-# array pq\Statement::descAsync()
+# void pq\Statement::descAsync(callable $callback)
[Asynchronously](pq/Connection/: Asynchronous Usage) describe the parameters of the prepared statement.
## Params:
-None.
-
-## Returns:
-
-* array, list of type OIDs of the substitution parameters.
+* callable $callback as function(array $oids)
+ A callback to receive list of type OIDs of the substitution parameters.
## Throws: