@Override
public Void visitRunningAggregateOperator(
RunningAggregateOperator op, Pair<LogicalVariable, LogicalVariable> pair)
throws AlgebricksException {
List<LogicalVariable> variables = op.getVariables();
int n = variables.size();
for (int i = 0; i < n; i++) {
if (variables.get(i).equals(pair.first)) {
variables.set(i, pair.second);
} else {
op.getExpressions().get(i).getValue().substituteVar(pair.first, pair.second);
}
}
substVarTypes(op, pair);
return null;
}
@Override
public void contributeRuntimeOperator(
IHyracksJobBuilder builder,
JobGenContext context,
ILogicalOperator op,
IOperatorSchema opSchema,
IOperatorSchema[] inputSchemas,
IOperatorSchema outerPlanSchema)
throws AlgebricksException {
RunningAggregateOperator ragg = (RunningAggregateOperator) op;
List<LogicalVariable> variables = ragg.getVariables();
List<Mutable<ILogicalExpression>> expressions = ragg.getExpressions();
int[] outColumns = new int[variables.size()];
for (int i = 0; i < outColumns.length; i++) {
outColumns[i] = opSchema.findVariable(variables.get(i));
}
IRunningAggregateEvaluatorFactory[] runningAggFuns =
new IRunningAggregateEvaluatorFactory[expressions.size()];
IExpressionRuntimeProvider expressionRuntimeProvider = context.getExpressionRuntimeProvider();
for (int i = 0; i < runningAggFuns.length; i++) {
StatefulFunctionCallExpression expr =
(StatefulFunctionCallExpression) expressions.get(i).getValue();
runningAggFuns[i] =
expressionRuntimeProvider.createRunningAggregateFunctionFactory(
expr,
context.getTypeEnvironment(op.getInputs().get(0).getValue()),
inputSchemas,
context);
}
// TODO push projections into the operator
int[] projectionList = JobGenHelper.projectAllVariables(opSchema);
RunningAggregateRuntimeFactory runtime =
new RunningAggregateRuntimeFactory(outColumns, runningAggFuns, projectionList);
// contribute one Asterix framewriter
RecordDescriptor recDesc =
JobGenHelper.mkRecordDescriptor(context.getTypeEnvironment(op), opSchema, context);
builder.contributeMicroOperator(ragg, runtime, recDesc);
// and contribute one edge from its child
ILogicalOperator src = ragg.getInputs().get(0).getValue();
builder.contributeGraphEdge(src, 0, ragg, 0);
}