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Add transaction status field to ReadyForQuery messages, and make room

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for tableID/columnID in RowDescription.  (The latter isn't really
implemented yet though --- the backend always sends zeroes, and libpq
just throws away the data.)
This commit is contained in:
Tom Lane
2003-04-26 20:23:00 +00:00
parent 2b1e36c7c0
commit 4db9689d1a
8 changed files with 118 additions and 41 deletions
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14
src/backend/tcop/dest.c
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@@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/tcop/dest.c,v 1.53 2003/04/22 00:08:07 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/dest.c,v 1.54 2003/04/26 20:22:59 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -29,6 +29,7 @@
#include "postgres.h"
#include "access/printtup.h"
#include "access/xact.h"
#include "executor/tstoreReceiver.h"
#include "libpq/libpq.h"
#include "libpq/pqformat.h"
@@ -177,6 +178,7 @@ NullCommand(CommandDest dest)
*
* The ReadyForQuery message is sent in protocol versions 2.0 and up
* so that the FE can tell when we are done processing a query string.
* In versions 3.0 and up, it also carries a transaction state indicator.
*
* Note that by flushing the stdio buffer here, we can avoid doing it
* most other places and thus reduce the number of separate packets sent.
@@ -189,7 +191,15 @@ ReadyForQuery(CommandDest dest)
{
case RemoteInternal:
case Remote:
if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 2)
if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 3)
{
StringInfoData buf;
pq_beginmessage(&buf, 'Z');
pq_sendbyte(&buf, TransactionBlockStatusCode());
pq_endmessage(&buf);
}
else if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 2)
pq_putemptymessage('Z');
/* Flush output at end of cycle in any case. */
pq_flush();