use of org.apache.hadoop.hive.metastore.api.DoubleColumnStatsData in project hive by apache.
the class DoubleColumnStatsAggregator method extrapolate.
@Override
public void extrapolate(ColumnStatisticsData extrapolateData, int numParts, int numPartsWithStats, Map<String, Double> adjustedIndexMap, Map<String, ColumnStatisticsData> adjustedStatsMap, double densityAvg) {
int rightBorderInd = numParts;
DoubleColumnStatsDataInspector extrapolateDoubleData = new DoubleColumnStatsDataInspector();
Map<String, DoubleColumnStatsData> extractedAdjustedStatsMap = new HashMap<>();
for (Map.Entry<String, ColumnStatisticsData> entry : adjustedStatsMap.entrySet()) {
extractedAdjustedStatsMap.put(entry.getKey(), entry.getValue().getDoubleStats());
}
List<Map.Entry<String, DoubleColumnStatsData>> list = new LinkedList<>(extractedAdjustedStatsMap.entrySet());
// get the lowValue
Collections.sort(list, new Comparator<Map.Entry<String, DoubleColumnStatsData>>() {
@Override
public int compare(Map.Entry<String, DoubleColumnStatsData> o1, Map.Entry<String, DoubleColumnStatsData> o2) {
return Double.compare(o1.getValue().getLowValue(), o2.getValue().getLowValue());
}
});
double minInd = adjustedIndexMap.get(list.get(0).getKey());
double maxInd = adjustedIndexMap.get(list.get(list.size() - 1).getKey());
double lowValue = 0;
double min = list.get(0).getValue().getLowValue();
double max = list.get(list.size() - 1).getValue().getLowValue();
if (minInd == maxInd) {
lowValue = min;
} else if (minInd < maxInd) {
// left border is the min
lowValue = (max - (max - min) * maxInd / (maxInd - minInd));
} else {
// right border is the min
lowValue = (max - (max - min) * (rightBorderInd - maxInd) / (minInd - maxInd));
}
// get the highValue
Collections.sort(list, new Comparator<Map.Entry<String, DoubleColumnStatsData>>() {
@Override
public int compare(Map.Entry<String, DoubleColumnStatsData> o1, Map.Entry<String, DoubleColumnStatsData> o2) {
return Double.compare(o1.getValue().getHighValue(), o2.getValue().getHighValue());
}
});
minInd = adjustedIndexMap.get(list.get(0).getKey());
maxInd = adjustedIndexMap.get(list.get(list.size() - 1).getKey());
double highValue = 0;
min = list.get(0).getValue().getHighValue();
max = list.get(list.size() - 1).getValue().getHighValue();
if (minInd == maxInd) {
highValue = min;
} else if (minInd < maxInd) {
// right border is the max
highValue = (min + (max - min) * (rightBorderInd - minInd) / (maxInd - minInd));
} else {
// left border is the max
highValue = (min + (max - min) * minInd / (minInd - maxInd));
}
// get the #nulls
long numNulls = 0;
for (Map.Entry<String, DoubleColumnStatsData> entry : extractedAdjustedStatsMap.entrySet()) {
numNulls += entry.getValue().getNumNulls();
}
// we scale up sumNulls based on the number of partitions
numNulls = numNulls * numParts / numPartsWithStats;
// get the ndv
long ndv = 0;
long ndvMin = 0;
long ndvMax = 0;
Collections.sort(list, new Comparator<Map.Entry<String, DoubleColumnStatsData>>() {
@Override
public int compare(Map.Entry<String, DoubleColumnStatsData> o1, Map.Entry<String, DoubleColumnStatsData> o2) {
return Long.compare(o1.getValue().getNumDVs(), o2.getValue().getNumDVs());
}
});
long lowerBound = list.get(list.size() - 1).getValue().getNumDVs();
long higherBound = 0;
for (Map.Entry<String, DoubleColumnStatsData> entry : list) {
higherBound += entry.getValue().getNumDVs();
}
if (useDensityFunctionForNDVEstimation && densityAvg != 0.0) {
ndv = (long) ((highValue - lowValue) / densityAvg);
if (ndv < lowerBound) {
ndv = lowerBound;
} else if (ndv > higherBound) {
ndv = higherBound;
}
} else {
minInd = adjustedIndexMap.get(list.get(0).getKey());
maxInd = adjustedIndexMap.get(list.get(list.size() - 1).getKey());
ndvMin = list.get(0).getValue().getNumDVs();
ndvMax = list.get(list.size() - 1).getValue().getNumDVs();
if (minInd == maxInd) {
ndv = ndvMin;
} else if (minInd < maxInd) {
// right border is the max
ndv = (long) (ndvMin + (ndvMax - ndvMin) * (rightBorderInd - minInd) / (maxInd - minInd));
} else {
// left border is the max
ndv = (long) (ndvMin + (ndvMax - ndvMin) * minInd / (minInd - maxInd));
}
}
extrapolateDoubleData.setLowValue(lowValue);
extrapolateDoubleData.setHighValue(highValue);
extrapolateDoubleData.setNumNulls(numNulls);
extrapolateDoubleData.setNumDVs(ndv);
extrapolateData.setDoubleStats(extrapolateDoubleData);
}
use of org.apache.hadoop.hive.metastore.api.DoubleColumnStatsData in project hive by apache.
the class StatObjectConverter method convertToMTableColumnStatistics.
// JDO
public static MTableColumnStatistics convertToMTableColumnStatistics(MTable table, ColumnStatisticsDesc statsDesc, ColumnStatisticsObj statsObj) throws NoSuchObjectException, MetaException, InvalidObjectException {
if (statsObj == null || statsDesc == null) {
throw new InvalidObjectException("Invalid column stats object");
}
MTableColumnStatistics mColStats = new MTableColumnStatistics();
mColStats.setTable(table);
mColStats.setDbName(statsDesc.getDbName());
mColStats.setTableName(statsDesc.getTableName());
mColStats.setLastAnalyzed(statsDesc.getLastAnalyzed());
mColStats.setColName(statsObj.getColName());
mColStats.setColType(statsObj.getColType());
if (statsObj.getStatsData().isSetBooleanStats()) {
BooleanColumnStatsData boolStats = statsObj.getStatsData().getBooleanStats();
mColStats.setBooleanStats(boolStats.isSetNumTrues() ? boolStats.getNumTrues() : null, boolStats.isSetNumFalses() ? boolStats.getNumFalses() : null, boolStats.isSetNumNulls() ? boolStats.getNumNulls() : null);
} else if (statsObj.getStatsData().isSetLongStats()) {
LongColumnStatsData longStats = statsObj.getStatsData().getLongStats();
mColStats.setLongStats(longStats.isSetNumNulls() ? longStats.getNumNulls() : null, longStats.isSetNumDVs() ? longStats.getNumDVs() : null, longStats.isSetBitVectors() ? longStats.getBitVectors() : null, longStats.isSetLowValue() ? longStats.getLowValue() : null, longStats.isSetHighValue() ? longStats.getHighValue() : null);
} else if (statsObj.getStatsData().isSetDoubleStats()) {
DoubleColumnStatsData doubleStats = statsObj.getStatsData().getDoubleStats();
mColStats.setDoubleStats(doubleStats.isSetNumNulls() ? doubleStats.getNumNulls() : null, doubleStats.isSetNumDVs() ? doubleStats.getNumDVs() : null, doubleStats.isSetBitVectors() ? doubleStats.getBitVectors() : null, doubleStats.isSetLowValue() ? doubleStats.getLowValue() : null, doubleStats.isSetHighValue() ? doubleStats.getHighValue() : null);
} else if (statsObj.getStatsData().isSetDecimalStats()) {
DecimalColumnStatsData decimalStats = statsObj.getStatsData().getDecimalStats();
String low = decimalStats.isSetLowValue() ? createJdoDecimalString(decimalStats.getLowValue()) : null;
String high = decimalStats.isSetHighValue() ? createJdoDecimalString(decimalStats.getHighValue()) : null;
mColStats.setDecimalStats(decimalStats.isSetNumNulls() ? decimalStats.getNumNulls() : null, decimalStats.isSetNumDVs() ? decimalStats.getNumDVs() : null, decimalStats.isSetBitVectors() ? decimalStats.getBitVectors() : null, low, high);
} else if (statsObj.getStatsData().isSetStringStats()) {
StringColumnStatsData stringStats = statsObj.getStatsData().getStringStats();
mColStats.setStringStats(stringStats.isSetNumNulls() ? stringStats.getNumNulls() : null, stringStats.isSetNumDVs() ? stringStats.getNumDVs() : null, stringStats.isSetBitVectors() ? stringStats.getBitVectors() : null, stringStats.isSetMaxColLen() ? stringStats.getMaxColLen() : null, stringStats.isSetAvgColLen() ? stringStats.getAvgColLen() : null);
} else if (statsObj.getStatsData().isSetBinaryStats()) {
BinaryColumnStatsData binaryStats = statsObj.getStatsData().getBinaryStats();
mColStats.setBinaryStats(binaryStats.isSetNumNulls() ? binaryStats.getNumNulls() : null, binaryStats.isSetMaxColLen() ? binaryStats.getMaxColLen() : null, binaryStats.isSetAvgColLen() ? binaryStats.getAvgColLen() : null);
} else if (statsObj.getStatsData().isSetDateStats()) {
DateColumnStatsData dateStats = statsObj.getStatsData().getDateStats();
mColStats.setDateStats(dateStats.isSetNumNulls() ? dateStats.getNumNulls() : null, dateStats.isSetNumDVs() ? dateStats.getNumDVs() : null, dateStats.isSetBitVectors() ? dateStats.getBitVectors() : null, dateStats.isSetLowValue() ? dateStats.getLowValue().getDaysSinceEpoch() : null, dateStats.isSetHighValue() ? dateStats.getHighValue().getDaysSinceEpoch() : null);
}
return mColStats;
}
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