static int extractFrozenQueryPlanAndExecute(char *pcQuery)
{
Assert(pcQuery);
ULONG ulQueryLen = -1;
memcpy(&ulQueryLen, pcQuery, sizeof(ULONG));
pcQuery+=sizeof(ULONG);
Query *pquery = (Query *) readNodeFromBinaryString(pcQuery, ulQueryLen);
pcQuery+=ulQueryLen;
PlannedStmt *pplstmt = pg_plan_query(pquery, NULL);
if (!pplstmt)
{
elog(ERROR, "Problem with planned statement of query tree %s", gpdb::SzNodeToString(pquery));
}
// The following steps are required to be able to execute the query.
DestReceiver *pdest = CreateDestReceiver(DestNone, NULL);
QueryDesc *pqueryDesc = CreateQueryDesc(pplstmt, PStrDup("Internal Query") /*plan->query */,
ActiveSnapshot,
InvalidSnapshot,
pdest,
NULL /*paramLI*/,
false);
// Do not record gpperfmon information about internal queries
pqueryDesc->gpmon_pkt = NULL;
elog(NOTICE, "Executing thawed plan...");
ExecutorStart(pqueryDesc, 0);
ExecutorRun(pqueryDesc, ForwardScanDirection, 0);
ExecutorEnd(pqueryDesc);
int iProcessed = (int) pqueryDesc->es_processed;
FreeQueryDesc(pqueryDesc);
return iProcessed;
}
static int extractFrozenPlanAndExecute(char *pcSerializedPS)
{
Assert(pcSerializedPS);
ULONG ulPlannedStmtLen = -1;
memcpy(&ulPlannedStmtLen, pcSerializedPS, sizeof(ULONG));
pcSerializedPS+=sizeof(ULONG);
PlannedStmt *pplstmt = (PlannedStmt *) readNodeFromBinaryString(pcSerializedPS, ulPlannedStmtLen);
pcSerializedPS+=ulPlannedStmtLen;
//The following steps are required to be able to execute the query.
DestReceiver *pdest = CreateDestReceiver(DestNone, NULL);
QueryDesc *pqueryDesc = CreateQueryDesc(pplstmt, PStrDup("Internal Query") /*plan->query */,
ActiveSnapshot,
InvalidSnapshot,
pdest,
NULL /*paramLI*/,
false);
// Do not record gpperfmon information about internal queries
pqueryDesc->gpmon_pkt = NULL;
elog(NOTICE, "Executing thawed plan...");
ExecutorStart(pqueryDesc, 0);
ExecutorRun(pqueryDesc, ForwardScanDirection, 0);
ExecutorEnd(pqueryDesc);
int iProcessed = (int) pqueryDesc->es_processed;
FreeQueryDesc(pqueryDesc);
return iProcessed;
}
/*
* deserializeNode -
* This is used on the qExecs to deserialize serialized Plan and Query Trees
* received from the dispatcher.
* The returned node is palloc'ed in the current memory context.
*/
Node *
deserializeNode(const char *strNode, int size)
{
char *sNode;
Node *node;
int uncompressed_len;
Assert(strNode != NULL);
START_MEMORY_ACCOUNT(MemoryAccounting_CreateAccount(0, MEMORY_OWNER_TYPE_Deserializer));
{
sNode = uncompress_string(strNode, size, &uncompressed_len);
Assert(sNode != NULL);
node = readNodeFromBinaryString(sNode, uncompressed_len);
pfree(sNode);
}
END_MEMORY_ACCOUNT();
return node;
}
