| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.hive.metastore; |
| |
| import java.math.BigDecimal; |
| import java.util.Map; |
| |
| public class LinearExtrapolatePartStatus implements IExtrapolatePartStatus { |
| |
| @Override |
| public Object extrapolate(Object[] min, Object[] max, int colStatIndex, |
| Map<String, Integer> indexMap) { |
| int rightBorderInd = indexMap.size() - 1; |
| int minInd = indexMap.get((String) min[1]); |
| int maxInd = indexMap.get((String) max[1]); |
| if (minInd == maxInd) { |
| return min[0]; |
| } |
| //note that recent metastore stores decimal in string. |
| double decimalmin= 0; |
| double decimalmax = 0; |
| if (colStatTypes[colStatIndex] == ColStatType.Decimal) { |
| BigDecimal bdmin = new BigDecimal(min[0].toString()); |
| decimalmin = bdmin.doubleValue(); |
| BigDecimal bdmax = new BigDecimal(max[0].toString()); |
| decimalmax = bdmax.doubleValue(); |
| } |
| if (aggrTypes[colStatIndex] == AggrType.Max) { |
| if (minInd < maxInd) { |
| // right border is the max |
| if (colStatTypes[colStatIndex] == ColStatType.Long) { |
| return (Long) ((Long) min[0] + (((Long) max[0] - (Long) min[0]) |
| * (rightBorderInd - minInd) / (maxInd - minInd))); |
| } else if (colStatTypes[colStatIndex] == ColStatType.Double) { |
| return (Double) ((Double) min[0] + (((Double) max[0] - (Double) min[0]) |
| * (rightBorderInd - minInd) / (maxInd - minInd))); |
| } else { |
| double ret = decimalmin + (decimalmax - decimalmin) |
| * (rightBorderInd - minInd) / (maxInd - minInd); |
| return String.valueOf(ret); |
| } |
| } else { |
| // left border is the max |
| if (colStatTypes[colStatIndex] == ColStatType.Long) { |
| return (Long) ((Long) min[0] + ((Long) max[0] - (Long) min[0]) |
| * minInd / (minInd - maxInd)); |
| } else if (colStatTypes[colStatIndex] == ColStatType.Double) { |
| return (Double) ((Double) min[0] + ((Double) max[0] - (Double) min[0]) |
| * minInd / (minInd - maxInd)); |
| } else { |
| double ret = decimalmin + (decimalmax - decimalmin) * minInd |
| / (minInd - maxInd); |
| return String.valueOf(ret); |
| } |
| } |
| } else { |
| if (minInd < maxInd) { |
| // left border is the min |
| if (colStatTypes[colStatIndex] == ColStatType.Long) { |
| Long ret = (Long) max[0] - ((Long) max[0] - (Long) min[0]) * maxInd |
| / (maxInd - minInd); |
| return ret; |
| } else if (colStatTypes[colStatIndex] == ColStatType.Double) { |
| Double ret = (Double) max[0] - ((Double) max[0] - (Double) min[0]) |
| * maxInd / (maxInd - minInd); |
| return ret; |
| } else { |
| double ret = decimalmax - (decimalmax - decimalmin) * maxInd |
| / (maxInd - minInd); |
| return String.valueOf(ret); |
| } |
| } else { |
| // right border is the min |
| if (colStatTypes[colStatIndex] == ColStatType.Long) { |
| Long ret = (Long) max[0] - ((Long) max[0] - (Long) min[0]) |
| * (rightBorderInd - maxInd) / (minInd - maxInd); |
| return ret; |
| } else if (colStatTypes[colStatIndex] == ColStatType.Double) { |
| Double ret = (Double) max[0] - ((Double) max[0] - (Double) min[0]) |
| * (rightBorderInd - maxInd) / (minInd - maxInd); |
| return ret; |
| } else { |
| double ret = decimalmax - (decimalmax - decimalmin) |
| * (rightBorderInd - maxInd) / (minInd - maxInd); |
| return String.valueOf(ret); |
| } |
| } |
| } |
| } |
| } |