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package com.salesforce.phoenix.expression.function;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import com.salesforce.phoenix.expression.Expression;
import com.salesforce.phoenix.expression.aggregator.Aggregator;
import com.salesforce.phoenix.expression.aggregator.DistinctValueWithCountClientAggregator;
import com.salesforce.phoenix.expression.aggregator.DistinctValueWithCountServerAggregator;
public abstract class DistinctValueWithCountAggregateFunction extends SingleAggregateFunction {
public DistinctValueWithCountAggregateFunction() {
}
public DistinctValueWithCountAggregateFunction(List<Expression> children) {
super(children);
}
@Override
abstract public DistinctValueWithCountClientAggregator newClientAggregator();
@Override
public Aggregator newServerAggregator(Configuration config, ImmutableBytesWritable ptr) {
DistinctValueWithCountClientAggregator clientAgg = newClientAggregator();
clientAgg.aggregate(null, ptr);
return new DistinctValueWithCountServerAggregator(config, clientAgg);
}
}