// Adds //
/// <summary>
/// Adds a column to the schema; will throw an exception if a column name passed already exists in the schema
/// </summary>
/// <param name="Alias">The column name</param>
/// <param name="Affinity">The column affinity</param>
/// <param name="Nullable">A boolean, true means the column can be nulls, false means the column cannot be null</param>
/// <param name="PageSize">The size in bytes; this will be ignored if the affinity is not variable (not string or blob)</param>
public void Add(string Name, CellAffinity Affinity, int Size, bool Nullable)
{
// Check the name size //
if (Name.Length > MAX_COLUMN_NAME_LEN)
{
Name = Name.Substring(0, MAX_COLUMN_NAME_LEN);
}
// Check the size //
if (CellAffinityHelper.IsVariableLength(Affinity) && Size == 0)
{
throw new Exception("Variable length types must have a size greater than zero");
}
// Check if exists //
if (this.Contains(Name))
{
throw new Exception("Column already exists: " + Name);
}
// Check for capacity //
if (this.Count >= MAX_COLUMNS)
{
throw new Exception("Schema cannot accept any more columns");
}
// Get the size //
int v = CellSerializer.FixLength(Affinity, Size);
// Build record //
Record r = Record.Stitch(new Cell(Name), new Cell((byte)Affinity), new Cell(Nullable), new Cell(v));
// Accumulate record //
this._Cache.Allocate(Name, r);
// Hash code //
this._HashCode += r.GetHashCode(new Key(1, 2)) * this.Count;
}
public int GetHashCode(Record A)
{
return(A.GetHashCode(this._RightKey));
}