//struct MetaPageFrequency
//{
// public int Offset;
// public double Frequency;
//}
/// <summary>
/// Saves the database schema
/// </summary>
/// <param name="writer">binary writer</param>
public void Save(io.BinaryWriter writer)
{
//flags
writer.Write((UInt32)Flags);
//
Version.BinarySave(writer);
Description.BinarySave(writer);
Name.BinarySave(writer);
//page size
writer.Write(PageSize);
//tables
int pageCount = _tables.Count; // Tables.Count;
writer.Write(pageCount);
//frequency
//var frequencyList = new List<KeyValuePair<string, List<MetaPageFrequency>>>();
foreach (var table in _tables.Select(t => t.Value)) // Tables
{
table.Name.BinarySave(writer);
table.FileName.BinarySave(writer);
writer.Write(table.Generate);
writer.Write(table.Multikey);
//
writer.Write(table.Rows);
writer.Write(table.RowMask);
writer.Write(table.RowMaskLength);
//pager
table.Pager.Store(writer);
//columns
writer.Write(table.Count);
foreach (var column in table.Columns)
{
column.Indexer.BinarySave(writer);
writer.Write(column.Unique);
column.Name.BinarySave(writer);
writer.Write(column.Index);
column.Type.BinarySave(writer);
writer.Write(column.Key);
writer.Write(column.Indexed);
//
writer.Write(column.NodePages);
writer.Write(column.ItemPages);
//frequency
//var hash = $"{table.Name}.{column.Name}";
//var freq = new KeyValuePair<string, List<MetaPageFrequency>>(hash, new List<MetaPageFrequency>());
//frequencyList.Add(freq);
}
}
//save frequency data to disk
}