import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
public Statistic getStatistic() {
  return new Statistic() {
    public Double getRowCount() {
      return table.rowCount;
    }

    public boolean isKey(ImmutableBitSet columns) {
      return table.isKey(columns);
    }

    public List<RelReferentialConstraint> getReferentialConstraints() {
      return table.getReferentialConstraints();
    }

    public List<RelCollation> getCollations() {
      return table.collationList;
    }

    public RelDistribution getDistribution() {
      return table.getDistribution();
    }
  };
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
  return new StatisticImpl() {
    @Override
    public Double getRowCount() {
      return (double) dataset.getReadDefinition().getScanStats().getRecordCount();
    }
  };
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
  return new StatisticImpl() {
    @Override
    public Double getRowCount() {
      return (double) datasetAccessor.getDataset().getReadDefinition().getScanStats().getRecordCount();
    }
  };
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
private Statistic buildStatistic() {
  if (stats != null || primaryKey == -1) {
    return stats;
  }
  Direction dir = primaryKeyMonotonicity == INCREASING ? ASCENDING : DESCENDING;
  RelFieldCollation collation = new RelFieldCollation(primaryKey, dir, NullDirection.UNSPECIFIED);
  return Statistics.of(fields.size(), ImmutableList.of(ImmutableBitSet.of(primaryKey)),
      ImmutableList.of(RelCollations.of(collation)));
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
    int counter = 0;
    for (IThreadStack threadStack : getThreadStacks()) {
        counter += threadStack.getStackFrames().length;
    }
    return Statistics.of(counter, ImmutableList.of(ImmutableBitSet.of(0, 1)));
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
public Statistic getStatistic() {
  final List<ImmutableBitSet> keys = Lists.newArrayList();
  final Content content = supplier.get();
  for (Ord<Column> ord : Ord.zip(content.columns)) {
    if (ord.e.cardinality == content.size) {
      keys.add(ImmutableBitSet.of(ord.i));
    }
  }
  return Statistics.of(content.size, keys, content.collations);
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
  return Statistics.UNKNOWN;
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
    return Statistics.of(tableManager.getStats().getTablesize(),
        keys);
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
  return Statistics.of(desc.getItemCount(), ImmutableList.of(), ImmutableList.of());
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
/**
 * Not used {@link Statistic} to optimize the plan.
 */
@Override
public Statistic getStatistic() {
  return Statistics.UNKNOWN;
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
  return drillTable.getStatistic();
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
  throw new UnsupportedOperationException(
      "Statistic was not retrieved when this table had been being requested");
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic()
{
  return Statistics.of(100d, ImmutableList.<ImmutableBitSet>of(), RelCollations.createSingleton(0));
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
public TableBuilderInfo statistics(Statistic stats) {
  this.stats = stats;
  return this;
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
public Statistic getStatistic() {
  return Statistics.of(0d, ImmutableList.<ImmutableBitSet>of());
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
    List<ImmutableBitSet> keys = new ArrayList<ImmutableBitSet>();
    return Statistics.of(100, keys);
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
    return Statistics.of(references.size(), unique ? UNIQUE_KEYS_STATISTICS : NON_UNIQUE_KEYS_STATISTICS);
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
    List<ImmutableBitSet> uniqueKeys = ImmutableList.of(ImmutableBitSet.of(0));
    return Statistics.of(classesList.getTotalObjects(), uniqueKeys);
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override
public Statistic getStatistic() {
    return Statistics.of(references.size(), NON_UNIQUE_KEYS_STATISTICS);
}
 

import org.apache.calcite.schema.Statistic; //导入依赖的package包/类
@Override public Statistic getStatistic() {
  Bug.upgrade("add row count estimate to TpcdsTable, and use it");
  Integer rowCount = TABLE_ROW_COUNTS.get(tpcdsTable.name);
  assert rowCount != null : tpcdsTable.name;
  return Statistics.of(rowCount, Collections.<ImmutableBitSet>emptyList());
}