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Update libpq to make new features of FE/BE protocol available to

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client applications.  Some editorial work on libpq.sgml, too.
This commit is contained in:
Tom Lane 2003-06-21 21:51:35 +00:00
parent b8d601e735
commit efc3a25bb0
11 changed files with 2523 additions and 831 deletions
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1642
doc/src/sgml/libpq.sgml
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File diff suppressed because it is too large Load Diff

18
doc/src/sgml/lobj.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/lobj.sgml,v 1.28 2003/03/13 01:30:28 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/lobj.sgml,v 1.29 2003/06/21 21:51:33 tgl Exp $
-->
<chapter id="largeObjects">
@ -181,7 +181,8 @@ int lo_open(PGconn *conn, Oid lobjId, int mode);
<function>lo_open</function> returns a large object descriptor
for later use in <function>lo_read</function>, <function>lo_write</function>,
<function>lo_lseek</function>, <function>lo_tell</function>, and
<function>lo_close</function>.
<function>lo_close</function>. The descriptor is only valid for
the duration of the current transaction.
</para>
</sect2>
@ -256,6 +257,11 @@ int lo_close(PGconn *conn, int fd);
<function>lo_open</function>. On success, <function>lo_close</function>
returns zero. On error, the return value is negative.
</para>
<para>
Any large object descriptors that remain open at the end of a
transaction will be closed automatically.
</para>
</sect2>
<sect2>
@ -296,6 +302,14 @@ SELECT lo_export(image.raster, '/tmp/motd') FROM image
WHERE name = 'beautiful image';
</programlisting>
</para>
<para>
These functions read and write files in the server's filesystem, using the
permissions of the database's owning user. Therefore, their use is restricted
to superusers. (In contrast, the client-side import and export functions
read and write files in the client's filesystem, using the permissions of
the client program. Their use is not restricted.)
</para>
</sect1>
<sect1 id="lo-examplesect">

29
src/interfaces/libpq/blibpqdll.def
View File

@ -97,6 +97,20 @@ EXPORTS
_pg_utf_mblen @ 93
_PQunescapeBytea @ 94
_PQfreemem @ 95
_PQtransactionStatus @ 96
_PQparameterStatus @ 97
_PQprotocolVersion @ 98
_PQsetErrorVerbosity @ 99
_PQsetNoticeReceiver @ 100
_PQexecParams @ 101
_PQsendQueryParams @ 102
_PQputCopyData @ 103
_PQputCopyEnd @ 104
_PQgetCopyData @ 105
_PQresultErrorField @ 106
_PQftable @ 107
_PQftablecol @ 108
_PQfformat @ 109
; Aliases for MS compatible names
PQconnectdb = _PQconnectdb
@ -194,4 +208,17 @@ EXPORTS
pg_utf_mblen = _pg_utf_mblen
PQunescapeBytea = _PQunescapeBytea
PQfreemem = _PQfreemem
PQtransactionStatus = _PQtransactionStatus
PQparameterStatus = _PQparameterStatus
PQprotocolVersion = _PQprotocolVersion
PQsetErrorVerbosity = _PQsetErrorVerbosity
PQsetNoticeReceiver = _PQsetNoticeReceiver
PQexecParams = _PQexecParams
PQsendQueryParams = _PQsendQueryParams
PQputCopyData = _PQputCopyData
PQputCopyEnd = _PQputCopyEnd
PQgetCopyData = _PQgetCopyData
PQresultErrorField = _PQresultErrorField
PQftable = _PQftable
PQftablecol = _PQftablecol
PQfformat = _PQfformat

106
src/interfaces/libpq/fe-connect.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.249 2003/06/20 04:09:12 tgl Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.250 2003/06/21 21:51:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -176,6 +176,7 @@ static PQconninfoOption *conninfo_parse(const char *conninfo,
PQExpBuffer errorMessage);
static char *conninfo_getval(PQconninfoOption *connOptions,
const char *keyword);
static void defaultNoticeReceiver(void *arg, const PGresult *res);
static void defaultNoticeProcessor(void *arg, const char *message);
static int parseServiceInfo(PQconninfoOption *options,
PQExpBuffer errorMessage);
@ -1804,11 +1805,14 @@ makeEmptyPGconn(void)
/* Zero all pointers and booleans */
MemSet((char *) conn, 0, sizeof(PGconn));
conn->noticeHook = defaultNoticeProcessor;
conn->noticeHooks.noticeRec = defaultNoticeReceiver;
conn->noticeHooks.noticeProc = defaultNoticeProcessor;
conn->status = CONNECTION_BAD;
conn->asyncStatus = PGASYNC_IDLE;
conn->xactStatus = PQTRANS_IDLE;
conn->setenv_state = SETENV_STATE_IDLE;
conn->client_encoding = PG_SQL_ASCII;
conn->verbosity = PQERRORS_DEFAULT;
conn->notifyList = DLNewList();
conn->sock = -1;
#ifdef USE_SSL
@ -1850,7 +1854,6 @@ makeEmptyPGconn(void)
/*
* freePGconn
* - free the PGconn data structure
*
*/
static void
freePGconn(PGconn *conn)
@ -1899,9 +1902,9 @@ freePGconn(PGconn *conn)
}
/*
closePGconn
- properly close a connection to the backend
*/
* closePGconn
* - properly close a connection to the backend
*/
static void
closePGconn(PGconn *conn)
{
@ -2662,6 +2665,41 @@ PQstatus(const PGconn *conn)
return conn->status;
}
PGTransactionStatusType
PQtransactionStatus(const PGconn *conn)
{
if (!conn || conn->status != CONNECTION_OK)
return PQTRANS_UNKNOWN;
if (conn->asyncStatus != PGASYNC_IDLE)
return PQTRANS_ACTIVE;
return conn->xactStatus;
}
const char *
PQparameterStatus(const PGconn *conn, const char *paramName)
{
const pgParameterStatus *pstatus;
if (!conn || !paramName)
return NULL;
for (pstatus = conn->pstatus; pstatus != NULL; pstatus = pstatus->next)
{
if (strcmp(pstatus->name, paramName) == 0)
return pstatus->value;
}
return NULL;
}
int
PQprotocolVersion(const PGconn *conn)
{
if (!conn)
return 0;
if (conn->status == CONNECTION_BAD)
return 0;
return PG_PROTOCOL_MAJOR(conn->pversion);
}
char *
PQerrorMessage(const PGconn *conn)
{
@ -2731,11 +2769,22 @@ PQsetClientEncoding(PGconn *conn, const char *encoding)
return (status);
}
PGVerbosity
PQsetErrorVerbosity(PGconn *conn, PGVerbosity verbosity)
{
PGVerbosity old;
if (!conn)
return PQERRORS_DEFAULT;
old = conn->verbosity;
conn->verbosity = verbosity;
return old;
}
void
PQtrace(PGconn *conn, FILE *debug_port)
{
if (conn == NULL ||
conn->status == CONNECTION_BAD)
if (conn == NULL)
return;
PQuntrace(conn);
conn->Pfdebug = debug_port;
@ -2744,7 +2793,6 @@ PQtrace(PGconn *conn, FILE *debug_port)
void
PQuntrace(PGconn *conn)
{
/* note: better allow untrace even when connection bad */
if (conn == NULL)
return;
if (conn->Pfdebug)
@ -2754,6 +2802,23 @@ PQuntrace(PGconn *conn)
}
}
PQnoticeReceiver
PQsetNoticeReceiver(PGconn *conn, PQnoticeReceiver proc, void *arg)
{
PQnoticeReceiver old;
if (conn == NULL)
return NULL;
old = conn->noticeHooks.noticeRec;
if (proc)
{
conn->noticeHooks.noticeRec = proc;
conn->noticeHooks.noticeRecArg = arg;
}
return old;
}
PQnoticeProcessor
PQsetNoticeProcessor(PGconn *conn, PQnoticeProcessor proc, void *arg)
{
@ -2762,22 +2827,35 @@ PQsetNoticeProcessor(PGconn *conn, PQnoticeProcessor proc, void *arg)
if (conn == NULL)
return NULL;
old = conn->noticeHook;
old = conn->noticeHooks.noticeProc;
if (proc)
{
conn->noticeHook = proc;
conn->noticeArg = arg;
conn->noticeHooks.noticeProc = proc;
conn->noticeHooks.noticeProcArg = arg;
}
return old;
}
/*
* The default notice/error message processor just prints the
* The default notice message receiver just gets the standard notice text
* and sends it to the notice processor. This two-level setup exists
* mostly for backwards compatibility; perhaps we should deprecate use of
* PQsetNoticeProcessor?
*/
static void
defaultNoticeReceiver(void *arg, const PGresult *res)
{
(void) arg; /* not used */
(*res->noticeHooks.noticeProc) (res->noticeHooks.noticeProcArg,
PQresultErrorMessage(res));
}
/*
* The default notice message processor just prints the
* message on stderr. Applications can override this if they
* want the messages to go elsewhere (a window, for example).
* Note that simply discarding notices is probably a bad idea.
*/
static void
defaultNoticeProcessor(void *arg, const char *message)
{

784
src/interfaces/libpq/fe-exec.c
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File diff suppressed because it is too large Load Diff

36
src/interfaces/libpq/fe-misc.c
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@ -23,7 +23,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-misc.c,v 1.96 2003/06/14 17:49:54 momjian Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-misc.c,v 1.97 2003/06/21 21:51:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -197,7 +197,7 @@ pqPutnchar(const char *s, size_t len, PGconn *conn)
}
/*
* pgGetInt
* pqGetInt
* read a 2 or 4 byte integer and convert from network byte order
* to local byte order
*/
@ -226,7 +226,7 @@ pqGetInt(int *result, size_t bytes, PGconn *conn)
break;
default:
snprintf(noticeBuf, sizeof(noticeBuf),
libpq_gettext("integer of size %lu not supported by pqGetInt\n"),
libpq_gettext("integer of size %lu not supported by pqGetInt"),
(unsigned long) bytes);
PGDONOTICE(conn, noticeBuf);
return EOF;
@ -239,7 +239,7 @@ pqGetInt(int *result, size_t bytes, PGconn *conn)
}
/*
* pgPutInt
* pqPutInt
* write an integer of 2 or 4 bytes, converting from host byte order
* to network byte order.
*/
@ -264,7 +264,7 @@ pqPutInt(int value, size_t bytes, PGconn *conn)
break;
default:
snprintf(noticeBuf, sizeof(noticeBuf),
libpq_gettext("integer of size %lu not supported by pqPutInt\n"),
libpq_gettext("integer of size %lu not supported by pqPutInt"),
(unsigned long) bytes);
PGDONOTICE(conn, noticeBuf);
return EOF;
@ -282,7 +282,7 @@ pqPutInt(int value, size_t bytes, PGconn *conn)
*
* Returns 0 on success, EOF if failed to enlarge buffer
*/
static int
int
pqCheckOutBufferSpace(int bytes_needed, PGconn *conn)
{
int newsize = conn->outBufSize;
@ -748,7 +748,7 @@ pqSendSome(PGconn *conn, int len)
if (sent < 0)
{
/*
* Anything except EAGAIN or EWOULDBLOCK is trouble. If it's
* Anything except EAGAIN/EWOULDBLOCK/EINTR is trouble. If it's
* EPIPE or ECONNRESET, assume we've lost the backend
* connection permanently.
*/
@ -804,25 +804,17 @@ pqSendSome(PGconn *conn, int len)
if (len > 0)
{
/* We didn't send it all, wait till we can send more */
/*
* if the socket is in non-blocking mode we may need to abort
* here and return 1 to indicate that data is still pending.
* We didn't send it all, wait till we can send more.
*
* If the connection is in non-blocking mode we don't wait,
* but return 1 to indicate that data is still pending.
*/
#ifdef USE_SSL
/* can't do anything for our SSL users yet */
if (conn->ssl == NULL)
if (pqIsnonblocking(conn))
{
#endif
if (pqIsnonblocking(conn))
{
result = 1;
break;
}
#ifdef USE_SSL
result = 1;
break;
}
#endif
if (pqWait(FALSE, TRUE, conn))
{

194
src/interfaces/libpq/fe-protocol2.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-protocol2.c,v 1.1 2003/06/08 17:43:00 tgl Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-protocol2.c,v 1.2 2003/06/21 21:51:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -38,6 +38,7 @@
static int getRowDescriptions(PGconn *conn);
static int getAnotherTuple(PGconn *conn, bool binary);
static int pqGetErrorNotice2(PGconn *conn, bool isError);
static void checkXactStatus(PGconn *conn, const char *cmdTag);
static int getNotify(PGconn *conn);
@ -312,7 +313,7 @@ pqSetenvPoll(PGconn *conn)
val);
else
{
val = pqGetParameterStatus(conn, "server_encoding");
val = PQparameterStatus(conn, "server_encoding");
if (val && *val)
pqSaveParameterStatus(conn, "client_encoding",
val);
@ -424,7 +425,7 @@ pqParseInput2(PGconn *conn)
else
{
snprintf(noticeWorkspace, sizeof(noticeWorkspace),
libpq_gettext("message type 0x%02x arrived from server while idle\n"),
libpq_gettext("message type 0x%02x arrived from server while idle"),
id);
PGDONOTICE(conn, noticeWorkspace);
/* Discard the unexpected message; good idea?? */
@ -447,6 +448,7 @@ pqParseInput2(PGconn *conn)
PGRES_COMMAND_OK);
strncpy(conn->result->cmdStatus, conn->workBuffer.data,
CMDSTATUS_LEN);
checkXactStatus(conn, conn->workBuffer.data);
conn->asyncStatus = PGASYNC_READY;
break;
case 'E': /* error return */
@ -464,7 +466,7 @@ pqParseInput2(PGconn *conn)
if (id != '\0')
{
snprintf(noticeWorkspace, sizeof(noticeWorkspace),
libpq_gettext("unexpected character %c following empty query response (\"I\" message)\n"),
libpq_gettext("unexpected character %c following empty query response (\"I\" message)"),
id);
PGDONOTICE(conn, noticeWorkspace);
}
@ -521,7 +523,7 @@ pqParseInput2(PGconn *conn)
else
{
snprintf(noticeWorkspace, sizeof(noticeWorkspace),
libpq_gettext("server sent data (\"D\" message) without prior row description (\"T\" message)\n"));
libpq_gettext("server sent data (\"D\" message) without prior row description (\"T\" message)"));
PGDONOTICE(conn, noticeWorkspace);
/* Discard the unexpected message; good idea?? */
conn->inStart = conn->inEnd;
@ -538,7 +540,7 @@ pqParseInput2(PGconn *conn)
else
{
snprintf(noticeWorkspace, sizeof(noticeWorkspace),
libpq_gettext("server sent binary data (\"B\" message) without prior row description (\"T\" message)\n"));
libpq_gettext("server sent binary data (\"B\" message) without prior row description (\"T\" message)"));
PGDONOTICE(conn, noticeWorkspace);
/* Discard the unexpected message; good idea?? */
conn->inStart = conn->inEnd;
@ -628,6 +630,9 @@ getRowDescriptions(PGconn *conn)
result->attDescs[i].name = pqResultStrdup(result,
conn->workBuffer.data);
result->attDescs[i].tableid = 0;
result->attDescs[i].columnid = 0;
result->attDescs[i].format = 0;
result->attDescs[i].typid = typid;
result->attDescs[i].typlen = typlen;
result->attDescs[i].atttypmod = atttypmod;
@ -674,6 +679,15 @@ getAnotherTuple(PGconn *conn, bool binary)
if (conn->curTuple == NULL)
goto outOfMemory;
MemSet((char *) conn->curTuple, 0, nfields * sizeof(PGresAttValue));
/*
* If it's binary, fix the column format indicators. We assume
* the backend will consistently send either B or D, not a mix.
*/
if (binary)
{
for (i = 0; i < nfields; i++)
result->attDescs[i].format = 1;
}
}
tup = conn->curTuple;
@ -778,6 +792,8 @@ pqGetErrorNotice2(PGconn *conn, bool isError)
{
PGresult *res;
PQExpBufferData workBuf;
char *startp;
char *splitp;
/*
* Since the message might be pretty long, we create a temporary
@ -800,19 +816,63 @@ pqGetErrorNotice2(PGconn *conn, bool isError)
res->resultStatus = isError ? PGRES_FATAL_ERROR : PGRES_NONFATAL_ERROR;
res->errMsg = pqResultStrdup(res, workBuf.data);
/*
* Break the message into fields. We can't do very much here, but we
* can split the severity code off, and remove trailing newlines. Also,
* we use the heuristic that the primary message extends only to the
* first newline --- anything after that is detail message. (In some
* cases it'd be better classed as hint, but we can hardly be expected
* to guess that here.)
*/
while (workBuf.len > 0 && workBuf.data[workBuf.len-1] == '\n')
workBuf.data[--workBuf.len] = '\0';
splitp = strstr(workBuf.data, ": ");
if (splitp)
{
/* what comes before the colon is severity */
*splitp = '\0';
pqSaveMessageField(res, 'S', workBuf.data);
startp = splitp + 3;
}
else
{
/* can't find a colon? oh well... */
startp = workBuf.data;
}
splitp = strchr(startp, '\n');
if (splitp)
{
/* what comes before the newline is primary message */
*splitp++ = '\0';
pqSaveMessageField(res, 'M', startp);
/* the rest is detail; strip any leading whitespace */
while (*splitp && isspace((unsigned char) *splitp))
splitp++;
pqSaveMessageField(res, 'D', splitp);
}
else
{
/* single-line message, so all primary */
pqSaveMessageField(res, 'M', startp);
}
/*
* Either save error as current async result, or just emit the notice.
* Also, if it's an error and we were in a transaction block, assume
* the server has now gone to error-in-transaction state.
*/
if (isError)
{
pqClearAsyncResult(conn);
conn->result = res;
resetPQExpBuffer(&conn->errorMessage);
appendPQExpBufferStr(&conn->errorMessage, workBuf.data);
appendPQExpBufferStr(&conn->errorMessage, res->errMsg);
if (conn->xactStatus == PQTRANS_INTRANS)
conn->xactStatus = PQTRANS_INERROR;
}
else
{
PGDONOTICE(conn, workBuf.data);
(*res->noticeHooks.noticeRec) (res->noticeHooks.noticeRecArg, res);
PQclear(res);
}
@ -820,6 +880,37 @@ pqGetErrorNotice2(PGconn *conn, bool isError)
return 0;
}
/*
* checkXactStatus - attempt to track transaction-block status of server
*
* This is called each time we receive a command-complete message. By
* watching for messages from BEGIN/COMMIT/ROLLBACK commands, we can do
* a passable job of tracking the server's xact status. BUT: this does
* not work at all on 7.3 servers with AUTOCOMMIT OFF. (Man, was that
* feature ever a mistake.) Caveat user.
*
* The tags known here are all those used as far back as 7.0; is it worth
* adding those from even-older servers?
*/
static void
checkXactStatus(PGconn *conn, const char *cmdTag)
{
if (strcmp(cmdTag, "BEGIN") == 0)
conn->xactStatus = PQTRANS_INTRANS;
else if (strcmp(cmdTag, "COMMIT") == 0)
conn->xactStatus = PQTRANS_IDLE;
else if (strcmp(cmdTag, "ROLLBACK") == 0)
conn->xactStatus = PQTRANS_IDLE;
else if (strcmp(cmdTag, "START TRANSACTION") == 0) /* 7.3 only */
conn->xactStatus = PQTRANS_INTRANS;
/*
* Normally we get into INERROR state by detecting an Error message.
* However, if we see one of these tags then we know for sure the
* server is in abort state ...
*/
else if (strcmp(cmdTag, "*ABORT STATE*") == 0) /* pre-7.3 only */
conn->xactStatus = PQTRANS_INERROR;
}
/*
* Attempt to read a Notify response message.
@ -832,6 +923,7 @@ static int
getNotify(PGconn *conn)
{
int be_pid;
int nmlen;
PGnotify *newNotify;
if (pqGetInt(&be_pid, 4, conn))
@ -844,12 +936,14 @@ getNotify(PGconn *conn)
* can all be freed at once. We don't use NAMEDATALEN because we
* don't want to tie this interface to a specific server name length.
*/
newNotify = (PGnotify *) malloc(sizeof(PGnotify) +
strlen(conn->workBuffer.data) +1);
nmlen = strlen(conn->workBuffer.data);
newNotify = (PGnotify *) malloc(sizeof(PGnotify) + nmlen + 1);
if (newNotify)
{
newNotify->relname = (char *) newNotify + sizeof(PGnotify);
strcpy(newNotify->relname, conn->workBuffer.data);
/* fake up an empty-string extra field */
newNotify->extra = newNotify->relname + nmlen;
newNotify->be_pid = be_pid;
DLAddTail(conn->notifyList, DLNewElem(newNotify));
}
@ -858,6 +952,84 @@ getNotify(PGconn *conn)
}
/*
* PQgetCopyData - read a row of data from the backend during COPY OUT
*
* If successful, sets *buffer to point to a malloc'd row of data, and
* returns row length (always > 0) as result.
* Returns 0 if no row available yet (only possible if async is true),
* -1 if end of copy (consult PQgetResult), or -2 if error (consult
* PQerrorMessage).
*/
int
pqGetCopyData2(PGconn *conn, char **buffer, int async)
{
bool found;
int msgLength;
for (;;)
{
/*
* Do we have a complete line of data?
*/
conn->inCursor = conn->inStart;
found = false;
while (conn->inCursor < conn->inEnd)
{
char c = conn->inBuffer[conn->inCursor++];
if (c == '\n')
{
found = true;
break;
}
}
if (!found)
goto nodata;
msgLength = conn->inCursor - conn->inStart;
/*
* If it's the end-of-data marker, consume it, exit COPY_OUT mode,
* and let caller read status with PQgetResult().
*/
if (msgLength == 3 &&
strncmp(&conn->inBuffer[conn->inStart], "\\.\n", 3) == 0)
{
conn->inStart = conn->inCursor;
conn->asyncStatus = PGASYNC_BUSY;
return -1;
}
/*
* Pass the line back to the caller.
*/
*buffer = (char *) malloc(msgLength + 1);
if (*buffer == NULL)
{
printfPQExpBuffer(&conn->errorMessage,
libpq_gettext("out of memory\n"));
return -2;
}
memcpy(*buffer, &conn->inBuffer[conn->inStart], msgLength);
(*buffer)[msgLength] = '\0'; /* Add terminating null */
/* Mark message consumed */
conn->inStart = conn->inCursor;
return msgLength;
nodata:
/* Don't block if async read requested */
if (async)
return 0;
/* Need to load more data */
if (pqWait(TRUE, FALSE, conn) ||
pqReadData(conn) < 0)
return -2;
}
}
/*
* PQgetline - gets a newline-terminated string from the backend.
*
@ -1020,7 +1192,7 @@ pqEndcopy2(PGconn *conn)
if (conn->errorMessage.len > 0)
PGDONOTICE(conn, conn->errorMessage.data);
PGDONOTICE(conn, libpq_gettext("lost synchronization with server, resetting connection\n"));
PGDONOTICE(conn, libpq_gettext("lost synchronization with server, resetting connection"));
/*
* Users doing non-blocking connections need to handle the reset

340
src/interfaces/libpq/fe-protocol3.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-protocol3.c,v 1.1 2003/06/08 17:43:00 tgl Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-protocol3.c,v 1.2 2003/06/21 21:51:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -40,6 +40,8 @@ static int getRowDescriptions(PGconn *conn);
static int getAnotherTuple(PGconn *conn, int msgLength);
static int getParameterStatus(PGconn *conn);
static int getNotify(PGconn *conn);
static int getCopyStart(PGconn *conn, ExecStatusType copytype);
static int getReadyForQuery(PGconn *conn);
static int build_startup_packet(const PGconn *conn, char *packet,
const PQEnvironmentOption *options);
@ -171,7 +173,7 @@ pqParseInput3(PGconn *conn)
else
{
snprintf(noticeWorkspace, sizeof(noticeWorkspace),
libpq_gettext("message type 0x%02x arrived from server while idle\n"),
libpq_gettext("message type 0x%02x arrived from server while idle"),
id);
PGDONOTICE(conn, noticeWorkspace);
/* Discard the unexpected message */
@ -201,7 +203,7 @@ pqParseInput3(PGconn *conn)
conn->asyncStatus = PGASYNC_READY;
break;
case 'Z': /* backend is ready for new query */
if (pqGetc(&conn->xact_status, conn))
if (getReadyForQuery(conn))
return;
conn->asyncStatus = PGASYNC_IDLE;
break;
@ -211,6 +213,11 @@ pqParseInput3(PGconn *conn)
PGRES_EMPTY_QUERY);
conn->asyncStatus = PGASYNC_READY;
break;
case '1': /* Parse Complete */
case '2': /* Bind Complete */
case '3': /* Close Complete */
/* Nothing to do for these message types */
break;
case 'S': /* parameter status */
if (getParameterStatus(conn))
return;
@ -276,17 +283,13 @@ pqParseInput3(PGconn *conn)
}
break;
case 'G': /* Start Copy In */
if (pqGetc(&conn->copy_is_binary, conn))
if (getCopyStart(conn, PGRES_COPY_IN))
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))
if (getCopyStart(conn, PGRES_COPY_OUT))
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;
@ -398,6 +401,9 @@ getRowDescriptions(PGconn *conn)
MemSet((char *) result->attDescs, 0, nfields * sizeof(PGresAttDesc));
}
/* result->binary is true only if ALL columns are binary */
result->binary = (nfields > 0) ? 1 : 0;
/* get type info */
for (i = 0; i < nfields; i++)
{
@ -430,10 +436,15 @@ getRowDescriptions(PGconn *conn)
result->attDescs[i].name = pqResultStrdup(result,
conn->workBuffer.data);
result->attDescs[i].tableid = tableid;
result->attDescs[i].columnid = columnid;
result->attDescs[i].format = format;
result->attDescs[i].typid = typid;
result->attDescs[i].typlen = typlen;
result->attDescs[i].atttypmod = atttypmod;
/* XXX todo: save tableid/columnid, format too */
if (format != 1)
result->binary = 0;
}
/* Success! */
@ -503,7 +514,9 @@ getAnotherTuple(PGconn *conn, int msgLength)
vlen = 0;
if (tup[i].value == NULL)
{
tup[i].value = (char *) pqResultAlloc(result, vlen + 1, false);
bool isbinary = (result->attDescs[i].format != 0);
tup[i].value = (char *) pqResultAlloc(result, vlen + 1, isbinary);
if (tup[i].value == NULL)
goto outOfMemory;
}
@ -553,6 +566,7 @@ pqGetErrorNotice3(PGconn *conn, bool isError)
PGresult *res;
PQExpBufferData workBuf;
char id;
const char *val;
/*
* Make a PGresult to hold the accumulated fields. We temporarily
@ -580,68 +594,63 @@ pqGetErrorNotice3(PGconn *conn, bool isError)
break; /* terminator found */
if (pqGets(&workBuf, conn))
goto fail;
switch (id)
{
case 'S':
res->errSeverity = pqResultStrdup(res, workBuf.data);
break;
case 'C':
res->errCode = pqResultStrdup(res, workBuf.data);
break;
case 'M':
res->errPrimary = pqResultStrdup(res, workBuf.data);
break;
case 'D':
res->errDetail = pqResultStrdup(res, workBuf.data);
break;
case 'H':
res->errHint = pqResultStrdup(res, workBuf.data);
break;
case 'P':
res->errPosition = pqResultStrdup(res, workBuf.data);
break;
case 'W':
res->errContext = pqResultStrdup(res, workBuf.data);
break;
case 'F':
res->errFilename = pqResultStrdup(res, workBuf.data);
break;
case 'L':
res->errLineno = pqResultStrdup(res, workBuf.data);
break;
case 'R':
res->errFuncname = pqResultStrdup(res, workBuf.data);
break;
default:
/* silently ignore any other field type */
break;
}
pqSaveMessageField(res, id, workBuf.data);
}
/*
* Now build the "overall" error message for PQresultErrorMessage.
*
* XXX this should be configurable somehow.
*/
resetPQExpBuffer(&workBuf);
if (res->errSeverity)
appendPQExpBuffer(&workBuf, "%s: ", res->errSeverity);
if (res->errPrimary)
appendPQExpBufferStr(&workBuf, res->errPrimary);
/* translator: %s represents a digit string */
if (res->errPosition)
appendPQExpBuffer(&workBuf, libpq_gettext(" at character %s"),
res->errPosition);
val = PQresultErrorField(res, 'S'); /* Severity */
if (val)
appendPQExpBuffer(&workBuf, "%s: ", val);
if (conn->verbosity == PQERRORS_VERBOSE)
{
val = PQresultErrorField(res, 'C'); /* SQLSTATE Code */
if (val)
appendPQExpBuffer(&workBuf, "%s: ", val);
}
val = PQresultErrorField(res, 'M'); /* Primary message */
if (val)
appendPQExpBufferStr(&workBuf, val);
val = PQresultErrorField(res, 'P'); /* Position */
if (val)
{
/* translator: %s represents a digit string */
appendPQExpBuffer(&workBuf, libpq_gettext(" at character %s"), val);
}
appendPQExpBufferChar(&workBuf, '\n');
if (res->errDetail)
appendPQExpBuffer(&workBuf, libpq_gettext("DETAIL: %s\n"),
res->errDetail);
if (res->errHint)
appendPQExpBuffer(&workBuf, libpq_gettext("HINT: %s\n"),
res->errHint);
if (res->errContext)
appendPQExpBuffer(&workBuf, libpq_gettext("CONTEXT: %s\n"),
res->errContext);
if (conn->verbosity != PQERRORS_TERSE)
{
val = PQresultErrorField(res, 'D'); /* Detail */
if (val)
appendPQExpBuffer(&workBuf, libpq_gettext("DETAIL: %s\n"), val);
val = PQresultErrorField(res, 'H'); /* Hint */
if (val)
appendPQExpBuffer(&workBuf, libpq_gettext("HINT: %s\n"), val);
val = PQresultErrorField(res, 'W'); /* Where */
if (val)
appendPQExpBuffer(&workBuf, libpq_gettext("CONTEXT: %s\n"), val);
}
if (conn->verbosity == PQERRORS_VERBOSE)
{
const char *valf;
const char *vall;
valf = PQresultErrorField(res, 'F'); /* File */
vall = PQresultErrorField(res, 'L'); /* Line */
val = PQresultErrorField(res, 'R'); /* Routine */
if (val || valf || vall)
{
appendPQExpBufferStr(&workBuf, libpq_gettext("LOCATION: "));
if (val)
appendPQExpBuffer(&workBuf, libpq_gettext("%s, "), val);
if (valf && vall) /* unlikely we'd have just one */
appendPQExpBuffer(&workBuf, libpq_gettext("%s:%s"),
valf, vall);
appendPQExpBufferChar(&workBuf, '\n');
}
}
/*
* Either save error as current async result, or just emit the notice.
@ -656,7 +665,9 @@ pqGetErrorNotice3(PGconn *conn, bool isError)
}
else
{
PGDONOTICE(conn, workBuf.data);
/* We can cheat a little here and not copy the message. */
res->errMsg = workBuf.data;
(*res->noticeHooks.noticeRec) (res->noticeHooks.noticeRecArg, res);
PQclear(res);
}
@ -710,35 +721,216 @@ static int
getNotify(PGconn *conn)
{
int be_pid;
char *svname;
int nmlen;
int extralen;
PGnotify *newNotify;
if (pqGetInt(&be_pid, 4, conn))
return EOF;
if (pqGets(&conn->workBuffer, conn))
return EOF;
/* must save name while getting extra string */
svname = strdup(conn->workBuffer.data);
if (!svname)
return EOF;
if (pqGets(&conn->workBuffer, conn))
{
free(svname);
return EOF;
}
/*
* Store the relation name right after the PQnotify structure so it
* Store the strings right after the PQnotify structure so it
* can all be freed at once. We don't use NAMEDATALEN because we
* don't want to tie this interface to a specific server name length.
*/
newNotify = (PGnotify *) malloc(sizeof(PGnotify) +
strlen(conn->workBuffer.data) +1);
nmlen = strlen(svname);
extralen = strlen(conn->workBuffer.data);
newNotify = (PGnotify *) malloc(sizeof(PGnotify) + nmlen + extralen + 2);
if (newNotify)
{
newNotify->relname = (char *) newNotify + sizeof(PGnotify);
strcpy(newNotify->relname, conn->workBuffer.data);
strcpy(newNotify->relname, svname);
newNotify->extra = newNotify->relname + nmlen + 1;
strcpy(newNotify->extra, conn->workBuffer.data);
newNotify->be_pid = be_pid;
DLAddTail(conn->notifyList, DLNewElem(newNotify));
}
/* Swallow extra string (not presently used) */
if (pqGets(&conn->workBuffer, conn))
free(svname);
return 0;
}
/*
* getCopyStart - process CopyInResponse or CopyOutResponse message
*
* parseInput already read the message type and length.
*/
static int
getCopyStart(PGconn *conn, ExecStatusType copytype)
{
PGresult *result;
int nfields;
int i;
result = PQmakeEmptyPGresult(conn, copytype);
if (pqGetc(&conn->copy_is_binary, conn))
{
PQclear(result);
return EOF;
}
result->binary = conn->copy_is_binary;
/* the next two bytes are the number of fields */
if (pqGetInt(&(result->numAttributes), 2, conn))
{
PQclear(result);
return EOF;
}
nfields = result->numAttributes;
/* allocate space for the attribute descriptors */
if (nfields > 0)
{
result->attDescs = (PGresAttDesc *)
pqResultAlloc(result, nfields * sizeof(PGresAttDesc), TRUE);
MemSet((char *) result->attDescs, 0, nfields * sizeof(PGresAttDesc));
}
for (i = 0; i < nfields; i++)
{
int format;
if (pqGetInt(&format, 2, conn))
{
PQclear(result);
return EOF;
}
/*
* Since pqGetInt treats 2-byte integers as unsigned, we need to
* coerce these results to signed form.
*/
format = (int) ((int16) format);
result->attDescs[i].format = format;
}
/* Success! */
conn->result = result;
return 0;
}
/*
* getReadyForQuery - process ReadyForQuery message
*/
static int
getReadyForQuery(PGconn *conn)
{
char xact_status;
if (pqGetc(&xact_status, conn))
return EOF;
switch (xact_status)
{
case 'I':
conn->xactStatus = PQTRANS_IDLE;
break;
case 'T':
conn->xactStatus = PQTRANS_INTRANS;
break;
case 'E':
conn->xactStatus = PQTRANS_INERROR;
break;
default:
conn->xactStatus = PQTRANS_UNKNOWN;
break;
}
return 0;
}
/*
* PQgetCopyData - read a row of data from the backend during COPY OUT
*
* If successful, sets *buffer to point to a malloc'd row of data, and
* returns row length (always > 0) as result.
* Returns 0 if no row available yet (only possible if async is true),
* -1 if end of copy (consult PQgetResult), or -2 if error (consult
* PQerrorMessage).
*/
int
pqGetCopyData3(PGconn *conn, char **buffer, int async)
{
char id;
int msgLength;
int avail;
for (;;)
{
/*
* Do we have the next input message? To make life simpler for async
* callers, we keep returning 0 until the next message is fully
* available, even if it is not Copy Data.
*/
conn->inCursor = conn->inStart;
if (pqGetc(&id, conn))
goto nodata;
if (pqGetInt(&msgLength, 4, conn))
goto nodata;
avail = conn->inEnd - conn->inCursor;
if (avail < msgLength - 4)
goto nodata;
/*
* If it's anything except Copy Data, exit COPY_OUT mode and let
* caller read status with PQgetResult(). The normal case is that
* it's Copy Done, but we let parseInput read that.
*/
if (id != 'd')
{
conn->asyncStatus = PGASYNC_BUSY;
return -1;
}
/*
* Drop zero-length messages (shouldn't happen anyway). Otherwise
* pass the data back to the caller.
*/
msgLength -= 4;
if (msgLength > 0)
{
*buffer = (char *) malloc(msgLength + 1);
if (*buffer == NULL)
{
printfPQExpBuffer(&conn->errorMessage,
libpq_gettext("out of memory\n"));
return -2;
}
memcpy(*buffer, &conn->inBuffer[conn->inCursor], msgLength);
(*buffer)[msgLength] = '\0'; /* Add terminating null */
/* Mark message consumed */
conn->inStart = conn->inCursor + msgLength;
return msgLength;
}
/* Empty, so drop it and loop around for another */
conn->inStart = conn->inCursor;
continue;
nodata:
/* Don't block if async read requested */
if (async)
return 0;
/* Need to load more data */
if (pqWait(TRUE, FALSE, conn) ||
pqReadData(conn) < 0)
return -2;
}
}
/*
* PQgetline - gets a newline-terminated string from the backend.
@ -1108,7 +1300,7 @@ pqFunctionCall3(PGconn *conn, Oid fnid,
continue;
break;
case 'Z': /* backend is ready for new query */
if (pqGetc(&conn->xact_status, conn))
if (getReadyForQuery(conn))
continue;
/* consume the message and exit */
conn->inStart += 5 + msgLength;

106
src/interfaces/libpq/libpq-fe.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: libpq-fe.h,v 1.93 2003/06/08 17:43:00 tgl Exp $
* $Id: libpq-fe.h,v 1.94 2003/06/21 21:51:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -88,6 +88,22 @@ typedef enum
PGRES_FATAL_ERROR /* query failed */
} ExecStatusType;
typedef enum
{
PQTRANS_IDLE, /* connection idle */
PQTRANS_ACTIVE, /* command in progress */
PQTRANS_INTRANS, /* idle, within transaction block */
PQTRANS_INERROR, /* idle, within failed transaction */
PQTRANS_UNKNOWN /* cannot determine status */
} PGTransactionStatusType;
typedef enum
{
PQERRORS_TERSE, /* single-line error messages */
PQERRORS_DEFAULT, /* recommended style */
PQERRORS_VERBOSE /* all the facts, ma'am */
} PGVerbosity;
/* PGconn encapsulates a connection to the backend.
* The contents of this struct are not supposed to be known to applications.
*/
@ -108,12 +124,13 @@ typedef struct pg_result PGresult;
*/
typedef struct pgNotify
{
char *relname; /* name of relation containing data */
int be_pid; /* process id of backend */
char *relname; /* notification condition name */
int be_pid; /* process ID of server process */
char *extra; /* notification parameter */
} PGnotify;
/* PQnoticeProcessor is the function type for the notice-message callback.
*/
/* Function types for notice-handling callbacks */
typedef void (*PQnoticeReceiver) (void *arg, const PGresult *res);
typedef void (*PQnoticeProcessor) (void *arg, const char *message);
/* Print options for PQprint() */
@ -227,6 +244,10 @@ extern char *PQport(const PGconn *conn);
extern char *PQtty(const PGconn *conn);
extern char *PQoptions(const PGconn *conn);
extern ConnStatusType PQstatus(const PGconn *conn);
extern PGTransactionStatusType PQtransactionStatus(const PGconn *conn);
extern const char *PQparameterStatus(const PGconn *conn,
const char *paramName);
extern int PQprotocolVersion(const PGconn *conn);
extern char *PQerrorMessage(const PGconn *conn);
extern int PQsocket(const PGconn *conn);
extern int PQbackendPID(const PGconn *conn);
@ -238,42 +259,58 @@ extern int PQsetClientEncoding(PGconn *conn, const char *encoding);
extern SSL *PQgetssl(PGconn *conn);
#endif
/* Set verbosity for PQerrorMessage and PQresultErrorMessage */
extern PGVerbosity PQsetErrorVerbosity(PGconn *conn, PGVerbosity verbosity);
/* Enable/disable tracing */
extern void PQtrace(PGconn *conn, FILE *debug_port);
extern void PQuntrace(PGconn *conn);
/* Override default notice processor */
/* Override default notice handling routines */
extern PQnoticeReceiver PQsetNoticeReceiver(PGconn *conn,
PQnoticeReceiver proc,
void *arg);
extern PQnoticeProcessor PQsetNoticeProcessor(PGconn *conn,
PQnoticeProcessor proc,
void *arg);
/* === in fe-exec.c === */
/* Quoting strings before inclusion in queries. */
extern size_t PQescapeString(char *to, const char *from, size_t length);
extern unsigned char *PQescapeBytea(const unsigned char *bintext, size_t binlen,
size_t *bytealen);
extern unsigned char *PQunescapeBytea(const unsigned char *strtext,
size_t *retbuflen);
extern void PQfreemem(void *ptr);
/* Simple synchronous query */
extern PGresult *PQexec(PGconn *conn, const char *query);
extern PGnotify *PQnotifies(PGconn *conn);
/* Exists for backward compatibility. bjm 2003-03-24 */
#define PQfreeNotify(ptr) PQfreemem(ptr)
extern PGresult *PQexecParams(PGconn *conn,
const char *command,
int nParams,
const Oid *paramTypes,
const char * const *paramValues,
const int *paramLengths,
const int *paramFormats,
int resultFormat);
/* Interface for multiple-result or asynchronous queries */
extern int PQsendQuery(PGconn *conn, const char *query);
extern int PQsendQueryParams(PGconn *conn,
const char *command,
int nParams,
const Oid *paramTypes,
const char * const *paramValues,
const int *paramLengths,
const int *paramFormats,
int resultFormat);
extern PGresult *PQgetResult(PGconn *conn);
/* Routines for managing an asynchronous query */
extern int PQisBusy(PGconn *conn);
extern int PQconsumeInput(PGconn *conn);
/* LISTEN/NOTIFY support */
extern PGnotify *PQnotifies(PGconn *conn);
/* Routines for copy in/out */
extern int PQputCopyData(PGconn *conn, const char *buffer, int nbytes);
extern int PQputCopyEnd(PGconn *conn, const char *errormsg);
extern int PQgetCopyData(PGconn *conn, char **buffer, int async);
/* Deprecated routines for copy in/out */
extern int PQgetline(PGconn *conn, char *string, int length);
extern int PQputline(PGconn *conn, const char *string);
extern int PQgetlineAsync(PGconn *conn, char *buffer, int bufsize);
@ -303,11 +340,15 @@ extern PGresult *PQfn(PGconn *conn,
extern ExecStatusType PQresultStatus(const PGresult *res);
extern char *PQresStatus(ExecStatusType status);
extern char *PQresultErrorMessage(const PGresult *res);
extern char *PQresultErrorField(const PGresult *res, int fieldcode);
extern int PQntuples(const PGresult *res);
extern int PQnfields(const PGresult *res);
extern int PQbinaryTuples(const PGresult *res);
extern char *PQfname(const PGresult *res, int field_num);
extern int PQfnumber(const PGresult *res, const char *field_name);
extern Oid PQftable(const PGresult *res, int field_num);
extern int PQftablecol(const PGresult *res, int field_num);
extern int PQfformat(const PGresult *res, int field_num);
extern Oid PQftype(const PGresult *res, int field_num);
extern int PQfsize(const PGresult *res, int field_num);
extern int PQfmod(const PGresult *res, int field_num);
@ -322,6 +363,12 @@ extern int PQgetisnull(const PGresult *res, int tup_num, int field_num);
/* Delete a PGresult */
extern void PQclear(PGresult *res);
/* For freeing other alloc'd results, such as PGnotify structs */
extern void PQfreemem(void *ptr);
/* Exists for backward compatibility. bjm 2003-03-24 */
#define PQfreeNotify(ptr) PQfreemem(ptr)
/*
* Make an empty PGresult with given status (some apps find this
* useful). If conn is not NULL and status indicates an error, the
@ -329,26 +376,33 @@ extern void PQclear(PGresult *res);
*/
extern PGresult *PQmakeEmptyPGresult(PGconn *conn, ExecStatusType status);
/* Quoting strings before inclusion in queries. */
extern size_t PQescapeString(char *to, const char *from, size_t length);
extern unsigned char *PQescapeBytea(const unsigned char *bintext, size_t binlen,
size_t *bytealen);
extern unsigned char *PQunescapeBytea(const unsigned char *strtext,
size_t *retbuflen);
/* === in fe-print.c === */
extern void
PQprint(FILE *fout, /* output stream */
const PGresult *res,
const PQprintOpt *ps); /* option structure */
extern void PQprint(FILE *fout, /* output stream */
const PGresult *res,
const PQprintOpt *ps); /* option structure */
/*
* really old printing routines
*/
extern void
PQdisplayTuples(const PGresult *res,
extern void PQdisplayTuples(const PGresult *res,
FILE *fp, /* where to send the output */
int fillAlign, /* pad the fields with spaces */
const char *fieldSep, /* field separator */
int printHeader, /* display headers? */
int quiet);
extern void
PQprintTuples(const PGresult *res,
extern void PQprintTuples(const PGresult *res,
FILE *fout, /* output stream */
int printAttName, /* print attribute names */
int terseOutput, /* delimiter bars */

84
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 1.74 2003/06/14 17:49:54 momjian Exp $
* $Id: libpq-int.h,v 1.75 2003/06/21 21:51:34 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,6 +20,9 @@
#ifndef LIBPQ_INT_H
#define LIBPQ_INT_H
/* We assume libpq-fe.h has already been included. */
#include "postgres_fe.h"
#include <time.h>
#include <sys/types.h>
#ifndef WIN32
@ -28,13 +31,10 @@
#if defined(WIN32) && (!defined(ssize_t))
typedef int ssize_t; /* ssize_t doesn't exist in VC (atleast
typedef int ssize_t; /* ssize_t doesn't exist in VC (at least
* not VC6) */
#endif
/* We assume libpq-fe.h has already been included. */
#include "postgres_fe.h"
/* include stuff common to fe and be */
#include "getaddrinfo.h"
#include "libpq/pqcomm.h"
@ -78,7 +78,10 @@ union pgresult_data
typedef struct pgresAttDesc
{
char *name; /* type name */
char *name; /* column name */
Oid tableid; /* source table, if known */
int columnid; /* source column, if known */
int format; /* format code for value (text/binary) */
Oid typid; /* type id */
int typlen; /* type size */
int atttypmod; /* type-specific modifier info */
@ -91,7 +94,7 @@ typedef struct pgresAttDesc
*
* The value pointer always points to a null-terminated area; we add a
* null (zero) byte after whatever the backend sends us. This is only
* particularly useful for text tuples ... with a binary value, the
* particularly useful for text values ... with a binary value, the
* value might have embedded nulls, so the application can't use C string
* operators on it. But we add a null anyway for consistency.
* Note that the value itself does not contain a length word.
@ -111,6 +114,23 @@ typedef struct pgresAttValue
* byte */
} PGresAttValue;
/* Typedef for message-field list entries */
typedef struct pgMessageField
{
struct pgMessageField *next; /* list link */
char code; /* field code */
char contents[1]; /* field value (VARIABLE LENGTH) */
} PGMessageField;
/* Fields needed for notice handling */
typedef struct
{
PQnoticeReceiver noticeRec; /* notice message receiver */
void *noticeRecArg;
PQnoticeProcessor noticeProc; /* notice message processor */
void *noticeProcArg;
} PGNoticeHooks;
struct pg_result
{
int ntups;
@ -118,10 +138,10 @@ struct pg_result
PGresAttDesc *attDescs;
PGresAttValue **tuples; /* each PGresTuple is an array of
* PGresAttValue's */
int tupArrSize; /* size of tuples array allocated */
int tupArrSize; /* allocated size of tuples array */
ExecStatusType resultStatus;
char cmdStatus[CMDSTATUS_LEN]; /* cmd status from the
* last query */
* query */
int binary; /* binary tuple values if binary == 1,
* otherwise text */
@ -129,35 +149,23 @@ struct pg_result
* These fields are copied from the originating PGconn, so that
* operations on the PGresult don't have to reference the PGconn.
*/
PQnoticeProcessor noticeHook; /* notice/error message processor */
void *noticeArg;
PGNoticeHooks noticeHooks;
int client_encoding; /* encoding id */
/*
* Error information (all NULL if not an error result). errMsg is the
* "overall" error message returned by PQresultErrorMessage. If we
* got a field-ized error from the server then the additional fields
* may be set.
* have per-field info then it is stored in a linked list.
*/
char *errMsg; /* error message, or NULL if no error */
char *errSeverity; /* severity code */
char *errCode; /* SQLSTATE code */
char *errPrimary; /* primary message text */
char *errDetail; /* detail text */
char *errHint; /* hint text */
char *errPosition; /* cursor position */
char *errContext; /* location information */
char *errFilename; /* source-code file name */
char *errLineno; /* source-code line number */
char *errFuncname; /* source-code function name */
PGMessageField *errFields; /* message broken into fields */
/* All NULL attributes in the query result point to this null string */
char null_field[1];
/*
* Space management information. Note that attDescs and errMsg, if
* not null, point into allocated blocks. But tuples points to a
* Space management information. Note that attDescs and error stuff,
* if not null, point into allocated blocks. But tuples points to a
* separately malloc'd block, so that we can realloc it.
*/
PGresult_data *curBlock; /* most recently allocated block */
@ -245,18 +253,18 @@ struct pg_conn
/* Optional file to write trace info to */
FILE *Pfdebug;
/* Callback procedure for notice/error message processing */
PQnoticeProcessor noticeHook;
void *noticeArg;
/* Callback procedures for notice message processing */
PGNoticeHooks noticeHooks;
/* Status indicators */
ConnStatusType status;
PGAsyncStatusType asyncStatus;
char xact_status; /* status flag from latest ReadyForQuery */
char copy_is_binary; /* 1 = copy binary, 0 = copy text */
int copy_already_done; /* # bytes already returned in COPY OUT */
PGTransactionStatusType xactStatus;
/* note: xactStatus never changes to ACTIVE */
int nonblocking; /* whether this connection is using a
* blocking socket to the backend or not */
char copy_is_binary; /* 1 = copy binary, 0 = copy text */
int copy_already_done; /* # bytes already returned in COPY OUT */
Dllist *notifyList; /* Notify msgs not yet handed to
* application */
@ -281,6 +289,7 @@ struct pg_conn
char cryptSalt[2]; /* password salt received from backend */
pgParameterStatus *pstatus; /* ParameterStatus data */
int client_encoding; /* encoding id */
PGVerbosity verbosity; /* error/notice message verbosity */
PGlobjfuncs *lobjfuncs; /* private state for large-object access
* fns */
@ -351,10 +360,12 @@ extern char *pqResultStrdup(PGresult *res, const char *str);
extern void pqClearAsyncResult(PGconn *conn);
extern void pqSaveErrorResult(PGconn *conn);
extern PGresult *pqPrepareAsyncResult(PGconn *conn);
extern void pqInternalNotice(const PGNoticeHooks *hooks, const char *msgtext);
extern int pqAddTuple(PGresult *res, PGresAttValue *tup);
extern void pqSaveMessageField(PGresult *res, char code,
const char *value);
extern void pqSaveParameterStatus(PGconn *conn, const char *name,
const char *value);
extern const char *pqGetParameterStatus(PGconn *conn, const char *name);
extern void pqHandleSendFailure(PGconn *conn);
/* === in fe-protocol2.c === */
@ -364,6 +375,7 @@ extern PostgresPollingStatusType pqSetenvPoll(PGconn *conn);
extern char *pqBuildStartupPacket2(PGconn *conn, int *packetlen,
const PQEnvironmentOption *options);
extern void pqParseInput2(PGconn *conn);
extern int pqGetCopyData2(PGconn *conn, char **buffer, int async);
extern int pqGetline2(PGconn *conn, char *s, int maxlen);
extern int pqGetlineAsync2(PGconn *conn, char *buffer, int bufsize);
extern int pqEndcopy2(PGconn *conn);
@ -378,6 +390,7 @@ extern char *pqBuildStartupPacket3(PGconn *conn, int *packetlen,
const PQEnvironmentOption *options);
extern void pqParseInput3(PGconn *conn);
extern int pqGetErrorNotice3(PGconn *conn, bool isError);
extern int pqGetCopyData3(PGconn *conn, char **buffer, int async);
extern int pqGetline3(PGconn *conn, char *s, int maxlen);
extern int pqGetlineAsync3(PGconn *conn, char *buffer, int bufsize);
extern int pqEndcopy3(PGconn *conn);
@ -393,6 +406,7 @@ extern PGresult *pqFunctionCall3(PGconn *conn, Oid fnid,
* for Get, EOF merely means the buffer is exhausted, not that there is
* necessarily any error.
*/
extern int pqCheckOutBufferSpace(int bytes_needed, PGconn *conn);
extern int pqCheckInBufferSpace(int bytes_needed, PGconn *conn);
extern int pqGetc(char *result, PGconn *conn);
extern int pqPutc(char c, PGconn *conn);
@ -423,10 +437,10 @@ extern ssize_t pqsecure_write(PGconn *, const void *ptr, size_t len);
/* Note: PGDONOTICE macro will work if applied to either PGconn or PGresult */
#define PGDONOTICE(conn,message) \
((*(conn)->noticeHook) ((conn)->noticeArg, (message)))
pqInternalNotice(&(conn)->noticeHooks, (message))
/*
* this is so that we can check is a connection is non-blocking internally
* this is so that we can check if a connection is non-blocking internally
* without the overhead of a function call
*/
#define pqIsnonblocking(conn) ((conn)->nonblocking)

15
src/interfaces/libpq/libpqdll.def
View File

@ -97,4 +97,17 @@ EXPORTS
pg_utf_mblen @ 93
PQunescapeBytea @ 94
PQfreemem @ 95
PQtransactionStatus @ 96
PQparameterStatus @ 97
PQprotocolVersion @ 98
PQsetErrorVerbosity @ 99
PQsetNoticeReceiver @ 100
PQexecParams @ 101
PQsendQueryParams @ 102
PQputCopyData @ 103
PQputCopyEnd @ 104
PQgetCopyData @ 105
PQresultErrorField @ 106
PQftable @ 107
PQftablecol @ 108
PQfformat @ 109