public override byte[] GetSlice(int sliceLength)
{
ClearStatusVector();
var dbHandle = _db.HandlePtr;
var trHandle = _transaction.HandlePtr;
var arrayDesc = ArrayDescMarshaler.MarshalManagedToNative(Descriptor);
var buffer = new byte[sliceLength];
_db.FbClient.isc_array_get_slice(
_statusVector,
ref dbHandle,
ref trHandle,
ref _handle,
arrayDesc,
buffer,
ref sliceLength);
ArrayDescMarshaler.CleanUpNativeData(ref arrayDesc);
_db.ProcessStatusVector(_statusVector);
return(buffer);
}
public override void BeginTransaction(TransactionParameterBuffer tpb)
{
if (State != TransactionState.NoTransaction)
{
throw new InvalidOperationException();
}
var teb = new IscTeb();
var tebData = IntPtr.Zero;
try
{
ClearStatusVector();
teb.dbb_ptr = Marshal.AllocHGlobal(4);
Marshal.WriteInt32(teb.dbb_ptr, _db.Handle);
teb.tpb_len = tpb.Length;
teb.tpb_ptr = Marshal.AllocHGlobal(tpb.Length);
Marshal.Copy(tpb.ToArray(), 0, teb.tpb_ptr, tpb.Length);
var size = Marshal.SizeOf <IscTeb>();
tebData = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(teb, tebData, true);
_db.FbClient.isc_start_multiple(
_statusVector,
ref _handle,
1,
tebData);
_db.ProcessStatusVector(_statusVector);
State = TransactionState.Active;
_db.TransactionCount++;
}
finally
{
if (teb.dbb_ptr != IntPtr.Zero)
{
Marshal.FreeHGlobal(teb.dbb_ptr);
}
if (teb.tpb_ptr != IntPtr.Zero)
{
Marshal.FreeHGlobal(teb.tpb_ptr);
}
if (tebData != IntPtr.Zero)
{
Marshal.DestroyStructure <IscTeb>(tebData);
Marshal.FreeHGlobal(tebData);
}
}
}
protected override void Create()
{
ClearStatusVector();
var dbHandle = _db.HandlePtr;
var trHandle = ((FesTransaction)_transaction).HandlePtr;
_db.FbClient.isc_create_blob2(
_statusVector,
ref dbHandle,
ref trHandle,
ref _blobHandle,
ref _blobId,
0,
new byte[0]);
_db.ProcessStatusVector(_statusVector);
RblAddValue(IscCodes.RBL_create);
}
public override void Prepare(string commandText)
{
ClearAll();
ClearStatusVector();
if (State == StatementState.Deallocated)
{
Allocate();
}
_fields = new Descriptor(1);
var sqlda = XsqldaMarshaler.MarshalManagedToNative(_db.Charset, _fields);
var trHandle = _transaction.HandlePtr;
var buffer = _db.Charset.GetBytes(commandText);
_db.FbClient.isc_dsql_prepare(
_statusVector,
ref trHandle,
ref _handle,
(short)buffer.Length,
buffer,
_db.Dialect,
sqlda);
var descriptor = XsqldaMarshaler.MarshalNativeToManaged(_db.Charset, sqlda);
XsqldaMarshaler.CleanUpNativeData(ref sqlda);
_db.ProcessStatusVector(_statusVector);
_fields = descriptor;
if (_fields.ActualCount > 0 && _fields.ActualCount != _fields.Count)
{
Describe();
}
else
{
if (_fields.ActualCount == 0)
{
_fields = new Descriptor(0);
}
}
_fields.ResetValues();
DescribeParameters();
StatementType = GetStatementType();
State = StatementState.Prepared;
}