public void UpdateBuffer(BufferWriter writer)
{
writer.Write(this.Slot);
writer.Write(this.IndexType);
writer.WriteCString(this.Name);
writer.WriteCString(this.Expression);
writer.Write(this.Unique);
writer.Write(this.Head);
writer.Write(this.Tail);
writer.Write(this.MaxLevel);
writer.Write(this.FreeIndexPageList);
}
public override PageBuffer UpdateBuffer()
{
// if page was deleted, do not write in content area (must keep with 0 only)
if (this.PageType == PageType.Empty)
{
return(base.UpdateBuffer());
}
var area = _buffer.Slice(PAGE_HEADER_SIZE, PAGE_SIZE - PAGE_HEADER_SIZE);
using (var w = new BufferWriter(area))
{
// read position for FreeDataPage and FreeIndexPage
for (var i = 0; i < PAGE_FREE_LIST_SLOTS; i++)
{
w.Write(this.FreeDataPageID[i]);
w.Write(this.FreeIndexPageID[i]);
}
// write creation/last analyzed (16 bytes)
w.Write(this.CreationTime);
w.Write(this.LastAnalyzed);
// update collection only if needed
if (_isIndexesChanged)
{
// skip reserved area (indexes starts at position 96)
w.Skip(P_INDEXES - w.Position);
w.Write((byte)_indexes.Count); // 1 byte
foreach (var index in _indexes.Values)
{
w.Write(index.Slot);
w.WriteCString(index.Name);
w.WriteCString(index.Expression);
w.Write(index.Unique);
w.Write(index.Head);
w.Write(index.Tail);
w.Write(index.MaxLevel);
w.Write(index.KeyCount);
w.Write(index.UniqueKeyCount);
}
_isIndexesChanged = false;
}
}
return(base.UpdateBuffer());
}