Class ExtTriggerNode

src/jrd/ExtEngineManager.cpp:456–508

External trigger node.

	// External trigger node.
	class ExtTriggerNode final : public TypedNode<StmtNode, StmtNode::TYPE_EXT_TRIGGER>
	{
	public:
		ExtTriggerNode(MemoryPool& pool, const ExtEngineManager::Trigger* aTrigger)
			: TypedNode<StmtNode, StmtNode::TYPE_EXT_TRIGGER>(pool),
			  trigger(aTrigger)
		{
		}

		string internalPrint(NodePrinter& printer) const
		{
			StmtNode::internalPrint(printer);
			return "ExtTriggerNode";
		}

		void genBlr(DsqlCompilerScratch* /*dsqlScratch*/)
		{
		}

		ExtTriggerNode* pass1(thread_db* /*tdbb*/, CompilerScratch* /*csb*/)
		{
			return this;
		}

		ExtTriggerNode* pass2(thread_db* /*tdbb*/, CompilerScratch* /*csb*/)
		{
			return this;
		}

		const StmtNode* execute(thread_db* tdbb, Request* request, ExeState* /*exeState*/) const
		{
			if (request->req_operation == Request::req_evaluate)
			{
				trigger->execute(tdbb, request, request->req_trigger_action,
					getRpb(request, 0), getRpb(request, 1));

				request->req_operation = Request::req_return;
			}

			return parentStmt;
		}

	private:
		static record_param* getRpb(Request* request, USHORT n)
		{
			return request->req_rpb.getCount() > n && request->req_rpb[n].rpb_number.isValid() ?
				&request->req_rpb[n] : NULL;
		}


	private:
		const ExtEngineManager::Trigger* trigger;
	};
}