Examples with IsUnknownDescriptor org.apache.asterix.runtime.evaluators.functions.IsUnknownDescriptor used on opensource projects

Example 1 with IsUnknownDescriptor

use of org.apache.asterix.runtime.evaluators.functions.IsUnknownDescriptor in project asterixdb by apache.

the class SecondaryIndexOperationsHelper method createFilterNullsSelectOp.

public AlgebricksMetaOperatorDescriptor createFilterNullsSelectOp(JobSpecification spec, int numSecondaryKeyFields, RecordDescriptor secondaryRecDesc) throws AlgebricksException {
    IScalarEvaluatorFactory[] andArgsEvalFactories = new IScalarEvaluatorFactory[numSecondaryKeyFields];
    NotDescriptor notDesc = new NotDescriptor();
    IsUnknownDescriptor isUnknownDesc = new IsUnknownDescriptor();
    for (int i = 0; i < numSecondaryKeyFields; i++) {
        // Access column i, and apply 'is not null'.
        ColumnAccessEvalFactory columnAccessEvalFactory = new ColumnAccessEvalFactory(i);
        IScalarEvaluatorFactory isUnknownEvalFactory = isUnknownDesc.createEvaluatorFactory(new IScalarEvaluatorFactory[] { columnAccessEvalFactory });
        IScalarEvaluatorFactory notEvalFactory = notDesc.createEvaluatorFactory(new IScalarEvaluatorFactory[] { isUnknownEvalFactory });
        andArgsEvalFactories[i] = notEvalFactory;
    }
    IScalarEvaluatorFactory selectCond;
    if (numSecondaryKeyFields > 1) {
        // Create conjunctive condition where all secondary index keys must
        // satisfy 'is not null'.
        AndDescriptor andDesc = new AndDescriptor();
        selectCond = andDesc.createEvaluatorFactory(andArgsEvalFactories);
    } else {
        selectCond = andArgsEvalFactories[0];
    }
    StreamSelectRuntimeFactory select = new StreamSelectRuntimeFactory(selectCond, null, BinaryBooleanInspector.FACTORY, false, -1, null);
    AlgebricksMetaOperatorDescriptor asterixSelectOp = new AlgebricksMetaOperatorDescriptor(spec, 1, 1, new IPushRuntimeFactory[] { select }, new RecordDescriptor[] { secondaryRecDesc });
    AlgebricksPartitionConstraintHelper.setPartitionConstraintInJobSpec(spec, asterixSelectOp, primaryPartitionConstraint);
    return asterixSelectOp;
}