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1020 lines
29 KiB
1020 lines
29 KiB
// Copyright ?2004, 2018 Oracle and/or its affiliates. All rights reserved.
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//
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// MySQL Connector/NET is licensed under the terms of the GPLv2
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// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
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// MySQL Connectors. There are special exceptions to the terms and
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// conditions of the GPLv2 as it is applied to this software, see the
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// FLOSS License Exception
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// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published
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// by the Free Software Foundation; version 2 of the License.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#if MYSQL_6_9
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using System;
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using System.Data;
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using System.Data.Common;
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using System.Collections;
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using Externals.MySql.Data.Types;
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using System.Collections.Generic;
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using System.Globalization;
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using Externals.MySql.Data.MySqlClient.Properties;
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using Externals.MySql.Data.Common;
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using Externals.MySql.Data.MySqlClient;
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using System.Threading;
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namespace Externals.MySql.Data.MySqlClient
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{
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internal sealed partial class MySqlDataReader : IDisposable
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{
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// The DataReader should always be open when returned to the user.
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private bool isOpen = true;
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private CommandBehavior commandBehavior;
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private MySqlCommand command;
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internal long affectedRows;
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internal Driver driver;
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private PreparableStatement statement;
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private ResultSet resultSet;
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private bool disposed = false;
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// Used in special circumstances with stored procs to avoid exceptions from DbDataAdapter
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// If set, AffectedRows returns -1 instead of 0.
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private bool disableZeroAffectedRows;
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/*
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* Keep track of the connection in order to implement the
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* CommandBehavior.CloseConnection flag. A null reference means
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* normal behavior (do not automatically close).
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*/
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private MySqlConnection connection;
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/*
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* Because the user should not be able to directly create a
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* DataReader object, the constructors are
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* marked as internal.
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*/
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internal MySqlDataReader(MySqlCommand cmd, PreparableStatement statement, CommandBehavior behavior)
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{
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this.command = cmd;
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connection = (MySqlConnection)command.Connection;
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commandBehavior = behavior;
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driver = connection.driver;
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affectedRows = -1;
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this.statement = statement;
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if (cmd.CommandType == CommandType.StoredProcedure
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&& cmd.UpdatedRowSource == UpdateRowSource.FirstReturnedRecord
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)
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{
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disableZeroAffectedRows = true;
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}
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}
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#region Properties
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internal PreparableStatement Statement
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{
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get { return statement; }
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}
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internal MySqlCommand Command
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{
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get { return command; }
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}
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internal ResultSet ResultSet
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{
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get { return resultSet; }
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}
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internal CommandBehavior CommandBehavior
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{
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get { return commandBehavior; }
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}
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/// <summary>
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/// Gets the number of columns in the current row.
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/// </summary>
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public override int FieldCount
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{
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get { return resultSet == null ? 0 : resultSet.Size; }
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}
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/// <summary>
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/// Gets a value indicating whether the MySqlDataReader contains one or more rows.
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/// </summary>
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public override bool HasRows
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{
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get { return resultSet == null ? false : resultSet.HasRows; }
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}
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/// <summary>
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/// Gets a value indicating whether the data reader is closed.
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/// </summary>
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public override bool IsClosed
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{
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get { return !isOpen; }
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}
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/// <summary>
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/// Gets the number of rows changed, inserted, or deleted by execution of the SQL statement.
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/// </summary>
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public override int RecordsAffected
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{
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// RecordsAffected returns the number of rows affected in batch
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// statments from insert/delete/update statments. This property
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// is not completely accurate until .Close() has been called.
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get
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{
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if (disableZeroAffectedRows)
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{
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// In special case of updating stored procedure called from
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// within data adapter, we return -1 to avoid exceptions
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// (s. Bug#54895)
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if (affectedRows == 0)
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return -1;
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}
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return (int)affectedRows;
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}
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}
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/// <summary>
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/// Overloaded. Gets the value of a column in its native format.
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/// In C#, this property is the indexer for the MySqlDataReader class.
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/// </summary>
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public override object this[int i]
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{
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get { return GetValue(i); }
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}
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/// <summary>
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/// Gets the value of a column in its native format.
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/// [C#] In C#, this property is the indexer for the MySqlDataReader class.
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/// </summary>
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public override object this[String name]
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{
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// Look up the ordinal and return
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// the value at that position.
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get { return this[GetOrdinal(name)]; }
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}
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#endregion
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/// <summary>
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/// Closes the MySqlDataReader object.
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/// </summary>
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public override void Close()
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{
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if (!isOpen) return;
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bool shouldCloseConnection = (commandBehavior & CommandBehavior.CloseConnection) != 0;
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CommandBehavior originalBehavior = commandBehavior;
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// clear all remaining resultsets
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try
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{
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// Temporarily change to Default behavior to allow NextResult to finish properly.
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if (!originalBehavior.Equals(CommandBehavior.SchemaOnly))
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commandBehavior = CommandBehavior.Default;
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while (NextResult()) { }
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}
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catch (MySqlException ex)
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{
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// Ignore aborted queries
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if (!ex.IsQueryAborted)
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{
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// ignore IO exceptions.
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// We are closing or disposing reader, and do not
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// want exception to be propagated to used. If socket is
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// is closed on the server side, next query will run into
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// IO exception. If reader is closed by GC, we also would
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// like to avoid any exception here.
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bool isIOException = false;
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for (Exception exception = ex; exception != null;
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exception = exception.InnerException)
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{
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if (exception is System.IO.IOException)
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{
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isIOException = true;
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break;
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}
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}
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if (!isIOException)
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{
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// Ordinary exception (neither IO nor query aborted)
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throw;
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}
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}
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}
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catch (System.IO.IOException)
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{
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// eat, on the same reason we eat IO exceptions wrapped into
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// MySqlExceptions reasons, described above.
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}
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finally
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{
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// always ensure internal reader is null (Bug #55558)
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connection.Reader = null;
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commandBehavior = originalBehavior;
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}
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// we now give the command a chance to terminate. In the case of
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// stored procedures it needs to update out and inout parameters
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command.Close(this);
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commandBehavior = CommandBehavior.Default;
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if (this.command.Canceled && connection.driver.Version.isAtLeast(5, 1, 0))
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{
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// Issue dummy command to clear kill flag
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ClearKillFlag();
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}
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if (shouldCloseConnection)
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connection.Close();
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command = null;
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connection.IsInUse = false;
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connection = null;
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isOpen = false;
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}
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#region TypeSafe Accessors
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/// <summary>
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/// Gets the value of the specified column as a Boolean.
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/// </summary>
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/// <param name="name"></param>
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/// <returns></returns>
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public bool GetBoolean(string name)
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{
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return GetBoolean(GetOrdinal(name));
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}
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/// <summary>
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/// Gets the value of the specified column as a Boolean.
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/// </summary>
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/// <param name="i"></param>
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/// <returns></returns>
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public override bool GetBoolean(int i)
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{
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return Convert.ToBoolean(GetValue(i));
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}
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/// <summary>
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/// Gets the value of the specified column as a byte.
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/// </summary>
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/// <param name="name"></param>
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/// <returns></returns>
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public byte GetByte(string name)
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{
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return GetByte(GetOrdinal(name));
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}
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/// <summary>
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/// Gets the value of the specified column as a byte.
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/// </summary>
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/// <param name="i"></param>
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/// <returns></returns>
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public override byte GetByte(int i)
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{
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IMySqlValue v = GetFieldValue(i, false);
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if (v is MySqlUByte)
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return ((MySqlUByte)v).Value;
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else
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return (byte)((MySqlByte)v).Value;
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}
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/// <summary>
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/// Gets the value of the specified column as a sbyte.
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/// </summary>
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/// <param name="name"></param>
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/// <returns></returns>
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public sbyte GetSByte(string name)
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{
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return GetSByte(GetOrdinal(name));
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}
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/// <summary>
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/// Gets the value of the specified column as a sbyte.
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/// </summary>
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/// <param name="i"></param>
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/// <returns></returns>
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public sbyte GetSByte(int i)
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{
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IMySqlValue v = GetFieldValue(i, false);
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if (v is MySqlByte)
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return ((MySqlByte)v).Value;
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else
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return (sbyte)((MySqlByte)v).Value;
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}
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/// <summary>
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/// Reads a stream of bytes from the specified column offset into the buffer an array starting at the given buffer offset.
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/// </summary>
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/// <param name="i">The zero-based column ordinal. </param>
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/// <param name="fieldOffset">The index within the field from which to begin the read operation. </param>
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/// <param name="buffer">The buffer into which to read the stream of bytes. </param>
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/// <param name="bufferoffset">The index for buffer to begin the read operation. </param>
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/// <param name="length">The maximum length to copy into the buffer. </param>
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/// <returns>The actual number of bytes read.</returns>
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public override long GetBytes(int i, long fieldOffset, byte[] buffer, int bufferoffset, int length)
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{
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if (i >= FieldCount)
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Throw(new IndexOutOfRangeException());
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IMySqlValue val = GetFieldValue(i, false);
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if (!(val is MySqlBinary) && !(val is MySqlGuid))
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Throw(new MySqlException("GetBytes can only be called on binary or guid columns"));
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byte[] bytes = null;
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if (val is MySqlBinary)
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bytes = ((MySqlBinary)val).Value;
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else
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bytes = ((MySqlGuid)val).Bytes;
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if (buffer == null)
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return bytes.Length;
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if (bufferoffset >= buffer.Length || bufferoffset < 0)
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Throw(new IndexOutOfRangeException("Buffer index must be a valid index in buffer"));
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if (buffer.Length < (bufferoffset + length))
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Throw(new ArgumentException("Buffer is not large enough to hold the requested data"));
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if (fieldOffset < 0 ||
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((ulong)fieldOffset >= (ulong)bytes.Length && (ulong)bytes.Length > 0))
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Throw(new IndexOutOfRangeException("Data index must be a valid index in the field"));
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// adjust the length so we don't run off the end
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if ((ulong)bytes.Length < (ulong)(fieldOffset + length))
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{
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length = (int)((ulong)bytes.Length - (ulong)fieldOffset);
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}
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Buffer.BlockCopy(bytes, (int)fieldOffset, buffer, (int)bufferoffset, (int)length);
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return length;
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}
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private object ChangeType(IMySqlValue value, int fieldIndex, Type newType)
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{
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resultSet.Fields[fieldIndex].AddTypeConversion(newType);
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return Convert.ChangeType(value.Value, newType, CultureInfo.InvariantCulture);
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}
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/// <summary>
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/// Gets the value of the specified column as a single character.
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/// </summary>
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/// <param name="name"></param>
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/// <returns></returns>
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public char GetChar(string name)
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{
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return GetChar(GetOrdinal(name));
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}
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/// <summary>
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/// Gets the value of the specified column as a single character.
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/// </summary>
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/// <param name="i"></param>
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/// <returns></returns>
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public override char GetChar(int i)
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{
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string s = GetString(i);
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return s[0];
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}
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/// <summary>
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/// Reads a stream of characters from the specified column offset into the buffer as an array starting at the given buffer offset.
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/// </summary>
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/// <param name="i"></param>
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/// <param name="fieldoffset"></param>
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/// <param name="buffer"></param>
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/// <param name="bufferoffset"></param>
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/// <param name="length"></param>
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/// <returns></returns>
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public override long GetChars(int i, long fieldoffset, char[] buffer, int bufferoffset, int length)
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{
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if (i >= FieldCount)
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Throw(new IndexOutOfRangeException());
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string valAsString = GetString(i);
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if (buffer == null) return valAsString.Length;
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if (bufferoffset >= buffer.Length || bufferoffset < 0)
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Throw(new IndexOutOfRangeException("Buffer index must be a valid index in buffer"));
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if (buffer.Length < (bufferoffset + length))
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Throw(new ArgumentException("Buffer is not large enough to hold the requested data"));
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if (fieldoffset < 0 || fieldoffset >= valAsString.Length)
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Throw(new IndexOutOfRangeException("Field offset must be a valid index in the field"));
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if (valAsString.Length < length)
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length = valAsString.Length;
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valAsString.CopyTo((int)fieldoffset, buffer, bufferoffset, length);
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return length;
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}
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/// <summary>
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/// Gets the name of the source data type.
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/// </summary>
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/// <param name="i"></param>
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/// <returns></returns>
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public override String GetDataTypeName(int i)
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{
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if (!isOpen)
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Throw(new Exception("No current query in data reader"));
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if (i >= FieldCount)
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Throw(new IndexOutOfRangeException());
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// return the name of the type used on the backend
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IMySqlValue v = resultSet.Values[i];
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return v.MySqlTypeName;
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}
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public MySqlDateTime GetMySqlDateTime(string column)
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{
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return GetMySqlDateTime(GetOrdinal(column));
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}
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public MySqlDateTime GetMySqlDateTime(int column)
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{
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return (MySqlDateTime)GetFieldValue(column, true);
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}
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public DateTime GetDateTime(string column)
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{
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return GetDateTime(GetOrdinal(column));
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}
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public override DateTime GetDateTime(int i)
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{
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IMySqlValue val = GetFieldValue(i, true);
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MySqlDateTime dt;
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if (val is MySqlDateTime)
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dt = (MySqlDateTime)val;
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else
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{
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// we need to do this because functions like date_add return string
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string s = GetString(i);
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dt = MySqlDateTime.Parse(s);
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}
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dt.TimezoneOffset = driver.timeZoneOffset;
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if (connection.Settings.ConvertZeroDateTime && !dt.IsValidDateTime)
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return DateTime.MinValue;
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else
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return dt.GetDateTime();
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}
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public MySqlDecimal GetMySqlDecimal(string column)
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{
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return GetMySqlDecimal(GetOrdinal(column));
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}
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public MySqlDecimal GetMySqlDecimal(int i)
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{
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return (MySqlDecimal)GetFieldValue(i, false);
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}
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public Decimal GetDecimal(string column)
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{
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return GetDecimal(GetOrdinal(column));
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}
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public override Decimal GetDecimal(int i)
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{
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IMySqlValue v = GetFieldValue(i, true);
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if (v is MySqlDecimal)
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return ((MySqlDecimal)v).Value;
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return Convert.ToDecimal(v.Value);
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}
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public double GetDouble(string column)
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{
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return GetDouble(GetOrdinal(column));
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}
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public override double GetDouble(int i)
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{
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IMySqlValue v = GetFieldValue(i, true);
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if (v is MySqlDouble)
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return ((MySqlDouble)v).Value;
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return Convert.ToDouble(v.Value);
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}
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public Type GetFieldType(string column)
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|
{
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return GetFieldType(GetOrdinal(column));
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}
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|
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/// <summary>
|
|
/// Gets the Type that is the data type of the object.
|
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/// </summary>
|
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/// <param name="i"></param>
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/// <returns></returns>
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public override Type GetFieldType(int i)
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{
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if (!isOpen)
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Throw(new Exception("No current query in data reader"));
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if (i >= FieldCount)
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Throw(new IndexOutOfRangeException());
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// we have to use the values array directly because we can't go through
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// GetValue
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IMySqlValue v = resultSet.Values[i];
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if (v is MySqlDateTime)
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{
|
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if (!connection.Settings.AllowZeroDateTime)
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return typeof(DateTime);
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return typeof(MySqlDateTime);
|
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}
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return v.SystemType;
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}
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|
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public float GetFloat(string column)
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{
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return GetFloat(GetOrdinal(column));
|
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}
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public override float GetFloat(int i)
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{
|
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IMySqlValue v = GetFieldValue(i, true);
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if (v is MySqlSingle)
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return ((MySqlSingle)v).Value;
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return Convert.ToSingle(v.Value);
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}
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|
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public Guid GetGuid(string column)
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|
{
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|
return GetGuid(GetOrdinal(column));
|
|
}
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|
|
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public override Guid GetGuid(int i)
|
|
{
|
|
object v = GetValue(i);
|
|
if (v is Guid)
|
|
return (Guid)v;
|
|
if (v is string)
|
|
return new Guid(v as string);
|
|
if (v is byte[])
|
|
{
|
|
byte[] bytes = (byte[])v;
|
|
if (bytes.Length == 16)
|
|
return new Guid(bytes);
|
|
}
|
|
Throw(new MySqlException(Resources.ValueNotSupportedForGuid));
|
|
return Guid.Empty; // just to silence compiler
|
|
}
|
|
|
|
public Int16 GetInt16(string column)
|
|
{
|
|
return GetInt16(GetOrdinal(column));
|
|
}
|
|
|
|
public override Int16 GetInt16(int i)
|
|
{
|
|
IMySqlValue v = GetFieldValue(i, true);
|
|
if (v is MySqlInt16)
|
|
return ((MySqlInt16)v).Value;
|
|
|
|
return (short)ChangeType(v, i, typeof(short));
|
|
}
|
|
|
|
public Int32 GetInt32(string column)
|
|
{
|
|
return GetInt32(GetOrdinal(column));
|
|
}
|
|
|
|
public override Int32 GetInt32(int i)
|
|
{
|
|
IMySqlValue v = GetFieldValue(i, true);
|
|
if (v is MySqlInt32)
|
|
return ((MySqlInt32)v).Value;
|
|
|
|
return (Int32)ChangeType(v, i, typeof(Int32));
|
|
}
|
|
|
|
public Int64 GetInt64(string column)
|
|
{
|
|
return GetInt64(GetOrdinal(column));
|
|
}
|
|
|
|
public override Int64 GetInt64(int i)
|
|
{
|
|
IMySqlValue v = GetFieldValue(i, true);
|
|
if (v is MySqlInt64)
|
|
return ((MySqlInt64)v).Value;
|
|
|
|
return (Int64)ChangeType(v, i, typeof(Int64));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the name of the specified column.
|
|
/// </summary>
|
|
/// <param name="i"></param>
|
|
/// <returns></returns>
|
|
public override String GetName(int i)
|
|
{
|
|
if (!isOpen)
|
|
Throw(new Exception("No current query in data reader"));
|
|
if (i >= FieldCount)
|
|
Throw(new IndexOutOfRangeException());
|
|
|
|
return resultSet.Fields[i].ColumnName;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the column ordinal, given the name of the column.
|
|
/// </summary>
|
|
/// <param name="name"></param>
|
|
/// <returns></returns>
|
|
public override int GetOrdinal(string name)
|
|
{
|
|
if (!isOpen || resultSet == null)
|
|
Throw(new Exception("No current query in data reader"));
|
|
|
|
return resultSet.GetOrdinal(name);
|
|
}
|
|
|
|
public string GetString(string column)
|
|
{
|
|
return GetString(GetOrdinal(column));
|
|
}
|
|
|
|
public override String GetString(int i)
|
|
{
|
|
IMySqlValue val = GetFieldValue(i, true);
|
|
|
|
if (val is MySqlBinary)
|
|
{
|
|
byte[] v = ((MySqlBinary)val).Value;
|
|
return resultSet.Fields[i].Encoding.GetString(v, 0, v.Length);
|
|
}
|
|
|
|
return val.Value.ToString();
|
|
}
|
|
|
|
public TimeSpan GetTimeSpan(string column)
|
|
{
|
|
return GetTimeSpan(GetOrdinal(column));
|
|
}
|
|
|
|
public TimeSpan GetTimeSpan(int column)
|
|
{
|
|
IMySqlValue val = GetFieldValue(column, true);
|
|
|
|
MySqlTimeSpan ts = (MySqlTimeSpan)val;
|
|
return ts.Value;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the value of the specified column in its native format.
|
|
/// </summary>
|
|
/// <param name="i"></param>
|
|
/// <returns></returns>
|
|
public override object GetValue(int i)
|
|
{
|
|
if (!isOpen)
|
|
Throw(new Exception("No current query in data reader"));
|
|
if (i >= FieldCount)
|
|
Throw(new IndexOutOfRangeException());
|
|
|
|
IMySqlValue val = GetFieldValue(i, false);
|
|
if (val.IsNull)
|
|
return DBNull.Value;
|
|
|
|
// if the column is a date/time, then we return a MySqlDateTime
|
|
// so .ToString() will print '0000-00-00' correctly
|
|
if (val is MySqlDateTime)
|
|
{
|
|
MySqlDateTime dt = (MySqlDateTime)val;
|
|
if (!dt.IsValidDateTime && connection.Settings.ConvertZeroDateTime)
|
|
return DateTime.MinValue;
|
|
else if (connection.Settings.AllowZeroDateTime)
|
|
return val;
|
|
else
|
|
return dt.GetDateTime();
|
|
}
|
|
|
|
return val.Value;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets all attribute columns in the collection for the current row.
|
|
/// </summary>
|
|
/// <param name="values"></param>
|
|
/// <returns></returns>
|
|
public override int GetValues(object[] values)
|
|
{
|
|
int numCols = Math.Min(values.Length, FieldCount);
|
|
for (int i = 0; i < numCols; i++)
|
|
values[i] = GetValue(i);
|
|
|
|
return numCols;
|
|
}
|
|
|
|
public UInt16 GetUInt16(string column)
|
|
{
|
|
return GetUInt16(GetOrdinal(column));
|
|
}
|
|
|
|
public UInt16 GetUInt16(int column)
|
|
{
|
|
IMySqlValue v = GetFieldValue(column, true);
|
|
if (v is MySqlUInt16)
|
|
return ((MySqlUInt16)v).Value;
|
|
|
|
return (UInt16)ChangeType(v, column, typeof(UInt16));
|
|
}
|
|
|
|
public UInt32 GetUInt32(string column)
|
|
{
|
|
return GetUInt32(GetOrdinal(column));
|
|
}
|
|
|
|
public UInt32 GetUInt32(int column)
|
|
{
|
|
IMySqlValue v = GetFieldValue(column, true);
|
|
if (v is MySqlUInt32)
|
|
return ((MySqlUInt32)v).Value;
|
|
return (uint)ChangeType(v, column, typeof(UInt32));
|
|
}
|
|
|
|
public UInt64 GetUInt64(string column)
|
|
{
|
|
return GetUInt64(GetOrdinal(column));
|
|
}
|
|
|
|
public UInt64 GetUInt64(int column)
|
|
{
|
|
IMySqlValue v = GetFieldValue(column, true);
|
|
if (v is MySqlUInt64)
|
|
return ((MySqlUInt64)v).Value;
|
|
|
|
return (UInt64)ChangeType(v, column, typeof(UInt64));
|
|
}
|
|
|
|
|
|
#endregion
|
|
|
|
IDataReader IDataRecord.GetData(int i)
|
|
{
|
|
return base.GetData(i);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets a value indicating whether the column contains non-existent or missing values.
|
|
/// </summary>
|
|
/// <param name="i"></param>
|
|
/// <returns></returns>
|
|
public override bool IsDBNull(int i)
|
|
{
|
|
return DBNull.Value == GetValue(i);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Advances the data reader to the next result, when reading the results of batch SQL statements.
|
|
/// </summary>
|
|
/// <returns></returns>
|
|
public override bool NextResult()
|
|
{
|
|
if (!isOpen)
|
|
Throw(new MySqlException(Resources.NextResultIsClosed));
|
|
|
|
bool isCaching = command.CommandType == CommandType.TableDirect && command.EnableCaching &&
|
|
(commandBehavior & CommandBehavior.SequentialAccess) == 0;
|
|
|
|
// this will clear out any unread data
|
|
if (resultSet != null)
|
|
{
|
|
resultSet.Close();
|
|
if (isCaching)
|
|
TableCache.AddToCache(command.CommandText, resultSet);
|
|
}
|
|
|
|
// single result means we only return a single resultset. If we have already
|
|
// returned one, then we return false
|
|
// TableDirect is basically a select * from a single table so it will generate
|
|
// a single result also
|
|
if (resultSet != null &&
|
|
((commandBehavior & CommandBehavior.SingleResult) != 0 || isCaching))
|
|
return false;
|
|
|
|
// next load up the next resultset if any
|
|
try
|
|
{
|
|
do
|
|
{
|
|
resultSet = null;
|
|
// if we are table caching, then try to retrieve the resultSet from the cache
|
|
if (isCaching)
|
|
resultSet = TableCache.RetrieveFromCache(command.CommandText,
|
|
command.CacheAge);
|
|
|
|
if (resultSet == null)
|
|
{
|
|
resultSet = driver.NextResult(Statement.StatementId, false);
|
|
if (resultSet == null) return false;
|
|
if (resultSet.IsOutputParameters && command.CommandType == CommandType.StoredProcedure)
|
|
{
|
|
StoredProcedure sp = statement as StoredProcedure;
|
|
sp.ProcessOutputParameters(this);
|
|
resultSet.Close();
|
|
if (!sp.ServerProvidingOutputParameters) return false;
|
|
// if we are using server side output parameters then we will get our ok packet
|
|
// *after* the output parameters resultset
|
|
resultSet = driver.NextResult(Statement.StatementId, true);
|
|
}
|
|
resultSet.Cached = isCaching;
|
|
}
|
|
|
|
if (resultSet.Size == 0)
|
|
{
|
|
Command.lastInsertedId = resultSet.InsertedId;
|
|
if (affectedRows == -1)
|
|
affectedRows = resultSet.AffectedRows;
|
|
else
|
|
affectedRows += resultSet.AffectedRows;
|
|
}
|
|
} while (resultSet.Size == 0);
|
|
|
|
return true;
|
|
}
|
|
catch (MySqlException ex)
|
|
{
|
|
if (ex.IsFatal)
|
|
connection.Abort();
|
|
if (ex.Number == 0)
|
|
throw new MySqlException(Resources.FatalErrorReadingResult, ex);
|
|
if ((commandBehavior & CommandBehavior.CloseConnection) != 0)
|
|
Close();
|
|
throw;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Advances the MySqlDataReader to the next record.
|
|
/// </summary>
|
|
/// <returns></returns>
|
|
public override bool Read()
|
|
{
|
|
if (!isOpen)
|
|
Throw(new MySqlException("Invalid attempt to Read when reader is closed."));
|
|
if (resultSet == null)
|
|
return false;
|
|
|
|
try
|
|
{
|
|
return resultSet.NextRow(commandBehavior);
|
|
}
|
|
catch (TimeoutException tex)
|
|
{
|
|
connection.HandleTimeoutOrThreadAbort(tex);
|
|
throw; // unreached
|
|
}
|
|
catch (ThreadAbortException taex)
|
|
{
|
|
connection.HandleTimeoutOrThreadAbort(taex);
|
|
throw;
|
|
}
|
|
catch (MySqlException ex)
|
|
{
|
|
if (ex.IsFatal)
|
|
connection.Abort();
|
|
|
|
if (ex.IsQueryAborted)
|
|
{
|
|
throw;
|
|
}
|
|
|
|
throw new MySqlException(Resources.FatalErrorDuringRead, ex);
|
|
}
|
|
}
|
|
|
|
|
|
private IMySqlValue GetFieldValue(int index, bool checkNull)
|
|
{
|
|
if (index < 0 || index >= FieldCount)
|
|
Throw(new ArgumentException(Resources.InvalidColumnOrdinal));
|
|
|
|
IMySqlValue v = resultSet[index];
|
|
|
|
if (checkNull && v.IsNull)
|
|
throw new System.Data.SqlTypes.SqlNullValueException();
|
|
|
|
return v;
|
|
}
|
|
|
|
|
|
private void ClearKillFlag()
|
|
{
|
|
// This query will silently crash because of the Kill call that happened before.
|
|
string dummyStatement = "SELECT * FROM bogus_table LIMIT 0"; /* dummy query used to clear kill flag */
|
|
MySqlCommand dummyCommand = new MySqlCommand(dummyStatement, connection);
|
|
dummyCommand.InternallyCreated = true;
|
|
try
|
|
{
|
|
dummyCommand.ExecuteReader(); // ExecuteReader catches the exception and returns null, which is expected.
|
|
}
|
|
catch (MySqlException ex)
|
|
{
|
|
if (ex.Number != (int)MySqlErrorCode.NoSuchTable) throw;
|
|
}
|
|
}
|
|
|
|
private void ProcessOutputParameters()
|
|
{
|
|
// if we are not 5.5 or later or we are not prepared then we are simulating output parameters
|
|
// with user variables and they are also string so we have to work some magic with out
|
|
// column types before we read the data
|
|
if (!driver.SupportsOutputParameters || !command.IsPrepared)
|
|
AdjustOutputTypes();
|
|
|
|
// now read the output parameters data row
|
|
if ((commandBehavior & CommandBehavior.SchemaOnly) != 0) return;
|
|
resultSet.NextRow(commandBehavior);
|
|
|
|
string prefix = "@" + StoredProcedure.ParameterPrefix;
|
|
|
|
for (int i = 0; i < FieldCount; i++)
|
|
{
|
|
string fieldName = GetName(i);
|
|
if (fieldName.StartsWith(prefix))
|
|
fieldName = fieldName.Remove(0, prefix.Length);
|
|
MySqlParameter parameter = command.Parameters.GetParameterFlexible(fieldName, true);
|
|
parameter.Value = GetValue(i);
|
|
}
|
|
}
|
|
|
|
private void AdjustOutputTypes()
|
|
{
|
|
// 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 < FieldCount; i++)
|
|
{
|
|
string fieldName = GetName(i);
|
|
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;
|
|
resultSet.SetValueObject(i, bit);
|
|
}
|
|
else
|
|
resultSet.SetValueObject(i, v);
|
|
}
|
|
}
|
|
|
|
private void Throw(Exception ex)
|
|
{
|
|
if (connection != null)
|
|
connection.Throw(ex);
|
|
throw ex;
|
|
}
|
|
|
|
public new void Dispose()
|
|
{
|
|
Dispose(true);
|
|
GC.SuppressFinalize(this);
|
|
}
|
|
|
|
protected override void Dispose(bool disposing)
|
|
{
|
|
if (disposed)
|
|
return;
|
|
|
|
Close();
|
|
|
|
base.Dispose(disposing);
|
|
disposed = true;
|
|
}
|
|
|
|
#region Destructor
|
|
~MySqlDataReader()
|
|
{
|
|
Dispose(false);
|
|
}
|
|
#endregion
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|