IDbQueryable <T> Intersect <T, TKey>(IDbQueryable <T> source, Expression <Func <T, TKey> > keySelector, List <EncodedValue> set, Dictionary <long, byte[]> cache)
{
if (source.LDBTree == null)
{
source.LDBTree = new QueryTree();
}
var tree = source.LDBTree;
if (tree.IntersectInfo == null)
{
tree.IntersectInfo = new List <IntersectInfo>();
}
var info = new IntersectInfo();
tree.IntersectInfo.Add(info);
info.Set = set;
string name = "Id";
if (keySelector != null)
{
var par = keySelector.Parameters.First();
name = SharedUtils.GetPropertyName(keySelector.Body.ToString());
}
var table_info = GetTableInfo(typeof(T).Name);
info.TableNumber = table_info.TableNumber;
info.ColumnNumber = table_info.ColumnNumbers[name];
info.ColumnType = table_info.Columns[name];
source.LDBTree.Prev = info;
source.LDBTree.Prev.Id = source.LDBTree.Counter + 1;
source.LDBTree.Counter++;
return(source);
}
public List <int> IntersectOne(IntersectInfo info, TableInfo table_info, Dictionary <long, byte[]> cache, ReadOptions ro)
{
var result = new List <int>();
//if (info.Set.Count() > 50)
//{
Oper odb = new Oper()
{
TableNumber = info.TableNumber,
ColumnType = info.ColumnType,
ColumnNumber = info.ColumnNumber,
ColumnName = table_info.ColumnNumbers.First(f => f.Value == info.ColumnNumber).Key,
TableName = table_info.Name
};
var skey = MakeSnapshotKey(table_info.TableNumber, table_info.ColumnNumbers[odb.ColumnName]);
var snapid = leveld_db.Get(skey, null, ro);
if (snapid != null)
{
var snapshot_id = Encoding.UTF8.GetString(snapid);
skey = MakeSnapshotKey(table_info.TableNumber, table_info.ColumnNumbers["Id"]);
snapid = leveld_db.Get(skey, null, ro);
string id_snapshot_id = Encoding.UTF8.GetString(snapid);
var index_res = IntersectWithIndex(odb, info.Set, ro, snapshot_id, id_snapshot_id);
if (index_res != null)
{
return(index_res);
}
}
foreach (var val in info.Set)
{
Oper odb2 = new Oper()
{
TableNumber = info.TableNumber,
ColumnType = info.ColumnType,
ColumnNumber = info.ColumnNumber,
ColumnName = table_info.ColumnNumbers.First(f => f.Value == info.ColumnNumber).Key,
TableName = table_info.Name
};
result.AddRange(EqualOperator(odb2, val, table_info, cache, ro, null, null));
}
return(result);
//}
//foreach (var val in info.Set)
//{
// Oper odb = new Oper()
// {
// TableNumber = info.TableNumber,
// ColumnType = info.ColumnType,
// ColumnNumber = info.ColumnNumber,
// ColumnName = table_info.ColumnNumbers.First(f => f.Value == info.ColumnNumber).Key,
// TableName = table_info.Name
// };
// result.AddRange(EqualOperator(odb, val, table_info, cache, ro, null, null));
//}
//return result;
}
