string $name, string $query[, array $types = NULL])Asynchronously prepare a named statement for later execution with pq\Statement::exec().
NOTE:
If pq\Connection::$unbuffered isTRUE, each call to pq\Connection::getResult() will generate a distinct pq\Result containing exactly one row.
string $name#string $query#array $types# = NULLarray of type OIDs for the substitution parameters.