_column = table->create_column("Ref", GRNXX_INT, options);
// Store generated values into columns.
for (size_t i = 0; i < NUM_ROWS; ++i) {
grnxx::Int row_id = table->insert_row();
assert(row_id.match(grnxx::Int(i)));
float_column->set(row_id, float_values[i]);
}
for (size_t i = 0; i < NUM_ROWS; ++i) {
ref_column->set(grnxx::Int(i), ref_values[i]);
}
// Generate a list of records.
grnxx::Array<grnxx::Record> records;
auto cursor = table->create_cursor();
assert(cursor->read_all(&records) == table->num_rows());
// Set scores (Float).
auto builder = grnxx::ExpressionBuilder::create(table);
builder->push_column("Float");
auto expression = builder->release();
expression->adjust(&records);
// Test an expression (Ref.(_score > 0.5)).
builder->push_column("Ref");
builder->begin_subexpression();
builder->push_score();
builder->push_constant(grnxx::Float(0.5));
builder->push_operator(GRNXX_GREATER);
builder->end_subexpression();
expression = builder->release();
expression->filter(&records);
size_t count = 0;
for (size_t i = 0; i < NUM_ROWS; ++i) {
if (float_values[i].raw() > 0.5) {
assert(records[count].row_id.match(grnxx::Int(i)));
++count;
}
}
assert(records.size() == count);
}
