Examples with SameList com.sap.hadoop.ds.SameList used on opensource projects

Example 1 with SameList

use of com.sap.hadoop.ds.SameList in project SQLWindowing by hbutani.

the class WindowingTableFunction method execute.

@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
public void execute(PartitionIterator<Object> pItr, Partition outP) throws WindowingException {
    ArrayList<List<?>> oColumns = new ArrayList<List<?>>();
    Partition iPart = pItr.getPartition();
    StructObjectInspector inputOI;
    try {
        inputOI = (StructObjectInspector) iPart.getSerDe().getObjectInspector();
    } catch (SerDeException se) {
        throw new WindowingException(se);
    }
    try {
        for (WindowFunctionDef wFn : wFnDefs) {
            boolean processWindow = wFn.getWindow() != null;
            pItr.reset();
            if (!processWindow) {
                GenericUDAFEvaluator fEval = wFn.getEvaluator();
                Object[] args = new Object[wFn.getArgs().size()];
                AggregationBuffer aggBuffer = fEval.getNewAggregationBuffer();
                while (pItr.hasNext()) {
                    Object row = pItr.next();
                    int i = 0;
                    for (ArgDef arg : wFn.getArgs()) {
                        args[i++] = arg.getExprEvaluator().evaluate(row);
                    }
                    fEval.aggregate(aggBuffer, args);
                }
                Object out = fEval.evaluate(aggBuffer);
                WindowFunctionInfo wFnInfo = FunctionRegistry.getWindowFunctionInfo(wFn.getSpec().getName());
                if (!wFnInfo.isPivotResult()) {
                    out = new SameList(iPart.size(), out);
                }
                oColumns.add((List<?>) out);
            } else {
                oColumns.add(executeFnwithWindow(getQueryDef(), wFn, iPart));
            }
        }
        for (int i = 0; i < iPart.size(); i++) {
            ArrayList oRow = new ArrayList();
            Object iRow = iPart.getAt(i);
            for (StructField f : inputOI.getAllStructFieldRefs()) {
                oRow.add(inputOI.getStructFieldData(iRow, f));
            }
            for (int j = 0; j < oColumns.size(); j++) {
                oRow.add(oColumns.get(j).get(i));
            }
            outP.append(oRow);
        }
    } catch (HiveException he) {
        throw new WindowingException(he);
    }
}