/// <summary>
/// Get key for the values of group by feilds
/// </summary>
/// <param name="docid"></param>
/// <returns></returns>
unsafe private ulong GetKey(ref Query.DocumentResultForSort result)
{
int *payloadData = result.PayloadData;
int docid = result.DocId;
if (payloadData == null)
{
payloadData = _DBProvider.GetPayloadData(docid);
result.PayloadData = payloadData;
}
ulong key = 0;
if (payloadData == null)
{
throw new ParseException(string.Format("docid={0} does not exist",
docid));
}
foreach (Field field in _DistinctFields)
{
switch (field.DataType)
{
case DataType.TinyInt:
{
sbyte data = DataTypeConvert.GetSByte(field.DataType,
payloadData, field.TabIndex, field.SubTabIndex, field.DataLength);
key <<= 8;
key += (byte)data;
break;
}
case DataType.SmallInt:
{
short data = DataTypeConvert.GetShort(field.DataType,
payloadData, field.TabIndex, field.SubTabIndex, field.DataLength);
key <<= 16;
key += (ushort)data;
break;
}
case DataType.Int:
case DataType.Date:
case DataType.SmallDateTime:
{
int data = DataTypeConvert.GetInt(field.DataType,
payloadData, field.TabIndex, field.SubTabIndex, field.DataLength);
key <<= 32;
key += (uint)data;
break;
}
case DataType.BigInt:
case DataType.DateTime:
{
long data = DataTypeConvert.GetLong(field.DataType,
payloadData, field.TabIndex, field.SubTabIndex, field.DataLength);
key = (ulong)data;
break;
}
}
}
return(key);
}
unsafe private string GetInSql(Data.DBProvider dbProvider, Query.DocumentResultForSort[] result, int begin, int count)
{
if (begin + count > result.Length)
{
return(null);
}
StringBuilder sql = new StringBuilder();
if (dbProvider.DocIdReplaceField == null)
{
sql.Append("docId in (");
}
else
{
sql.AppendFormat("{0} in (", dbProvider.DocIdReplaceField);
}
Dictionary <long, int> replaceFieldValueToDocId = null;
if (dbProvider.DocIdReplaceField != null)
{
replaceFieldValueToDocId = new Dictionary <long, int>();
}
int i = 0;
for (int j = begin; j < begin + count; j++)
{
Query.DocumentResultForSort docResult = result[j];
int docId = docResult.DocId;
if (dbProvider.DocIdReplaceField == null)
{
if (i++ == 0)
{
sql.AppendFormat("{0}", docId);
}
else
{
sql.AppendFormat(",{0}", docId);
}
}
else
{
long replaceFieldValue = dbProvider.GetDocIdReplaceFieldValue(docId);
if (i++ == 0)
{
sql.AppendFormat("{0}", replaceFieldValue);
}
else
{
sql.AppendFormat(",{0}", replaceFieldValue);
}
}
}
sql.Append(")");
return(sql.ToString());
}
//Partition for QueryResultSort
private int PartitionDocumentResult(Query.DocumentResultForSort[] array, int low, int high, int pivotIndex)
{
if (_Asc)
{
Query.DocumentResultForSort pivotValue = array[pivotIndex];
array[pivotIndex] = array[low];
array[low] = pivotValue;
while (low < high)
{
while (array[high].SortValue >= pivotValue.SortValue && high > low)
{
--high;
}
if (high > low)
{
array[low] = array[high];
}
while (array[low].SortValue <= pivotValue.SortValue && high > low)
{
++low;
}
if (high > low)
{
array[high] = array[low];
}
}
array[low] = pivotValue;
return(low);
}
else
{
Query.DocumentResultForSort pivotValue = array[pivotIndex];
array[pivotIndex] = array[low];
array[low] = pivotValue;
while (low < high)
{
while (array[high].SortValue <= pivotValue.SortValue && high > low)
{
--high;
}
if (high > low)
{
array[low] = array[high];
}
while (array[low].SortValue >= pivotValue.SortValue && high > low)
{
++low;
}
if (high > low)
{
array[high] = array[low];
}
}
array[low] = pivotValue;
return(low);
}
}
