Examples with EvaluationFunction org.apache.storm.sql.runtime.trident.functions.EvaluationFunction used on opensource projects

Example 1 with EvaluationFunction

use of org.apache.storm.sql.runtime.trident.functions.EvaluationFunction in project storm by apache.

the class TridentProjectRel method tridentPlan.

@Override
public void tridentPlan(TridentPlanCreator planCreator) throws Exception {
    // SingleRel
    RelNode input = getInput();
    StormRelUtils.getStormRelInput(input).tridentPlan(planCreator);
    Stream inputStream = planCreator.pop().toStream();
    String stageName = StormRelUtils.getStageName(this);
    String projectionClassName = StormRelUtils.getClassName(this);
    List<String> outputFieldNames = getRowType().getFieldNames();
    int outputCount = outputFieldNames.size();
    List<RexNode> childExps = getChildExps();
    RelDataType inputRowType = getInput(0).getRowType();
    ExecutableExpression projectionInstance = planCreator.createScalarInstance(childExps, inputRowType, projectionClassName);
    Stream finalStream = inputStream.map(new EvaluationFunction(projectionInstance, outputCount, planCreator.getDataContext()), new Fields(outputFieldNames)).name(stageName);
    planCreator.addStream(finalStream);
}