protected DatasetGraphTxn build$() { NodeTable nodeTable = buildNodeTable(params.getNodeTableBaseName()); TripleTable tripleTable = buildTripleTable(nodeTable); QuadTable quadTable = buildQuadTable(nodeTable); NodeTable nodeTablePrefixes = buildNodeTable(params.getPrefixTableBaseName()); DatasetPrefixesTDB prefixes = buildPrefixTable(nodeTablePrefixes); TransactionalSystem trans = new TransactionalBase(txnCoord); DatasetGraphTxn dsg = new DatasetGraphTDB(trans, tripleTable, quadTable, prefixes, ReorderLib.fixed(), location, params); QC.setFactory(dsg.getContext(), OpExecutorTDB2.OpExecFactoryTDB); txnCoord.start(); return dsg; }