Exemple #1
0
  public void execQueryOnVirtualTable(
      QueryContext queryContext,
      Session session,
      String query,
      LogicalPlan plan,
      SubmitQueryResponse.Builder response)
      throws Exception {
    int maxRow = Integer.MAX_VALUE;
    if (plan.getRootBlock().hasNode(NodeType.LIMIT)) {
      LimitNode limitNode = plan.getRootBlock().getNode(NodeType.LIMIT);
      maxRow = (int) limitNode.getFetchFirstNum();
    }
    QueryInfo queryInfo =
        context
            .getQueryJobManager()
            .createNewSimpleQuery(
                queryContext, session, query, (LogicalRootNode) plan.getRootBlock().getRoot());

    NonForwardQueryResultScanner queryResultScanner =
        new NonForwardQueryResultSystemScanner(
            context, plan, queryInfo.getQueryId(), session.getSessionId(), maxRow);

    queryResultScanner.init();
    session.addNonForwardQueryResultScanner(queryResultScanner);

    response.setState(OK);
    response.setQueryId(queryInfo.getQueryId().getProto());
    response.setResultType(ResultType.ENCLOSED);
    response.setMaxRowNum(maxRow);
    response.setTableDesc(queryResultScanner.getTableDesc().getProto());
  }
Exemple #2
0
  public void execSimpleQuery(
      QueryContext queryContext,
      Session session,
      String query,
      LogicalPlan plan,
      SubmitQueryResponse.Builder response)
      throws Exception {
    ScanNode scanNode = plan.getRootBlock().getNode(NodeType.SCAN);
    TableDesc desc = scanNode.getTableDesc();

    if (desc.hasPartition()) {
      scanNode = plan.getRootBlock().getNode(NodeType.PARTITIONS_SCAN);
    }

    int maxRow = Integer.MAX_VALUE;
    if (plan.getRootBlock().hasNode(NodeType.LIMIT)) {
      LimitNode limitNode = plan.getRootBlock().getNode(NodeType.LIMIT);
      maxRow = (int) limitNode.getFetchFirstNum();
    }
    if (desc.getStats().getNumRows() == 0) {
      desc.getStats().setNumRows(TajoConstants.UNKNOWN_ROW_NUMBER);
    }

    QueryInfo queryInfo =
        context
            .getQueryJobManager()
            .createNewSimpleQuery(
                queryContext, session, query, (LogicalRootNode) plan.getRootBlock().getRoot());

    NonForwardQueryResultScanner queryResultScanner =
        new NonForwardQueryResultFileScanner(
            context.getConf(),
            session.getSessionId(),
            queryInfo.getQueryId(),
            scanNode,
            desc,
            maxRow);

    queryResultScanner.init();
    session.addNonForwardQueryResultScanner(queryResultScanner);

    response.setState(OK);
    response.setQueryId(queryInfo.getQueryId().getProto());
    response.setResultType(ResultType.ENCLOSED);
    response.setMaxRowNum(maxRow);
    response.setTableDesc(desc.getProto());
  }