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Update 3.0 protocol support to match recent agreements about how to

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handle multiple 'formats' for data I/O.  Restructure CommandDest and
DestReceiver stuff one more time (it's finally starting to look a bit
clean though).  Code now matches latest 3.0 protocol document as far
as message formats go --- but there is no support for binary I/O yet.
This commit is contained in:
Tom Lane
2003-05-08 18:16:37 +00:00
parent 5e7a5c9511
commit c0a8c3ac13
24 changed files with 1003 additions and 684 deletions
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37
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 1.57 2003/05/06 20:26:27 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/dest.c,v 1.58 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -30,8 +30,10 @@
#include "access/printtup.h"
#include "access/xact.h"
#include "executor/tstoreReceiver.h"
#include "libpq/libpq.h"
#include "libpq/pqformat.h"
#include "utils/portal.h"
/* ----------------
@@ -44,8 +46,7 @@ donothingReceive(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self)
}
static void
donothingStartup(DestReceiver *self, int operation,
const char *portalName, TupleDesc typeinfo, List *targetlist)
donothingStartup(DestReceiver *self, int operation, TupleDesc typeinfo)
{
}
@@ -90,18 +91,21 @@ BeginCommand(const char *commandTag, CommandDest dest)
/* ----------------
* CreateDestReceiver - return appropriate receiver function set for dest
*
* Note: a Portal must be specified for destinations Remote, RemoteExecute,
* and Tuplestore. It can be NULL for the others.
* ----------------
*/
DestReceiver *
CreateDestReceiver(CommandDest dest)
CreateDestReceiver(CommandDest dest, Portal portal)
{
switch (dest)
{
case Remote:
case RemoteInternal:
case RemoteExecute:
case RemoteExecuteInternal:
return printtup_create_DR(dest);
if (portal == NULL)
elog(ERROR, "CreateDestReceiver: no portal specified");
return printtup_create_DR(dest, portal);
case None:
return &donothingDR;
@@ -113,12 +117,13 @@ CreateDestReceiver(CommandDest dest)
return &spi_printtupDR;
case Tuplestore:
/*
* This is disallowed, you must use tstoreReceiver.c's
* specialized function to create a Tuplestore DestReceiver
*/
elog(ERROR, "CreateDestReceiver: cannot handle Tuplestore");
break;
if (portal == NULL)
elog(ERROR, "CreateDestReceiver: no portal specified");
if (portal->holdStore == NULL ||
portal->holdContext == NULL)
elog(ERROR, "CreateDestReceiver: portal has no holdStore");
return CreateTuplestoreDestReceiver(portal->holdStore,
portal->holdContext);
}
/* should never get here */
@@ -135,9 +140,7 @@ EndCommand(const char *commandTag, CommandDest dest)
switch (dest)
{
case Remote:
case RemoteInternal:
case RemoteExecute:
case RemoteExecuteInternal:
pq_puttextmessage('C', commandTag);
break;
@@ -167,9 +170,7 @@ NullCommand(CommandDest dest)
switch (dest)
{
case Remote:
case RemoteInternal:
case RemoteExecute:
case RemoteExecuteInternal:
/*
* tell the fe that we saw an empty query string. In protocols
@@ -206,9 +207,7 @@ ReadyForQuery(CommandDest dest)
switch (dest)
{
case Remote:
case RemoteInternal:
case RemoteExecute:
case RemoteExecuteInternal:
if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 3)
{
StringInfoData buf;