send
Query {"String": "SELECT 2::int8"}
----

until
ReadyForQuery
----
{"Type":"RowDescription","Fields":[{"Name":"int8","TableOID":0,"TableAttributeNumber":0,"DataTypeOID":20,"DataTypeSize":8,"TypeModifier":-1,"Format":0}]}
{"Type":"DataRow","Values":[{"text":"2"}]}
{"Type":"CommandComplete","CommandTag":"SELECT 1"}
{"Type":"ReadyForQuery","TxStatus":"I"}
