public bool ExecuteReader(string sql, CommandBehavior behavior, ref MySqlDataReader returnValue)
{
if (insideInterceptor) return false;
insideInterceptor = true;
bool handled = false;
foreach (BaseCommandInterceptor bci in interceptors)
handled |= bci.ExecuteReader(sql, behavior, ref returnValue);
insideInterceptor = false;
return handled;
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
public new MySqlDataReader ExecuteReader(CommandBehavior behavior)
{
#if !NETSTANDARD1_6
// give our interceptors a shot at it first
MySqlDataReader interceptedReader = null;
if ( connection != null &&
connection.commandInterceptor != null &&
connection.commandInterceptor.ExecuteReader(CommandText, behavior, ref interceptedReader))
return interceptedReader;
#endif
// interceptors didn't handle this so we fall through
bool success = false;
CheckState();
Driver driver = connection.driver;
cmdText = cmdText.Trim();
if (String.IsNullOrEmpty(cmdText))
Throw(new InvalidOperationException(Resources.CommandTextNotInitialized));
string sql = cmdText.Trim(';');
#if SUPPORT_REPLICATION
// Load balancing getting a new connection
if (connection.hasBeenOpen && !driver.HasStatus(ServerStatusFlags.InTransaction))
{
ReplicationManager.GetNewConnection(connection.Settings.Server, !IsReadOnlyCommand(sql), connection);
}
#endif
lock (driver)
{
//We have to recheck that there is no reader, after we got the lock
//if (connection.Reader != null)
// {
// Throw(new MySqlException(Resources.DataReaderOpen));
// }
#if !NETSTANDARD1_6
System.Transactions.Transaction curTrans = System.Transactions.Transaction.Current;
if (curTrans != null)
{
bool inRollback = false;
if (driver.CurrentTransaction != null)
inRollback = driver.CurrentTransaction.InRollback;
if (!inRollback)
{
System.Transactions.TransactionStatus status = System.Transactions.TransactionStatus.InDoubt;
try
{
// in some cases (during state transitions) this throws
// an exception. Ignore exceptions, we're only interested
// whether transaction was aborted or not.
status = curTrans.TransactionInformation.Status;
}
catch (System.Transactions.TransactionException)
{
}
if (status == System.Transactions.TransactionStatus.Aborted)
Throw(new System.Transactions.TransactionAbortedException());
}
}
#endif
commandTimer = new CommandTimer(connection, CommandTimeout);
lastInsertedId = -1;
if (CommandType == CommandType.TableDirect)
sql = "SELECT * FROM " + sql;
else if (CommandType == CommandType.Text)
{
// validates single word statetment (maybe is a stored procedure call)
if (sql.IndexOf(" ") == -1)
{
if (AddCallStatement(sql))
sql = "call " + sql;
}
}
// if we are on a replicated connection, we are only allow readonly statements
if (connection.Settings.Replication && !InternallyCreated)
EnsureCommandIsReadOnly(sql);
if (statement == null || !statement.IsPrepared)
{
if (CommandType == CommandType.StoredProcedure)
statement = new StoredProcedure(this, sql);
else
statement = new PreparableStatement(this, sql);
}
// stored procs are the only statement type that need do anything during resolve
statement.Resolve(false);
// Now that we have completed our resolve step, we can handle our
// command behaviors
HandleCommandBehaviors(behavior);
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
connection.Reader.Add(reader);
canceled = false;
// execute the statement
statement.Execute();
// wait for data to return
reader.NextResult();
success = true;
return reader;
}
catch (TimeoutException tex)
{
connection.HandleTimeoutOrThreadAbort(tex);
throw; //unreached
}
catch (ThreadAbortException taex)
{
connection.HandleTimeoutOrThreadAbort(taex);
throw;
}
catch (IOException ioex)
{
connection.Abort(); // Closes connection without returning it to the pool
throw new MySqlException(Resources.FatalErrorDuringExecute, ioex);
}
catch (MySqlException ex)
{
if (ex.InnerException is TimeoutException)
throw; // already handled
try
{
ResetReader();
ResetSqlSelectLimit();
}
catch (Exception)
{
// Reset SqlLimit did not work, connection is hosed.
Connection.Abort();
throw new MySqlException(ex.Message, true, ex);
}
// if we caught an exception because of a cancel, then just return null
if (ex.IsQueryAborted)
return null;
if (ex.IsFatal)
Connection.Close();
if (ex.Number == 0)
throw new MySqlException(Resources.FatalErrorDuringExecute, ex);
throw;
}
finally
{
if (connection != null)
{
if (connection.Reader == null)
{
// Something went seriously wrong, and reader would not
// be able to clear timeout on closing.
// So we clear timeout here.
ClearCommandTimer();
}
if (!success)
{
// ExecuteReader failed.Close Reader and set to null to
// prevent subsequent errors with DataReaderOpen
ResetReader();
}
}
}
}
}
internal void Close(MySqlDataReader reader)
{
if (statement != null)
statement.Close(reader);
ResetSqlSelectLimit();
if (statement != null && connection != null && connection.driver != null)
connection.driver.CloseQuery(connection, statement.StatementId);
ClearCommandTimer();
}
public virtual void Close(MySqlDataReader reader)
{
}
private static string GetString(MySqlDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return reader.GetString(index);
}
public override void Close(MySqlDataReader reader)
{
base.Close(reader);
if (String.IsNullOrEmpty(outSelect)) return;
if ((reader.CommandBehavior & CommandBehavior.SchemaOnly) != 0) return;
MySqlCommand cmd = new MySqlCommand(outSelect, command.Connection);
using (MySqlDataReader rdr = cmd.ExecuteReader(reader.CommandBehavior))
{
ProcessOutputParameters(rdr);
}
}
private void AdjustOutputTypes(MySqlDataReader reader)
{
// since MySQL likes to return user variables as strings
// we reset the types of the readers internal value objects
// this will allow those value objects to parse the string based
// return values
for (int i = 0; i < reader.FieldCount; i++)
{
string fieldName = reader.GetName(i);
if (fieldName.IndexOf(StoredProcedure.ParameterPrefix) != -1)
fieldName = fieldName.Remove(0, StoredProcedure.ParameterPrefix.Length + 1);
MySqlParameter parameter = command.Parameters.GetParameterFlexible(fieldName, true);
IMySqlValue v = MySqlField.GetIMySqlValue(parameter.MySqlDbType);
if (v is MySqlBit)
{
MySqlBit bit = (MySqlBit)v;
bit.ReadAsString = true;
reader.ResultSet.SetValueObject(i, bit);
}
else
reader.ResultSet.SetValueObject(i, v);
}
}
internal void ProcessOutputParameters(MySqlDataReader reader)
{
// We apparently need to always adjust our output types since the server
// provided data types are not always right
AdjustOutputTypes(reader);
if ((reader.CommandBehavior & CommandBehavior.SchemaOnly) != 0)
return;
// now read the output parameters data row
reader.Read();
string prefix = "@" + StoredProcedure.ParameterPrefix;
for (int i = 0; i < reader.FieldCount; i++)
{
string fieldName = reader.GetName(i);
if (fieldName.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
fieldName = fieldName.Remove(0, prefix.Length);
MySqlParameter parameter = command.Parameters.GetParameterFlexible(fieldName, true);
parameter.Value = reader.GetValue(i);
}
}
public virtual bool ExecuteReader(string sql, CommandBehavior behavior, ref MySqlDataReader returnValue)
{
return false;
}
