int _IndexThreshold = 0; //for optimize by score. Only return when index <= _IndexThreshold.
/// <summary>
///
/// </summary>
/// <param name="wordIndexes">word indexes informations</param>
/// <param name="dbProvider">current dbprovider</param>
/// <param name="dictForGroupBy">dict to calculate group by. If is null, don't need output group by</param>
/// <param name="top">for optimize by score, how many records want to return</param>
public MultiWordsDocIdEnumerator(WordIndexForQuery[] wordIndexes, DBProvider dbProvider,
Hubble.Core.SFQL.Parse.DocumentResultWhereDictionary dictForGroupBy, int top, bool needFilterUntokenizedConditions)
{
_GroupByDict = dictForGroupBy;
_NeedGroupBy = _GroupByDict != null;
_DBProvider = dbProvider;
WordIndexes = wordIndexes;
Array.Sort(WordIndexes);
if (_NeedGroupBy)
{
_GroupByLimit = _DBProvider.Table.GroupByLimit;
_GroupByStep = WordIndexes[WordIndexes.Length - 1].RelTotalCount / _GroupByLimit;
if (_GroupByStep <= 0)
{
_GroupByStep = 1;
}
}
_OptimizeByScore = false;
if (top >= 0 && !needFilterUntokenizedConditions)
{
_OptimizeByScore = true;
int relTop = top + _DBProvider.DelProvider.Count; //should include del records
_IndexThreshold = -1;
long sum = 0;
while (sum < relTop)
{
_IndexThreshold++;
if (_IndexThreshold >= WordIndexes.Length)
{
_OptimizeByScore = false;
break;
}
sum += WordIndexes[_IndexThreshold].RelTotalCount;
}
}
Reset();
}
public MultiWordsDocIdEnumerator(WordIndexForQuery[] wordIndexes, DBProvider dbProvider,
Hubble.Core.SFQL.Parse.DocumentResultWhereDictionary dictForGroupBy)
: this(wordIndexes, dbProvider, dictForGroupBy, -1, false)
{
}
