public IdCopy(IdSet x, EvalEnv ee)
{
foreach (long id in x.All(ee))
{
Copy.Add(id);
}
}
public void ExecDelete(Exp where, bool[] used, EvalEnv ee)
{
Value [] tr = new Value[Cols.Count];
ee.Row = tr;
IdSet IdSet = where == null ? null : where.GetIdSet(this, ee);
if (IdSet == null)
{
IdSet = new UpTo(RowCount);
}
else
{
IdSet = new IdCopy(IdSet, ee); // Need to take a copy of the id values, as indexes may be updated.
}
foreach (long id in IdSet.All(ee))
{
if (Get(id, tr, null))
{
if (where == null || (where.Eval(ee).B))
{
Delete(id, tr);
}
}
}
}
public override G.IEnumerable <long> All(EvalEnv ee)
{
G.SortedSet <long> copy = new G.SortedSet <long>();
foreach (long id in X.All(ee))
{
copy.Add(id);
}
foreach (long id in copy)
{
yield return(id);
}
}
public void ExecUpdate(Assign[] a, Exp where, bool [] used, int idCol, EvalEnv ee)
{
Value [] tr = new Value[Cols.Count];
Value [] nr = new Value[Cols.Count]; // The new row.
ee.Row = tr;
IdSet IdSet = where == null ? null : where.GetIdSet(this, ee);
if (IdSet == null)
{
IdSet = new UpTo(RowCount);
}
else
{
IdSet = new IdCopy(IdSet, ee); // Need to take a copy of the id values if an index is used.
}
foreach (long id in IdSet.All(ee))
{
if (Get(id, tr, null))
{
for (int i = 0; i < nr.Length; i += 1)
{
nr[i] = tr[i];
}
if (where == null || (where.Eval(ee).B))
{
for (int i = 0; i < a.Length; i += 1)
{
int ix = a[i].Lhs.ColIx;
nr[ix] = a[i].Rhs.Eval(ee);
}
if (idCol >= 0 && nr[idCol].L != id)
{
Delete(id, tr);
Insert(nr, idCol);
}
else
{
Update(id, tr, nr);
}
}
}
}
}
