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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2003-05-06 23:10:04 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2003-05-06 23:10:04 +0000 |
| commit | efa58e105da23aa145cb401ab615143239be9375 (patch) | |
| tree | eeb40400ad68e0e89b29f082ba6ab56a61a3ae03 | |
| parent | 755d19170095ae6a775046b8bc97cb070bdc7582 (diff) | |
| download | postgresql-efa58e105da23aa145cb401ab615143239be9375.tar.gz postgresql-efa58e105da23aa145cb401ab615143239be9375.zip | |
Minor editorializing.
| -rw-r--r-- | doc/src/sgml/protocol.sgml | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml index ffaaa2004ac..f1f5b1caa3b 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 1.35 2003/05/06 21:51:41 tgl Exp $ --> +<!-- $Header: /cvsroot/pgsql/doc/src/sgml/protocol.sgml,v 1.36 2003/05/06 23:10:04 tgl Exp $ --> <chapter id="protocol"> <title>Frontend/Backend Protocol</title> @@ -160,10 +160,11 @@ (but note that these exist only within a session, and are never shared across sessions). Existing prepared statements and portals are referenced by names assigned when they were created. In addition, - an <quote>unnamed</> prepared statement and portal exist, for use with - queries that are to be executed and forgotten. This is slightly - more efficient than using named objects, since the backend knows that - it need not save the object's state for re-use. + an <quote>unnamed</> prepared statement and portal exist. Although these + behave largely the same as named objects, operations on them are optimized + for the case of executing a query only once and then discarding it, + whereas operations on named objects are optimized on the expectation + of multiple uses. </para> </sect2> </sect1> @@ -869,7 +870,8 @@ zero or more CopyData messages (always one per row), followed by CopyDone. The backend then reverts to the command-processing mode it was in before the <command>COPY</> started, and sends CommandComplete. - The frontend cannot abort the transfer (short of closing the connection), + The frontend cannot abort the transfer (except by closing the connection + or issuing a Cancel request), but it can discard unwanted CopyData and CopyDone messages. </para> @@ -2013,9 +2015,10 @@ CommandComplete (B) <literal>INSERT <replaceable>oid</replaceable> <replaceable>rows</replaceable></literal>, where <replaceable>rows</replaceable> is the number of rows - inserted, and <replaceable>oid</replaceable> is the object ID - of the inserted row if <Replaceable>rows</Replaceable> is 1, - otherwise <Replaceable>oid</Replaceable> is 0. + inserted. <replaceable>oid</replaceable> is the object ID + of the inserted row if <Replaceable>rows</Replaceable> is 1 + and the target table has OIDs; + otherwise <Replaceable>oid</Replaceable> is 0. </Para> <Para> |