Perform SQL query to DB
Perform SQL query to DB
Returns null if no notifies was received
Submits a request to create a prepared statement with the given parameters, and waits for completion.
Sends a request to create a prepared statement with the given parameters, without waiting for completion.
Submits a command to the server without waiting for the result(s)
Submits a command and separate parameters to the server without waiting for the result(s)
Sends a request to execute a prepared statement with given parameters, without waiting for the result(s)
Waiting for completion of reading or writing Return: timeout not occured