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());
}
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());
}