void ReadHeader()
{
_leftToReadInDataMsg = _connector.ReadExpecting <CopyDataMessage>().Length;
var headerLen = NpgsqlRawCopyStream.BinarySignature.Length + 4 + 4;
_buf.Ensure(headerLen);
if (NpgsqlRawCopyStream.BinarySignature.Any(t => _buf.ReadByte() != t))
{
throw new NpgsqlException("Invalid COPY binary signature at beginning!");
}
var flags = _buf.ReadInt32();
if (flags != 0)
{
throw new NotSupportedException("Unsupported flags in COPY operation (OID inclusion?)");
}
_buf.ReadInt32(); // Header extensions, currently unused
_leftToReadInDataMsg -= headerLen;
}
internal NpgsqlNotificationEventArgs(NpgsqlReadBuffer buf)
{
PID = buf.ReadInt32();
Condition = buf.ReadNullTerminatedString();
AdditionalInformation = buf.ReadNullTerminatedString();
}