/*
* Helper function that actually kicks off the command on the libpq connection.
*/
static void
dispatchCommand(CdbDispatchResult * dispatchResult,
const char *query_text,
int query_text_len)
{
SegmentDatabaseDescriptor *segdbDesc = dispatchResult->segdbDesc;
TimestampTz beforeSend = 0;
long secs;
int usecs;
if (DEBUG1 >= log_min_messages)
beforeSend = GetCurrentTimestamp();
if (PQisBusy(segdbDesc->conn))
elog(LOG, "Trying to send to busy connection %s: asyncStatus %d",
segdbDesc->whoami,
segdbDesc->conn->asyncStatus);
if (cdbconn_isBadConnection(segdbDesc))
{
char *msg = PQerrorMessage(dispatchResult->segdbDesc->conn);
dispatchResult->stillRunning = false;
ereport(ERROR,
(errcode(ERRCODE_GP_INTERCONNECTION_ERROR),
errmsg("Connection lost before dispatch to segment %s: %s",
dispatchResult->segdbDesc->whoami, msg ? msg : "unknown error")));
}
/*
* Submit the command asynchronously.
*/
if (PQsendGpQuery_shared(dispatchResult->segdbDesc->conn, (char *) query_text, query_text_len) == 0)
{
char *msg = PQerrorMessage(dispatchResult->segdbDesc->conn);
dispatchResult->stillRunning = false;
ereport(ERROR,
(errcode(ERRCODE_GP_INTERCONNECTION_ERROR),
errmsg("Command could not be dispatch to segment %s: %s",
dispatchResult->segdbDesc->whoami, msg ? msg : "unknown error")));
}
if (DEBUG1 >= log_min_messages)
{
TimestampDifference(beforeSend, GetCurrentTimestamp(), &secs, &usecs);
if (secs != 0 || usecs > 1000) /* Time > 1ms? */
elog(LOG, "time for PQsendGpQuery_shared %ld.%06d", secs, usecs);
}
/*
* We'll keep monitoring this QE -- whether or not the command
* was dispatched -- in order to check for a lost connection
* or any other errors that libpq might have in store for us.
*/
dispatchResult->stillRunning = true;
dispatchResult->hasDispatched = true;
ELOG_DISPATCHER_DEBUG("Command dispatched to QE (%s)", dispatchResult->segdbDesc->whoami);
}
/*
* Helper function to thread_DispatchCommand that actually kicks off the
* command on the libpq connection.
*
* NOTE: since this is called via a thread, the same rules apply as to
* thread_DispatchCommand absolutely no elog'ing.
*/
static void
dispatchCommand(CdbDispatchResult * dispatchResult,
const char *query_text, int query_text_len)
{
SegmentDatabaseDescriptor *segdbDesc = dispatchResult->segdbDesc;
PGconn *conn = segdbDesc->conn;
TimestampTz beforeSend = 0;
long secs;
int usecs;
if (DEBUG1 >= log_min_messages)
beforeSend = GetCurrentTimestamp();
/*
* Submit the command asynchronously.
*/
if (PQsendGpQuery_shared(conn, (char *) query_text, query_text_len) == 0)
{
char *msg = PQerrorMessage(segdbDesc->conn);
if (DEBUG3 >= log_min_messages)
write_log("PQsendMPPQuery_shared error %s %s",
segdbDesc->whoami, msg ? msg : "");
/*
* Note the error.
*/
cdbdisp_appendMessage(dispatchResult, LOG,
ERRCODE_GP_INTERCONNECTION_ERROR,
"Command could not be sent to segment db %s; %s",
segdbDesc->whoami, msg ? msg : "");
PQfinish(conn);
segdbDesc->conn = NULL;
dispatchResult->stillRunning = false;
}
if (DEBUG1 >= log_min_messages)
{
TimestampDifference(beforeSend, GetCurrentTimestamp(), &secs, &usecs);
if (secs != 0 || usecs > 1000) /* Time > 1ms? */
write_log("time for PQsendGpQuery_shared %ld.%06d", secs, usecs);
}
dispatchResult->hasDispatched = true;
/*
* We'll keep monitoring this QE -- whether or not the command
* was dispatched -- in order to check for a lost connection
* or any other errors that libpq might have in store for us.
*/
}
