Database: opt
Restore : No

Operator : send
Number   : 1
Signature: (stream (tuple ((a1 t1)(a2 t2) ... (an tn)))) x int x [ai] -> int
Example  : query plz feed send[1032, PLZ]
Result   : crashes
Remark   : Cannot be tested in single user pattern

Operator : receive
Number   : 1
Signature: string x int -> (stream (tuple x))
Example  : query receive("localhost",1032) consume
Result   : crashes
Remark   : Cannot be tested in single user pattern