/// <summary>
/// Executes a single command against a MySQL database. The <see cref="MySqlConnection"/> is assumed to be
/// open when the method is called and remains open after the method completes.
/// </summary>
/// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
/// <param name="commandText">SQL command to be executed</param>
/// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command.</param>
/// <returns></returns>
public static int ExecuteNonQuery(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
{
//create a command and prepare it for execution
MySqlCommand cmd = new MySqlCommand();
cmd.Connection = connection;
cmd.CommandText = commandText;
cmd.CommandType = CommandType.Text;
if (commandParameters != null)
foreach (MySqlParameter p in commandParameters)
cmd.Parameters.Add(p);
int result = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return result;
}
private string SetUserVariables(MySqlParameterCollection parms, bool preparing)
{
StringBuilder setSql = new StringBuilder();
if (serverProvidingOutputParameters) return setSql.ToString();
string delimiter = String.Empty;
foreach (MySqlParameter p in parms)
{
if (p.Direction != ParameterDirection.InputOutput) continue;
string pName = "@" + p.BaseName;
string uName = "@" + ParameterPrefix + p.BaseName;
string sql = String.Format("SET {0}={1}", uName, pName);
if (command.Connection.Settings.AllowBatch && !preparing)
{
setSql.AppendFormat(CultureInfo.InvariantCulture, "{0}{1}", delimiter, sql);
delimiter = "; ";
}
else
{
MySqlCommand cmd = new MySqlCommand(sql, command.Connection);
cmd.Parameters.Add(p);
cmd.ExecuteNonQuery();
}
}
if (setSql.Length > 0)
setSql.Append("; ");
return setSql.ToString();
}
/// <summary>
/// Reset SQL_SELECT_LIMIT that could have been modified by CommandBehavior.
/// </summary>
internal void ResetSqlSelectLimit()
{
// if we are supposed to reset the sql select limit, do that here
if (resetSqlSelect)
{
resetSqlSelect = false;
MySqlCommand command = new MySqlCommand("SET SQL_SELECT_LIMIT=DEFAULT", connection);
command.internallyCreated = true;
command.ExecuteNonQuery();
}
}
public void CancelQuery(int timeout)
{
using (MySqlConnection c = Clone())
{
c.isKillQueryConnection = true;
c.Open();
string commandText = "KILL QUERY " + ServerThread;
MySqlCommand cmd = new MySqlCommand(commandText, c);
cmd.CommandTimeout = timeout;
cmd.ExecuteNonQuery();
}
}
/// <summary>
/// Executes this instance.
/// </summary>
/// <returns>The number of statements executed as part of the script.</returns>
public int Execute()
{
bool openedConnection = false;
if (connection == null)
throw new InvalidOperationException(Resources.ConnectionNotSet);
if (query == null || query.Length == 0)
return 0;
// next we open up the connetion if it is not already open
if (connection.State != ConnectionState.Open)
{
openedConnection = true;
connection.Open();
}
// since we don't allow setting of parameters on a script we can
// therefore safely allow the use of user variables. no one should be using
// this connection while we are using it so we can temporarily tell it
// to allow the use of user variables
bool allowUserVars = connection.Settings.AllowUserVariables;
connection.Settings.AllowUserVariables = true;
try
{
bool ansiQuotes = -1 != -1;
bool noBackslashEscapes = -1 != -1;
// first we break the query up into smaller queries
List<ScriptStatement> statements = BreakIntoStatements(ansiQuotes, noBackslashEscapes);
int count = 0;
MySqlCommand cmd = new MySqlCommand(null, connection);
foreach (ScriptStatement statement in statements)
{
if (String.IsNullOrEmpty(statement.text)) continue;
cmd.CommandText = statement.text;
try
{
cmd.ExecuteNonQuery();
count++;
OnQueryExecuted(statement);
}
catch (Exception ex)
{
if (Error == null)
throw;
if (!OnScriptError(ex))
break;
}
}
OnScriptCompleted();
return count;
}
finally
{
connection.Settings.AllowUserVariables = allowUserVars;
if (openedConnection)
{
connection.Close();
}
}
}
public new MySqlTransaction BeginTransaction(IsolationLevel iso)
{
//TODO: check note in help
if (State != ConnectionState.Open)
Throw(new InvalidOperationException(Resources.ConnectionNotOpen));
// First check to see if we are in a current transaction
if (driver.HasStatus(ServerStatusFlags.InTransaction))
Throw(new InvalidOperationException(Resources.NoNestedTransactions));
MySqlTransaction t = new MySqlTransaction(this, iso);
MySqlCommand cmd = new MySqlCommand("", this);
cmd.CommandText = "SET SESSION TRANSACTION ISOLATION LEVEL ";
switch (iso)
{
case IsolationLevel.ReadCommitted:
cmd.CommandText += "READ COMMITTED";
break;
case IsolationLevel.ReadUncommitted:
cmd.CommandText += "READ UNCOMMITTED";
break;
case IsolationLevel.RepeatableRead:
cmd.CommandText += "REPEATABLE READ";
break;
case IsolationLevel.Serializable:
cmd.CommandText += "SERIALIZABLE";
break;
case IsolationLevel.Chaos:
Throw(new NotSupportedException(Resources.ChaosNotSupported));
break;
case IsolationLevel.Snapshot:
Throw(new NotSupportedException(Resources.SnapshotNotSupported));
break;
}
cmd.ExecuteNonQuery();
cmd.CommandText = "BEGIN";
cmd.ExecuteNonQuery();
return t;
}
public virtual void Configure(MySqlConnection connection)
{
//bool firstConfigure = false;
// if we have not already configured our server variables
// then do so now
//if (serverProps == null)
//{
// firstConfigure = true;
// // if we are in a pool and the user has said it's ok to cache the
// // properties, then grab it from the pool
// if (Pool != null && Settings.CacheServerProperties)
// {
// if (Pool.ServerProperties == null)
// Pool.ServerProperties = LoadServerProperties(connection);
// serverProps = Pool.ServerProperties;
// }
// else
// serverProps = LoadServerProperties(connection);
//}
if (charSets != null)
LoadCharacterSets(connection);
// if the user has indicated that we are not to reset
// the connection and this is not our first time through,
// then we are done.
if (!Settings.ConnectionReset) return;
string charSet = connectionString.CharacterSet;
if (charSet == null || charSet.Length == 0)
{
if (serverCharSetIndex >= 0)
charSet = (string)charSets[serverCharSetIndex];
else
charSet = serverCharSet;
}
// now tell the server which character set we will send queries in and which charset we
// want results in
MySqlCommand charSetCmd = new MySqlCommand("SET character_set_results=NULL",
connection);
charSetCmd.InternallyCreated = true;
const string CLIENT_CHAR_SET = "latin1";
const string CONN_CHAR_SET = "latin1";
if ((CLIENT_CHAR_SET != null && CLIENT_CHAR_SET != charSet) ||
(CONN_CHAR_SET != null && CONN_CHAR_SET != charSet))
{
MySqlCommand setNamesCmd = new MySqlCommand("SET NAMES " + charSet, connection);
setNamesCmd.InternallyCreated = true;
setNamesCmd.ExecuteNonQuery();
}
charSetCmd.ExecuteNonQuery();
if (charSet != null)
Encoding = CharSetMap.GetEncoding(Version, charSet);
else
Encoding = CharSetMap.GetEncoding(Version, "latin1");
handler.Configure();
}
/// <summary>
/// Execute the load operation
/// </summary>
/// <returns>The number of rows inserted.</returns>
public int Load()
{
bool openedConnection = false;
if (Connection == null)
throw new InvalidOperationException(Resources.ConnectionNotSet);
// next we open up the connetion if it is not already open
if (connection.State != ConnectionState.Open)
{
openedConnection = true;
connection.Open();
}
try
{
string sql = BuildSqlCommand();
MySqlCommand cmd = new MySqlCommand(sql, Connection);
cmd.CommandTimeout = Timeout;
return cmd.ExecuteNonQuery();
}
finally
{
if (openedConnection)
connection.Close();
}
}
public override void Commit()
{
if (conn == null || (conn.State != ConnectionState.Open && !conn.SoftClosed))
throw new InvalidOperationException("Connection must be valid and open to commit transaction");
if (!open)
throw new InvalidOperationException("Transaction has already been committed or is not pending");
MySqlCommand cmd = new MySqlCommand("COMMIT", conn);
cmd.ExecuteNonQuery();
open = false;
}
public override void Rollback()
{
if (conn == null || (conn.State != ConnectionState.Open && !conn.SoftClosed))
throw new InvalidOperationException("Connection must be valid and open to rollback transaction");
if (!open)
throw new InvalidOperationException("Transaction has already been rolled back or is not pending");
MySqlCommand cmd = new MySqlCommand("ROLLBACK", conn);
cmd.ExecuteNonQuery();
open = false;
}