/// <summary>
/// Get step doc index.
/// </summary>
/// <param name="position">first byte of the index (include step doc index)</param>
/// <param name="length">index buffer length</param>
/// <param name="count">count of the document records in this index</param>
/// <param name="indexPostion">first byte of the index (exclude step doc index)<</param>
/// <returns>step doc index. If no step doc index, return null</returns>
public List <DocumentPosition> GetStepDocIndex(long position, long length,
out int count, out long indexPostion)
{
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport();
List <DocumentPosition> result;
//indexPostion = position;
_IndexFile.Seek(position, System.IO.SeekOrigin.Begin);
result = DocumentPositionList.DeserializeSkipDocIndex(_IndexFile, false, out count);
if (result != null)
{
count = DocumentPositionList.GetDocumentsCount(_IndexFile);
}
indexPostion = _IndexFile.Position; //The index position exclude count;
performanceReport.Stop(string.Format("Read index file: len={0}, {1} results. ", _IndexFile.Position - position,
count));
return(result);
}
public Core.SFQL.Parse.DocumentResultWhereDictionary Search()
{
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport("Search of Match1");
Core.SFQL.Parse.DocumentResultWhereDictionary result = new Core.SFQL.Parse.DocumentResultWhereDictionary();
if (_QueryWords.Count <= 0 || _WordIndexes.Length <= 0)
{
if (_QueryParameter.Not && UpDict != null)
{
return(UpDict);
}
else
{
return(result);
}
}
if (this._QueryParameter.Not)
{
if (_InvertedIndex.IndexMode == Field.IndexMode.Simple)
{
Calculate(null, ref result, _WordIndexes);
}
else
{
CalculateWithPosition(null, ref result, _WordIndexes);
}
}
else
{
if (_InvertedIndex.IndexMode == Field.IndexMode.Simple)
{
Calculate(this.UpDict, ref result, _WordIndexes);
}
else
{
CalculateWithPosition(this.UpDict, ref result, _WordIndexes);
}
}
if (this._QueryParameter.Not)
{
result.Not = true;
if (UpDict != null)
{
result = result.AndMergeForNot(result, UpDict);
}
}
performanceReport.Stop();
return(result);
}
public Core.SFQL.Parse.DocumentResultWhereDictionary Search()
{
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport("Search of Contains");
List <WordIndexForQuery[]> partList = GetAllPartOfWordIndexes();
if (_QueryWords.Count <= 0 || partList.Count <= 0)
{
return(PartSearch(new WordIndexForQuery[0]));
}
Core.SFQL.Parse.DocumentResultWhereDictionary result = PartSearch(partList[0]);
for (int i = 1; i < partList.Count; i++)
{
bool someWordNoResult = false;
foreach (WordIndexForQuery w in partList[i])
{
if (w.WordIndex.WordCount == 0)
{
someWordNoResult = true;
break;
}
w.WordIndex.Reset();
}
if (!someWordNoResult)
{
result.OrMerge(result, PartSearch(partList[i]));
}
}
if (this._QueryParameter.Not)
{
result.Not = true;
if (UpDict != null)
{
result = result.AndMergeForNot(result, UpDict);
}
}
performanceReport.Stop();
return(result);
}
/// <summary>
/// Get the specify document position list from .idx file
/// </summary>
/// <param name="position">the position of the first byte of the index</param>
/// <param name="length">index content length</param>
/// <param name="count">max count of the documents that want read</param>
/// <param name="simple">is it simple index mode</param>
/// <returns>Word position list</returns>
public WordDocumentsList GetDocList(long position, long length, int count, bool simple)
{
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport();
_IndexFile.Seek(position, System.IO.SeekOrigin.Begin);
WordDocumentsList result = new WordDocumentsList();
if (count >= 0)
{
result.AddRange(Entity.DocumentPositionList.Deserialize(_IndexFile, ref count, simple, out result.WordCountSum));
result.RelDocCount = count;
}
else
{
result.AddRange(Entity.DocumentPositionList.Deserialize(_IndexFile, simple, out result.WordCountSum));
result.RelDocCount = result.Count;
}
performanceReport.Stop(string.Format("Read index file: len={0}, {1} results. ", _IndexFile.Position - position,
result.Count));
return(result);
}
unsafe private void Calculate(DocumentResultWhereDictionary upDict,
ref DocumentResultWhereDictionary docIdRank, WordIndexForQuery[] wordIndexes)
{
Array.Sort(wordIndexes);
MinResultCount = _DBProvider.Table.GroupByLimit;
//Get max word doc list count
int minWordDocListCount = 1 * 1024 * 1024; //1M
foreach (WordIndexForQuery wifq in wordIndexes)
{
minWordDocListCount = Math.Min(minWordDocListCount, wifq.WordIndex.WordDocList.Count);
}
if (docIdRank.Count == 0)
{
if (minWordDocListCount > DocumentResultWhereDictionary.DefaultSize)
{
docIdRank = new Core.SFQL.Parse.DocumentResultWhereDictionary(minWordDocListCount);
}
}
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport("Calculate");
//Merge
bool oneWordOptimize = this._QueryParameter.CanLoadPartOfDocs && this._QueryParameter.NoAndExpression && wordIndexes.Length == 1;
int oneWordMaxCount = 0;
if (oneWordOptimize)
{
//One word
WordIndexForQuery wifq = wordIndexes[0]; //first word
//Entity.DocumentPositionList[] wifqDocBuf = wifq.WordIndex.DocPositionBuf;
Entity.DocumentPositionList docList = wifq.WordIndex.GetNext();
int j = 0;
while (docList.DocumentId >= 0)
{
//Entity.DocumentPositionList docList = wifq.WordIndex[j];
Core.SFQL.Parse.DocumentResultPoint drp;
drp.pDocumentResult = null;
if (j > MinResultCount)
{
if (oneWordMaxCount > docList.Count)
{
j++;
docList = wifq.WordIndex.GetNext();
continue;
}
}
else
{
if (oneWordMaxCount < docList.Count)
{
oneWordMaxCount = docList.Count;
}
}
long score = (long)wifq.FieldRank * (long)wifq.WordRank * (long)wifq.Idf_t * (long)docList.Count * (long)1000000 / ((long)wifq.Sum_d_t * (long)docList.TotalWordsInThisDocument);
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
if (upDict == null)
{
docIdRank.Add(docList.DocumentId, score);
}
else
{
if (!upDict.Not)
{
if (upDict.ContainsKey(docList.DocumentId))
{
docIdRank.Add(docList.DocumentId, score);
}
}
else
{
if (!upDict.ContainsKey(docList.DocumentId))
{
docIdRank.Add(docList.DocumentId, score);
}
}
}
j++;
docList = wifq.WordIndex.GetNext();
}
}
else
{
int wordIndexesLen = wordIndexes.Length;
WordIndexForQuery fstWifq = wordIndexes[0]; //first word
Entity.DocumentPositionList fstDocList = fstWifq.WordIndex.GetNext();
Entity.DocumentPositionList[] docListArr = new Hubble.Core.Entity.DocumentPositionList[wordIndexesLen];
docListArr[0] = fstDocList;
while (fstDocList.DocumentId >= 0)
{
int curWord = 1;
int firstDocId = fstDocList.DocumentId;
while (curWord < wordIndexesLen)
{
docListArr[curWord] = wordIndexes[curWord].WordIndex.Get(firstDocId);
if (docListArr[curWord].DocumentId < 0)
{
break;
}
curWord++;
} //While
if (curWord >= wordIndexesLen)
{
//Matched
long totalScore = 0;
for (int i = 0; i < wordIndexesLen; i++)
{
WordIndexForQuery wifq = wordIndexes[i];
Entity.DocumentPositionList docList = docListArr[i];
long score = (long)wifq.FieldRank * (long)wifq.WordRank * (long)wifq.Idf_t * (long)docList.Count * (long)1000000 / ((long)wifq.Sum_d_t * (long)docList.TotalWordsInThisDocument);
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
totalScore += score;
}
if (upDict == null)
{
docIdRank.Add(firstDocId, totalScore);
}
else
{
if (!upDict.Not)
{
if (upDict.ContainsKey(firstDocId))
{
docIdRank.Add(firstDocId, totalScore);
}
}
else
{
if (!upDict.ContainsKey(firstDocId))
{
docIdRank.Add(firstDocId, totalScore);
}
}
}
}
fstDocList = fstWifq.WordIndex.GetNext();
docListArr[0] = fstDocList;
}
}
//Merge score if upDict != null
if (upDict != null)
{
if (!upDict.Not)
{
foreach (int docid in docIdRank.Keys)
{
DocumentResult *upDrp;
if (upDict.TryGetValue(docid, out upDrp))
{
DocumentResult *drpResult;
if (docIdRank.TryGetValue(docid, out drpResult))
{
drpResult->Score += upDrp->Score;
}
}
}
}
}
DeleteProvider delProvider = _DBProvider.DelProvider;
int delCount = delProvider.Filter(docIdRank);
if (oneWordOptimize && _QueryParameter.CanLoadPartOfDocs && upDict == null)
{
docIdRank.RelTotalCount = wordIndexes[0].RelTotalCount - delCount;
}
else
{
docIdRank.RelTotalCount = docIdRank.Count;
}
performanceReport.Stop();
}
public Core.SFQL.Parse.DocumentResultWhereDictionary Search()
{
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport("Search of Like");
Core.SFQL.Parse.DocumentResultWhereDictionary result;
if (_QueryThroughDB)
{
string orderBy = _QueryParameter.OrderBy;
if (orderBy != null)
{
if (orderBy.ToLower().Contains("score"))
{
orderBy = null;
}
else if (_DBProvider.Table.IndexOnly && _DBProvider.Table.DocIdReplaceField != null &&
orderBy.ToLower().Contains("docid"))
{
orderBy = null;
}
}
if (!_QueryParameter.NoAndExpression || UpDict != null)
{
if (_DBProvider.Table.IndexOnly && _DBProvider.Table.DocIdReplaceField != null)
{
orderBy = _DBProvider.Table.DocIdReplaceField;
}
else
{
orderBy = "docid";
}
_QueryParameter.End = -1;
}
result = _DBProvider.DBAdapter.GetDocumentResults(_QueryParameter.End,
string.Format("{0} like '{1}'", _FieldName, _LikeString), orderBy);
if (UpDict != null)
{
if (!UpDict.Not)
{
result = result.AndMergeDict(result, UpDict);
}
}
}
else
{
List <WordIndexForQuery[]> partList = GetAllPartOfWordIndexes();
if (_QueryWords.Count <= 0 || partList.Count <= 0)
{
return(PartSearch(new WordIndexForQuery[0]));
}
result = PartSearch(partList[0]);
for (int i = 1; i < partList.Count; i++)
{
bool someWordNoResult = false;
foreach (WordIndexForQuery w in partList[i])
{
if (w.WordIndex.WordCount == 0)
{
someWordNoResult = true;
break;
}
w.WordIndex.Reset();
}
if (!someWordNoResult)
{
result.OrMerge(result, PartSearch(partList[i]));
}
}
}
if (this._QueryParameter.Not)
{
result.Not = true;
if (UpDict != null)
{
result = result.AndMergeForNot(result, UpDict);
}
}
if (!_QueryThroughDB)
{
result = GetExternLikeDocResults(result);
}
performanceReport.Stop();
return(result);
}
unsafe private void CalculateWithPosition(Core.SFQL.Parse.DocumentResultWhereDictionary upDict,
ref Core.SFQL.Parse.DocumentResultWhereDictionary docIdRank, WordIndexForQuery[] wordIndexes)
{
if (UseMatch(wordIndexes))
{
CalculateWithPositionMatch(upDict, ref docIdRank, wordIndexes);
return;
}
Array.Sort(wordIndexes);
AdjustSort(wordIndexes);
MinResultCount = _DBProvider.Table.GroupByLimit;
//Get max word doc list count
int minWordDocListCount = 1 * 1024 * 1024; //1M
foreach (WordIndexForQuery wifq in wordIndexes)
{
minWordDocListCount = Math.Min(minWordDocListCount, wifq.WordIndex.Count);
}
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport("Calculate");
//Merge
bool oneWordOptimize = this._QueryParameter.CanLoadPartOfDocs && this._QueryParameter.AndExpressionCanBeOptimized(_DBProvider) &&
wordIndexes.Length == 1 && _NotInDict == null && _QueryParameter.End >= 0 && !_QueryParameter.NeedDistinct;
if (oneWordOptimize)
{
IQueryOptimize qOptimize = QueryOptimizeBuilder.Build(typeof(OneWordOptimize),
DBProvider, _QueryParameter.End, _QueryParameter.OrderBy,
_QueryParameter.OrderBys, _QueryParameter.NeedGroupBy,
_QueryParameter.OrderByCanBeOptimized, _QueryParameter.NeedFilterUntokenizedConditions(this._DBProvider),
_QueryParameter.UntokenizedTreeOnRoot, wordIndexes);
try
{
qOptimize.CalculateOptimize(upDict, ref docIdRank);
return;
}
finally
{
performanceReport.Stop();
}
}
if (this._QueryParameter.CanLoadPartOfDocs && this._QueryParameter.AndExpressionCanBeOptimized(_DBProvider) &&
_NotInDict == null && _QueryParameter.End >= 0 && !_QueryParameter.NeedDistinct)
{
IQueryOptimize qOptimize = QueryOptimizeBuilder.Build(typeof(ContainsOptimize),
DBProvider, _QueryParameter.End, _QueryParameter.OrderBy,
_QueryParameter.OrderBys, _QueryParameter.NeedGroupBy,
_QueryParameter.OrderByCanBeOptimized, _QueryParameter.NeedFilterUntokenizedConditions(this._DBProvider),
_QueryParameter.UntokenizedTreeOnRoot, wordIndexes);
try
{
qOptimize.CalculateOptimize(upDict, ref docIdRank);
return;
}
finally
{
performanceReport.Stop();
}
//if (qOptimize.Argument.IsOrderByScoreDesc())
//{
//}
}
if (docIdRank.Count == 0)
{
if (minWordDocListCount > DocumentResultWhereDictionary.DefaultSize)
{
docIdRank = new Core.SFQL.Parse.DocumentResultWhereDictionary(minWordDocListCount);
}
}
{
double ratio = 1;
if (wordIndexes.Length > 1)
{
ratio = (double)2 / (double)(wordIndexes.Length - 1);
}
int wordIndexesLen = wordIndexes.Length;
WordIndexForQuery fstWifq = wordIndexes[0]; //first word
OriginalDocumentPositionList fstODPL = new OriginalDocumentPositionList();
fstWifq.WordIndex.GetNextOriginal(ref fstODPL);
//Entity.DocumentPositionList fstDocList = fstWifq.WordIndex.GetNext();
Entity.DocumentPositionList[] docListArr = new Hubble.Core.Entity.DocumentPositionList[wordIndexesLen];
//docListArr[0] = fstDocList;
fstODPL.ToDocumentPositionList(ref docListArr[0]);
OriginalDocumentPositionList odpl = new OriginalDocumentPositionList();
while (fstODPL.DocumentId >= 0)
{
int curWord = 1;
int firstDocId = fstODPL.DocumentId;
while (curWord < wordIndexesLen)
{
//docListArr[curWord] = wordIndexes[curWord].WordIndex.Get(firstDocId);
wordIndexes[curWord].WordIndex.GetNextOriginalWithDocId(ref odpl, firstDocId);
odpl.ToDocumentPositionList(ref docListArr[curWord]);
if (docListArr[curWord].DocumentId < 0)
{
if ((wordIndexes[curWord].Flags & WordInfo.Flag.Or) != 0)
{
curWord++;
continue;
}
else
{
break;
}
}
curWord++;
} //While
if (curWord >= wordIndexesLen)
{
//Matched
//Caculate score
long totalScore = 0;
Entity.DocumentPositionList lastDocList
= new Hubble.Core.Entity.DocumentPositionList();
for (int i = 0; i < wordIndexesLen; i++)
{
WordIndexForQuery wifq = wordIndexes[i];
if (wifq.WordIndex.Count == 0)
{
//a^5000^0 b^5000^2^1
//if has a and hasn't b but b can be or
//2010-09-30 eaglet
continue;
}
Entity.DocumentPositionList docList = docListArr[i];
long score = (long)wifq.FieldRank * (long)wifq.WordRank * (long)wifq.Idf_t * (long)docList.Count * (long)1000000 / ((long)wifq.Sum_d_t * (long)docList.TotalWordsInThisDocument);
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
double delta = 1;
if (i > 0)
{
//Calculate with position
double queryPositionDelta = wifq.FirstPosition - wordIndexes[i - 1].FirstPosition;
double positionDelta = docList.FirstPosition - lastDocList.FirstPosition;
delta = Math.Abs(queryPositionDelta - positionDelta);
if (delta < 0.031)
{
delta = 0.031;
}
else if (delta <= 1.1)
{
delta = 0.5;
}
else if (delta <= 2.1)
{
delta = 1;
}
delta = Math.Pow((1 / delta), ratio) * docList.Count * lastDocList.Count /
(double)(wifq.QueryCount * wordIndexes[i - 1].QueryCount);
}
lastDocList = docList;
totalScore += (long)(score * delta);
}
bool notInDict = false;
if (_NotInDict != null)
{
if (_NotInDict.ContainsKey(firstDocId))
{
notInDict = true;
}
}
if (!notInDict)
{
if (upDict == null)
{
docIdRank.Add(firstDocId, totalScore);
}
else
{
if (!upDict.Not)
{
if (upDict.ContainsKey(firstDocId))
{
docIdRank.Add(firstDocId, totalScore);
}
}
else
{
if (!upDict.ContainsKey(firstDocId))
{
docIdRank.Add(firstDocId, totalScore);
}
}
}
}
}//if (curWord >= wordIndexesLen)
//fstDocList = fstWifq.WordIndex.GetNext();
//docListArr[0] = fstDocList;
fstWifq.WordIndex.GetNextOriginal(ref fstODPL);
fstODPL.ToDocumentPositionList(ref docListArr[0]);
}
}
//Merge score if upDict != null
if (upDict != null)
{
if (!upDict.Not)
{
foreach (int docid in docIdRank.Keys)
{
DocumentResult *upDrp;
if (upDict.TryGetValue(docid, out upDrp))
{
DocumentResult *drpResult;
if (docIdRank.TryGetValue(docid, out drpResult))
{
drpResult->Score += upDrp->Score;
}
}
}
}
}
DeleteProvider delProvider = _DBProvider.DelProvider;
int delCount = delProvider.Filter(docIdRank);
if (oneWordOptimize && _QueryParameter.CanLoadPartOfDocs && upDict == null)
{
docIdRank.RelTotalCount = wordIndexes[0].RelTotalCount - delCount;
}
else
{
docIdRank.RelTotalCount = docIdRank.Count;
}
performanceReport.Stop();
}
unsafe private void CalculateWithPositionMatch(Core.SFQL.Parse.DocumentResultWhereDictionary upDict,
ref Core.SFQL.Parse.DocumentResultWhereDictionary docIdRank, WordIndexForQuery[] wordIndexes)
{
Array.Sort(wordIndexes);
MinResultCount = _DBProvider.Table.GroupByLimit;
double ratio = 1;
if (wordIndexes.Length > 1)
{
ratio = (double)2 / (double)(wordIndexes.Length - 1);
}
//Get max word doc list count
int maxWordDocListCount = 0;
int documentSum = 0;
foreach (WordIndexForQuery wifq in wordIndexes)
{
maxWordDocListCount += wifq.WordIndex.Count;
}
maxWordDocListCount += maxWordDocListCount / 2;
if (maxWordDocListCount > 1024 * 1024)
{
maxWordDocListCount = 1024 * 1024;
}
if (docIdRank.Count == 0)
{
if (maxWordDocListCount > DocumentResultWhereDictionary.DefaultSize)
{
docIdRank = new Core.SFQL.Parse.DocumentResultWhereDictionary(maxWordDocListCount);
}
}
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport("Calculate");
//Merge
bool oneWordOptimize = this._QueryParameter.CanLoadPartOfDocs && this._QueryParameter.NoAndExpression && wordIndexes.Length == 1;
for (int i = 0; i < wordIndexes.Length; i++)
{
WordIndexForQuery wifq = wordIndexes[i];
//Entity.DocumentPositionList[] wifqDocBuf = wifq.WordIndex.DocPositionBuf;
Entity.DocumentPositionList docList = wifq.WordIndex.GetNext();
int j = 0;
int oneWordMaxCount = 0;
while (docList.DocumentId >= 0)
{
Core.SFQL.Parse.DocumentResultPoint drp;
drp.pDocumentResult = null;
if (oneWordOptimize)
{
if (j > MinResultCount)
{
if (oneWordMaxCount > docList.Count)
{
docList = wifq.WordIndex.GetNext();
j++;
continue;
}
}
else
{
if (oneWordMaxCount < docList.Count)
{
oneWordMaxCount = docList.Count;
}
}
}
if (j > wifq.RelTotalCount)
{
break;
}
long score = (long)wifq.FieldRank * (long)wifq.WordRank * (long)wifq.Idf_t * (long)docList.Count * (long)1000000 / ((long)wifq.Sum_d_t * (long)docList.TotalWordsInThisDocument);
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
bool exits = drp.pDocumentResult != null;
if (!exits && i > 0)
{
exits = docIdRank.TryGetValue(docList.DocumentId, out drp);
}
if (exits)
{
drp.pDocumentResult->Score += score;
double queryPositionDelta = wifq.FirstPosition - drp.pDocumentResult->LastWordIndexFirstPosition;
double positionDelta = docList.FirstPosition - drp.pDocumentResult->LastPosition;
double delta = Math.Abs(queryPositionDelta - positionDelta);
if (delta < 0.031)
{
delta = 0.031;
}
else if (delta <= 1.1)
{
delta = 0.5;
}
else if (delta <= 2.1)
{
delta = 1;
}
delta = Math.Pow((1 / delta), ratio) * docList.Count * drp.pDocumentResult->LastCount /
(double)(wifq.QueryCount * drp.pDocumentResult->LastWordIndexQueryCount);
//some words missed
//if (i - drp.pDocumentResult->LastIndex > 1)
//{
// int sumWordRank = 10;
// for (int k = drp.pDocumentResult->LastIndex + 1; k < i; k++)
// {
// sumWordRank += wordIndexes[k].WordRank;
// }
// delta /= (double)sumWordRank;
//}
drp.pDocumentResult->Score = (long)(drp.pDocumentResult->Score * delta);
drp.pDocumentResult->LastIndex = (UInt16)i;
drp.pDocumentResult->LastPosition = docList.FirstPosition;
drp.pDocumentResult->LastCount = (UInt16)docList.Count;
drp.pDocumentResult->LastWordIndexFirstPosition = (UInt16)wifq.FirstPosition;
}
else
{
//some words missed
//if (i > 0)
//{
// int sumWordRank = 10;
// for (int k = 0; k < i; k++)
// {
// sumWordRank += wordIndexes[k].WordRank;
// }
// double delta = 1 / (double)sumWordRank;
// score = (long)(score * delta);
//}
bool notInDict = false;
if (_NotInDict != null)
{
if (_NotInDict.ContainsKey(docList.DocumentId))
{
notInDict = true;
}
}
if (!notInDict)
{
if (upDict == null)
{
DocumentResult docResult = new DocumentResult(docList.DocumentId, score, wifq.FirstPosition, wifq.QueryCount, docList.FirstPosition, docList.Count, i);
docIdRank.Add(docList.DocumentId, docResult);
}
else
{
if (!upDict.Not)
{
if (upDict.ContainsKey(docList.DocumentId))
{
DocumentResult docResult = new DocumentResult(docList.DocumentId, score, wifq.FirstPosition, wifq.QueryCount, docList.FirstPosition, docList.Count, i);
docIdRank.Add(docList.DocumentId, docResult);
}
}
else
{
if (!upDict.ContainsKey(docList.DocumentId))
{
DocumentResult docResult = new DocumentResult(docList.DocumentId, score, wifq.FirstPosition, wifq.QueryCount, docList.FirstPosition, docList.Count, i);
docIdRank.Add(docList.DocumentId, docResult);
}
}
}
}
}
docList = wifq.WordIndex.GetNext();
j++;
if (j > wifq.WordIndex.Count)
{
break;
}
}
}
//Merge score if upDict != null
if (upDict != null)
{
if (!upDict.Not)
{
foreach (int docid in docIdRank.Keys)
{
DocumentResult *upDrp;
if (upDict.TryGetValue(docid, out upDrp))
{
DocumentResult *drpResult;
if (docIdRank.TryGetValue(docid, out drpResult))
{
drpResult->Score += upDrp->Score;
}
}
}
}
}
//some words missed
//if (wordIndexes.Length > 1)
//{
// List<DocumentResult> reduceDocs = new List<DocumentResult>(docIdRank.Count);
// int lstIndex = wordIndexes.Length - 1;
// foreach (Core.SFQL.Parse.DocumentResultPoint drp in docIdRank.Values)
// {
// DocumentResult* dr = drp.pDocumentResult;
// //DocumentResult* dr1 = drp.pDocumentResult;
// if (dr->LastIndex != lstIndex)
// {
// int sumWordRank = 10;
// for (int k = dr->LastIndex + 1; k <= lstIndex; k++)
// {
// sumWordRank += wordIndexes[k].WordRank;
// }
// double delta = 1 / (double)sumWordRank;
// dr->Score = (long)((double)dr->Score * delta);
// }
// if (dr->Score < 0)
// {
// dr->Score = long.MaxValue / 10;
// }
// }
//}
performanceReport.Stop();
documentSum += docIdRank.Count;
if (documentSum > _TotalDocuments)
{
documentSum = _TotalDocuments;
}
DeleteProvider delProvider = _DBProvider.DelProvider;
int deleteCount = delProvider.Filter(docIdRank);
if (_QueryParameter.CanLoadPartOfDocs && upDict == null)
{
if (docIdRank.Count < wordIndexes[wordIndexes.Length - 1].RelTotalCount)
{
if (wordIndexes.Length > 1)
{
if (wordIndexes[wordIndexes.Length - 1].RelTotalCount > _DBProvider.MaxReturnCount)
{
documentSum += wordIndexes[wordIndexes.Length - 1].RelTotalCount - _DBProvider.MaxReturnCount;
}
if (documentSum > _TotalDocuments)
{
documentSum = _TotalDocuments;
}
docIdRank.RelTotalCount = documentSum;
}
else
{
docIdRank.RelTotalCount = wordIndexes[wordIndexes.Length - 1].RelTotalCount;
}
}
}
docIdRank.RelTotalCount -= deleteCount;
}
unsafe private void Calculate(DocumentResultWhereDictionary upDict,
ref DocumentResultWhereDictionary docIdRank, WordIndexForQuery[] wordIndexes)
{
Array.Sort(wordIndexes);
MinResultCount = _DBProvider.Table.GroupByLimit;
//Get max word doc list count
int maxWordDocListCount = 0;
int documentSum = 0;
foreach (WordIndexForQuery wifq in wordIndexes)
{
maxWordDocListCount += wifq.WordIndex.RelDocCount;
}
if (docIdRank.Count == 0)
{
if (maxWordDocListCount > DocumentResultWhereDictionary.DefaultSize)
{
docIdRank = new Core.SFQL.Parse.DocumentResultWhereDictionary(maxWordDocListCount);
}
}
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport("Calculate");
//Merge
bool oneWordOptimize = this._QueryParameter.CanLoadPartOfDocs && this._QueryParameter.NoAndExpression && wordIndexes.Length == 1;
for (int i = 0; i < wordIndexes.Length; i++)
{
WordIndexForQuery wifq = wordIndexes[i];
//Entity.DocumentPositionList[] wifqDocBuf = wifq.WordIndex.DocPositionBuf;
Entity.DocumentPositionList docList = wifq.WordIndex.GetNext();
int j = 0;
int oneWordMaxCount = 0;
while (docList.DocumentId >= 0)
{
//Entity.DocumentPositionList docList = wifq.WordIndex[j];
Core.SFQL.Parse.DocumentResultPoint drp;
drp.pDocumentResult = null;
if (oneWordOptimize)
{
if (j > MinResultCount)
{
if (j > MinResultCount)
{
if (oneWordMaxCount > docList.Count)
{
docList = wifq.WordIndex.GetNext();
j++;
continue;
}
}
else
{
if (oneWordMaxCount < docList.Count)
{
oneWordMaxCount = docList.Count;
}
}
}
}
long score = (long)wifq.FieldRank * (long)wifq.WordRank * (long)wifq.Idf_t * (long)docList.Count * (long)1000000 / ((long)wifq.Sum_d_t * (long)docList.TotalWordsInThisDocument);
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
bool exits = drp.pDocumentResult != null;
if (!exits && i > 0)
{
exits = docIdRank.TryGetValue(docList.DocumentId, out drp);
}
if (exits)
{
drp.pDocumentResult->Score += score;
}
else
{
bool notInDict = false;
if (_NotInDict != null)
{
if (_NotInDict.ContainsKey(docList.DocumentId))
{
notInDict = true;
}
}
if (!notInDict)
{
if (upDict == null)
{
docIdRank.Add(docList.DocumentId, score);
}
else
{
if (!upDict.Not)
{
if (upDict.ContainsKey(docList.DocumentId))
{
docIdRank.Add(docList.DocumentId, score);
}
}
else
{
if (!upDict.ContainsKey(docList.DocumentId))
{
docIdRank.Add(docList.DocumentId, score);
}
}
}
}
}
docList = wifq.WordIndex.GetNext();
j++;
}
}
//Merge score if upDict != null
if (upDict != null)
{
if (!upDict.Not)
{
foreach (int docid in docIdRank.Keys)
{
DocumentResult *upDrp;
if (upDict.TryGetValue(docid, out upDrp))
{
DocumentResult *drpResult;
if (docIdRank.TryGetValue(docid, out drpResult))
{
drpResult->Score += upDrp->Score;
}
}
}
}
}
documentSum += docIdRank.Count;
if (documentSum > _TotalDocuments)
{
documentSum = _TotalDocuments;
}
DeleteProvider delProvider = _DBProvider.DelProvider;
int deleteCount = delProvider.Filter(docIdRank);
if (_QueryParameter.CanLoadPartOfDocs && upDict == null)
{
if (docIdRank.Count < wordIndexes[wordIndexes.Length - 1].RelTotalCount)
{
if (wordIndexes.Length > 1)
{
if (wordIndexes[wordIndexes.Length - 1].RelTotalCount > _DBProvider.MaxReturnCount)
{
documentSum += wordIndexes[wordIndexes.Length - 1].RelTotalCount - _DBProvider.MaxReturnCount;
}
if (documentSum > _TotalDocuments)
{
documentSum = _TotalDocuments;
}
docIdRank.RelTotalCount = documentSum;
}
else
{
docIdRank.RelTotalCount = wordIndexes[wordIndexes.Length - 1].RelTotalCount;
}
}
}
docIdRank.RelTotalCount -= deleteCount;
performanceReport.Stop();
}
/// <summary>
/// Order by score desc
/// and only one expression in the banch of expression tree.
/// and more than two words
/// </summary>
/// <param name="upDict"></param>
/// <param name="docIdRank"></param>
/// <param name="wordIndexes"></param>
unsafe private void CalculateWithPositionOrderByScoreDesc11(Core.SFQL.Parse.DocumentResultWhereDictionary upDict,
ref Core.SFQL.Parse.DocumentResultWhereDictionary docIdRank, WordIndexForQuery[] wordIndexes)
{
if (upDict != null)
{
throw new ParseException("UpDict is not null!");
}
Array.Sort(wordIndexes);
//Calculate top
int top;
if (this._QueryParameter.End >= 0)
{
top = (1 + this._QueryParameter.End / 100) * 100;
if (top <= 0)
{
top = 100;
}
//if (this._QueryParameter.End * 2 > top)
//{
// top *= 2;
//}
}
else
{
top = int.MaxValue;
}
double ratio = 1;
if (wordIndexes.Length > 1)
{
ratio = (double)2 / (double)(wordIndexes.Length - 1);
}
//Get max word doc list count
int maxWordDocListCount = 0;
int documentSum = 0;
foreach (WordIndexForQuery wifq in wordIndexes)
{
maxWordDocListCount += wifq.WordIndex.Count;
}
maxWordDocListCount += maxWordDocListCount / 2;
if (maxWordDocListCount > 1024 * 1024)
{
maxWordDocListCount = 1024 * 1024;
}
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport("Calculate");
bool groupbyScanAll = false;
//Match for group by
if (this._QueryParameter.NeedGroupBy)
{
groupbyScanAll = true;
int groupbyContainsCount = 0;
int groupbyLimit = _DBProvider.Table.GroupByLimit;
BitSet bitSet = new BitSet();
for (int i = 0; i < wordIndexes.Length; i++)
{
WordIndexForQuery wifq = wordIndexes[i];
Entity.DocumentPositionList docList = wifq.WordIndex.GetNext();
while (docList.DocumentId >= 0)
{
if (bitSet.ForceAdd(docList.DocumentId))
{
groupbyContainsCount++;
}
if (groupbyContainsCount >= groupbyLimit)
{
groupbyScanAll = false;
break;
}
docList = wifq.WordIndex.GetNext();
}
wifq.WordIndex.Reset();
if (!groupbyScanAll)
{
break;
}
}
AscIntList groupByCollect = new AscIntList();
groupByCollect.AddRange(bitSet);
}
//Merge
int indexInTop = 0;
for (int i = 0; i < wordIndexes.Length; i++)
{
if (docIdRank.Count >= top)
{
break;
}
indexInTop = i;
WordIndexForQuery wifq = wordIndexes[i];
//Entity.DocumentPositionList[] wifqDocBuf = wifq.WordIndex.DocPositionBuf;
Entity.DocumentPositionList docList = wifq.WordIndex.GetNext();
int j = 0;
while (docList.DocumentId >= 0)
{
Core.SFQL.Parse.DocumentResultPoint drp;
drp.pDocumentResult = null;
long score = (long)wifq.FieldRank * (long)wifq.WordRank * (long)wifq.Idf_t * (long)docList.Count * (long)1000000 / ((long)wifq.Sum_d_t * (long)docList.TotalWordsInThisDocument);
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
else
{
switch (i)
{
case 0:
score *= 20;
break;
case 1:
score *= 4;
break;
case 2:
score *= 1;
break;
case 3:
score /= 2;
break;
default:
score /= i;
break;
}
}
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
bool exits = drp.pDocumentResult != null;
if (!exits && i > 0)
{
exits = docIdRank.TryGetValue(docList.DocumentId, out drp);
}
if (exits)
{
drp.pDocumentResult->Score += score;
drp.pDocumentResult->HitCount++;
double queryPositionDelta = wifq.FirstPosition - drp.pDocumentResult->LastWordIndexFirstPosition;
double positionDelta = docList.FirstPosition - drp.pDocumentResult->LastPosition;
double delta = Math.Abs(queryPositionDelta - positionDelta);
if (delta < 0.031)
{
delta = 0.031;
}
else if (delta <= 1.1)
{
delta = 0.5;
}
else if (delta <= 2.1)
{
delta = 1;
}
delta = Math.Pow((1 / delta), ratio) * docList.Count * drp.pDocumentResult->LastCount /
(double)(wifq.QueryCount * drp.pDocumentResult->LastWordIndexQueryCount);
drp.pDocumentResult->Score = (long)(drp.pDocumentResult->Score * delta);
//Overflow, if match too much, sometime score would less than zero.
if (drp.pDocumentResult->Score < 0)
{
drp.pDocumentResult->Score = long.MaxValue - 4000000;
}
drp.pDocumentResult->LastIndex = (UInt16)i;
drp.pDocumentResult->LastPosition = docList.FirstPosition;
drp.pDocumentResult->LastCount = (UInt16)docList.Count;
drp.pDocumentResult->LastWordIndexFirstPosition = (UInt16)wifq.FirstPosition;
}
else
{
bool notInDict = false;
if (_NotInDict != null)
{
if (_NotInDict.ContainsKey(docList.DocumentId))
{
notInDict = true;
}
}
if (!notInDict)
{
//upDict is null in this function
DocumentResult docResult = new DocumentResult(docList.DocumentId, score, wifq.FirstPosition, wifq.QueryCount, docList.FirstPosition, docList.Count, i);
docIdRank.Add(docList.DocumentId, docResult);
}
}
docList = wifq.WordIndex.GetNext();
j++;
if (j > wifq.WordIndex.Count)
{
break;
}
}
}
long maxScoreValue = 0; //Max score value of the docid that hit count less than wordIndexes.Length
int wordIndexesLen = wordIndexes.Length;
//Get the max score value of the docs that hit count less than wordIndexes.Length
foreach (DocumentResultPoint docResult in docIdRank.Values)
{
if (docResult.pDocumentResult->HitCount < wordIndexesLen)
{
if (docResult.pDocumentResult->Score > maxScoreValue)
{
maxScoreValue = docResult.pDocumentResult->Score;
}
}
}
double hitRate = 0;
if (indexInTop < wordIndexes.Length - 1)
{
int[] docidlist = new int[docIdRank.Count];
int i = 0;
foreach (int docid in docIdRank.Keys)
{
docidlist[i] = docid;
i++;
}
Array.Sort(docidlist);
int lastWordHitCount = 0;
foreach (int firstDocId in docidlist)
{
int curWord = indexInTop + 1;
Core.SFQL.Parse.DocumentResultPoint drp;
if (docIdRank.TryGetValue(firstDocId, out drp))
{
while (curWord < wordIndexesLen)
{
Entity.DocumentPositionList docList = wordIndexes[curWord].WordIndex.Get(firstDocId);
int curDocId = docList.DocumentId;
if (curDocId >= 0)
{
drp.pDocumentResult->HitCount++;
if (curWord == wordIndexesLen - 1)
{
lastWordHitCount++;
}
WordIndexForQuery wifq = wordIndexes[curWord];
long score = (long)wifq.FieldRank * (long)wifq.WordRank * (long)wifq.Idf_t * (long)docList.Count * (long)1000000 / ((long)wifq.Sum_d_t * (long)docList.TotalWordsInThisDocument);
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
else
{
switch (curWord)
{
case 0:
score *= 20;
break;
case 1:
score *= 4;
break;
case 2:
score *= 1;
break;
case 3:
score /= 2;
break;
default:
score /= curWord;
break;
}
}
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
drp.pDocumentResult->Score += score;
double queryPositionDelta = wifq.FirstPosition - drp.pDocumentResult->LastWordIndexFirstPosition;
double positionDelta = docList.FirstPosition - drp.pDocumentResult->LastPosition;
double delta = Math.Abs(queryPositionDelta - positionDelta);
if (delta < 0.031)
{
delta = 0.031;
}
else if (delta <= 1.1)
{
delta = 0.5;
}
else if (delta <= 2.1)
{
delta = 1;
}
delta = Math.Pow((1 / delta), ratio) * docList.Count * drp.pDocumentResult->LastCount /
(double)(wifq.QueryCount * drp.pDocumentResult->LastWordIndexQueryCount);
drp.pDocumentResult->Score = (long)(drp.pDocumentResult->Score * delta);
//Overflow, if match too much, sometime score would less than zero.
if (drp.pDocumentResult->Score < 0)
{
drp.pDocumentResult->Score = long.MaxValue - 4000000;
}
drp.pDocumentResult->LastIndex = (UInt16)curWord;
drp.pDocumentResult->LastPosition = docList.FirstPosition;
drp.pDocumentResult->LastCount = (UInt16)docList.Count;
drp.pDocumentResult->LastWordIndexFirstPosition = (UInt16)wifq.FirstPosition;
}
curWord++;
} //While
if (drp.pDocumentResult->HitCount < wordIndexesLen)
{
if (drp.pDocumentResult->Score > maxScoreValue)
{
maxScoreValue = drp.pDocumentResult->Score;
}
}
}
}
if (docidlist.Length > 0)
{
hitRate = (double)lastWordHitCount / (double)docidlist.Length;
}
}
//Adjust score of the docs that hit count equal wordIndexes.Length
foreach (DocumentResultPoint docResult in docIdRank.Values)
{
if (docResult.pDocumentResult->HitCount == wordIndexesLen)
{
docResult.pDocumentResult->Score += maxScoreValue;
if (docResult.pDocumentResult->Score < 0)
{
docResult.pDocumentResult->Score = long.MaxValue;
}
}
}
performanceReport.Stop();
documentSum += docIdRank.Count;
if (indexInTop < wordIndexes.Length - 1)
{
documentSum += wordIndexes[wordIndexes.Length - 1].RelTotalCount;
if (hitRate > 0)
{
int predictCount = 0;
for (int i = indexInTop + 1; i < wordIndexes.Length - 1; i++)
{
predictCount += (int)(wordIndexes[i].RelTotalCount * (1 - hitRate));
}
documentSum += predictCount;
}
}
if (documentSum > _TotalDocuments)
{
documentSum = _TotalDocuments;
}
docIdRank.RelTotalCount = documentSum;
DeleteProvider delProvider = _DBProvider.DelProvider;
int deleteCount = delProvider.Filter(docIdRank);
docIdRank.RelTotalCount -= deleteCount;
if (groupbyScanAll)
{
docIdRank.RelTotalCount = docIdRank.GroupByCollection.Count;
}
else if (docIdRank.GroupByCollection.Count > docIdRank.RelTotalCount)
{
docIdRank.RelTotalCount = docIdRank.GroupByCollection.Count;
}
}
public Core.SFQL.Parse.DocumentResultWhereDictionary Search()
{
Query.PerformanceReport performanceReport = new Hubble.Core.Query.PerformanceReport("Search of Match");
Init();
Core.SFQL.Parse.DocumentResultWhereDictionary result = new Core.SFQL.Parse.DocumentResultWhereDictionary();
if (_QueryWords.Count <= 0 || _WordIndexes.Length <= 0)
{
if (_QueryParameter.Not && UpDict != null)
{
return(UpDict);
}
else
{
return(result);
}
}
if (this._QueryParameter.Not)
{
if (_InvertedIndex.IndexMode == Field.IndexMode.Simple)
{
Calculate(null, ref result, _WordIndexes);
}
else
{
//For not, we have to return all of the records
//Modified at 18 Jan 2012
CalculateWithPosition(null, ref result, _WordIndexes);
//if (Optimize.OptimizeArgument.IsOrderByScoreDesc(this._QueryParameter.OrderBys) &&
// !this._QueryParameter.NeedDistinct && this._QueryParameter.CanLoadPartOfDocs
// && this._QueryParameter.AndExpressionCanBeOptimized(_DBProvider)
// && _WordIndexes.Length > 1 && this.UpDict == null)
//{
// CalculateWithPositionOrderByScoreDesc(null, ref result, _WordIndexes);
//}
//else
//{
// CalculateWithPosition(null, ref result, _WordIndexes);
//}
}
}
else
{
if (_InvertedIndex.IndexMode == Field.IndexMode.Simple)
{
Calculate(this.UpDict, ref result, _WordIndexes);
}
else
{
if (//Optimize.OptimizeArgument.IsOrderByScoreDesc(this._QueryParameter.OrderBys) &&
!this._QueryParameter.NeedDistinct && this._QueryParameter.CanLoadPartOfDocs &&
this._QueryParameter.AndExpressionCanBeOptimized(_DBProvider) &&
_WordIndexes.Length > 1 && this.UpDict == null)
{
IQueryOptimize qOptimize = QueryOptimizeBuilder.Build(typeof(MatchOptimize),
DBProvider, _QueryParameter.End, _QueryParameter.OrderBy,
_QueryParameter.OrderBys, _QueryParameter.NeedGroupBy,
_QueryParameter.OrderByCanBeOptimized, _QueryParameter.NeedFilterUntokenizedConditions(this._DBProvider),
_QueryParameter.UntokenizedTreeOnRoot, _WordIndexes);
Query.PerformanceReport performanceReportCalculate = null;
try
{
performanceReportCalculate = new Hubble.Core.Query.PerformanceReport("Calculate");
qOptimize.CalculateOptimize(this.UpDict, ref result);
}
finally
{
performanceReportCalculate.Stop();
}
}
else
{
CalculateWithPosition(this.UpDict, ref result, _WordIndexes);
}
}
}
if (this._QueryParameter.Not)
{
result.Not = true;
if (UpDict != null)
{
result = result.AndMergeForNot(result, UpDict);
}
}
performanceReport.Stop();
return(result);
}