diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/protocol.sgml | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml index 75fe6b3982e..c4605a13efc 100644 --- a/doc/src/sgml/protocol.sgml +++ b/doc/src/sgml/protocol.sgml @@ -1,4 +1,4 @@ -<!-- $Header: /cvsroot/pgsql/doc/src/sgml/protocol.sgml,v 1.39 2003/06/27 19:08:37 tgl Exp $ --> +<!-- $Header: /cvsroot/pgsql/doc/src/sgml/protocol.sgml,v 1.40 2003/08/13 18:56:21 tgl Exp $ --> <chapter id="protocol"> <title>Frontend/Backend Protocol</title> @@ -919,8 +919,7 @@ <para> In the event of a backend-detected error during copy-in mode (including - receipt of a CopyFail message, or indeed any frontend message other than - CopyData or CopyDone), the backend will issue an ErrorResponse + receipt of a CopyFail message), the backend will issue an ErrorResponse message. If the <command>COPY</> command was issued via an extended-query message, the backend will now discard frontend messages until a Sync message is received, then it will issue ReadyForQuery and return to normal @@ -931,6 +930,15 @@ </para> <para> + The backend will ignore Flush and Sync messages received during copy-in + mode. Receipt of any other non-copy message type constitutes an error + that will abort the copy-in state as described above. (The exception for + Flush and Sync is for the convenience of client libraries that always + send Flush or Sync after an Execute message, without checking whether + the command to be executed is a <command>COPY FROM STDIN</>.) + </para> + + <para> Copy-out mode (data transfer from the server) is initiated when the backend executes a <command>COPY TO STDOUT</> SQL statement. The backend sends a CopyOutResponse message to the frontend, followed by |