unsafe private bool GetNext(WordIndexForQuery fstWifq,
ref OriginalDocumentPositionList fstODPL, ref Entity.DocumentPositionList fstDPL)
{
fstWifq.WordIndex.GetNextOriginal(ref fstODPL);
fstODPL.ToDocumentPositionList(ref fstDPL);
return(fstODPL.DocumentId >= 0);
#if a
if (!_HasRandField)
{
}
else
{
if (_CurDocidPayloadIndex >= _CurDocidPayloadsCount)
{
_CurDocidPayloadsCount = LoadDocIdPayloads();
if (_CurDocidPayloadsCount <= 0)
{
fstODPL.DocumentId = -1;
return;
//return new OriginalDocumentPositionList(-1);
}
}
fstODPL.DocumentId = _DocidPayloads[_CurDocidPayloadIndex].DocumentId;
fstODPL.CountAndWordCount = _DocidPayloads[_CurDocidPayloadIndex].CountAndWordCount;
//odpl = _DocidPayloads[_CurDocidPayloadIndex++];
_CurDocidPayloadIndex++;
return(true);
}
#endif
}
public void Run()
{
if (Parameters.Count != 3)
{
throw new StoredProcException("First parameter is table name, second parameter is field name, third parameter is words. SP_GetIDF 'tablename', 'fieldname', 'abc news'");
}
string tableName = Parameters[0];
string fieldName = Parameters[1];
Data.DBProvider dbProvider = Data.DBProvider.GetDBProvider(tableName);
if (dbProvider == null)
{
throw new StoredProcException(string.Format("Table name {0} does not exist!", tableName));
}
Hubble.Core.Index.InvertedIndex invertedIndex = dbProvider.GetInvertedIndex(fieldName);
if (invertedIndex == null)
{
throw new StoredProcException(string.Format("Field name {0} does not exist or is not the tokenized index field!", fieldName));
}
string queryStr = Parameters[2];
List <WordInfo> wordInfos = ParseWhere.GetWordInfoList(queryStr);
Dictionary <string, WordIndexForQuery> wordIndexDict = new Dictionary <string, WordIndexForQuery>();
foreach (Hubble.Core.Entity.WordInfo wordInfo in wordInfos)
{
WordIndexForQuery wifq;
if (!wordIndexDict.TryGetValue(wordInfo.Word, out wifq))
{
//Hubble.Core.Index.WordIndexReader wordIndex = InvertedIndex.GetWordIndex(wordInfo.Word, CanLoadPartOfDocs); //Get whole index
Hubble.Core.Index.WordIndexReader wordIndex = invertedIndex.GetWordIndex(wordInfo.Word, false, true); //Only get step doc index
if (wordIndex == null)
{
wordIndexDict.Add(wordInfo.Word, null);
continue;
}
wifq = new WordIndexForQuery(wordIndex,
invertedIndex.DocumentCount, wordInfo.Rank, 1);
wifq.QueryCount = 1;
wifq.FirstPosition = wordInfo.Position;
wordIndexDict.Add(wordInfo.Word, wifq);
}
else
{
wifq.WordRank += wordInfo.Rank;
wifq.QueryCount++;
}
//wordIndexList[wordIndexList.Count - 1].Rank += wordInfo.Rank;
}
AddColumn("Word");
AddColumn("TF");
AddColumn("IDF");
AddColumn("T_D");
AddColumn("TotalDoucments");
AddColumn("TF_IDF");
int totalDocuments = invertedIndex.DocumentCount;
foreach (string word in wordIndexDict.Keys)
{
NewRow();
WordIndexForQuery wifq = wordIndexDict[word];
OutputValue("Word", word);
if (wifq == null)
{
OutputValue("TF", 0);
OutputValue("T_D", 0);
OutputValue("TotalDoucments", 0);
OutputValue("IDF", 0);
OutputValue("TF_IDF", 0);
}
else
{
double idf = Math.Log((double)totalDocuments / (double)wifq.RelTotalCount);
OutputValue("TF", wifq.QueryCount);
OutputValue("T_D", wifq.RelTotalCount);
OutputValue("TotalDoucments", totalDocuments);
OutputValue("IDF", idf);
OutputValue("TF_IDF", wifq.QueryCount * idf);
}
}
}
private unsafe void CalculateNormal(Hubble.Core.SFQL.Parse.DocumentResultWhereDictionary upDict, ref Hubble.Core.SFQL.Parse.DocumentResultWhereDictionary docIdRank)
{
DBProvider dBProvider = Argument.DBProvider;
bool needGroupBy = Argument.NeedGroupBy;
bool needFilterUntokenizedConditions = this.Argument.NeedFilterUntokenizedConditions;
ExpressionTree untokenizedTree = this.Argument.UntokenizedTreeOnRoot;
Query.DocumentResult documentResult;
Query.DocumentResult *drp = &documentResult;
//vars for delete
bool haveRecordsDeleted = dBProvider.DelProvider.Count > 0;
int[] delDocs = null;
int curDelIndex = 0;
int curDelDocid = 0;
Field[] orderByFields;
DocId2LongComparer comparer = DocId2LongComparer.Generate(
dBProvider, Argument.OrderBys, out orderByFields);
if (haveRecordsDeleted)
{
delDocs = dBProvider.DelProvider.DelDocs;
curDelDocid = delDocs[curDelIndex];
}
double ratio = 1;
WordIndexForQuery[] wordIndexes = WordIndexes;
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();
//Entity.DocumentPositionList fstDocList = fstWifq.WordIndex.GetNext();
Entity.DocumentPositionList[] docListArr = new Hubble.Core.Entity.DocumentPositionList[wordIndexesLen];
//docListArr[0] = fstDocList;
//fstWifq.WordIndex.GetNextOriginal(ref fstODPL);
//fstODPL.ToDocumentPositionList(ref docListArr[0]);
GetNext(fstWifq, ref fstODPL, ref docListArr[0]);
OriginalDocumentPositionList odpl = new OriginalDocumentPositionList();
Entity.DocumentPositionList lastDocList
= new Hubble.Core.Entity.DocumentPositionList();
int top;
//calculate top
//If less than 100, set to 100
if (this.Argument.End >= 0)
{
top = (1 + this.Argument.End / 100) * 100;
if (top <= 0)
{
top = 100;
}
//if (this.Argument.End * 2 > top)
//{
// top *= 2;
//}
}
else
{
top = int.MaxValue;
}
PriorQueue <Docid2Long> priorQueue = new PriorQueue <Docid2Long>(top, comparer);
int rows = 0;
Docid2Long cur = new Docid2Long();
Docid2Long last = new Docid2Long();
last.DocId = -1;
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)
{
//Process untokenized conditions.
//If is not matched, get the next one.
if (needFilterUntokenizedConditions)
{
int docId = firstDocId;
drp->DocId = docId;
drp->PayloadData = dBProvider.GetPayloadDataWithShareLock(docId);
if (!ParseWhere.GetComparisionExpressionValue(dBProvider, drp,
untokenizedTree))
{
GetNext(fstWifq, ref fstODPL, ref docListArr[0]);
continue;
}
}
//Matched
//Caculate score
long totalScore = 0;
lastDocList.Count = 0;
lastDocList.FirstPosition = 0;
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.Count = docList.Count;
lastDocList.FirstPosition = docList.FirstPosition;
totalScore += (long)(score * delta);
} //End for cycle
if (haveRecordsDeleted)
{
if (curDelIndex < delDocs.Length)
{
//If docid deleted, get next
if (firstDocId == curDelDocid)
{
GetNext(fstWifq, ref fstODPL, ref docListArr[0]);
continue;
}
else if (firstDocId > curDelDocid)
{
while (curDelIndex < delDocs.Length && curDelDocid < firstDocId)
{
curDelIndex++;
if (curDelIndex >= delDocs.Length)
{
haveRecordsDeleted = false;
break;
}
curDelDocid = delDocs[curDelIndex];
}
if (curDelIndex < delDocs.Length)
{
if (firstDocId == curDelDocid)
{
GetNext(fstWifq, ref fstODPL, ref docListArr[0]);
continue;
}
}
}
}
}
if (needGroupBy)
{
docIdRank.AddToGroupByCollection(firstDocId);
}
if (_HasRankField)
{
int rank = dBProvider.SharedPayloadProvider.GetPayloadRank(firstDocId);
totalScore *= rank;
if (totalScore < 0)
{
totalScore = long.MaxValue - 4000000;
}
}
if (rows >= top)
{
rows++;
cur.DocId = firstDocId;
Docid2Long.Generate(ref cur, dBProvider, orderByFields, totalScore);
if (comparer.Compare(last, cur) > 0)
{
priorQueue.Add(cur);
last = priorQueue.Last;
}
}
else
{
cur.DocId = firstDocId;
Docid2Long.Generate(ref cur, dBProvider, orderByFields, totalScore);
priorQueue.Add(cur);
rows++;
if (rows == top)
{
last = priorQueue.Last;
}
}
//docIdRank.Add(firstDocId, totalScore);
}//if (curWord >= wordIndexesLen)
GetNext(fstWifq, ref fstODPL, ref docListArr[0]);
//fstWifq.WordIndex.GetNextOriginal(ref fstODPL);
//fstODPL.ToDocumentPositionList(ref docListArr[0]);
}
docIdRank.RelTotalCount = rows;
foreach (Docid2Long docid2Long in priorQueue.ToArray())
{
long score = comparer.GetScore(docid2Long);
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
docIdRank.Add(docid2Long.DocId, new DocumentResult(docid2Long.DocId, score));
}
docIdRank.Sorted = true;
}
unsafe private void CalculateWithPositionOrderByScoreDesc(Core.SFQL.Parse.DocumentResultWhereDictionary upDict,
ref Core.SFQL.Parse.DocumentResultWhereDictionary docIdRank, WordIndexForQuery[] wordIndexes)
{
DBProvider dbProvider = Argument.DBProvider;
bool needFilterUntokenizedConditions = this.Argument.NeedFilterUntokenizedConditions;
ExpressionTree untokenizedTree = this.Argument.UntokenizedTreeOnRoot;
if (upDict != null)
{
throw new ParseException("UpDict is not null!");
}
//Calculate top
int top;
if (Argument.End >= 0)
{
top = (1 + Argument.End / 100) * 100;
if (top <= 0)
{
top = 100;
}
}
else
{
top = int.MaxValue;
}
PriorQueue <Docid2Long> priorQueue = null;
List <Docid2Long> docid2longList = null;
if (top == int.MaxValue)
{
docid2longList = new List <Docid2Long>();
}
else
{
priorQueue = new PriorQueue <Docid2Long>(top, new DocIdLongComparer(false));
}
long lastMinScore = 0;
int rows = 0;
Core.SFQL.Parse.DocumentResultWhereDictionary groupByDict = Argument.NeedGroupBy ? docIdRank : null;
MultiWordsDocIdEnumerator mwde = new MultiWordsDocIdEnumerator(wordIndexes, dbProvider, groupByDict, -1,
needFilterUntokenizedConditions); //Changed at 2012-3-18, top optimize will effect search result, disable it.
//MultiWordsDocIdEnumerator mwde = new MultiWordsDocIdEnumerator(wordIndexes, dbProvider, groupByDict, top,
// needFilterUntokenizedConditions);
Entity.OriginalDocumentPositionList odpl = new Hubble.Core.Entity.OriginalDocumentPositionList();
mwde.GetNextOriginal(ref odpl);
Entity.DocumentPositionList lastDocList
= new Hubble.Core.Entity.DocumentPositionList();
double ratio = 1;
if (wordIndexes.Length > 1)
{
ratio = (double)2 / (double)(wordIndexes.Length - 1);
}
Query.DocumentResult documentResult;
Query.DocumentResult *drp = &documentResult;
int skipCount = 0; //skip by filter untokenized conditions
while (odpl.DocumentId >= 0)
{
//Process untokenized conditions.
//If is not matched, get the next one.
if (needFilterUntokenizedConditions)
{
int docId = odpl.DocumentId;
drp->DocId = docId;
drp->PayloadData = dbProvider.GetPayloadDataWithShareLock(docId);
if (!ParseWhere.GetComparisionExpressionValue(dbProvider, drp,
untokenizedTree))
{
mwde.GetNextOriginal(ref odpl);
skipCount++;
continue;
}
}
//Matched
//Caculate score
#region Caclate score
long totalScore = 0;
lastDocList.Count = 0;
lastDocList.FirstPosition = 0;
int lastWifqIndex = 0;
for (int i = 0; i < mwde.SelectedCount; i++)
{
int index = mwde.SelectedIndexes[i];
WordIndexForQuery wifq = mwde.WordIndexes[index];
Int16 count = (Int16)mwde.SelectedDocLists[i].Count;
int firstPosition = mwde.SelectedDocLists[i].FirstPosition;
int totalWordsInThisDocument = mwde.SelectedDocLists[i].TotalWordsInThisDocument;
long score = (long)wifq.FieldRank * (long)wifq.WordRank * (long)wifq.Idf_t * (long)count * (long)1000000 / ((long)wifq.Sum_d_t * (long)totalWordsInThisDocument);
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
double delta = 1;
if (i > 0)
{
//Calculate with position
double queryPositionDelta = wifq.FirstPosition - wordIndexes[lastWifqIndex].FirstPosition;
double positionDelta = 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) * count * lastDocList.Count /
(double)(wifq.QueryCount * wordIndexes[lastWifqIndex].QueryCount);
}
lastDocList.Count = count;
lastDocList.FirstPosition = firstPosition;
lastWifqIndex = index;
totalScore += (long)(score * delta);
} //End of score calculation
if (_HasRankField)
{
int rank = dbProvider.SharedPayloadProvider.GetPayloadRank(odpl.DocumentId);
totalScore *= rank;
if (totalScore < 0)
{
totalScore = long.MaxValue - 4000000;
}
}
//all of the words matched
//10 times
if (mwde.SelectedCount == wordIndexes.Length)
{
totalScore *= 10;
if (totalScore < 0)
{
totalScore = long.MaxValue - 4000000;
}
}
#endregion
//Insert to prior queue
if (rows >= top)
{
if (lastMinScore < totalScore)
{
priorQueue.Add(new Docid2Long(odpl.DocumentId, totalScore));
lastMinScore = priorQueue.Last.Value1;
}
}
else
{
if (top == int.MaxValue)
{
docid2longList.Add(new Docid2Long(odpl.DocumentId, totalScore));
}
else
{
priorQueue.Add(new Docid2Long(odpl.DocumentId, totalScore));
rows++;
if (rows == top)
{
lastMinScore = priorQueue.Last.Value1;
}
}
}
mwde.GetNextOriginal(ref odpl);
}
docIdRank.RelTotalCount = mwde.TotalDocIdCount - skipCount;
Docid2Long[] docid2longArr;
if (top == int.MaxValue)
{
docid2longList.Sort(new DocIdLongComparer(false));
docid2longArr = docid2longList.ToArray();
}
else
{
docid2longArr = priorQueue.ToArray();
}
foreach (Docid2Long docid2Long in docid2longArr)
{
long score = docid2Long.Value1;
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
docIdRank.Add(docid2Long.DocId, new DocumentResult(docid2Long.DocId, score));
}
docIdRank.Sorted = true;
}
internal int Index; //index of _WordIndexes
internal WordDocIdEntity(int index, WordIndexForQuery wordIndex)
{
this.Index = index;
this.WordIndex = wordIndex;
}
/// <summary>
/// order by except only order by score desc.
/// </summary>
/// <param name="upDict"></param>
/// <param name="docIdRank"></param>
unsafe public void CalculateOptimizeNormalOrderBy(Core.SFQL.Parse.DocumentResultWhereDictionary upDict,
ref Core.SFQL.Parse.DocumentResultWhereDictionary docIdRank)
{
DBProvider dBProvider = Argument.DBProvider;
Argument.DBProvider.SharedPayloadProvider.EnterPayloladShareLock();
bool needFilterUntokenizedConditions = this.Argument.NeedFilterUntokenizedConditions;
ExpressionTree untokenizedTree = this.Argument.UntokenizedTreeOnRoot;
Query.DocumentResult documentResult;
Query.DocumentResult *drp = &documentResult;
bool orderByIncludingScore = Argument.OrderByIncludingScore();
try
{
Field[] orderByFields;
DocId2LongComparer comparer = DocId2LongComparer.Generate(
dBProvider, Argument.OrderBys, out orderByFields);
bool needGroupBy = Argument.NeedGroupBy;
WordIndexForQuery wifq = WordIndexes[0];
_IndexReader = wifq.WordIndex.IndexReader;
Data.Field rankField = Argument.DBProvider.GetField("Rank");
if (rankField != null)
{
if (rankField.DataType == Hubble.Core.Data.DataType.Int &&
rankField.IndexType == Hubble.Core.Data.Field.Index.Untokenized)
{
_HasRandField = true;
_RankTab = rankField.TabIndex;
_DocidPayloads = new OriginalDocumentPositionList[2 * 1024];
_CurDocidPayloadIndex = _DocidPayloads.Length;
}
}
if (_IndexReader != null)
{
int top;
//vars for delete
bool haveRecordsDeleted = dBProvider.DelProvider.Count > 0;
int[] delDocs = null;
int curDelIndex = 0;
int curDelDocid = 0;
int groupByCount = 0;
int groupByLen = dBProvider.Table.GroupByLimit;
int groupByStep = 1;
int groupByIndex = 0;
if (needGroupBy)
{
groupByStep = wifq.RelTotalCount / groupByLen;
if (groupByStep <= 0)
{
groupByStep = 1;
}
}
if (haveRecordsDeleted)
{
delDocs = dBProvider.DelProvider.DelDocs;
curDelDocid = delDocs[curDelIndex];
}
try
{
//calculate top
//If less than 100, set to 100
if (this.Argument.End >= 0)
{
top = (1 + this.Argument.End / 100) * 100;
if (top <= 0)
{
top = 100;
}
//if (this.Argument.End * 2 > top)
//{
// top *= 2;
//}
}
else
{
top = int.MaxValue;
}
PriorQueue <Docid2Long> priorQueue = new PriorQueue <Docid2Long>(top, comparer);
int rows = 0;
Entity.OriginalDocumentPositionList docList = new OriginalDocumentPositionList();
bool notEOF = GetNext(ref docList);
Index.WordIndexReader wordIndexReader = wifq.WordIndex;
Docid2Long last = new Docid2Long();
last.DocId = -1;
int relCount = 0;
while (notEOF)
{
//Process untokenized conditions.
//If is not matched, get the next one.
if (needFilterUntokenizedConditions)
{
int docId = docList.DocumentId;
drp->DocId = docId;
drp->PayloadData = dBProvider.GetPayloadDataWithShareLock(docId);
if (!ParseWhere.GetComparisionExpressionValue(dBProvider, drp,
untokenizedTree))
{
notEOF = GetNext(ref docList);
continue;
}
}
//Process deleted records
if (haveRecordsDeleted)
{
if (curDelIndex < delDocs.Length)
{
//If docid deleted, get next
if (docList.DocumentId == curDelDocid)
{
notEOF = GetNext(ref docList);
continue;
}
else if (docList.DocumentId > curDelDocid)
{
while (curDelIndex < delDocs.Length && curDelDocid < docList.DocumentId)
{
curDelIndex++;
if (curDelIndex >= delDocs.Length)
{
haveRecordsDeleted = false;
break;
}
curDelDocid = delDocs[curDelIndex];
}
if (curDelIndex < delDocs.Length)
{
if (docList.DocumentId == curDelDocid)
{
notEOF = GetNext(ref docList);
continue;
}
}
}
}
}
if (needGroupBy)
{
if (groupByCount < groupByLen)
{
if (groupByIndex >= groupByStep)
{
groupByIndex = 0;
}
if (groupByIndex == 0)
{
docIdRank.AddToGroupByCollection(docList.DocumentId);
groupByCount++;
}
groupByIndex++;
}
}
relCount++;
Docid2Long cur = new Docid2Long();
if (rows >= top)
{
long score = 1;
if (orderByIncludingScore)
{
int wordCount = docList.CountAndWordCount / 8; //one word, score = count
score = (long)wifq.FieldRank * (long)wifq.WordRank * (long)wifq.Idf_t * (long)wordCount * (long)1000000 /
((long)wifq.Sum_d_t * (long)docList.TotalWordsInThisDocument);
}
cur.DocId = docList.DocumentId;
cur.Rank = docList.TotalWordsInThisDocument;
Docid2Long.Generate(ref cur, dBProvider, orderByFields, score);
if (comparer.Compare(last, cur) > 0)
{
priorQueue.Add(cur);
last = priorQueue.Last;
}
}
else
{
long score = 1;
if (orderByIncludingScore)
{
int wordCount = docList.CountAndWordCount / 8; //one word, score = count
score = (long)wifq.FieldRank * (long)wifq.WordRank * (long)wifq.Idf_t * (long)wordCount * (long)1000000 /
((long)wifq.Sum_d_t * (long)docList.TotalWordsInThisDocument);
}
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
cur.DocId = docList.DocumentId;
cur.Rank = docList.TotalWordsInThisDocument;
Docid2Long.Generate(ref cur, dBProvider, orderByFields, score);
priorQueue.Add(cur);
rows++;
if (rows == top)
{
last = priorQueue.Last;
}
}
notEOF = GetNext(ref docList);
}
docIdRank.RelTotalCount = relCount;
foreach (Docid2Long docid2Long in priorQueue.ToArray())
{
long score = comparer.GetScore(docid2Long); //use Rank store TotalWordsInThisDocument
if (score < 0)
{
//Overflow
score = long.MaxValue - 4000000;
}
docIdRank.Add(docid2Long.DocId, new DocumentResult(docid2Long.DocId, score));
}
}
finally
{
}
docIdRank.Sorted = true;
}
}
finally
{
Argument.DBProvider.SharedPayloadProvider.LeavePayloadShareLock();
}
}