diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/protocol.sgml | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml index 04d8e7d21af..6008f3ac5f8 100644 --- a/doc/src/sgml/protocol.sgml +++ b/doc/src/sgml/protocol.sgml @@ -3624,10 +3624,10 @@ psql "dbname=postgres replication=database" -c "IDENTIFY_SYSTEM;" indicate that it can be sent by a frontend (F), a backend (B), or both (F & B). Notice that although each message includes a byte count at the beginning, - the message format is defined so that the message end can be found without - reference to the byte count. This aids validity checking. (The CopyData - message is an exception, because it forms part of a data stream; the contents - of any individual CopyData message cannot be interpretable on their own.) + most messages are defined so that the message end can be found without + reference to the byte count. This is for historical reasons, as the + original, now-obsolete protocol version 2 did not have an explicit length + field. It also aids validity checking though. </para> <variablelist> |