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Code Issues Releases Wiki Activity

Hi, 

Just in case you'd like to see what I was talking about, I am
attaching
my patch to src/interfaces/libpq/fe-exec.c to prevent utility functions
called from SPI from locking up the client.

Jerry Gay
This commit is contained in:
Bruce Momjian 1999-03-14 16:42:15 +00:00
parent 80db587e7b
commit e2c4d41f32
1 changed files with 24 additions and 4 deletions
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28
src/interfaces/libpq/fe-exec.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-exec.c,v 1.74 1999/02/13 23:22:41 momjian Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-exec.c,v 1.75 1999/03/14 16:42:15 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -467,6 +467,7 @@ static void
parseInput(PGconn *conn)
{
char id;
static int pendingT = 0;
/*
* Loop to parse successive complete messages available in the buffer.
@ -535,7 +536,15 @@ parseInput(PGconn *conn)
PGRES_COMMAND_OK);
if (pqGets(conn->result->cmdStatus, CMDSTATUS_LEN, conn))
return;
conn->asyncStatus = PGASYNC_READY;
if (pendingT) {
/* Check the returned message */
/* if it's a SELECT in a pendingT case, */
/* then it probably means no rows returned. */
/* We clear pendingT in that case. */
if (strncmp(conn->result->cmdStatus, "SELECT", 6) == 0)
pendingT = 0;
}
if (!pendingT) conn->asyncStatus = PGASYNC_READY;
break;
case 'E': /* error return */
if (pqGets(conn->errorMessage, ERROR_MSG_LENGTH, conn))
@ -545,10 +554,11 @@ parseInput(PGconn *conn)
/* and build an error result holding the error message */
conn->result = PQmakeEmptyPGresult(conn,
PGRES_FATAL_ERROR);
conn->asyncStatus = PGASYNC_READY;
if (!pendingT) conn->asyncStatus = PGASYNC_READY;
break;
case 'Z': /* backend is ready for new query */
conn->asyncStatus = PGASYNC_IDLE;
pendingT = 0;
break;
case 'I': /* empty query */
/* read and throw away the closing '\0' */
@ -563,7 +573,7 @@ parseInput(PGconn *conn)
if (conn->result == NULL)
conn->result = PQmakeEmptyPGresult(conn,
PGRES_EMPTY_QUERY);
conn->asyncStatus = PGASYNC_READY;
if (!pendingT) conn->asyncStatus = PGASYNC_READY;
break;
case 'K': /* secret key data from the backend */
@ -584,11 +594,15 @@ parseInput(PGconn *conn)
break;
case 'T': /* row descriptions (start of query
* results) */
if (pendingT) {
DONOTICE(conn, "Got second 'T' message!\n");
}
if (conn->result == NULL)
{
/* First 'T' in a query sequence */
if (getRowDescriptions(conn))
return;
pendingT = 1;
}
else
{
@ -600,11 +614,13 @@ parseInput(PGconn *conn)
* We stop parsing until the application accepts
* the current result.
*/
pendingT = 0;
conn->asyncStatus = PGASYNC_READY;
return;
}
break;
case 'D': /* ASCII data tuple */
pendingT = 0;
if (conn->result != NULL)
{
/* Read another tuple of a normal query response */
@ -622,6 +638,7 @@ parseInput(PGconn *conn)
}
break;
case 'B': /* Binary data tuple */
pendingT = 0;
if (conn->result != NULL)
{
/* Read another tuple of a normal query response */
@ -639,12 +656,15 @@ parseInput(PGconn *conn)
}
break;
case 'G': /* Start Copy In */
pendingT = 0;
conn->asyncStatus = PGASYNC_COPY_IN;
break;
case 'H': /* Start Copy Out */
pendingT = 0;
conn->asyncStatus = PGASYNC_COPY_OUT;
break;
default:
pendingT = 0;
sprintf(conn->errorMessage,
"unknown protocol character '%c' read from backend. "
"(The protocol character is the first character the "