public IDbQueryable <T> Between <T, TKey>(IDbQueryable <T> source, Expression <Func <T, TKey> > keySelector, double from, double to, BetweenBoundariesInternal boundaries = BetweenBoundariesInternal.BothInclusive)
{
CheckTableInfo <T>();
if (source.LDBTree == null)
{
source.LDBTree = new QueryTree();
}
var tree = source.LDBTree;
if (tree.BetweenInfo == null)
{
tree.BetweenInfo = new List <BetweenInfo>();
}
var info = new BetweenInfo();
tree.BetweenInfo.Add(info);
info.BetweenBoundaries = boundaries;
info.From = from;
info.To = to;
var par = keySelector.Parameters.First();
var 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];
info.ColumnName = name;
info.TableName = table_info.Name;
info.IdNumber = table_info.ColumnNumbers["Id"];
source.LDBTree.Prev = info;
source.LDBTree.Prev.Id = source.LDBTree.Counter + 1;
source.LDBTree.Counter++;
return(source);
}
public List <int> FindOneBetween(BetweenInfo bet, Dictionary <long, byte[]> cache, ReadOptions ro)
{
var result = new List <int>();
var skey = MakeSnapshotKey(bet.TableNumber, bet.ColumnNumber);
var snapid = leveld_db.Get(skey, null, ro);
string snapshot_id = null;
string id_snapshot_id = null;
if (snapid != null)
{
snapshot_id = Encoding.UTF8.GetString(snapid);
skey = MakeSnapshotKey(bet.TableNumber, bet.IdNumber);
snapid = leveld_db.Get(skey, null, ro);
id_snapshot_id = Encoding.UTF8.GetString(snapid);
if (indexes.ContainsKey(bet.TableName + "|" + bet.ColumnName + "|" + snapshot_id))
{
var op = new Oper()
{
ColumnNumber = bet.ColumnNumber,
ColumnType = bet.ColumnType,
TableNumber = bet.TableNumber,
ColumnName = bet.ColumnName,
TableName = bet.TableName
};
var val = EncodeValue(op.ColumnType, bet.From);
var index_res = GreaterThanOperatorWithIndex(op, val, bet.BetweenBoundaries == BetweenBoundariesInternal.BothInclusive || bet.BetweenBoundaries == BetweenBoundariesInternal.FromInclusiveToExclusive, ro, snapshot_id, id_snapshot_id, bet.To, bet.BetweenBoundaries == BetweenBoundariesInternal.BothInclusive || bet.BetweenBoundaries == BetweenBoundariesInternal.FromExclusiveToInclusive);
return(index_res);
}
}
if (bet.From >= 0 && bet.To >= 0)
{
var op = new Oper()
{
ColumnNumber = bet.ColumnNumber,
ColumnType = bet.ColumnType,
TableNumber = bet.TableNumber,
ColumnName = bet.ColumnName,
TableName = bet.TableName
};
var val = EncodeValue(op.ColumnType, bet.From);
var result_tmp = GreaterThanOperator(op, val, bet.BetweenBoundaries == BetweenBoundariesInternal.BothInclusive || bet.BetweenBoundaries == BetweenBoundariesInternal.FromInclusiveToExclusive, cache, ro, snapshot_id, id_snapshot_id,
bet.To, bet.BetweenBoundaries == BetweenBoundariesInternal.BothInclusive || bet.BetweenBoundaries == BetweenBoundariesInternal.FromExclusiveToInclusive);
result = result_tmp;
}
else if (bet.From < 0 && bet.To < 0)
{
var op = new Oper()
{
ColumnNumber = (short)(-1 * bet.ColumnNumber),
ColumnType = bet.ColumnType,
TableNumber = bet.TableNumber,
TableName = bet.TableName,
ColumnName = bet.ColumnName
};
var val = EncodeValue(op.ColumnType, bet.To);
if (val.Type == LinqDbTypes.double_)
{
val.DoubleVal *= -1;
}
else if (val.Type == LinqDbTypes.int_)
{
val.IntVal *= -1;
}
var result_tmp = GreaterThanOperator(op, val, bet.BetweenBoundaries == BetweenBoundariesInternal.BothInclusive || bet.BetweenBoundaries == BetweenBoundariesInternal.FromExclusiveToInclusive, cache, ro, snapshot_id, id_snapshot_id,
-1 * bet.From, bet.BetweenBoundaries == BetweenBoundariesInternal.BothInclusive || bet.BetweenBoundaries == BetweenBoundariesInternal.FromInclusiveToExclusive);
result = result_tmp;
}
else
{
var op = new Oper()
{
ColumnNumber = (short)(-1 * bet.ColumnNumber),
ColumnType = bet.ColumnType,
TableNumber = bet.TableNumber,
TableName = bet.TableName,
ColumnName = bet.ColumnName
};
var val = EncodeValue(op.ColumnType, 0);
var result_tmp = GreaterThanOperator(op, val, true, cache, ro, snapshot_id, id_snapshot_id,
-1 * bet.From, bet.BetweenBoundaries == BetweenBoundariesInternal.BothInclusive || bet.BetweenBoundaries == BetweenBoundariesInternal.FromInclusiveToExclusive);
result = result_tmp;
op = new Oper()
{
ColumnNumber = bet.ColumnNumber,
ColumnType = bet.ColumnType,
TableNumber = bet.TableNumber,
TableName = bet.TableName,
ColumnName = bet.ColumnName
};
val = EncodeValue(op.ColumnType, 0);
var result_pos = GreaterThanOperator(op, val, false, cache, ro, snapshot_id, id_snapshot_id,
bet.To, bet.BetweenBoundaries == BetweenBoundariesInternal.BothInclusive || bet.BetweenBoundaries == BetweenBoundariesInternal.FromExclusiveToInclusive);
result = result.MyUnion(result_pos);
}
return(result);
}
