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Another round of protocol changes. Backend-to-frontend messages now all

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have length words.  COPY OUT reimplemented per new protocol: it doesn't
need \. anymore, thank goodness.  COPY BINARY to/from frontend works,
at least as far as the backend is concerned --- libpq's PQgetline API
is not up to snuff, and will have to be replaced with something that is
null-safe.  libpq uses message length words for performance improvement
(no cycles wasted rescanning long messages), but not yet for error
recovery.
This commit is contained in:
Tom Lane
2003-04-22 00:08:07 +00:00
parent ca944bd2d4
commit 5ed27e35f3
22 changed files with 782 additions and 357 deletions
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30
src/backend/access/common/printtup.c
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@ -9,7 +9,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/common/printtup.c,v 1.65 2002/09/04 20:31:08 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/common/printtup.c,v 1.66 2003/04/22 00:08:06 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -77,15 +77,18 @@ static void
printtup_setup(DestReceiver *self, int operation,
const char *portalName, TupleDesc typeinfo)
{
/*
* Send portal name to frontend.
*
* If portal name not specified, use "blank" portal.
*/
if (portalName == NULL)
portalName = "blank";
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
{
/*
* Send portal name to frontend (obsolete cruft, gone in proto 3.0)
*
* If portal name not specified, use "blank" portal.
*/
if (portalName == NULL)
portalName = "blank";
pq_puttextmessage('P', portalName);
pq_puttextmessage('P', portalName);
}
/*
* if this is a retrieve, then we send back the tuple descriptor of
@ -98,8 +101,7 @@ printtup_setup(DestReceiver *self, int operation,
int i;
StringInfoData buf;
pq_beginmessage(&buf);
pq_sendbyte(&buf, 'T'); /* tuple descriptor message type */
pq_beginmessage(&buf, 'T'); /* tuple descriptor message type */
pq_sendint(&buf, natts, 2); /* # of attrs in tuples */
for (i = 0; i < natts; ++i)
@ -174,8 +176,7 @@ printtup(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self)
/*
* tell the frontend to expect new tuple data (in ASCII style)
*/
pq_beginmessage(&buf);
pq_sendbyte(&buf, 'D');
pq_beginmessage(&buf, 'D');
/*
* send a bitmap of which attributes are not null
@ -388,8 +389,7 @@ printtup_internal(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self)
/*
* tell the frontend to expect new tuple data (in binary style)
*/
pq_beginmessage(&buf);
pq_sendbyte(&buf, 'B');
pq_beginmessage(&buf, 'B');
/*
* send a bitmap of which attributes are not null