public void execExplain( Session session, String query, LogicalPlan plan, QueryContext queryContext, boolean isGlobal, SubmitQueryResponse.Builder response) throws Exception { String explainStr; boolean isTest = queryContext.getBool(SessionVars.TEST_PLAN_SHAPE_FIX_ENABLED); if (isTest) { ExplainPlanPreprocessorForTest preprocessorForTest = new ExplainPlanPreprocessorForTest(); preprocessorForTest.prepareTest(plan); } if (isGlobal) { GlobalPlanner planner = new GlobalPlanner(context.getConf(), context.getCatalog()); MasterPlan masterPlan = compileMasterPlan(plan, queryContext, planner); if (isTest) { ExplainGlobalPlanPreprocessorForTest globalPlanPreprocessorForTest = new ExplainGlobalPlanPreprocessorForTest(); globalPlanPreprocessorForTest.prepareTest(masterPlan); } explainStr = masterPlan.toString(); } else { explainStr = PlannerUtil.buildExplainString(plan.getRootBlock().getRoot()); } Schema schema = new Schema(); schema.addColumn("explain", TajoDataTypes.Type.TEXT); RowStoreUtil.RowStoreEncoder encoder = RowStoreUtil.createEncoder(schema); SerializedResultSet.Builder serializedResBuilder = SerializedResultSet.newBuilder(); VTuple tuple = new VTuple(1); String[] lines = explainStr.split("\n"); int bytesNum = 0; for (String line : lines) { tuple.put(0, DatumFactory.createText(line)); byte[] encodedData = encoder.toBytes(tuple); bytesNum += encodedData.length; serializedResBuilder.addSerializedTuples(ByteString.copyFrom(encodedData)); } serializedResBuilder.setSchema(schema.getProto()); serializedResBuilder.setBytesNum(bytesNum); QueryInfo queryInfo = context .getQueryJobManager() .createNewSimpleQuery( queryContext, session, query, (LogicalRootNode) plan.getRootBlock().getRoot()); response.setState(OK); response.setQueryId(queryInfo.getQueryId().getProto()); response.setResultType(ResultType.ENCLOSED); response.setResultSet(serializedResBuilder.build()); response.setMaxRowNum(lines.length); }