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// Copyright (c) 2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
//
// MySQL Connector/NET is licensed under the terms of the GPLv2
// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
// MySQL Connectors. There are special exceptions to the terms and
// conditions of the GPLv2 as it is applied to this software, see the
// FLOSS License Exception
// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published
// by the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
using System;
using System.Text;
using System.Data.Common.CommandTrees;
using System.Data.Metadata.Edm;
using MySql.Data.MySqlClient;
using System.Collections.Generic;
namespace MySql.Data.Entity
{
class UpdateGenerator : SqlGenerator
{
public override string GenerateSQL(DbCommandTree tree)
{
DbUpdateCommandTree commandTree = tree as DbUpdateCommandTree;
UpdateStatement statement = new UpdateStatement();
//scope.Push(commandTree.Target.VariableName);
statement.Target = commandTree.Target.Expression.Accept(this);
foreach (DbSetClause setClause in commandTree.SetClauses)
{
statement.Properties.Add(setClause.Property.Accept(this));
DbExpression value = setClause.Value;
SqlFragment valueFragment = value.Accept(this);
statement.Values.Add(valueFragment);
if (values == null)
values = new Dictionary<EdmMember, SqlFragment>();
if (value.ExpressionKind != DbExpressionKind.Null)
{
EdmMember property = ((DbPropertyExpression)setClause.Property).Property;
values.Add(property, valueFragment);
}
}
statement.Where = commandTree.Predicate.Accept(this);
if (commandTree.Returning != null)
statement.ReturningSelect = GenerateReturningSql(commandTree, commandTree.Returning);
return statement.ToString();
}
}
}
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