Function EXE_looper

src/jrd/exe.cpp:1366–1587

const StmtNode* EXE_looper(thread_db* tdbb, Request* request, const StmtNode* node)
{
/**************************************
 *
 *	E X E _ l o o p e r
 *
 **************************************
 *
 * Functional description
 *	Cycle thru request execution tree.  Return next node for
 *	execution on stall or request complete.
 *
 **************************************/
	if (!request->req_transaction)
		ERR_post(Arg::Gds(isc_req_no_trans));

	SET_TDBB(tdbb);
	const auto dbb = tdbb->getDatabase();
	const auto attachment = tdbb->getAttachment();

	if (!node)
		BUGCHECK(147);

	// Save the old pool and request to restore on exit
	StmtNode::ExeState exeState(tdbb, request, request->req_transaction);
	Jrd::ContextPoolHolder context(tdbb, request->req_pool);

	fb_assert(request->req_caller == NULL);
	request->req_caller = exeState.oldRequest;

	tdbb->tdbb_flags &= ~(TDBB_stack_trace_done | TDBB_sys_error);

	// Execute stuff until we drop

	ProfilerManager* profilerManager;
	SINT64 profilerInitialTicks, profilerInitialAccumulatedOverhead, profilerLastTicks, profilerLastAccumulatedOverhead;

	if (attachment->isProfilerActive() && !request->hasInternalStatement())
	{
		profilerManager = attachment->getProfilerManager(tdbb);
		profilerInitialTicks = profilerLastTicks = profilerManager->queryTicks();
		profilerInitialAccumulatedOverhead = profilerLastAccumulatedOverhead =
			profilerManager->getAccumulatedOverhead();
	}
	else
	{
		profilerManager = nullptr;
		profilerInitialTicks = 0;
		profilerLastTicks = 0;
		profilerInitialAccumulatedOverhead = 0;
		profilerLastAccumulatedOverhead = 0;
	}

	const StmtNode* profileNode = nullptr;

	const auto profilerCallAfterPsqlLineColumn = [&] {
		const SINT64 currentProfilerTicks = profilerManager->queryTicks();