/**
* Creates SELECT statement.
* @param Connection $connection
* @param string|array|Traversable $columns
* @param string|Result $source Table name or subquery
* @throws InvalidArgumentException
*/
public function __construct(Connection $connection, $columns = null, $source = null)
{
parent::__construct($connection);
// Input check
if ($columns === null && $source === null) {
throw new InvalidArgumentException('Missing select source.');
}
if ($source === null) {
$source = $columns;
$columns = '*';
}
if (!is_string($source) && !$source instanceof self) {
throw new InvalidArgumentException('Source must be a string or Neevo\\Result.');
}
$columns = is_string($columns) ? explode(',', $columns) : ($columns instanceof Traversable ? iterator_to_array($columns) : (array) $columns);
if (empty($columns)) {
throw new InvalidArgumentException('No columns given.');
}
if ($source instanceof self) {
$this->subqueries[] = $source;
}
$this->type = Manager::STMT_SELECT;
$this->columns = array_map('trim', $columns);
$this->source = $source;
$this->detectTypes = (bool) $connection['result']['detectTypes'];
$this->setRowClass($connection['rowClass']);
}
