/// <summary>
/// Creates an external index, but does not load it
/// </summary>
/// <param name="Parent"></param>
/// <param name="IndexColumns"></param>
/// <returns></returns>
public static TreeIndex CreateExternalIndex(Table Parent, Key IndexColumns)
{
Schema columns = BinaryRecordTree.NonClusteredIndexColumns(Parent.Columns, IndexColumns);
ShellTable storage = new ShellTable(Parent.Host, Host.RandomName, Parent.Host.TempDB, columns, Page.DEFAULT_SIZE);
return(new TreeIndex(storage, Parent, Host.RandomName, IndexColumns));
}
/// <summary>
/// This method should be used for creating a brand new table object
/// </summary>
/// <param name="Host"></param>
/// <param name="Alias"></param>
/// <param name="Dir"></param>
/// <param name="Columns"></param>
/// <param name="PageSize"></param>
/// <param name="ClusterKey"></param>
public TreeTable(Host Host, string Path, Schema Columns, Key ClusterColumns, BinaryRecordTree.TreeAffinity State, int PageSize)
: base(Host, Path, Columns, PageSize)
{
this._Cluster = BinaryRecordTree.CreateClusteredIndex(this, ClusterColumns, State);
this._TableType = "CLUSTER_SCRIBE";
this._Header.ClusterKey = ClusterColumns;
}
/// <summary>
/// Creates and builds a temporary index
/// </summary>
/// <param name="Parent"></param>
/// <param name="IndexColumns"></param>
/// <returns></returns>
public static TreeIndex BuildTemporaryIndex(Table Parent, Key IndexColumns)
{
Schema columns = BinaryRecordTree.NonClusteredIndexColumns(Parent.Columns, IndexColumns);
ShellTable storage = new ShellTable(Parent.Host, Host.RandomName, Parent.Host.TempDB, columns, Page.DEFAULT_SIZE);
TreeIndex idx = new TreeIndex(storage, Parent, Host.RandomName, IndexColumns);
idx.Calibrate();
Parent.Host.TableStore.PlaceInRecycleBin(storage.Key);
return(idx);
}
/// <summary>
/// Creates a new index
/// </summary>
/// <param name="Storage"></param>
/// <param name="Parent"></param>
/// <param name="IndexColumns"></param>
public TreeIndex(Table Storage, Table Parent, string Name, Key IndexColumns)
{
this._Header = new IndexHeader(Name, -1, -1, -1, 0, 0, IndexColumns);
this._Storage = Storage;
this._Parent = Parent;
this._IndexColumns = IndexColumns;
Schema s = BinaryRecordTree.NonClusteredIndexColumns(this._Parent.Columns, this._IndexColumns);
//this._Tree = new Cluster(this._Storage, s, Key.Build(this._IndexColumns.Count), null, this._Header, ClusterState.Universal);
this._Tree = new BinaryRecordTree(Storage, Key.Build(this._IndexColumns.Count), s, null, Header, BinaryRecordTree.TreeAffinity.Unconstrained);
}
/// <summary>
/// Opens an existing index
/// </summary>
/// <param name="Storage"></param>
/// <param name="Parent"></param>
/// <param name="Header"></param>
public TreeIndex(Table Storage, Table Parent, IndexHeader Header)
{
this._Storage = Storage;
this._Parent = Parent;
this._Header = Header;
this._IndexColumns = Header.IndexColumns;
Page root = this._Storage.GetPage(Header.RootPageID);
Schema s = BinaryRecordTree.NonClusteredIndexColumns(this._Parent.Columns, Header.IndexColumns);
this._Tree = new BinaryRecordTree(Storage, Key.Build(this._IndexColumns.Count), s, root, Header, BinaryRecordTree.TreeAffinity.Unconstrained);
}
/// <summary>
/// This method should be used for creating a table object from an existing table on disk
/// </summary>
/// <param name="Host"></param>
/// <param name="Header"></param>
/// <param name="ClusterKey"></param>
public TreeTable(Host Host, TableHeader Header)
: base(Host, Header)
{
if (Header.RootPageID == -1)
{
throw new ArgumentException("The root page ID cannot be null");
}
// Get the sort key //
Key k = Header.ClusterKey;
// Get the root page ID //
Page root = this.GetPage(Header.RootPageID);
// Cluster //
BinaryRecordTree.TreeAffinity x = this._Header.ClusterKeyState;
this._Cluster = new BinaryRecordTree(this, k, this.Columns, root, this.Header, x);
this._TableType = "CLUSTER_SCRIBE";
}
