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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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

228
src/backend/access/common/printtup.c
View File

@ -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 1.70 2003/05/06 20:26:26 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/common/printtup.c,v 1.71 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,12 +20,17 @@
#include "libpq/libpq.h"
#include "libpq/pqformat.h"
#include "utils/lsyscache.h"
#include "utils/portal.h"
static void printtup_startup(DestReceiver *self, int operation,
const char *portalName, TupleDesc typeinfo, List *targetlist);
static void printtup(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self);
static void printtup_internal(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self);
TupleDesc typeinfo);
static void printtup(HeapTuple tuple, TupleDesc typeinfo,
DestReceiver *self);
static void printtup_20(HeapTuple tuple, TupleDesc typeinfo,
DestReceiver *self);
static void printtup_internal_20(HeapTuple tuple, TupleDesc typeinfo,
DestReceiver *self);
static void printtup_shutdown(DestReceiver *self);
static void printtup_destroy(DestReceiver *self);
@ -50,6 +55,7 @@ typedef struct
typedef struct
{
DestReceiver pub; /* publicly-known function pointers */
Portal portal; /* the Portal we are printing from */
bool sendDescrip; /* send RowDescription at startup? */
TupleDesc attrinfo; /* The attr info we are set up for */
int nattrs;
@ -61,43 +67,33 @@ typedef struct
* ----------------
*/
DestReceiver *
printtup_create_DR(CommandDest dest)
printtup_create_DR(CommandDest dest, Portal portal)
{
DR_printtup *self = (DR_printtup *) palloc(sizeof(DR_printtup));
bool isBinary;
bool sendDescrip;
switch (dest)
if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 3)
self->pub.receiveTuple = printtup;
else
{
case Remote:
isBinary = false;
sendDescrip = true;
break;
case RemoteInternal:
isBinary = true;
sendDescrip = true;
break;
case RemoteExecute:
isBinary = false;
sendDescrip = false; /* no T message for Execute */
break;
case RemoteExecuteInternal:
isBinary = true;
sendDescrip = false; /* no T message for Execute */
break;
default:
elog(ERROR, "printtup_create_DR: unsupported dest");
return NULL;
/*
* In protocol 2.0 the Bind message does not exist, so there is
* no way for the columns to have different print formats; it's
* sufficient to look at the first one.
*/
if (portal->formats && portal->formats[0] != 0)
self->pub.receiveTuple = printtup_internal_20;
else
self->pub.receiveTuple = printtup_20;
}
self->pub.receiveTuple = isBinary ? printtup_internal : printtup;
self->pub.startup = printtup_startup;
self->pub.shutdown = printtup_shutdown;
self->pub.destroy = printtup_destroy;
self->pub.mydest = dest;
self->sendDescrip = sendDescrip;
self->portal = portal;
/* Send T message automatically if Remote, but not if RemoteExecute */
self->sendDescrip = (dest == Remote);
self->attrinfo = NULL;
self->nattrs = 0;
@ -107,10 +103,10 @@ printtup_create_DR(CommandDest dest)
}
static void
printtup_startup(DestReceiver *self, int operation,
const char *portalName, TupleDesc typeinfo, List *targetlist)
printtup_startup(DestReceiver *self, int operation, TupleDesc typeinfo)
{
DR_printtup *myState = (DR_printtup *) self;
Portal portal = myState->portal;
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
{
@ -119,7 +115,9 @@ printtup_startup(DestReceiver *self, int operation,
*
* If portal name not specified, use "blank" portal.
*/
if (portalName == NULL)
const char *portalName = portal->name;
if (portalName == NULL || portalName[0] == '\0')
portalName = "blank";
pq_puttextmessage('P', portalName);
@ -130,7 +128,16 @@ printtup_startup(DestReceiver *self, int operation,
* then we send back the tuple descriptor of the tuples.
*/
if (operation == CMD_SELECT && myState->sendDescrip)
SendRowDescriptionMessage(typeinfo, targetlist);
{
List *targetlist;
if (portal->strategy == PORTAL_ONE_SELECT)
targetlist = ((Query *) lfirst(portal->parseTrees))->targetList;
else
targetlist = NIL;
SendRowDescriptionMessage(typeinfo, targetlist, portal->formats);
}
/* ----------------
* We could set up the derived attr info at this time, but we postpone it
@ -150,11 +157,13 @@ printtup_startup(DestReceiver *self, int operation,
* Notes: the TupleDesc has typically been manufactured by ExecTypeFromTL()
* or some similar function; it does not contain a full set of fields.
* The targetlist will be NIL when executing a utility function that does
* not have a plan. If the targetlist isn't NIL then it is a Plan node's
* targetlist; it is up to us to ignore resjunk columns in it.
* not have a plan. If the targetlist isn't NIL then it is a Query node's
* targetlist; it is up to us to ignore resjunk columns in it. The formats[]
* array pointer might be NULL (if we are doing Describe on a prepared stmt);
* send zeroes for the format codes in that case.
*/
void
SendRowDescriptionMessage(TupleDesc typeinfo, List *targetlist)
SendRowDescriptionMessage(TupleDesc typeinfo, List *targetlist, int16 *formats)
{
Form_pg_attribute *attrs = typeinfo->attrs;
int natts = typeinfo->natts;
@ -198,6 +207,14 @@ SendRowDescriptionMessage(TupleDesc typeinfo, List *targetlist)
if (proto >= 2)
pq_sendint(&buf, attrs[i]->atttypmod,
sizeof(attrs[i]->atttypmod));
/* format info appears in protocol 3.0 and up */
if (proto >= 3)
{
if (formats)
pq_sendint(&buf, formats[i], 2);
else
pq_sendint(&buf, 0, 2);
}
}
pq_endmessage(&buf);
}
@ -228,11 +245,98 @@ printtup_prepare_info(DR_printtup *myState, TupleDesc typeinfo, int numAttrs)
}
/* ----------------
* printtup
* printtup --- print a tuple in protocol 3.0
* ----------------
*/
static void
printtup(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self)
{
DR_printtup *myState = (DR_printtup *) self;
int16 *formats = myState->portal->formats;
StringInfoData buf;
int natts = tuple->t_data->t_natts;
int i;
/* Set or update my derived attribute info, if needed */
if (myState->attrinfo != typeinfo || myState->nattrs != natts)
printtup_prepare_info(myState, typeinfo, natts);
/*
* Prepare a DataRow message
*/
pq_beginmessage(&buf, 'D');
pq_sendint(&buf, natts, 2);
/*
* send the attributes of this tuple
*/
for (i = 0; i < natts; ++i)
{
PrinttupAttrInfo *thisState = myState->myinfo + i;
int16 format = (formats ? formats[i] : 0);
Datum origattr,
attr;
bool isnull;
char *outputstr;
origattr = heap_getattr(tuple, i + 1, typeinfo, &isnull);
if (isnull)
{
pq_sendint(&buf, -1, 4);
continue;
}
if (format == 0)
{
if (OidIsValid(thisState->typoutput))
{
/*
* If we have a toasted datum, forcibly detoast it here to
* avoid memory leakage inside the type's output routine.
*/
if (thisState->typisvarlena)
attr = PointerGetDatum(PG_DETOAST_DATUM(origattr));
else
attr = origattr;
outputstr = DatumGetCString(FunctionCall3(&thisState->finfo,
attr,
ObjectIdGetDatum(thisState->typelem),
Int32GetDatum(typeinfo->attrs[i]->atttypmod)));
pq_sendcountedtext(&buf, outputstr, strlen(outputstr), false);
/* Clean up detoasted copy, if any */
if (attr != origattr)
pfree(DatumGetPointer(attr));
pfree(outputstr);
}
else
{
outputstr = "<unprintable>";
pq_sendcountedtext(&buf, outputstr, strlen(outputstr), false);
}
}
else if (format == 1)
{
/* XXX something similar to above */
elog(ERROR, "Binary transmission not implemented yet");
}
else
{
elog(ERROR, "Invalid format code %d", format);
}
}
pq_endmessage(&buf);
}
/* ----------------
* printtup_20 --- print a tuple in protocol 2.0
* ----------------
*/
static void
printtup_20(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self)
{
DR_printtup *myState = (DR_printtup *) self;
StringInfoData buf;
@ -300,7 +404,7 @@ printtup(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self)
ObjectIdGetDatum(thisState->typelem),
Int32GetDatum(typeinfo->attrs[i]->atttypmod)));
pq_sendcountedtext(&buf, outputstr, strlen(outputstr));
pq_sendcountedtext(&buf, outputstr, strlen(outputstr), true);
/* Clean up detoasted copy, if any */
if (attr != origattr)
@ -310,7 +414,7 @@ printtup(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self)
else
{
outputstr = "<unprintable>";
pq_sendcountedtext(&buf, outputstr, strlen(outputstr));
pq_sendcountedtext(&buf, outputstr, strlen(outputstr), true);
}
}
@ -363,38 +467,23 @@ printatt(unsigned attributeId,
attributeP->attbyval ? 't' : 'f');
}
/* ----------------
* showatts
* ----------------
*/
static void
showatts(const char *name, TupleDesc tupleDesc)
{
int natts = tupleDesc->natts;
Form_pg_attribute *attinfo = tupleDesc->attrs;
int i;
puts(name);
for (i = 0; i < natts; ++i)
printatt((unsigned) i + 1, attinfo[i], (char *) NULL);
printf("\t----\n");
}
/* ----------------
* debugStartup - prepare to print tuples for an interactive backend
* ----------------
*/
void
debugStartup(DestReceiver *self, int operation,
const char *portalName, TupleDesc typeinfo, List *targetlist)
debugStartup(DestReceiver *self, int operation, TupleDesc typeinfo)
{
int natts = typeinfo->natts;
Form_pg_attribute *attinfo = typeinfo->attrs;
int i;
/*
* show the return type of the tuples
*/
if (portalName == NULL)
portalName = "blank";
showatts(portalName, typeinfo);
for (i = 0; i < natts; ++i)
printatt((unsigned) i + 1, attinfo[i], (char *) NULL);
printf("\t----\n");
}
/* ----------------
@ -448,15 +537,16 @@ debugtup(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self)
}
/* ----------------
* printtup_internal
* We use a different data prefix, e.g. 'B' instead of 'D' to
* indicate a tuple in internal (binary) form.
* printtup_internal_20 --- print a binary tuple in protocol 2.0
*
* This is largely same as printtup, except we don't use the typout func.
* We use a different message type, i.e. 'B' instead of 'D' to
* indicate a tuple in internal (binary) form.
*
* This is largely same as printtup_20, except we don't use the typout func.
* ----------------
*/
static void
printtup_internal(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self)
printtup_internal_20(HeapTuple tuple, TupleDesc typeinfo, DestReceiver *self)
{
DR_printtup *myState = (DR_printtup *) self;
StringInfoData buf;

28
src/backend/commands/copy.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.197 2003/04/25 02:28:22 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.198 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -125,8 +125,8 @@ static int server_encoding;
/*
* Internal communications functions
*/
static void SendCopyBegin(bool binary);
static void ReceiveCopyBegin(bool binary);
static void SendCopyBegin(bool binary, int natts);
static void ReceiveCopyBegin(bool binary, int natts);
static void SendCopyEnd(bool binary);
static void CopySendData(void *databuf, int datasize);
static void CopySendString(const char *str);
@ -143,15 +143,20 @@ static void CopyDonePeek(int c, bool pickup);
* in past protocol redesigns.
*/
static void
SendCopyBegin(bool binary)
SendCopyBegin(bool binary, int natts)
{
if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 3)
{
/* new way */
StringInfoData buf;
int16 format = (binary ? 1 : 0);
int i;
pq_beginmessage(&buf, 'H');
pq_sendbyte(&buf, binary ? 1 : 0);
pq_sendbyte(&buf, format); /* overall format */
pq_sendint(&buf, natts, 2);
for (i = 0; i < natts; i++)
pq_sendint(&buf, format, 2); /* per-column formats */
pq_endmessage(&buf);
copy_dest = COPY_NEW_FE;
copy_msgbuf = makeStringInfo();
@ -179,15 +184,20 @@ SendCopyBegin(bool binary)
}
static void
ReceiveCopyBegin(bool binary)
ReceiveCopyBegin(bool binary, int natts)
{
if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 3)
{
/* new way */
StringInfoData buf;
int16 format = (binary ? 1 : 0);
int i;
pq_beginmessage(&buf, 'G');
pq_sendbyte(&buf, binary ? 1 : 0);
pq_sendbyte(&buf, format); /* overall format */
pq_sendint(&buf, natts, 2);
for (i = 0; i < natts; i++)
pq_sendint(&buf, format, 2); /* per-column formats */
pq_endmessage(&buf);
copy_dest = COPY_NEW_FE;
copy_msgbuf = makeStringInfo();
@ -682,7 +692,7 @@ DoCopy(const CopyStmt *stmt)
if (pipe)
{
if (IsUnderPostmaster)
ReceiveCopyBegin(binary);
ReceiveCopyBegin(binary, length(attnumlist));
else
copy_file = stdin;
}
@ -724,7 +734,7 @@ DoCopy(const CopyStmt *stmt)
if (pipe)
{
if (IsUnderPostmaster)
SendCopyBegin(binary);
SendCopyBegin(binary, length(attnumlist));
else
copy_file = stdout;
}

4
src/backend/commands/explain.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1994-5, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.108 2003/05/06 20:26:26 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/explain.c,v 1.109 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -179,7 +179,7 @@ ExplainOneQuery(Query *query, ExplainStmt *stmt, TupOutputState *tstate)
plan = planner(query, isCursor, cursorOptions);
/* Create a QueryDesc requesting no output */
queryDesc = CreateQueryDesc(query, plan, None_Receiver, NULL, NULL,
queryDesc = CreateQueryDesc(query, plan, None_Receiver, NULL,
stmt->analyze);
ExplainOnePlan(queryDesc, stmt, tstate);

27
src/backend/commands/portalcmds.c
View File

@ -14,7 +14,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/portalcmds.c,v 1.15 2003/05/06 20:26:26 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/portalcmds.c,v 1.16 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -25,7 +25,6 @@
#include "commands/portalcmds.h"
#include "executor/executor.h"
#include "executor/tstoreReceiver.h"
#include "optimizer/planner.h"
#include "rewrite/rewriteHandler.h"
#include "tcop/pquery.h"
@ -145,7 +144,6 @@ PerformPortalFetch(FetchStmt *stmt,
DestReceiver *dest,
char *completionTag)
{
DestReceiver *mydest = dest;
Portal portal;
long nprocessed;
@ -168,35 +166,21 @@ PerformPortalFetch(FetchStmt *stmt,
return;
}
/*
* Adjust dest if needed. MOVE wants destination None.
*
* If fetching from a binary cursor and the requested destination is
* Remote, change it to RemoteInternal. Note we do NOT change if the
* destination is RemoteExecute --- so the Execute message's format
* specification wins out over the cursor's type.
*/
/* Adjust dest if needed. MOVE wants destination None */
if (stmt->ismove)
mydest = CreateDestReceiver(None);
else if (dest->mydest == Remote &&
(portal->cursorOptions & CURSOR_OPT_BINARY))
mydest = CreateDestReceiver(RemoteInternal);
dest = None_Receiver;
/* Do it */
nprocessed = PortalRunFetch(portal,
stmt->direction,
stmt->howMany,
mydest);
dest);
/* Return command status if wanted */
if (completionTag)
snprintf(completionTag, COMPLETION_TAG_BUFSIZE, "%s %ld",
stmt->ismove ? "MOVE" : "FETCH",
nprocessed);
/* Clean up if we created a local destination */
if (mydest != dest)
(mydest->destroy) (mydest);
}
/*
@ -329,8 +313,7 @@ PersistHoldablePortal(Portal portal)
ExecutorRewind(queryDesc);
/* Change the destination to output to the tuplestore */
queryDesc->dest = CreateTuplestoreDestReceiver(portal->holdStore,
portal->holdContext);
queryDesc->dest = CreateDestReceiver(Tuplestore, portal);
/* Fetch the result set into the tuplestore */
ExecutorRun(queryDesc, ForwardScanDirection, 0L);

4
src/backend/commands/prepare.c
View File

@ -10,7 +10,7 @@
* Copyright (c) 2002-2003, PostgreSQL Global Development Group
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/prepare.c,v 1.17 2003/05/06 21:51:41 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/prepare.c,v 1.18 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -528,7 +528,7 @@ ExplainExecuteQuery(ExplainStmt *stmt, TupOutputState *tstate)
}
/* Create a QueryDesc requesting no output */
qdesc = CreateQueryDesc(query, plan, None_Receiver, NULL,
qdesc = CreateQueryDesc(query, plan, None_Receiver,
paramLI, stmt->analyze);
ExplainOnePlan(qdesc, stmt, tstate);

7
src/backend/executor/execMain.c
View File

@ -26,7 +26,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.208 2003/05/06 20:26:26 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.209 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -217,10 +217,7 @@ ExecutorRun(QueryDesc *queryDesc,
estate->es_processed = 0;
estate->es_lastoid = InvalidOid;
(*dest->startup) (dest, operation,
queryDesc->portalName,
queryDesc->tupDesc,
queryDesc->planstate->plan->targetlist);
(*dest->startup) (dest, operation, queryDesc->tupDesc);
/*
* run plan

5
src/backend/executor/execTuples.c
View File

@ -15,7 +15,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execTuples.c,v 1.65 2003/05/06 20:26:27 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execTuples.c,v 1.66 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -765,8 +765,7 @@ begin_tup_output_tupdesc(DestReceiver *dest, TupleDesc tupdesc)
tstate->metadata = TupleDescGetAttInMetadata(tupdesc);
tstate->dest = dest;
(*tstate->dest->startup) (tstate->dest, (int) CMD_SELECT,
NULL, tupdesc, NIL);
(*tstate->dest->startup) (tstate->dest, (int) CMD_SELECT, tupdesc);
return tstate;
}

4
src/backend/executor/functions.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/functions.c,v 1.64 2003/05/06 20:26:27 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/functions.c,v 1.65 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -245,7 +245,7 @@ postquel_start(execution_state *es, SQLFunctionCachePtr fcache)
{
Assert(es->qd == NULL);
es->qd = CreateQueryDesc(es->query, es->plan,
None_Receiver, NULL,
None_Receiver,
fcache->paramLI, false);
/* Utility commands don't need Executor. */

18
src/backend/executor/spi.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/spi.c,v 1.96 2003/05/06 20:26:27 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/spi.c,v 1.97 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -841,7 +841,8 @@ SPI_cursor_find(const char *name)
void
SPI_cursor_fetch(Portal portal, bool forward, int count)
{
_SPI_cursor_operation(portal, forward, count, CreateDestReceiver(SPI));
_SPI_cursor_operation(portal, forward, count,
CreateDestReceiver(SPI, NULL));
/* we know that the SPI receiver doesn't need a destroy call */
}
@ -880,8 +881,7 @@ SPI_cursor_close(Portal portal)
* of current SPI procedure
*/
void
spi_dest_startup(DestReceiver *self, int operation,
const char *portalName, TupleDesc typeinfo, List *targetlist)
spi_dest_startup(DestReceiver *self, int operation, TupleDesc typeinfo)
{
SPITupleTable *tuptable;
MemoryContext oldcxt;
@ -1035,7 +1035,7 @@ _SPI_execute(const char *src, int tcount, _SPI_plan *plan)
planTree = pg_plan_query(queryTree);
plan_list = lappend(plan_list, planTree);
dest = CreateDestReceiver(queryTree->canSetTag ? SPI : None);
dest = CreateDestReceiver(queryTree->canSetTag ? SPI : None, NULL);
if (queryTree->commandType == CMD_UTILITY)
{
if (IsA(queryTree->utilityStmt, CopyStmt))
@ -1061,7 +1061,7 @@ _SPI_execute(const char *src, int tcount, _SPI_plan *plan)
else if (plan == NULL)
{
qdesc = CreateQueryDesc(queryTree, planTree, dest,
NULL, NULL, false);
NULL, false);
res = _SPI_pquery(qdesc, true,
queryTree->canSetTag ? tcount : 0);
if (res < 0)
@ -1071,7 +1071,7 @@ _SPI_execute(const char *src, int tcount, _SPI_plan *plan)
else
{
qdesc = CreateQueryDesc(queryTree, planTree, dest,
NULL, NULL, false);
NULL, false);
res = _SPI_pquery(qdesc, false, 0);
if (res < 0)
return res;
@ -1150,7 +1150,7 @@ _SPI_execute_plan(_SPI_plan *plan, Datum *Values, const char *Nulls,
planTree = lfirst(plan_list);
plan_list = lnext(plan_list);
dest = CreateDestReceiver(queryTree->canSetTag ? SPI : None);
dest = CreateDestReceiver(queryTree->canSetTag ? SPI : None, NULL);
if (queryTree->commandType == CMD_UTILITY)
{
ProcessUtility(queryTree->utilityStmt, dest, NULL);
@ -1160,7 +1160,7 @@ _SPI_execute_plan(_SPI_plan *plan, Datum *Values, const char *Nulls,
else
{
qdesc = CreateQueryDesc(queryTree, planTree, dest,
NULL, paramLI, false);
paramLI, false);
res = _SPI_pquery(qdesc, true,
queryTree->canSetTag ? tcount : 0);
if (res < 0)

6
src/backend/executor/tstoreReceiver.c
View File

@ -9,7 +9,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/tstoreReceiver.c,v 1.5 2003/05/06 20:26:27 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/tstoreReceiver.c,v 1.6 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -31,9 +31,7 @@ typedef struct
* Prepare to receive tuples from executor.
*/
static void
tstoreStartupReceiver(DestReceiver *self, int operation,
const char *portalname,
TupleDesc typeinfo, List *targetlist)
tstoreStartupReceiver(DestReceiver *self, int operation, TupleDesc typeinfo)
{
/* do nothing */
}

23
src/backend/libpq/pqformat.c
View File

@ -18,7 +18,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/libpq/pqformat.c,v 1.28 2003/04/22 00:08:06 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/libpq/pqformat.c,v 1.29 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -104,27 +104,32 @@ pq_sendbytes(StringInfo buf, const char *data, int datalen)
* pq_sendcountedtext - append a text string (with character set conversion)
*
* The data sent to the frontend by this routine is a 4-byte count field
* (the count includes itself, by convention) followed by the string.
* followed by the string. The count includes itself or not, as per the
* countincludesself flag (pre-3.0 protocol requires it to include itself).
* The passed text string need not be null-terminated, and the data sent
* to the frontend isn't either.
* --------------------------------
*/
void
pq_sendcountedtext(StringInfo buf, const char *str, int slen)
pq_sendcountedtext(StringInfo buf, const char *str, int slen,
bool countincludesself)
{
int extra = countincludesself ? 4 : 0;
char *p;
p = (char *) pg_server_to_client((unsigned char *) str, slen);
if (p != str) /* actual conversion has been done? */
{
slen = strlen(p);
pq_sendint(buf, slen + 4, 4);
pq_sendint(buf, slen + extra, 4);
appendBinaryStringInfo(buf, p, slen);
pfree(p);
return;
}
pq_sendint(buf, slen + 4, 4);
appendBinaryStringInfo(buf, str, slen);
else
{
pq_sendint(buf, slen + extra, 4);
appendBinaryStringInfo(buf, str, slen);
}
}
/* --------------------------------
@ -296,7 +301,7 @@ pq_getmsgbytes(StringInfo msg, int datalen)
{
const char *result;
if (datalen > (msg->len - msg->cursor))
if (datalen < 0 || datalen > (msg->len - msg->cursor))
elog(ERROR, "pq_getmsgbytes: insufficient data left in message");
result = &msg->data[msg->cursor];
msg->cursor += datalen;
@ -312,7 +317,7 @@ pq_getmsgbytes(StringInfo msg, int datalen)
void
pq_copymsgbytes(StringInfo msg, char *buf, int datalen)
{
if (datalen > (msg->len - msg->cursor))
if (datalen < 0 || datalen > (msg->len - msg->cursor))
elog(ERROR, "pq_copymsgbytes: insufficient data left in message");
memcpy(buf, &msg->data[msg->cursor], datalen);
msg->cursor += datalen;

37
src/backend/tcop/dest.c
View File

@ -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;

270
src/backend/tcop/fastpath.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/tcop/fastpath.c,v 1.61 2003/05/05 00:44:56 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/fastpath.c,v 1.62 2003/05/08 18:16:36 tgl Exp $
*
* NOTES
* This cruft is the server side of PQfn.
@ -47,6 +47,34 @@
#include "utils/tqual.h"
/*
* Formerly, this code attempted to cache the function and type info
* looked up by fetch_fp_info, but only for the duration of a single
* transaction command (since in theory the info could change between
* commands). This was utterly useless, because postgres.c executes
* each fastpath call as a separate transaction command, and so the
* cached data could never actually have been reused. If it had worked
* as intended, it would have had problems anyway with dangling references
* in the FmgrInfo struct. So, forget about caching and just repeat the
* syscache fetches on each usage. They're not *that* expensive.
*/
struct fp_info
{
Oid funcid;
FmgrInfo flinfo; /* function lookup info for funcid */
int16 arglen[FUNC_MAX_ARGS];
bool argbyval[FUNC_MAX_ARGS];
int16 retlen;
bool retbyval;
};
static void parse_fcall_arguments(StringInfo msgBuf, struct fp_info *fip,
FunctionCallInfo fcinfo);
static void parse_fcall_arguments_20(StringInfo msgBuf, struct fp_info *fip,
FunctionCallInfo fcinfo);
/* ----------------
* GetOldFunctionMessage
*
@ -121,56 +149,72 @@ SendFunctionResult(Datum retval, bool retbyval, int retlen)
pq_beginmessage(&buf, 'V');
if (retlen != 0)
if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 3)
{
pq_sendbyte(&buf, 'G');
if (retbyval)
{ /* by-value */
pq_sendint(&buf, retlen, 4);
pq_sendint(&buf, DatumGetInt32(retval), retlen);
}
else
{ /* by-reference ... */
if (retlen == -1)
{ /* ... varlena */
struct varlena *v = PG_DETOAST_DATUM(retval);
pq_sendint(&buf, VARSIZE(v) - VARHDRSZ, VARHDRSZ);
pq_sendbytes(&buf, VARDATA(v), VARSIZE(v) - VARHDRSZ);
/* New-style message */
/* XXX replace this with standard binary (or text!) output */
if (retlen != 0)
{
if (retbyval)
{ /* by-value */
pq_sendint(&buf, retlen, 4);
pq_sendint(&buf, DatumGetInt32(retval), retlen);
}
else
{ /* ... fixed */
pq_sendint(&buf, retlen, 4);
pq_sendbytes(&buf, DatumGetPointer(retval), retlen);
{ /* by-reference ... */
if (retlen == -1)
{ /* ... varlena */
struct varlena *v = PG_DETOAST_DATUM(retval);
pq_sendint(&buf, VARSIZE(v) - VARHDRSZ, VARHDRSZ);
pq_sendbytes(&buf, VARDATA(v), VARSIZE(v) - VARHDRSZ);
}
else
{ /* ... fixed */
pq_sendint(&buf, retlen, 4);
pq_sendbytes(&buf, DatumGetPointer(retval), retlen);
}
}
}
else
{
/* NULL marker */
pq_sendint(&buf, -1, 4);
}
}
else
{
/* Old-style message */
if (retlen != 0)
{
pq_sendbyte(&buf, 'G');
if (retbyval)
{ /* by-value */
pq_sendint(&buf, retlen, 4);
pq_sendint(&buf, DatumGetInt32(retval), retlen);
}
else
{ /* by-reference ... */
if (retlen == -1)
{ /* ... varlena */
struct varlena *v = PG_DETOAST_DATUM(retval);
pq_sendint(&buf, VARSIZE(v) - VARHDRSZ, VARHDRSZ);
pq_sendbytes(&buf, VARDATA(v), VARSIZE(v) - VARHDRSZ);
}
else
{ /* ... fixed */
pq_sendint(&buf, retlen, 4);
pq_sendbytes(&buf, DatumGetPointer(retval), retlen);
}
}
}
pq_sendbyte(&buf, '0');
}
pq_sendbyte(&buf, '0');
pq_endmessage(&buf);
}
/*
* Formerly, this code attempted to cache the function and type info
* looked up by fetch_fp_info, but only for the duration of a single
* transaction command (since in theory the info could change between
* commands). This was utterly useless, because postgres.c executes
* each fastpath call as a separate transaction command, and so the
* cached data could never actually have been reused. If it had worked
* as intended, it would have had problems anyway with dangling references
* in the FmgrInfo struct. So, forget about caching and just repeat the
* syscache fetches on each usage. They're not *that* expensive.
*/
struct fp_info
{
Oid funcid;
FmgrInfo flinfo; /* function lookup info for funcid */
int16 arglen[FUNC_MAX_ARGS];
bool argbyval[FUNC_MAX_ARGS];
int16 retlen;
bool retbyval;
};
/*
* fetch_fp_info
*
@ -262,11 +306,9 @@ int
HandleFunctionRequest(StringInfo msgBuf)
{
Oid fid;
int nargs;
AclResult aclresult;
FunctionCallInfoData fcinfo;
Datum retval;
int i;
struct fp_info my_fp;
struct fp_info *fip;
@ -294,9 +336,10 @@ HandleFunctionRequest(StringInfo msgBuf)
/*
* Parse the buffer contents.
*/
(void) pq_getmsgstring(msgBuf); /* dummy string */
if (PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
(void) pq_getmsgstring(msgBuf); /* dummy string */
fid = (Oid) pq_getmsgint(msgBuf, 4); /* function oid */
nargs = pq_getmsgint(msgBuf, 4); /* # of arguments */
/*
* There used to be a lame attempt at caching lookup info here. Now we
@ -316,19 +359,61 @@ HandleFunctionRequest(StringInfo msgBuf)
SetQuerySnapshot();
/*
* Prepare function call info block.
* Prepare function call info block and insert arguments.
*/
MemSet(&fcinfo, 0, sizeof(fcinfo));
fcinfo.flinfo = &fip->flinfo;
if (PG_PROTOCOL_MAJOR(FrontendProtocol) >= 3)
parse_fcall_arguments(msgBuf, fip, &fcinfo);
else
parse_fcall_arguments_20(msgBuf, fip, &fcinfo);
/* Verify we reached the end of the message where expected. */
pq_getmsgend(msgBuf);
/* Okay, do it ... */
retval = FunctionCallInvoke(&fcinfo);
if (fcinfo.isnull)
SendFunctionResult(retval, fip->retbyval, 0);
else
SendFunctionResult(retval, fip->retbyval, fip->retlen);
return 0;
}
/*
* Parse function arguments in a 3.0 protocol message
*/
static void
parse_fcall_arguments(StringInfo msgBuf, struct fp_info *fip,
FunctionCallInfo fcinfo)
{
int nargs;
int i;
int numAFormats;
int16 *aformats = NULL;
/* Get the argument format codes */
numAFormats = pq_getmsgint(msgBuf, 2);
if (numAFormats > 0)
{
aformats = (int16 *) palloc(numAFormats * sizeof(int16));
for (i = 0; i < numAFormats; i++)
aformats[i] = pq_getmsgint(msgBuf, 2);
}
nargs = pq_getmsgint(msgBuf, 2); /* # of arguments */
if (fip->flinfo.fn_nargs != nargs || nargs > FUNC_MAX_ARGS)
elog(ERROR, "HandleFunctionRequest: actual arguments (%d) != registered arguments (%d)",
nargs, fip->flinfo.fn_nargs);
MemSet(&fcinfo, 0, sizeof(fcinfo));
fcinfo.flinfo = &fip->flinfo;
fcinfo.nargs = nargs;
fcinfo->nargs = nargs;
/*
* Copy supplied arguments into arg vector. Note there is no way for
* frontend to specify a NULL argument --- this protocol is misdesigned.
* Copy supplied arguments into arg vector.
*/
for (i = 0; i < nargs; ++i)
{
@ -342,7 +427,7 @@ HandleFunctionRequest(StringInfo msgBuf)
elog(ERROR, "HandleFunctionRequest: bogus argsize %d",
argsize);
/* XXX should we demand argsize == fip->arglen[i] ? */
fcinfo.arg[i] = (Datum) pq_getmsgint(msgBuf, argsize);
fcinfo->arg[i] = (Datum) pq_getmsgint(msgBuf, argsize);
}
else
{ /* by-reference ... */
@ -363,25 +448,70 @@ HandleFunctionRequest(StringInfo msgBuf)
p = palloc(argsize + 1); /* +1 in case argsize is 0 */
pq_copymsgbytes(msgBuf, p, argsize);
}
fcinfo.arg[i] = PointerGetDatum(p);
fcinfo->arg[i] = PointerGetDatum(p);
}
}
/* Verify we reached the end of the message where expected. */
pq_getmsgend(msgBuf);
#ifdef NO_FASTPATH
/* force a NULL return */
retval = (Datum) 0;
fcinfo.isnull = true;
#else
retval = FunctionCallInvoke(&fcinfo);
#endif /* NO_FASTPATH */
if (fcinfo.isnull)
SendFunctionResult(retval, fip->retbyval, 0);
else
SendFunctionResult(retval, fip->retbyval, fip->retlen);
return 0;
/* XXX for the moment, ignore result format code */
(void) pq_getmsgint(msgBuf, 2);
}
/*
* Parse function arguments in a 2.0 protocol message
*/
static void
parse_fcall_arguments_20(StringInfo msgBuf, struct fp_info *fip,
FunctionCallInfo fcinfo)
{
int nargs;
int i;
nargs = pq_getmsgint(msgBuf, 4); /* # of arguments */
if (fip->flinfo.fn_nargs != nargs || nargs > FUNC_MAX_ARGS)
elog(ERROR, "HandleFunctionRequest: actual arguments (%d) != registered arguments (%d)",
nargs, fip->flinfo.fn_nargs);
fcinfo->nargs = nargs;
/*
* Copy supplied arguments into arg vector. Note there is no way for
* frontend to specify a NULL argument --- this protocol is misdesigned.
*/
for (i = 0; i < nargs; ++i)
{
int argsize;
char *p;
argsize = pq_getmsgint(msgBuf, 4);
if (fip->argbyval[i])
{ /* by-value */
if (argsize < 1 || argsize > 4)
elog(ERROR, "HandleFunctionRequest: bogus argsize %d",
argsize);
/* XXX should we demand argsize == fip->arglen[i] ? */
fcinfo->arg[i] = (Datum) pq_getmsgint(msgBuf, argsize);
}
else
{ /* by-reference ... */
if (fip->arglen[i] == -1)
{ /* ... varlena */
if (argsize < 0)
elog(ERROR, "HandleFunctionRequest: bogus argsize %d",
argsize);
p = palloc(argsize + VARHDRSZ);
VARATT_SIZEP(p) = argsize + VARHDRSZ;
pq_copymsgbytes(msgBuf, VARDATA(p), argsize);
}
else
{ /* ... fixed */
if (argsize != fip->arglen[i])
elog(ERROR, "HandleFunctionRequest: bogus argsize %d, should be %d",
argsize, fip->arglen[i]);
p = palloc(argsize + 1); /* +1 in case argsize is 0 */
pq_copymsgbytes(msgBuf, p, argsize);
}
fcinfo->arg[i] = PointerGetDatum(p);
}
}
}

205
src/backend/tcop/postgres.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.339 2003/05/08 14:49:04 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.340 2003/05/08 18:16:36 tgl Exp $
*
* NOTES
* this is the "main" module of the postgres backend and
@ -658,7 +658,6 @@ static void
exec_simple_query(const char *query_string)
{
CommandDest dest = whereToSendOutput;
DestReceiver *receiver;
MemoryContext oldcontext;
List *parsetree_list,
*parsetree_item;
@ -685,12 +684,6 @@ exec_simple_query(const char *query_string)
if (save_log_statement_stats)
ResetUsage();
/*
* Create destination receiver object --- we can reuse it for all
* queries in the string. Note it is created in MessageContext.
*/
receiver = CreateDestReceiver(dest);
/*
* Start up a transaction command. All queries generated by the
* query_string will be in this same command block, *unless* we find a
@ -743,6 +736,8 @@ exec_simple_query(const char *query_string)
List *querytree_list,
*plantree_list;
Portal portal;
DestReceiver *receiver;
int16 format;
/*
* Get the command name for use in status display (it also becomes the
@ -803,11 +798,6 @@ exec_simple_query(const char *query_string)
/* If we got a cancel signal in analysis or planning, quit */
CHECK_FOR_INTERRUPTS();
/*
* Switch back to transaction context for execution.
*/
MemoryContextSwitchTo(oldcontext);
/*
* Create unnamed portal to run the query or queries in.
* If there already is one, silently drop it.
@ -822,16 +812,53 @@ exec_simple_query(const char *query_string)
MessageContext);
/*
* Run the portal to completion, and then drop it.
* Start the portal. No parameters here.
*/
PortalStart(portal, NULL);
/*
* Select the appropriate output format: text unless we are doing
* a FETCH from a binary cursor. (Pretty grotty to have to do this
* here --- but it avoids grottiness in other places. Ah, the joys
* of backward compatibility...)
*/
format = 0; /* TEXT is default */
if (IsA(parsetree, FetchStmt))
{
FetchStmt *stmt = (FetchStmt *) parsetree;
if (!stmt->ismove)
{
Portal fportal = GetPortalByName(stmt->portalname);
if (PortalIsValid(fportal) &&
(fportal->cursorOptions & CURSOR_OPT_BINARY))
format = 1; /* BINARY */
}
}
PortalSetResultFormat(portal, 1, &format);
/*
* Now we can create the destination receiver object.
*/
receiver = CreateDestReceiver(dest, portal);
/*
* Switch back to transaction context for execution.
*/
MemoryContextSwitchTo(oldcontext);
/*
* Run the portal to completion, and then drop it (and the receiver).
*/
(void) PortalRun(portal,
FETCH_ALL,
receiver,
receiver,
completionTag);
(*receiver->destroy) (receiver);
PortalDrop(portal, false);
@ -886,8 +913,6 @@ exec_simple_query(const char *query_string)
if (!parsetree_list)
NullCommand(dest);
(*receiver->destroy) (receiver);
QueryContext = NULL;
/*
@ -1156,8 +1181,12 @@ exec_bind_message(StringInfo input_message)
{
const char *portal_name;
const char *stmt_name;
int is_binary;
int numPFormats;
int16 *pformats = NULL;
int numParams;
int numRFormats;
int16 *rformats = NULL;
int i;
PreparedStatement *pstmt;
Portal portal;
ParamListInfo params;
@ -1173,14 +1202,28 @@ exec_bind_message(StringInfo input_message)
*/
start_xact_command();
/* Switch back to message context */
MemoryContextSwitchTo(MessageContext);
/* Get the fixed part of the message */
portal_name = pq_getmsgstring(input_message);
stmt_name = pq_getmsgstring(input_message);
is_binary = pq_getmsgbyte(input_message);
numParams = pq_getmsgint(input_message, 4);
if (is_binary)
elog(ERROR, "Binary BIND not implemented yet");
/* Get the parameter format codes */
numPFormats = pq_getmsgint(input_message, 2);
if (numPFormats > 0)
{
pformats = (int16 *) palloc(numPFormats * sizeof(int16));
for (i = 0; i < numPFormats; i++)
pformats[i] = pq_getmsgint(input_message, 2);
}
/* Get the parameter value count */
numParams = pq_getmsgint(input_message, 2);
if (numPFormats > 1 && numPFormats != numParams)
elog(ERROR, "BIND message has %d parameter formats but %d parameters",
numPFormats, numParams);
/* Find prepared statement */
if (stmt_name[0] != '\0')
@ -1217,45 +1260,98 @@ exec_bind_message(StringInfo input_message)
* Fetch parameters, if any, and store in the portal's memory context.
*
* In an aborted transaction, we can't risk calling user-defined functions,
* so bind all parameters to null values.
* but we can't fail to Bind either, so bind all parameters to null values.
*/
if (numParams > 0)
{
bool isaborted = IsAbortedTransactionBlockState();
int i = 0;
StringInfoData pbuf;
List *l;
MemoryContext oldContext;
/* Note that the string buffer lives in MessageContext */
initStringInfo(&pbuf);
oldContext = MemoryContextSwitchTo(PortalGetHeapMemory(portal));
params = (ParamListInfo)
palloc0((numParams + 1) * sizeof(ParamListInfoData));
i = 0;
foreach(l, pstmt->argtype_list)
{
Oid ptype = lfirsto(l);
int32 plength;
bool isNull;
isNull = (pq_getmsgbyte(input_message) != 0) ? false : true;
plength = pq_getmsgint(input_message, 4);
isNull = (plength == -1);
if (!isNull)
{
const char *ptext = pq_getmsgstring(input_message);
/* Reset pbuf to empty, and insert raw data into it */
pbuf.len = 0;
pbuf.data[0] = '\0';
pbuf.cursor = 0;
appendBinaryStringInfo(&pbuf,
pq_getmsgbytes(input_message, plength),
plength);
if (isaborted)
{
/* We don't bother to check the format in this case */
isNull = true;
}
else
{
Oid typInput;
Oid typElem;
int16 pformat;
getTypeInputInfo(ptype, &typInput, &typElem);
params[i].value =
OidFunctionCall3(typInput,
CStringGetDatum(ptext),
ObjectIdGetDatum(typElem),
Int32GetDatum(-1));
if (numPFormats > 1)
pformat = pformats[i];
else if (numPFormats > 0)
pformat = pformats[0];
else
pformat = 0; /* default = text */
if (pformat == 0)
{
Oid typInput;
Oid typElem;
char *pstring;
getTypeInputInfo(ptype, &typInput, &typElem);
/*
* Since stringinfo.c keeps a trailing null in
* place even for binary data, the contents of
* pbuf are a valid C string. We have to do
* encoding conversion before calling the typinput
* routine, though.
*/
pstring = (char *)
pg_client_to_server((unsigned char *) pbuf.data,
plength);
params[i].value =
OidFunctionCall3(typInput,
CStringGetDatum(pstring),
ObjectIdGetDatum(typElem),
Int32GetDatum(-1));
/* Free result of encoding conversion, if any */
if (pstring != pbuf.data)
pfree(pstring);
}
else if (pformat == 1)
{
/* XXX something similar to above */
elog(ERROR, "Binary BIND not implemented yet");
}
else
{
elog(ERROR, "Invalid format code %d", pformat);
}
}
}
params[i].kind = PARAM_NUM;
params[i].id = i + 1;
params[i].isnull = isNull;
@ -1270,6 +1366,15 @@ exec_bind_message(StringInfo input_message)
else
params = NULL;
/* Get the result format codes */
numRFormats = pq_getmsgint(input_message, 2);
if (numRFormats > 0)
{
rformats = (int16 *) palloc(numRFormats * sizeof(int16));
for (i = 0; i < numRFormats; i++)
rformats[i] = pq_getmsgint(input_message, 2);
}
pq_getmsgend(input_message);
/*
@ -1277,6 +1382,11 @@ exec_bind_message(StringInfo input_message)
*/
PortalStart(portal, params);
/*
* Apply the result format requests to the portal.
*/
PortalSetResultFormat(portal, numRFormats, rformats);
/*
* Send BindComplete.
*/
@ -1290,7 +1400,7 @@ exec_bind_message(StringInfo input_message)
* Process an "Execute" message for a portal
*/
static void
exec_execute_message(const char *portal_name, int is_binary, long max_rows)
exec_execute_message(const char *portal_name, long max_rows)
{
CommandDest dest;
DestReceiver *receiver;
@ -1303,7 +1413,7 @@ exec_execute_message(const char *portal_name, int is_binary, long max_rows)
/* Adjust destination to tell printtup.c what to do */
dest = whereToSendOutput;
if (dest == Remote)
dest = is_binary ? RemoteExecuteInternal : RemoteExecute;
dest = RemoteExecute;
portal = GetPortalByName(portal_name);
if (!PortalIsValid(portal))
@ -1352,6 +1462,12 @@ exec_execute_message(const char *portal_name, int is_binary, long max_rows)
}
}
/*
* Create dest receiver in MessageContext (we don't want it in transaction
* context, because that may get deleted if portal contains VACUUM).
*/
receiver = CreateDestReceiver(dest, portal);
/*
* Ensure we are in a transaction command (this should normally be
* the case already due to prior BIND).
@ -1375,8 +1491,6 @@ exec_execute_message(const char *portal_name, int is_binary, long max_rows)
/*
* Okay to run the portal.
*/
receiver = CreateDestReceiver(dest);
if (max_rows <= 0)
max_rows = FETCH_ALL;
@ -1451,7 +1565,7 @@ exec_describe_statement_message(const char *stmt_name)
* First describe the parameters...
*/
pq_beginmessage(&buf, 't'); /* parameter description message type */
pq_sendint(&buf, length(pstmt->argtype_list), 4);
pq_sendint(&buf, length(pstmt->argtype_list), 2);
foreach(l, pstmt->argtype_list)
{
@ -1473,7 +1587,7 @@ exec_describe_statement_message(const char *stmt_name)
targetlist = ((Query *) lfirst(pstmt->query_list))->targetList;
else
targetlist = NIL;
SendRowDescriptionMessage(tupdesc, targetlist);
SendRowDescriptionMessage(tupdesc, targetlist, NULL);
}
else
pq_putemptymessage('n'); /* NoData */
@ -1502,10 +1616,11 @@ exec_describe_portal_message(const char *portal_name)
List *targetlist;
if (portal->strategy == PORTAL_ONE_SELECT)
targetlist = ((Plan *) lfirst(portal->planTrees))->targetlist;
targetlist = ((Query *) lfirst(portal->parseTrees))->targetList;
else
targetlist = NIL;
SendRowDescriptionMessage(portal->tupDesc, targetlist);
SendRowDescriptionMessage(portal->tupDesc, targetlist,
portal->formats);
}
else
pq_putemptymessage('n'); /* NoData */
@ -2397,7 +2512,7 @@ PostgresMain(int argc, char *argv[], const char *username)
if (!IsUnderPostmaster)
{
puts("\nPOSTGRES backend interactive interface ");
puts("$Revision: 1.339 $ $Date: 2003/05/08 14:49:04 $\n");
puts("$Revision: 1.340 $ $Date: 2003/05/08 18:16:36 $\n");
}
/*
@ -2613,7 +2728,7 @@ PostgresMain(int argc, char *argv[], const char *username)
stmt_name = pq_getmsgstring(input_message);
query_string = pq_getmsgstring(input_message);
numParams = pq_getmsgint(input_message, 4);
numParams = pq_getmsgint(input_message, 2);
if (numParams > 0)
{
int i;
@ -2640,15 +2755,13 @@ PostgresMain(int argc, char *argv[], const char *username)
case 'E': /* execute */
{
const char *portal_name;
int is_binary;
int max_rows;
portal_name = pq_getmsgstring(input_message);
is_binary = pq_getmsgbyte(input_message);
max_rows = pq_getmsgint(input_message, 4);
pq_getmsgend(input_message);
exec_execute_message(portal_name, is_binary, max_rows);
exec_execute_message(portal_name, max_rows);
}
break;

82
src/backend/tcop/pquery.c
View File

@ -8,14 +8,13 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/tcop/pquery.c,v 1.63 2003/05/06 21:01:04 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/pquery.c,v 1.64 2003/05/08 18:16:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "executor/executor.h"
#include "executor/tstoreReceiver.h"
#include "miscadmin.h"
#include "tcop/tcopprot.h"
#include "tcop/pquery.h"
@ -47,7 +46,6 @@ QueryDesc *
CreateQueryDesc(Query *parsetree,
Plan *plantree,
DestReceiver *dest,
const char *portalName,
ParamListInfo params,
bool doInstrument)
{
@ -57,7 +55,6 @@ CreateQueryDesc(Query *parsetree,
qd->parsetree = parsetree; /* parse tree */
qd->plantree = plantree; /* plan */
qd->dest = dest; /* output dest */
qd->portalName = portalName; /* name, if dest is a portal */
qd->params = params; /* parameter values passed into query */
qd->doInstrument = doInstrument; /* instrumentation wanted? */
@ -89,7 +86,6 @@ FreeQueryDesc(QueryDesc *qdesc)
* parsetree: the query tree
* plan: the plan tree for the query
* params: any parameters needed
* portalName: name of portal being used
* dest: where to send results
* completionTag: points to a buffer of size COMPLETION_TAG_BUFSIZE
* in which to store a command completion status string.
@ -103,7 +99,6 @@ void
ProcessQuery(Query *parsetree,
Plan *plan,
ParamListInfo params,
const char *portalName,
DestReceiver *dest,
char *completionTag)
{
@ -131,8 +126,7 @@ ProcessQuery(Query *parsetree,
/*
* Create the QueryDesc object
*/
queryDesc = CreateQueryDesc(parsetree, plan, dest, portalName, params,
false);
queryDesc = CreateQueryDesc(parsetree, plan, dest, params, false);
/*
* Call ExecStart to prepare the plan for execution
@ -269,7 +263,6 @@ PortalStart(Portal portal, ParamListInfo params)
queryDesc = CreateQueryDesc((Query *) lfirst(portal->parseTrees),
(Plan *) lfirst(portal->planTrees),
None_Receiver,
portal->name,
params,
false);
/*
@ -281,7 +274,7 @@ PortalStart(Portal portal, ParamListInfo params)
*/
portal->queryDesc = queryDesc;
/*
* Remember tuple descriptor
* Remember tuple descriptor (computed by ExecutorStart)
*/
portal->tupDesc = queryDesc->tupDesc;
/*
@ -320,6 +313,53 @@ PortalStart(Portal portal, ParamListInfo params)
portal->portalReady = true;
}
/*
* PortalSetResultFormat
* Select the format codes for a portal's output.
*
* This must be run after PortalStart for a portal that will be read by
* a Remote or RemoteExecute destination. It is not presently needed for
* other destination types.
*
* formats[] is the client format request, as per Bind message conventions.
*/
void
PortalSetResultFormat(Portal portal, int nFormats, int16 *formats)
{
int natts;
int i;
/* Do nothing if portal won't return tuples */
if (portal->tupDesc == NULL)
return;
natts = portal->tupDesc->natts;
/* +1 avoids palloc(0) if no columns */
portal->formats = (int16 *)
MemoryContextAlloc(PortalGetHeapMemory(portal),
(natts + 1) * sizeof(int16));
if (nFormats > 1)
{
/* format specified for each column */
if (nFormats != natts)
elog(ERROR, "BIND message has %d result formats but query has %d columns",
nFormats, natts);
memcpy(portal->formats, formats, natts * sizeof(int16));
} else if (nFormats > 0)
{
/* single format specified, use for all columns */
int16 format1 = formats[0];
for (i = 0; i < natts; i++)
portal->formats[i] = format1;
}
else
{
/* use default format for all columns */
for (i = 0; i < natts; i++)
portal->formats[i] = 0;
}
}
/*
* PortalRun
* Run a portal's query or queries.
@ -399,8 +439,7 @@ PortalRun(Portal portal, long count,
DestReceiver *treceiver;
PortalCreateHoldStore(portal);
treceiver = CreateTuplestoreDestReceiver(portal->holdStore,
portal->holdContext);
treceiver = CreateDestReceiver(Tuplestore, portal);
PortalRunUtility(portal, lfirst(portal->parseTrees),
treceiver, NULL);
(*treceiver->destroy) (treceiver);
@ -604,16 +643,9 @@ static uint32
RunFromStore(Portal portal, ScanDirection direction, long count,
DestReceiver *dest)
{
List *targetlist;
long current_tuple_count = 0;
if (portal->strategy == PORTAL_ONE_SELECT)
targetlist = ((Plan *) lfirst(portal->planTrees))->targetlist;
else
targetlist = NIL;
(*dest->startup) (dest, CMD_SELECT, portal->name, portal->tupDesc,
targetlist);
(*dest->startup) (dest, CMD_SELECT, portal->tupDesc);
if (direction == NoMovementScanDirection)
{
@ -737,11 +769,9 @@ PortalRunMulti(Portal portal,
* but the results will be discarded unless you use "simple Query"
* protocol.
*/
if (dest->mydest == RemoteExecute ||
dest->mydest == RemoteExecuteInternal)
if (dest->mydest == RemoteExecute)
dest = None_Receiver;
if (altdest->mydest == RemoteExecute ||
altdest->mydest == RemoteExecuteInternal)
if (altdest->mydest == RemoteExecute)
altdest = None_Receiver;
/*
@ -791,14 +821,14 @@ PortalRunMulti(Portal portal,
{
/* statement can set tag string */
ProcessQuery(query, plan,
portal->portalParams, portal->name,
portal->portalParams,
dest, completionTag);
}
else
{
/* stmt added by rewrite cannot set tag */
ProcessQuery(query, plan,
portal->portalParams, portal->name,
portal->portalParams,
altdest, NULL);
}

11
src/include/access/printtup.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: printtup.h,v 1.26 2003/05/06 20:26:27 tgl Exp $
* $Id: printtup.h,v 1.27 2003/05/08 18:16:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -16,18 +16,19 @@
#include "tcop/dest.h"
extern DestReceiver *printtup_create_DR(CommandDest dest);
extern DestReceiver *printtup_create_DR(CommandDest dest, Portal portal);
extern void SendRowDescriptionMessage(TupleDesc typeinfo, List *targetlist);
extern void SendRowDescriptionMessage(TupleDesc typeinfo, List *targetlist,
int16 *formats);
extern void debugStartup(DestReceiver *self, int operation,
const char *portalName, TupleDesc typeinfo, List *targetlist);
TupleDesc typeinfo);
extern void debugtup(HeapTuple tuple, TupleDesc typeinfo,
DestReceiver *self);
/* XXX these are really in executor/spi.c */
extern void spi_dest_startup(DestReceiver *self, int operation,
const char *portalName, TupleDesc typeinfo, List *targetlist);
TupleDesc typeinfo);
extern void spi_printtup(HeapTuple tuple, TupleDesc typeinfo,
DestReceiver *self);

5
src/include/executor/execdesc.h
View File

@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: execdesc.h,v 1.23 2003/05/06 20:26:28 tgl Exp $
* $Id: execdesc.h,v 1.24 2003/05/08 18:16:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -34,7 +34,6 @@ typedef struct QueryDesc
Query *parsetree; /* rewritten parsetree */
Plan *plantree; /* planner's output */
DestReceiver *dest; /* the destination for tuple output */
const char *portalName; /* name of portal, or NULL */
ParamListInfo params; /* param values being passed in */
bool doInstrument; /* TRUE requests runtime instrumentation */
@ -46,7 +45,7 @@ typedef struct QueryDesc
/* in pquery.c */
extern QueryDesc *CreateQueryDesc(Query *parsetree, Plan *plantree,
DestReceiver *dest, const char *portalName,
DestReceiver *dest,
ParamListInfo params,
bool doInstrument);

4
src/include/libpq/pqcomm.h
View File

@ -9,7 +9,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: pqcomm.h,v 1.83 2003/05/06 21:51:42 tgl Exp $
* $Id: pqcomm.h,v 1.84 2003/05/08 18:16:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -106,7 +106,7 @@ typedef union SockAddr
/* The earliest and latest frontend/backend protocol version supported. */
#define PG_PROTOCOL_EARLIEST PG_PROTOCOL(1,0)
#define PG_PROTOCOL_LATEST PG_PROTOCOL(3,107) /* XXX temporary value */
#define PG_PROTOCOL_LATEST PG_PROTOCOL(3,108) /* XXX temporary value */
typedef uint32 ProtocolVersion; /* FE/BE protocol version number */

5
src/include/libpq/pqformat.h
View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: pqformat.h,v 1.15 2003/04/22 00:08:07 tgl Exp $
* $Id: pqformat.h,v 1.16 2003/05/08 18:16:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -18,7 +18,8 @@
extern void pq_beginmessage(StringInfo buf, char msgtype);
extern void pq_sendbyte(StringInfo buf, int byt);
extern void pq_sendbytes(StringInfo buf, const char *data, int datalen);
extern void pq_sendcountedtext(StringInfo buf, const char *str, int slen);
extern void pq_sendcountedtext(StringInfo buf, const char *str, int slen,
bool countincludesself);
extern void pq_sendstring(StringInfo buf, const char *str);
extern void pq_sendint(StringInfo buf, int i, int b);
extern void pq_endmessage(StringInfo buf);

25
src/include/tcop/dest.h
View File

@ -54,7 +54,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: dest.h,v 1.37 2003/05/06 20:26:28 tgl Exp $
* $Id: dest.h,v 1.38 2003/05/08 18:16:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -82,12 +82,9 @@ typedef enum
None, /* results are discarded */
Debug, /* results go to debugging output */
Remote, /* results sent to frontend process */
RemoteInternal, /* results sent to frontend process in
* internal (binary) form */
SPI, /* results sent to SPI manager */
Tuplestore, /* results sent to Tuplestore */
RemoteExecute, /* sent to frontend, in Execute command */
RemoteExecuteInternal /* same, but binary format */
SPI, /* results sent to SPI manager */
Tuplestore /* results sent to Tuplestore */
} CommandDest;
/* ----------------
@ -106,13 +103,13 @@ typedef struct _DestReceiver DestReceiver;
struct _DestReceiver
{
/* Called for each tuple to be output: */
void (*receiveTuple) (HeapTuple tuple, TupleDesc typeinfo,
void (*receiveTuple) (HeapTuple tuple,
TupleDesc typeinfo,
DestReceiver *self);
/* Per-executor-run initialization and shutdown: */
void (*startup) (DestReceiver *self, int operation,
const char *portalName,
TupleDesc typeinfo,
List *targetlist);
void (*startup) (DestReceiver *self,
int operation,
TupleDesc typeinfo);
void (*shutdown) (DestReceiver *self);
/* Destroy the receiver object itself (if dynamically allocated) */
void (*destroy) (DestReceiver *self);
@ -123,10 +120,14 @@ struct _DestReceiver
extern DestReceiver *None_Receiver; /* permanent receiver for None */
/* This is a forward reference to utils/portal.h */
typedef struct PortalData *Portal;
/* The primary destination management functions */
extern void BeginCommand(const char *commandTag, CommandDest dest);
extern DestReceiver *CreateDestReceiver(CommandDest dest);
extern DestReceiver *CreateDestReceiver(CommandDest dest, Portal portal);
extern void EndCommand(const char *commandTag, CommandDest dest);
/* Additional functions that go with destination management, more or less. */

6
src/include/tcop/pquery.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: pquery.h,v 1.26 2003/05/06 20:26:28 tgl Exp $
* $Id: pquery.h,v 1.27 2003/05/08 18:16:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,7 +20,6 @@
extern void ProcessQuery(Query *parsetree,
Plan *plan,
ParamListInfo params,
const char *portalName,
DestReceiver *dest,
char *completionTag);
@ -28,6 +27,9 @@ extern PortalStrategy ChoosePortalStrategy(List *parseTrees);
extern void PortalStart(Portal portal, ParamListInfo params);
extern void PortalSetResultFormat(Portal portal, int nFormats,
int16 *formats);
extern bool PortalRun(Portal portal, long count,
DestReceiver *dest, DestReceiver *altdest,
char *completionTag);

9
src/include/utils/portal.h
View File

@ -39,7 +39,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: portal.h,v 1.43 2003/05/06 20:26:28 tgl Exp $
* $Id: portal.h,v 1.44 2003/05/08 18:16:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -79,7 +79,10 @@ typedef enum PortalStrategy
PORTAL_MULTI_QUERY
} PortalStrategy;
typedef struct PortalData *Portal;
/*
* Note: typedef Portal is declared in tcop/dest.h as
* typedef struct PortalData *Portal;
*/
typedef struct PortalData
{
@ -119,6 +122,8 @@ typedef struct PortalData
/* If portal returns tuples, this is their tupdesc: */
TupleDesc tupDesc; /* descriptor for result tuples */
/* and these are the format codes to use for the columns: */
int16 *formats; /* a format code for each column */
/*
* Where we store tuples for a held cursor or a PORTAL_UTIL_SELECT query.

670
src/interfaces/libpq/fe-exec.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-exec.c,v 1.134 2003/04/26 20:22:59 tgl Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-exec.c,v 1.135 2003/05/08 18:16:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -55,250 +55,10 @@ static void parseInput(PGconn *conn);
static void handleSendFailure(PGconn *conn);
static void handleSyncLoss(PGconn *conn, char id, int msgLength);
static int getRowDescriptions(PGconn *conn);
static int getAnotherTuple(PGconn *conn, int binary);
static int getAnotherTuple(PGconn *conn);
static int getParameterStatus(PGconn *conn);
static int getNotify(PGconn *conn);
/* ---------------
* Escaping arbitrary strings to get valid SQL strings/identifiers.
*
* Replaces "\\" with "\\\\" and "'" with "''".
* length is the length of the buffer pointed to by
* from. The buffer at to must be at least 2*length + 1 characters
* long. A terminating NUL character is written.
* ---------------
*/
size_t
PQescapeString(char *to, const char *from, size_t length)
{
const char *source = from;
char *target = to;
unsigned int remaining = length;
while (remaining > 0)
{
switch (*source)
{
case '\\':
*target = '\\';
target++;
*target = '\\';
/* target and remaining are updated below. */
break;
case '\'':
*target = '\'';
target++;
*target = '\'';
/* target and remaining are updated below. */
break;
default:
*target = *source;
/* target and remaining are updated below. */
}
source++;
target++;
remaining--;
}
/* Write the terminating NUL character. */
*target = '\0';
return target - to;
}
/*
* PQescapeBytea - converts from binary string to the
* minimal encoding necessary to include the string in an SQL
* INSERT statement with a bytea type column as the target.
*
* The following transformations are applied
* '\0' == ASCII 0 == \\000
* '\'' == ASCII 39 == \'
* '\\' == ASCII 92 == \\\\
* anything >= 0x80 ---> \\ooo (where ooo is an octal expression)
*/
unsigned char *
PQescapeBytea(const unsigned char *bintext, size_t binlen, size_t *bytealen)
{
const unsigned char *vp;
unsigned char *rp;
unsigned char *result;
size_t i;
size_t len;
/*
* empty string has 1 char ('\0')
*/
len = 1;
vp = bintext;
for (i = binlen; i > 0; i--, vp++)
{
if (*vp == 0 || *vp >= 0x80)
len += 5; /* '5' is for '\\ooo' */
else if (*vp == '\'')
len += 2;
else if (*vp == '\\')
len += 4;
else
len++;
}
rp = result = (unsigned char *) malloc(len);
if (rp == NULL)
return NULL;
vp = bintext;
*bytealen = len;
for (i = binlen; i > 0; i--, vp++)
{
if (*vp == 0 || *vp >= 0x80)
{
(void) sprintf(rp, "\\\\%03o", *vp);
rp += 5;
}
else if (*vp == '\'')
{
rp[0] = '\\';
rp[1] = '\'';
rp += 2;
}
else if (*vp == '\\')
{
rp[0] = '\\';
rp[1] = '\\';
rp[2] = '\\';
rp[3] = '\\';
rp += 4;
}
else
*rp++ = *vp;
}
*rp = '\0';
return result;
}
/*
* PQunescapeBytea - converts the null terminated string representation
* of a bytea, strtext, into binary, filling a buffer. It returns a
* pointer to the buffer which is NULL on error, and the size of the
* buffer in retbuflen. The pointer may subsequently be used as an
* argument to the function free(3). It is the reverse of PQescapeBytea.
*
* The following transformations are reversed:
* '\0' == ASCII 0 == \000
* '\'' == ASCII 39 == \'
* '\\' == ASCII 92 == \\
*
* States:
* 0 normal 0->1->2->3->4
* 1 \ 1->5
* 2 \0 1->6
* 3 \00
* 4 \000
* 5 \'
* 6 \\
*/
unsigned char *
PQunescapeBytea(const unsigned char *strtext, size_t *retbuflen)
{
size_t buflen;
unsigned char *buffer,
*bp;
const unsigned char *sp;
unsigned int state = 0;
if (strtext == NULL)
return NULL;
buflen = strlen(strtext); /* will shrink, also we discover if
* strtext */
buffer = (unsigned char *) malloc(buflen); /* isn't NULL terminated */
if (buffer == NULL)
return NULL;
for (bp = buffer, sp = strtext; *sp != '\0'; bp++, sp++)
{
switch (state)
{
case 0:
if (*sp == '\\')
state = 1;
*bp = *sp;
break;
case 1:
if (*sp == '\'') /* state=5 */
{ /* replace \' with 39 */
bp--;
*bp = '\'';
buflen--;
state = 0;
}
else if (*sp == '\\') /* state=6 */
{ /* replace \\ with 92 */
bp--;
*bp = '\\';
buflen--;
state = 0;
}
else
{
if (isdigit(*sp))
state = 2;
else
state = 0;
*bp = *sp;
}
break;
case 2:
if (isdigit(*sp))
state = 3;
else
state = 0;
*bp = *sp;
break;
case 3:
if (isdigit(*sp)) /* state=4 */
{
int v;
bp -= 3;
sscanf(sp - 2, "%03o", &v);
*bp = v;
buflen -= 3;
state = 0;
}
else
{
*bp = *sp;
state = 0;
}
break;
}
}
buffer = realloc(buffer, buflen);
if (buffer == NULL)
return NULL;
*retbuflen = buflen;
return buffer;
}
/*
* PQfreemem - safely frees memory allocated
*
* Needed mostly by Win32, unless multithreaded DLL (/MD in VC6)
* Used for freeing memory from PQescapeByte()a/PQunescapeBytea()
*/
void PQfreemem(void *ptr)
{
free(ptr);
}
/* ----------------
* Space management for PGresult.
@ -909,7 +669,7 @@ parseInput(PGconn *conn)
return;
}
if (msgLength > 30000 &&
!(id == 'T' || id == 'D' || id == 'B' || id == 'd'))
!(id == 'T' || id == 'D' || id == 'd'))
{
handleSyncLoss(conn, id, msgLength);
return;
@ -1074,11 +834,11 @@ parseInput(PGconn *conn)
return;
}
break;
case 'D': /* ASCII data tuple */
case 'D': /* Data Row */
if (conn->result != NULL)
{
/* Read another tuple of a normal query response */
if (getAnotherTuple(conn, FALSE))
if (getAnotherTuple(conn))
return;
}
else
@ -1090,30 +850,18 @@ parseInput(PGconn *conn)
conn->inCursor += msgLength;
}
break;
case 'B': /* Binary data tuple */
if (conn->result != NULL)
{
/* Read another tuple of a normal query response */
if (getAnotherTuple(conn, TRUE))
return;
}
else
{
snprintf(noticeWorkspace, sizeof(noticeWorkspace),
libpq_gettext("server sent binary data (\"B\" message) without prior row description (\"T\" message)\n"));
DONOTICE(conn, noticeWorkspace);
/* Discard the unexpected message */
conn->inCursor += msgLength;
}
break;
case 'G': /* Start Copy In */
if (pqGetc(&conn->copy_is_binary, conn))
return;
/* XXX we currently ignore the rest of the message */
conn->inCursor = conn->inStart + 5 + msgLength;
conn->asyncStatus = PGASYNC_COPY_IN;
break;
case 'H': /* Start Copy Out */
if (pqGetc(&conn->copy_is_binary, conn))
return;
/* XXX we currently ignore the rest of the message */
conn->inCursor = conn->inStart + 5 + msgLength;
conn->asyncStatus = PGASYNC_COPY_OUT;
conn->copy_already_done = 0;
break;
@ -1229,13 +977,15 @@ getRowDescriptions(PGconn *conn)
int typid;
int typlen;
int atttypmod;
int format;
if (pqGets(&conn->workBuffer, conn) ||
pqGetInt(&tableid, 4, conn) ||
pqGetInt(&columnid, 2, conn) ||
pqGetInt(&typid, 4, conn) ||
pqGetInt(&typlen, 2, conn) ||
pqGetInt(&atttypmod, 4, conn))
pqGetInt(&atttypmod, 4, conn) ||
pqGetInt(&format, 2, conn))
{
PQclear(result);
return EOF;
@ -1247,13 +997,14 @@ getRowDescriptions(PGconn *conn)
*/
columnid = (int) ((int16) columnid);
typlen = (int) ((int16) typlen);
format = (int) ((int16) format);
result->attDescs[i].name = pqResultStrdup(result,
conn->workBuffer.data);
result->attDescs[i].typid = typid;
result->attDescs[i].typlen = typlen;
result->attDescs[i].atttypmod = atttypmod;
/* XXX todo: save tableid/columnid too */
/* XXX todo: save tableid/columnid, format too */
}
/* Success! */
@ -1262,7 +1013,7 @@ getRowDescriptions(PGconn *conn)
}
/*
* parseInput subroutine to read a 'B' or 'D' (row data) message.
* parseInput subroutine to read a 'D' (row data) message.
* We add another tuple to the existing PGresult structure.
* Returns: 0 if completed message, EOF if error or not enough data yet.
*
@ -1272,23 +1023,14 @@ getRowDescriptions(PGconn *conn)
*/
static int
getAnotherTuple(PGconn *conn, int binary)
getAnotherTuple(PGconn *conn)
{
PGresult *result = conn->result;
int nfields = result->numAttributes;
PGresAttValue *tup;
/* the backend sends us a bitmap of which attributes are null */
char std_bitmap[64]; /* used unless it doesn't fit */
char *bitmap = std_bitmap;
int i;
size_t nbytes; /* the number of bytes in bitmap */
char bmap; /* One byte of the bitmap */
int bitmap_index; /* Its index */
int bitcnt; /* number of bits examined in current byte */
int tupnfields; /* # fields from tuple */
int vlen; /* length of the current field value */
result->binary = binary;
int i;
/* Allocate tuple space if first time for this data message */
if (conn->curTuple == NULL)
@ -1301,61 +1043,50 @@ getAnotherTuple(PGconn *conn, int binary)
}
tup = conn->curTuple;
/* Get the null-value bitmap */
nbytes = (nfields + BYTELEN - 1) / BYTELEN;
/* malloc() only for unusually large field counts... */
if (nbytes > sizeof(std_bitmap))
bitmap = (char *) malloc(nbytes);
/* Get the field count and make sure it's what we expect */
if (pqGetInt(&tupnfields, 2, conn))
return EOF;
if (pqGetnchar(bitmap, nbytes, conn))
goto EOFexit;
if (tupnfields != nfields)
{
/* Replace partially constructed result with an error result */
pqClearAsyncResult(conn);
printfPQExpBuffer(&conn->errorMessage,
libpq_gettext("unexpected field count in D message\n"));
saveErrorResult(conn);
conn->asyncStatus = PGASYNC_READY;
/* Discard the failed message by pretending we read it */
return 0;
}
/* Scan the fields */
bitmap_index = 0;
bmap = bitmap[bitmap_index];
bitcnt = 0;
for (i = 0; i < nfields; i++)
{
if (!(bmap & 0200))
/* get the value length */
if (pqGetInt(&vlen, 4, conn))
return EOF;
if (vlen == -1)
{
/* if the field value is absent, make it a null string */
/* null field */
tup[i].value = result->null_field;
tup[i].len = NULL_LEN;
continue;
}
else
if (vlen < 0)
vlen = 0;
if (tup[i].value == NULL)
{
/* get the value length (the first four bytes are for length) */
if (pqGetInt(&vlen, 4, conn))
goto EOFexit;
if (binary == 0)
vlen = vlen - 4;
if (vlen < 0)
vlen = 0;
tup[i].value = (char *) pqResultAlloc(result, vlen + 1, false);
if (tup[i].value == NULL)
{
tup[i].value = (char *) pqResultAlloc(result, vlen + 1, (bool) binary);
if (tup[i].value == NULL)
goto outOfMemory;
}
tup[i].len = vlen;
/* read in the value */
if (vlen > 0)
if (pqGetnchar((char *) (tup[i].value), vlen, conn))
goto EOFexit;
/* we have to terminate this ourselves */
tup[i].value[vlen] = '\0';
goto outOfMemory;
}
/* advance the bitmap stuff */
bitcnt++;
if (bitcnt == BYTELEN)
{
bitmap_index++;
bmap = bitmap[bitmap_index];
bitcnt = 0;
}
else
bmap <<= 1;
tup[i].len = vlen;
/* read in the value */
if (vlen > 0)
if (pqGetnchar((char *) (tup[i].value), vlen, conn))
return EOF;
/* we have to terminate this ourselves */
tup[i].value[vlen] = '\0';
}
/* Success! Store the completed tuple in the result */
@ -1364,8 +1095,6 @@ getAnotherTuple(PGconn *conn, int binary)
/* and reset for a new message */
conn->curTuple = NULL;
if (bitmap != std_bitmap)
free(bitmap);
return 0;
outOfMemory:
@ -1380,13 +1109,8 @@ outOfMemory:
libpq_gettext("out of memory\n"));
conn->result = PQmakeEmptyPGresult(conn, PGRES_FATAL_ERROR);
conn->asyncStatus = PGASYNC_READY;
/* Discard the failed message --- good idea? */
conn->inStart = conn->inEnd;
EOFexit:
if (bitmap != std_bitmap)
free(bitmap);
return EOF;
/* Discard the failed message by pretending we read it */
return 0;
}
@ -2129,10 +1853,11 @@ PQfn(PGconn *conn,
return NULL;
}
if (pqPutMsgStart('F', conn) < 0 || /* function call msg */
pqPuts("", conn) < 0 || /* useless string */
pqPutInt(fnid, 4, conn) < 0 || /* function id */
pqPutInt(nargs, 4, conn) < 0) /* # of args */
if (pqPutMsgStart('F', conn) < 0 || /* function call msg */
pqPutInt(fnid, 4, conn) < 0 || /* function id */
pqPutInt(1, 2, conn) < 0 || /* # of format codes */
pqPutInt(1, 2, conn) < 0 || /* format code: BINARY */
pqPutInt(nargs, 2, conn) < 0) /* # of args */
{
handleSendFailure(conn);
return NULL;
@ -2145,10 +1870,12 @@ PQfn(PGconn *conn,
handleSendFailure(conn);
return NULL;
}
if (args[i].len == -1)
continue; /* it's NULL */
if (args[i].isint)
{
if (pqPutInt(args[i].u.integer, 4, conn))
if (pqPutInt(args[i].u.integer, args[i].len, conn))
{
handleSendFailure(conn);
return NULL;
@ -2164,6 +1891,12 @@ PQfn(PGconn *conn,
}
}
if (pqPutInt(1, 2, conn) < 0) /* result format code: BINARY */
{
handleSendFailure(conn);
return NULL;
}
if (pqPutMsgEnd(conn) < 0 ||
pqFlush(conn))
{
@ -2204,7 +1937,7 @@ PQfn(PGconn *conn,
break;
}
if (msgLength > 30000 &&
!(id == 'T' || id == 'D' || id == 'B' || id == 'd' || id == 'V'))
!(id == 'T' || id == 'D' || id == 'd' || id == 'V'))
{
handleSyncLoss(conn, id, msgLength);
break;
@ -2243,16 +1976,13 @@ PQfn(PGconn *conn,
switch (id)
{
case 'V': /* function result */
if (pqGetc(&id, conn))
if (pqGetInt(actual_result_len, 4, conn))
continue;
if (id == 'G')
if (*actual_result_len != -1)
{
/* function returned nonempty value */
if (pqGetInt(actual_result_len, 4, conn))
continue;
if (result_is_int)
{
if (pqGetInt(result_buf, 4, conn))
if (pqGetInt(result_buf, *actual_result_len, conn))
continue;
}
else
@ -2262,24 +1992,9 @@ PQfn(PGconn *conn,
conn))
continue;
}
if (pqGetc(&id, conn)) /* get the last '0' */
continue;
}
if (id == '0')
{
/* correctly finished function result message */
status = PGRES_COMMAND_OK;
}
else
{
/* The backend violates the protocol. */
printfPQExpBuffer(&conn->errorMessage,
libpq_gettext("protocol error: id=0x%x\n"),
id);
saveErrorResult(conn);
conn->inStart += 5 + msgLength;
return prepareAsyncResult(conn);
}
/* correctly finished function result message */
status = PGRES_COMMAND_OK;
break;
case 'E': /* error return */
if (pqGetErrorNotice(conn, true))
@ -2744,6 +2459,18 @@ PQflush(PGconn *conn)
return (pqFlush(conn));
}
/*
* PQfreemem - safely frees memory allocated
*
* Needed mostly by Win32, unless multithreaded DLL (/MD in VC6)
* Used for freeing memory from PQescapeByte()a/PQunescapeBytea()
*/
void PQfreemem(void *ptr)
{
free(ptr);
}
/*
* PQfreeNotify - free's the memory associated with a PGnotify
*
@ -2760,3 +2487,232 @@ PQfreeNotify(PGnotify *notify)
{
PQfreemem(notify);
}
/* ---------------
* Escaping arbitrary strings to get valid SQL strings/identifiers.
*
* Replaces "\\" with "\\\\" and "'" with "''".
* length is the length of the buffer pointed to by
* from. The buffer at to must be at least 2*length + 1 characters
* long. A terminating NUL character is written.
* ---------------
*/
size_t
PQescapeString(char *to, const char *from, size_t length)
{
const char *source = from;
char *target = to;
unsigned int remaining = length;
while (remaining > 0)
{
switch (*source)
{
case '\\':
*target = '\\';
target++;
*target = '\\';
/* target and remaining are updated below. */
break;
case '\'':
*target = '\'';
target++;
*target = '\'';
/* target and remaining are updated below. */
break;
default:
*target = *source;
/* target and remaining are updated below. */
}
source++;
target++;
remaining--;
}
/* Write the terminating NUL character. */
*target = '\0';
return target - to;
}
/*
* PQescapeBytea - converts from binary string to the
* minimal encoding necessary to include the string in an SQL
* INSERT statement with a bytea type column as the target.
*
* The following transformations are applied
* '\0' == ASCII 0 == \\000
* '\'' == ASCII 39 == \'
* '\\' == ASCII 92 == \\\\
* anything >= 0x80 ---> \\ooo (where ooo is an octal expression)
*/
unsigned char *
PQescapeBytea(const unsigned char *bintext, size_t binlen, size_t *bytealen)
{
const unsigned char *vp;
unsigned char *rp;
unsigned char *result;
size_t i;
size_t len;
/*
* empty string has 1 char ('\0')
*/
len = 1;
vp = bintext;
for (i = binlen; i > 0; i--, vp++)
{
if (*vp == 0 || *vp >= 0x80)
len += 5; /* '5' is for '\\ooo' */
else if (*vp == '\'')
len += 2;
else if (*vp == '\\')
len += 4;
else
len++;
}
rp = result = (unsigned char *) malloc(len);
if (rp == NULL)
return NULL;
vp = bintext;
*bytealen = len;
for (i = binlen; i > 0; i--, vp++)
{
if (*vp == 0 || *vp >= 0x80)
{
(void) sprintf(rp, "\\\\%03o", *vp);
rp += 5;
}
else if (*vp == '\'')
{
rp[0] = '\\';
rp[1] = '\'';
rp += 2;
}
else if (*vp == '\\')
{
rp[0] = '\\';
rp[1] = '\\';
rp[2] = '\\';
rp[3] = '\\';
rp += 4;
}
else
*rp++ = *vp;
}
*rp = '\0';
return result;
}
/*
* PQunescapeBytea - converts the null terminated string representation
* of a bytea, strtext, into binary, filling a buffer. It returns a
* pointer to the buffer which is NULL on error, and the size of the
* buffer in retbuflen. The pointer may subsequently be used as an
* argument to the function free(3). It is the reverse of PQescapeBytea.
*
* The following transformations are reversed:
* '\0' == ASCII 0 == \000
* '\'' == ASCII 39 == \'
* '\\' == ASCII 92 == \\
*
* States:
* 0 normal 0->1->2->3->4
* 1 \ 1->5
* 2 \0 1->6
* 3 \00
* 4 \000
* 5 \'
* 6 \\
*/
unsigned char *
PQunescapeBytea(const unsigned char *strtext, size_t *retbuflen)
{
size_t buflen;
unsigned char *buffer,
*bp;
const unsigned char *sp;
unsigned int state = 0;
if (strtext == NULL)
return NULL;
buflen = strlen(strtext); /* will shrink, also we discover if
* strtext */
buffer = (unsigned char *) malloc(buflen); /* isn't NULL terminated */
if (buffer == NULL)
return NULL;
for (bp = buffer, sp = strtext; *sp != '\0'; bp++, sp++)
{
switch (state)
{
case 0:
if (*sp == '\\')
state = 1;
*bp = *sp;
break;
case 1:
if (*sp == '\'') /* state=5 */
{ /* replace \' with 39 */
bp--;
*bp = '\'';
buflen--;
state = 0;
}
else if (*sp == '\\') /* state=6 */
{ /* replace \\ with 92 */
bp--;
*bp = '\\';
buflen--;
state = 0;
}
else
{
if (isdigit(*sp))
state = 2;
else
state = 0;
*bp = *sp;
}
break;
case 2:
if (isdigit(*sp))
state = 3;
else
state = 0;
*bp = *sp;
break;
case 3:
if (isdigit(*sp)) /* state=4 */
{
int v;
bp -= 3;
sscanf(sp - 2, "%03o", &v);
*bp = v;
buflen -= 3;
state = 0;
}
else
{
*bp = *sp;
state = 0;
}
break;
}
}
buffer = realloc(buffer, buflen);
if (buffer == NULL)
return NULL;
*retbuflen = buflen;
return buffer;
}

4
src/interfaces/libpq/libpq-int.h
View File

@ -12,7 +12,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: libpq-int.h,v 1.68 2003/05/06 21:51:42 tgl Exp $
* $Id: libpq-int.h,v 1.69 2003/05/08 18:16:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -56,7 +56,7 @@ typedef int ssize_t; /* ssize_t doesn't exist in VC (atleast
* pqcomm.h describe what the backend knows, not what libpq knows.
*/
#define PG_PROTOCOL_LIBPQ PG_PROTOCOL(3,107) /* XXX temporary value */
#define PG_PROTOCOL_LIBPQ PG_PROTOCOL(3,108) /* XXX temporary value */
/*
* POSTGRES backend dependent Constants.