/// <include file='docs/mysqlcommand.xml' path='docs/Prepare2/*'/>
private void Prepare(int cursorPageSize)
{
if (!connection.driver.Version.isAtLeast(5, 0, 0) && cursorPageSize > 0)
{
throw new InvalidOperationException("Nested commands are only supported on MySQL 5.0 and later");
}
// if the length of the command text is zero, then just return
string psSQL = CommandText;
if (psSQL == null ||
psSQL.Trim().Length == 0)
{
return;
}
if (CommandType == CommandType.StoredProcedure)
{
statement = new StoredProcedure(this, CommandText);
}
else
{
statement = new PreparableStatement(this, CommandText);
}
statement.Prepare();
}
/// <include file='docs/mysqlcommand.xml' path='docs/Prepare2/*'/>
private void Prepare(int cursorPageSize)
{
using (new CommandTimer(Connection, CommandTimeout))
{
// if the length of the command text is zero, then just return
string psSQL = CommandText;
if (psSQL == null ||
psSQL.Trim().Length == 0)
{
return;
}
if (CommandType == CommandType.StoredProcedure)
{
statement = new StoredProcedure(this, CommandText);
}
else
{
statement = new PreparableStatement(this, CommandText);
}
statement.Resolve(true);
statement.Prepare();
}
}
/*
* Because the user should not be able to directly create a
* DataReader object, the constructors are
* marked as internal.
*/
internal MySqlDataReader(MySqlCommand cmd, PreparableStatement statement, CommandBehavior behavior)
{
this.command = cmd;
connection = (MySqlConnection)command.Connection;
commandBehavior = behavior;
driver = connection.driver;
affectedRows = -1;
this.statement = statement;
}
/*
* Because the user should not be able to directly create a
* DataReader object, the constructors are
* marked as internal.
*/
internal MySqlDataReader(MySqlCommand cmd, PreparableStatement statement, CommandBehavior behavior)
{
command = cmd;
connection = command.Connection;
commandBehavior = behavior;
driver = connection.driver;
affectedRows = -1;
this.statement = statement;
nextResultDone = false;
}
/*
* Because the user should not be able to directly create a
* DataReader object, the constructors are
* marked as internal.
*/
internal MySqlDataReader(MySqlCommand cmd, PreparableStatement statement, CommandBehavior behavior)
{
this.command = cmd;
connection = (MySqlConnection)command.Connection;
commandBehavior = behavior;
driver = connection.driver;
affectedRows = -1;
this.statement = statement;
nextResultDone = false;
fieldHashCS = new Hashtable();
fieldHashCI = new Hashtable(StringComparer.InvariantCultureIgnoreCase);
}
/*
* Because the user should not be able to directly create a
* DataReader object, the constructors are
* marked as internal.
*/
internal MySqlDataReader(MySqlCommand cmd, PreparableStatement statement, CommandBehavior behavior)
{
this.command = cmd;
connection = (MySqlConnection)command.Connection;
commandBehavior = behavior;
driver = connection.driver;
affectedRows = -1;
this.statement = statement;
nextResultDone = false;
fieldHashCS = new Hashtable();
fieldHashCI = new Hashtable(StringComparer.InvariantCultureIgnoreCase);
}
internal MySqlDataReader(MySqlCommand cmd, PreparableStatement statement, CommandBehavior behavior)
{
this.command = cmd;
this.connection = this.command.Connection;
this.commandBehavior = behavior;
this.driver = this.connection.driver;
this.affectedRows = -1L;
this.statement = statement;
if (cmd.CommandType == CommandType.StoredProcedure && cmd.UpdatedRowSource == UpdateRowSource.FirstReturnedRecord)
{
this.disableZeroAffectedRows = true;
}
}
/*
* Because the user should not be able to directly create a
* DataReader object, the constructors are
* marked as internal.
*/
internal MySqlDataReader(MySqlCommand cmd, PreparableStatement statement, CommandBehavior behavior)
{
this.command = cmd;
connection = (MySqlConnection)command.Connection;
commandBehavior = behavior;
driver = connection.driver;
affectedRows = -1;
this.statement = statement;
if (cmd.CommandType == CommandType.StoredProcedure &&
cmd.UpdatedRowSource == UpdateRowSource.FirstReturnedRecord)
{
disableZeroAffectedRows = true;
}
}
/*
* Because the user should not be able to directly create a
* DataReader object, the constructors are
* marked as internal.
*/
internal MySqlDataReader(MySqlCommand cmd, PreparableStatement statement, CommandBehavior behavior)
{
this.command = cmd;
connection = (MySqlConnection)command.Connection;
commandBehavior = behavior;
driver = connection.driver;
affectedRows = -1;
this.statement = statement;
#if !RT && !NETSTANDARD1_3
if (cmd.CommandType == CommandType.StoredProcedure &&
cmd.UpdatedRowSource == UpdateRowSource.FirstReturnedRecord
)
{
disableZeroAffectedRows = true;
}
#endif
}
private void Prepare(int cursorPageSize)
{
using (new CommandTimer(this.Connection, this.CommandTimeout))
{
string commandText = this.CommandText;
if (commandText != null && commandText.Trim().Length != 0)
{
if (this.CommandType == CommandType.StoredProcedure)
{
this.statement = new StoredProcedure(this, this.CommandText);
}
else
{
this.statement = new PreparableStatement(this, this.CommandText);
}
this.statement.Resolve(true);
this.statement.Prepare();
}
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
public new MySqlDataReader ExecuteReader(CommandBehavior behavior)
{
lastInsertedId = -1;
CheckState();
if (cmdText == null ||
cmdText.Trim().Length == 0)
throw new InvalidOperationException(Resources.CommandTextNotInitialized);
string sql = TrimSemicolons(cmdText);
// now we check to see if we are executing a query that is buggy
// in 4.1
connection.IsExecutingBuggyQuery = false;
if (!connection.driver.Version.isAtLeast(5, 0, 0) &&
connection.driver.Version.isAtLeast(4, 1, 0))
{
string snippet = sql;
if (snippet.Length > 17)
snippet = sql.Substring(0, 17);
snippet = snippet.ToLower(CultureInfo.InvariantCulture);
connection.IsExecutingBuggyQuery =
snippet.StartsWith("describe") ||
snippet.StartsWith("show table status");
}
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();
// Now that we have completed our resolve step, we can handle our
// command behaviors
HandleCommandBehaviors(behavior);
updatedRowCount = -1;
Timer timer = null;
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
// start a threading timer on our command timeout
timedOut = false;
canceled = false;
// execute the statement
statement.Execute();
// start a timeout timer
if (connection.driver.Version.isAtLeast(5, 0, 0) &&
commandTimeout > 0)
{
TimerCallback timerDelegate =
new TimerCallback(TimeoutExpired);
timer = new Timer(timerDelegate, this, this.CommandTimeout * 1000, Timeout.Infinite);
}
// wait for data to return
reader.NextResult();
connection.Reader = reader;
return reader;
}
catch (MySqlException ex)
{
// if we caught an exception because of a cancel, then just return null
if (ex.Number == 1317)
{
if (TimedOut)
throw new MySqlException(Resources.Timeout);
return null;
}
if (ex.IsFatal)
Connection.Close();
if (ex.Number == 0)
throw new MySqlException(Resources.FatalErrorDuringExecute, ex);
throw;
}
finally
{
if (timer != null)
timer.Dispose();
}
}
public new MySqlDataReader ExecuteReader(CommandBehavior behavior)
{
MySqlDataReader result = null;
if (this.connection != null && this.connection.commandInterceptor != null && this.connection.commandInterceptor.ExecuteReader(this.CommandText, behavior, ref result))
{
return(result);
}
bool flag = false;
this.CheckState();
Driver driver = this.connection.driver;
this.cmdText = this.cmdText.Trim();
if (string.IsNullOrEmpty(this.cmdText))
{
this.Throw(new InvalidOperationException(Resources.CommandTextNotInitialized));
}
string text = this.cmdText.Trim(new char[]
{
';'
});
if (this.connection.hasBeenOpen && !driver.HasStatus(ServerStatusFlags.InTransaction))
{
ReplicationManager.GetNewConnection(this.connection.Settings.Server, !this.IsReadOnlyCommand(text), this.connection);
}
Driver obj = driver;
MySqlDataReader result2;
lock (obj)
{
if (this.connection.Reader != null)
{
this.Throw(new MySqlException(Resources.DataReaderOpen));
}
Transaction current = System.Transactions.Transaction.Current;
if (current != null)
{
bool flag3 = false;
if (driver.CurrentTransaction != null)
{
flag3 = driver.CurrentTransaction.InRollback;
}
if (!flag3)
{
TransactionStatus transactionStatus = TransactionStatus.InDoubt;
try
{
transactionStatus = current.TransactionInformation.Status;
}
catch (TransactionException)
{
}
if (transactionStatus == TransactionStatus.Aborted)
{
this.Throw(new TransactionAbortedException());
}
}
}
this.commandTimer = new CommandTimer(this.connection, this.CommandTimeout);
this.lastInsertedId = -1L;
if (this.CommandType == CommandType.TableDirect)
{
text = "SELECT * FROM " + text;
}
else if (this.CommandType == CommandType.Text && text.IndexOf(" ") == -1 && this.AddCallStatement(text))
{
text = "call " + text;
}
if (this.connection.Settings.Replication && !this.InternallyCreated)
{
this.EnsureCommandIsReadOnly(text);
}
if (this.statement == null || !this.statement.IsPrepared)
{
if (this.CommandType == CommandType.StoredProcedure)
{
this.statement = new StoredProcedure(this, text);
}
else
{
this.statement = new PreparableStatement(this, text);
}
}
this.statement.Resolve(false);
this.HandleCommandBehaviors(behavior);
this.updatedRowCount = -1L;
try
{
MySqlDataReader mySqlDataReader = new MySqlDataReader(this, this.statement, behavior);
this.connection.Reader = mySqlDataReader;
this.canceled = false;
this.statement.Execute();
mySqlDataReader.NextResult();
flag = true;
result2 = mySqlDataReader;
}
catch (TimeoutException ex)
{
this.connection.HandleTimeoutOrThreadAbort(ex);
throw;
}
catch (ThreadAbortException ex2)
{
this.connection.HandleTimeoutOrThreadAbort(ex2);
throw;
}
catch (IOException ex3)
{
this.connection.Abort();
throw new MySqlException(Resources.FatalErrorDuringExecute, ex3);
}
catch (MySqlException ex4)
{
if (ex4.InnerException is TimeoutException)
{
throw;
}
try
{
this.ResetReader();
this.ResetSqlSelectLimit();
}
catch (Exception)
{
this.Connection.Abort();
throw new MySqlException(ex4.Message, true, ex4);
}
if (ex4.IsQueryAborted)
{
result2 = null;
}
else
{
if (ex4.IsFatal)
{
this.Connection.Close();
}
if (ex4.Number == 0)
{
throw new MySqlException(Resources.FatalErrorDuringExecute, ex4);
}
throw;
}
}
finally
{
if (this.connection != null)
{
if (this.connection.Reader == null)
{
this.ClearCommandTimer();
}
if (!flag)
{
this.ResetReader();
}
}
}
}
return(result2);
}
/// <include file='docs/mysqlcommand.xml' path='docs/Prepare2/*'/>
private void Prepare(int cursorPageSize)
{
if (!connection.driver.Version.isAtLeast(5, 0, 0) && cursorPageSize > 0)
throw new InvalidOperationException("Nested commands are only supported on MySQL 5.0 and later");
using (new CommandTimer(Connection, CommandTimeout))
{
// if the length of the command text is zero, then just return
string psSQL = CommandText;
if (psSQL == null ||
psSQL.Trim().Length == 0)
return;
if (CommandType == CommandType.StoredProcedure)
statement = new StoredProcedure(this, CommandText);
else
statement = new PreparableStatement(this, CommandText);
statement.Resolve(true);
statement.Prepare();
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
public new MySqlDataReader ExecuteReader (CommandBehavior behavior)
{
CheckState();
Driver driver = connection.driver;
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 !CF
System.Transactions.Transaction curTrans = System.Transactions.Transaction.Current;
if (curTrans != null)
{
TransactionStatus status = 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(TransactionException)
{
}
if (status == TransactionStatus.Aborted)
throw new TransactionAbortedException();
}
#endif
commandTimer = new CommandTimer(connection, CommandTimeout);
lastInsertedId = -1;
if (cmdText == null ||
cmdText.Trim().Length == 0)
throw new InvalidOperationException(Resources.CommandTextNotInitialized);
string sql = TrimSemicolons(cmdText);
if (CommandType == CommandType.TableDirect)
sql = "SELECT * FROM " + sql;
// now we check to see if we are executing a query that is buggy
// in 4.1
connection.driver.IsExecutingBuggyQuery = false;
if (!connection.driver.Version.isAtLeast(5, 0, 0) &&
connection.driver.Version.isAtLeast(4, 1, 0))
{
string snippet = sql;
if (snippet.Length > 17)
snippet = sql.Substring(0, 17);
snippet = snippet.ToUpper(CultureInfo.InvariantCulture);
connection.driver.IsExecutingBuggyQuery =
snippet.StartsWith("DESCRIBE") ||
snippet.StartsWith("SHOW TABLE STATUS");
}
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);
updatedRowCount = -1;
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
connection.Reader = reader;
// execute the statement
statement.Execute();
// wait for data to return
reader.NextResult();
return reader;
}
catch (TimeoutException tex)
{
connection.HandleTimeout(tex);
return null;
}
catch (MySqlException ex)
{
connection.Reader = null;
if (ex.InnerException is TimeoutException)
throw ex; // already handled
try
{
ResetSqlSelectLimit();
}
catch (Exception ex2)
{
// 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.Number == 1317)
return null;
if (ex.IsFatal)
Connection.Close();
if (ex.Number == 0)
throw new MySqlException(Resources.FatalErrorDuringExecute, ex);
throw;
}
finally
{
if (connection != null && connection.Reader == null)
{
// Comething want seriously wrong, and reader would not be
// able to clear timeout on closing.
// So we clear timeout here.
ClearCommandTimer();
}
}
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
public new MySqlDataReader ExecuteReader(CommandBehavior behavior)
{
bool success = false;
CheckState();
Driver driver = connection.driver;
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 !CF
System.Transactions.Transaction curTrans = System.Transactions.Transaction.Current;
if (curTrans != null)
{
bool inRollback = false;
if (driver.CurrentTransaction != null)
{
inRollback = driver.CurrentTransaction.InRollback;
}
if (!inRollback)
{
TransactionStatus status = 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 (TransactionException)
{
}
if (status == TransactionStatus.Aborted)
{
throw new TransactionAbortedException();
}
}
}
#endif
commandTimer = new CommandTimer(connection, CommandTimeout);
lastInsertedId = -1;
if (cmdText == null ||
cmdText.Trim().Length == 0)
{
throw new InvalidOperationException(Resources.CommandTextNotInitialized);
}
string sql = TrimSemicolons(cmdText);
if (CommandType == CommandType.TableDirect)
{
sql = "SELECT * FROM " + 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);
updatedRowCount = -1;
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
connection.Reader = reader;
// 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 (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();
}
}
}
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
public new MySqlDataReader ExecuteReader(CommandBehavior behavior)
{
// interceptors didn't handle this so we fall through
bool success = false;
CheckState();
Driver driver = connection.driver;
cmdText = cmdText.Trim();
string sql = cmdText.Trim(';');
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"));
}
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);
updatedRowCount = -1;
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
connection.Reader = 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();
}
}
}
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
public new MySqlDataReader ExecuteReader(CommandBehavior behavior)
{
#if !CF && !RT
// 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 !CF
// 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 !CF && !RT
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 && !SingleWordKeywords.Contains(sql.ToUpper()))
{
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);
updatedRowCount = -1;
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
connection.Reader = 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();
}
}
}
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
public new MySqlDataReader ExecuteReader(CommandBehavior behavior)
{
// interceptors didn't handle this so we fall through
bool success = false;
CheckState();
Driver driver = connection.driver;
cmdText = cmdText.Trim();
string sql = cmdText.Trim(';');
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"));
}
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);
updatedRowCount = -1;
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
connection.Reader = 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();
}
}
}
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
private void InnerBeginExecuteReader(CommandBehavior behavior)
{
CheckState();
Driver driver = connection.driver;
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 !CF
System.Transactions.Transaction curTrans = System.Transactions.Transaction.Current;
if (curTrans != null)
{
bool inRollback = false;
if (driver.CurrentTransaction != null)
inRollback = driver.CurrentTransaction.InRollback;
if (!inRollback)
{
TransactionStatus status = 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 (TransactionException)
{
}
if (status == TransactionStatus.Aborted)
throw new TransactionAbortedException();
}
}
#endif
commandTimer = new CommandTimer(connection, CommandTimeout);
lastInsertedId = -1;
cmdText = cmdText.Trim();
if (String.IsNullOrEmpty(cmdText))
throw new InvalidOperationException(Resources.CommandTextNotInitialized);
string sql = cmdText.Trim(';');
if (CommandType == CommandType.TableDirect)
sql = "SELECT * FROM " + 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);
updatedRowCount = -1;
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
connection.Reader = reader;
canceled = false;
// execute the statement
statement.Execute();
// wait for data to return
reader.BeginNextResult();
MysqlAsyncResult result = _asyncResult as MysqlAsyncResult;
result.DataReader = 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
//只有主动调用Cancel时才会出现这个异常，注释让他throw吧
//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();
}
}
}
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
public new MySqlDataReader ExecuteReader(CommandBehavior behavior)
{
lastInsertedId = -1;
CheckState();
if (cmdText == null ||
cmdText.Trim().Length == 0)
{
throw new InvalidOperationException(Resources.CommandTextNotInitialized);
}
string sql = TrimSemicolons(cmdText);
// now we check to see if we are executing a query that is buggy
// in 4.1
connection.IsExecutingBuggyQuery = false;
if (!connection.driver.Version.isAtLeast(5, 0, 0) &&
connection.driver.Version.isAtLeast(4, 1, 0))
{
string snippet = sql;
if (snippet.Length > 17)
{
snippet = sql.Substring(0, 17);
}
snippet = snippet.ToLower(CultureInfo.InvariantCulture);
connection.IsExecutingBuggyQuery =
snippet.StartsWith("describe") ||
snippet.StartsWith("show table status");
}
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();
// Now that we have completed our resolve step, we can handle our
// command behaviors
HandleCommandBehaviors(behavior);
updatedRowCount = -1;
Timer timer = null;
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
// start a threading timer on our command timeout
timedOut = false;
canceled = false;
// execute the statement
statement.Execute();
// start a timeout timer
if (connection.driver.Version.isAtLeast(5, 0, 0) &&
commandTimeout > 0)
{
TimerCallback timerDelegate =
new TimerCallback(TimeoutExpired);
timer = new Timer(timerDelegate, this, this.CommandTimeout * 1000, Timeout.Infinite);
}
// wait for data to return
reader.NextResult();
connection.Reader = reader;
return(reader);
}
catch (MySqlException ex)
{
try
{
ResetSqlSelectLimit();
}
catch (Exception) { }
// if we caught an exception because of a cancel, then just return null
if (ex.Number == 1317)
{
if (TimedOut)
{
throw new MySqlException(Resources.Timeout);
}
return(null);
}
if (ex.IsFatal)
{
Connection.Close();
}
if (ex.Number == 0)
{
throw new MySqlException(Resources.FatalErrorDuringExecute, ex);
}
throw;
}
finally
{
if (timer != null)
{
timer.Dispose();
}
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
public new MySqlDataReader ExecuteReader(CommandBehavior behavior)
{
// give our interceptors a shot at it first
MySqlDataReader interceptedReader = null;
if (connection?.commandInterceptor != null && connection.commandInterceptor.ExecuteReader(CommandText, behavior, ref interceptedReader))
{
return(interceptedReader);
}
// 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 !NETSTANDARD1_3
// 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_3
System.Transactions.Transaction curTrans = System.Transactions.Transaction.Current;
if (curTrans != null)
{
bool inRollback = false;
//TODO: ADD support for 452 and 46X
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 = 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
}
#if !NETSTANDARD1_3
catch (ThreadAbortException taex)
{
connection.HandleTimeoutOrThreadAbort(taex);
throw;
}
#endif
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();
}
}
}
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
private void InnerBeginExecuteReader(CommandBehavior behavior)
{
lastInsertedId = -1;
CheckState();
if (cmdText == null ||
cmdText.Trim().Length == 0)
throw new InvalidOperationException(Resources.CommandTextNotInitialized);
string sql = TrimSemicolons(cmdText);
// now we check to see if we are executing a query that is buggy
// in 4.1
connection.IsExecutingBuggyQuery = false;
if (!connection.driver.Version.isAtLeast(5, 0, 0) &&
connection.driver.Version.isAtLeast(4, 1, 0))
{
string snippet = sql;
if (snippet.Length > 17)
snippet = sql.Substring(0, 17);
snippet = snippet.ToLower(CultureInfo.InvariantCulture);
connection.IsExecutingBuggyQuery =
snippet.StartsWith("describe") ||
snippet.StartsWith("show table status");
}
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();
// Now that we have completed our resolve step, we can handle our
// command behaviors
HandleCommandBehaviors(behavior);
updatedRowCount = -1;
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
// start a threading timer on our command timeout
timedOut = false;
canceled = false;
// execute the statement
statement.Execute();
// start a timeout timer
if (connection.driver.Version.isAtLeast(5, 0, 0) &&commandTimeout > 0)
{
ExecuteQueryManager.Instace.Add(this);
}
reader.BeginNextResult();
MysqlAsyncResult result = _asyncResult as MysqlAsyncResult;
result.DataReader = reader;
}
catch (MySqlException ex)
{
if (ex.IsFatal)
Connection.Close();
if (ex.Number == 0)
throw new MySqlException(Resources.FatalErrorDuringExecute, ex);
throw;
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/Prepare2/*'/>
private void Prepare(int cursorPageSize)
{
using (new CommandTimer(Connection, CommandTimeout))
{
// if the length of the command text is zero, then just return
string psSQL = CommandText;
if (psSQL == null ||
psSQL.Trim().Length == 0)
return;
if (CommandType == CommandType.StoredProcedure)
statement = new StoredProcedure(this, CommandText);
else
statement = new PreparableStatement(this, CommandText);
statement.Resolve(true);
statement.Prepare();
}
}
/// <include file='docs/mysqlcommand.xml' path='docs/ExecuteReader1/*'/>
public new MySqlDataReader ExecuteReader(CommandBehavior behavior)
{
lastInsertedId = -1;
CheckState();
if (cmdText == null ||
cmdText.Trim().Length == 0)
{
throw new InvalidOperationException(Resources.CommandTextNotInitialized);
}
string sql = TrimSemicolons(cmdText);
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();
// Now that we have completed our resolve step, we can handle our
// command behaviors
HandleCommandBehaviors(behavior);
updatedRowCount = -1;
try
{
MySqlDataReader reader = new MySqlDataReader(this, statement, behavior);
// start a threading timer on our command timeout
timedOut = false;
Timer t = null;
querySent.Reset();
if (connection.driver.Version.isAtLeast(5, 0, 0) &&
commandTimeout > 0)
{
TimerCallback timerDelegate =
new TimerCallback(TimeoutExpired);
t = new Timer(timerDelegate, this, this.CommandTimeout * 1000, Timeout.Infinite);
}
// execute the statement
statement.Execute();
querySent.Set();
canCancel = true;
reader.NextResult();
if (t != null)
{
t.Dispose();
}
canCancel = false;
connection.Reader = reader;
return(reader);
}
catch (MySqlException ex)
{
// if we caught an exception because of a cancel, then just return null
if (ex.Number == 1317)
{
if (timedOut)
{
throw new MySqlException(Resources.Timeout);
}
return(null);
}
throw;
}
finally
{
querySent.Reset();
canCancel = false;
}
}