public void AddPreAllocatedBuffers(NewPageAllocator tablePageAllocator, bool includeDetails)
{
if (PreAllocatedBuffers != null)
{
throw new InvalidOperationException("Pre allocated buffers already defined");
}
PreAllocatedBuffers = StorageReportGenerator.GetReport(tablePageAllocator, includeDetails);
AllocatedSpaceInBytes += PreAllocatedBuffers.AllocatedSpaceInBytes;
if (includeDetails)
{
var allocationTree = PreAllocatedBuffers.AllocationTree;
UsedSizeInBytes += (long)(allocationTree.AllocatedSpaceInBytes * allocationTree.Density);
}
}
/// <summary>
/// A table is stored inside a tree, and has the following keys in it
///
/// - active-section -> page number - the page number of the current active small data section
/// - inactive-sections -> fixed size tree with no content where the keys are the page numbers of inactive small raw data sections
/// - large-values -> fixed size tree with no content where the keys are the page numbers of the large values
/// - for each index:
/// - If can fit into fixed size tree, use that.
/// - Otherwise, create a tree (whose key would be the indexed field value and the value would
/// be a fixed size tree of the ids of all the matching values)
/// - stats -> header information about the table (number of entries, etc)
/// - schemas -> schema definition for the table
///
/// </summary>
public void Create(Transaction tx, Slice name, ushort?sizeInPages)
{
if (_primaryKey == null && _indexes.Count == 0 && _fixedSizeIndexes.Count == 0)
{
throw new InvalidOperationException($"Cannot create table {name} without a primary key and no indexes");
}
var tableTree = tx.CreateTree(name, RootObjectType.Table);
if (tableTree.State.NumberOfEntries > 0)
{
return; // this was already created
}
// Create raw data. This is where we will actually store the documents
using (var rawDataActiveSection = ActiveRawDataSmallSection.Create(tx.LowLevelTransaction, name, TableType, sizeInPages))
{
long val = rawDataActiveSection.PageNumber;
Slice pageNumber;
using (
Slice.External(tx.Allocator, (byte *)&val, sizeof(long), ByteStringType.Immutable, out pageNumber))
{
tableTree.Add(ActiveSectionSlice, pageNumber);
}
byte *ptr;
using (tableTree.DirectAdd(StatsSlice, sizeof(TableSchemaStats), out ptr))
{
var stats = (TableSchemaStats *)ptr;
stats->NumberOfEntries = 0;
}
var tablePageAllocator = new NewPageAllocator(tx.LowLevelTransaction, tableTree);
tablePageAllocator.Create();
var globalPageAllocator = new NewPageAllocator(tx.LowLevelTransaction,
tx.LowLevelTransaction.RootObjects);
globalPageAllocator.Create();
if (_primaryKey != null)
{
if (_primaryKey.IsGlobal == false)
{
using (var indexTree = Tree.Create(tx.LowLevelTransaction, tx, _primaryKey.Name, isIndexTree: true, newPageAllocator: tablePageAllocator))
{
using (tableTree.DirectAdd(_primaryKey.Name, sizeof(TreeRootHeader), out ptr))
{
indexTree.State.CopyTo((TreeRootHeader *)ptr);
}
}
}
else
{
tx.CreateTree(_primaryKey.Name.ToString(), isIndexTree: true, newPageAllocator: globalPageAllocator);
}
}
foreach (var indexDef in _indexes.Values)
{
if (indexDef.IsGlobal == false)
{
using (var indexTree = Tree.Create(tx.LowLevelTransaction, tx, indexDef.Name, isIndexTree: true, newPageAllocator: tablePageAllocator))
{
using (tableTree.DirectAdd(indexDef.Name, sizeof(TreeRootHeader), out ptr))
{
indexTree.State.CopyTo((TreeRootHeader *)ptr);
}
}
}
else
{
tx.CreateTree(indexDef.Name.ToString(), isIndexTree: true, newPageAllocator: globalPageAllocator);
}
}
// Serialize the schema into the table's tree
var serializer = SerializeSchema();
using (tableTree.DirectAdd(SchemasSlice, serializer.Length, out ptr))
{
fixed(byte *source = serializer)
{
Memory.Copy(ptr, source, serializer.Length);
}
}
}
}