/// <summary>
/// Ctr.
/// </summary>
/// <param name="connection">Parent connection</param>
/// <param name="inputStream">Incoming data stream from server</param>
/// <param name="holders">Array of holder objects that must be disposed when reader is closed</param>
public PqlDataReader(PqlDataConnection connection, BufferedReaderStream inputStream, params IDisposable[] holders)
{
m_protocolUtility = new PqlProtocolUtility(connection, inputStream, holders);
try
{
m_reader = inputStream.MyReader;
m_scheme = m_protocolUtility.ReadResponseHeaders(inputStream);
if (m_scheme.Fields != null && m_scheme.Fields.Length > 0)
{
m_currentRow = new RowData(m_scheme.Fields.Select(x => x.DataType).ToArray());
m_state = ReaderState.New;
}
else
{
m_state = ReaderState.Closed;
}
connection.SwitchToFetchingState();
}
catch
{
m_protocolUtility.Dispose();
throw;
}
}
private int ExecuteNonQuery(StatementType statementType, string entityName, string[] fieldNames, int argCount, IEnumerable<RowData> requestBulk)
{
var channel = m_connection.BeginExecuteCommand(this);
try
{
var dataRequest = CreateRequest(false, false);
var dataRequestBulk = requestBulk == null ? null : CreateRequestBulk(statementType, entityName, fieldNames, argCount, requestBulk);
using (var response = SendCommand(channel, dataRequest, CreateRequestParams(), dataRequestBulk))
{
var streamHolder = PqlDataConnection.ReaderStreams.Take(m_connection.CancellationTokenSource.Token);
try
{
streamHolder.Item.Attach(response.Stream);
using (var reader = new PqlProtocolUtility(m_connection, streamHolder.Item, streamHolder))
{
// this will throw if any server exceptions are reported
return reader.ReadResponse().RecordsAffected;
}
}
catch
{
streamHolder.Dispose();
throw;
}
}
}
catch
{
m_connection.ConfirmExecutionCompletion(false);
throw;
}
}
/// <summary>
/// Creates a prepared (or compiled) version of the command on the data source.
/// </summary>
/// <exception cref="T:System.InvalidOperationException">The <see cref="P:System.Data.OleDb.OleDbCommand.Connection"/> is not set.
/// -or- The <see cref="P:System.Data.OleDb.OleDbCommand.Connection"/> is not <see cref="M:System.Data.OleDb.OleDbConnection.Open"/>. </exception>
/// <filterpriority>2</filterpriority>
public override void Prepare()
{
var channel = m_connection.BeginExecuteCommand(this);
try
{
var dataRequest = CreateRequest(true, false);
using (var response = SendCommand(channel, dataRequest, CreateRequestParams(), null))
{
var streamHolder = PqlDataConnection.ReaderStreams.Take(m_connection.CancellationTokenSource.Token);
try
{
streamHolder.Item.Attach(response.Stream);
using (var reader = new PqlProtocolUtility(m_connection, streamHolder.Item, streamHolder))
{
// this will throw if any server exceptions are reported
reader.ReadResponse();
}
}
catch
{
streamHolder.Dispose();
throw;
}
}
}
catch
{
m_connection.ConfirmExecutionCompletion(false);
throw;
}
}