public void EndUpdate(ServerProcess process, Schema.TableVar tableVar)
{
SimpleDeviceHeader header = _headers[tableVar];
if (header.UpdateCount > 0)
{
header.UpdateCount--;
if (header.UpdateCount == 0)
{
SaveTable(process, tableVar);
}
}
}
public void TruncateTable(ServerProcess process, Schema.TableVar tableVar)
{
string tableVarFileName = GetTableVarFileName(tableVar);
if (File.Exists(tableVarFileName))
{
File.Delete(tableVarFileName);
}
Tables[tableVar].Truncate(process.ValueManager);
SimpleDeviceHeader header = _headers[tableVar];
header.TimeStamp += 1;
header.SaveTimeStamp = header.TimeStamp;
}
protected override object InternalExecute(Program program, PlanNode planNode)
{
if ((planNode is BaseTableVarNode) || (planNode is OrderNode))
{
Schema.TableVar tableVar = null;
if (planNode is BaseTableVarNode)
{
tableVar = ((BaseTableVarNode)planNode).TableVar;
}
else if (planNode is OrderNode)
{
tableVar = ((BaseTableVarNode)planNode.Nodes[0]).TableVar;
}
if (tableVar != null)
{
Device.LoadTable(ServerProcess, tableVar);
}
}
object result = base.InternalExecute(program, planNode);
if (planNode is CreateTableNode)
{
Schema.TableVar tableVar = ((CreateTableNode)planNode).Table;
SimpleDeviceHeader header = new SimpleDeviceHeader(tableVar, 0);
Device.Headers.Add(header);
if (!ServerProcess.IsLoading() && ((Device.ReconcileMode & ReconcileMode.Command) != 0))
{
string fileName = Device.GetTableVarFileName(tableVar);
if (File.Exists(fileName))
{
File.Delete(fileName);
}
}
}
else if (planNode is DropTableNode)
{
Device.Headers.Remove(((DropTableNode)planNode).Table);
}
return(result);
}
public void BeginUpdate(ServerProcess process, Schema.TableVar tableVar)
{
SimpleDeviceHeader header = _headers[tableVar];
header.UpdateCount++;
}
public void SaveTable(ServerProcess process, Schema.TableVar tableVar)
{
SimpleDeviceHeader header = _headers[tableVar];
if ((header.UpdateCount == 0) && (header.TimeStamp > header.SaveTimeStamp))
{
Plan plan = new Plan(process);
try
{
plan.PushSecurityContext(new SecurityContext(tableVar.Owner));
try
{
plan.PushGlobalContext();
try
{
Program program = new Program(process);
program.Code = Compiler.Compile(plan, new IdentifierExpression(tableVar.Name), true).ExtractNode <BaseTableVarNode>();
program.Start(null);
try
{
ITable table = (ITable)program.Code.Execute(program);
try
{
table.Open();
Row row = new Row(program.ValueManager, tableVar.DataType.CreateRowType());
try
{
string fileName = GetTableVarFileName(tableVar);
FileUtility.EnsureWriteable(fileName);
using (FileStream stream = new FileStream(fileName, FileMode.Create, FileAccess.Write))
{
while (table.Next())
{
table.Select(row);
byte[] rowValue = row.AsPhysical;
StreamUtility.WriteInteger(stream, rowValue.Length);
stream.Write(rowValue, 0, rowValue.Length);
}
}
}
finally
{
row.Dispose();
}
}
finally
{
table.Dispose();
}
}
finally
{
program.Stop(null);
}
}
finally
{
plan.PopGlobalContext();
}
}
finally
{
plan.PopSecurityContext();
}
}
finally
{
plan.Dispose();
}
header.SaveTimeStamp = header.TimeStamp;
}
}
