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diff --git a/sql/sql_alter.h b/sql/sql_alter.h
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+/* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
+
+   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 */
+
+#ifndef SQL_ALTER_TABLE_H
+#define SQL_ALTER_TABLE_H
+
+/**
+  Alter_table_common represents the common properties of the ALTER TABLE
+  statements.
+  @todo move Alter_info and other ALTER generic structures from Lex here.
+*/
+class Alter_table_common : public Sql_statement
+{
+protected:
+  /**
+    Constructor.
+    @param lex the LEX structure for this statement.
+  */
+  Alter_table_common(LEX *lex)
+    : Sql_statement(lex)
+  {}
+
+  virtual ~Alter_table_common()
+  {}
+
+};
+
+/**
+  Alter_table_statement represents the generic ALTER TABLE statement.
+  @todo move Alter_info and other ALTER specific structures from Lex here.
+*/
+class Alter_table_statement : public Alter_table_common
+{
+public:
+  /**
+    Constructor, used to represent a ALTER TABLE statement.
+    @param lex the LEX structure for this statement.
+  */
+  Alter_table_statement(LEX *lex)
+    : Alter_table_common(lex)
+  {}
+
+  ~Alter_table_statement()
+  {}
+
+  /**
+    Execute a ALTER TABLE statement at runtime.
+    @param thd the current thread.
+    @return false on success.
+  */
+  bool execute(THD *thd);
+};
+
+#endif