Postgres

Tag 0: the client opens its half of a database connection the server announced, quoting the connection id; the server sends everything the driver wrote, and the channel response finish when the driver’s socket ends.

The client opens this channel as its half of a database connection the server announced on a postgres channel of its own, quoting the connection id. The server sends on it everything the driver writes.

• The request. The tag byte 0 followed by the connection id, four bytes. Request states its form.
• The response. The bytes the driver wrote, as channel responses, and the channel response finish when the driver’s socket ends. Response states the sequence.
• Nothing is lost. The server reads nothing from the driver before this channel opens, and sends what the driver wrote from the moment it does, in order.
• One half per connection. A connection id the server did not announce, and an id whose half was already opened, are answered by a channel response finish that no channel response precedes.