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diff --git a/sql/sql_signal.h b/sql/sql_signal.h
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+/* Copyright (c) 2008 MySQL AB, 2009 Sun Microsystems, Inc.
+   Use is subject to license terms.
+
+   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 02110-1335  USA */
+
+#ifndef SQL_SIGNAL_H
+#define SQL_SIGNAL_H
+
+/**
+  Sql_cmd_common_signal represents the common properties of the
+  SIGNAL and RESIGNAL statements.
+*/
+class Sql_cmd_common_signal : public Sql_cmd
+{
+protected:
+  /**
+    Constructor.
+    @param cond the condition signaled if any, or NULL.
+    @param set collection of signal condition item assignments.
+  */
+  Sql_cmd_common_signal(const sp_condition_value *cond,
+                        const Set_signal_information& set)
+    : Sql_cmd(),
+      m_cond(cond),
+      m_set_signal_information(set)
+  {}
+
+  virtual ~Sql_cmd_common_signal() = default;
+
+  /**
+    Evaluate each signal condition items for this statement.
+    @param thd the current thread.
+    @param cond the condition to update.
+    @return 0 on success.
+  */
+  int eval_signal_informations(THD *thd, Sql_condition *cond);
+
+  /**
+    Raise a SQL condition.
+    @param thd the current thread.
+    @param cond the condition to raise.
+    @return false on success.
+  */
+  bool raise_condition(THD *thd, Sql_condition *cond);
+
+  /**
+    The condition to signal or resignal.
+    This member is optional and can be NULL (RESIGNAL).
+  */
+  const sp_condition_value *m_cond;
+
+  /**
+    Collection of 'SET item = value' assignments in the
+    SIGNAL/RESIGNAL statement.
+  */
+  Set_signal_information m_set_signal_information;
+};
+
+/**
+  Sql_cmd_signal represents a SIGNAL statement.
+*/
+class Sql_cmd_signal : public Sql_cmd_common_signal
+{
+public:
+  /**
+    Constructor, used to represent a SIGNAL statement.
+    @param cond the SQL condition to signal (required).
+    @param set the collection of signal information to signal.
+  */
+  Sql_cmd_signal(const sp_condition_value *cond,
+                 const Set_signal_information& set)
+    : Sql_cmd_common_signal(cond, set)
+  {}
+
+  virtual ~Sql_cmd_signal() = default;
+
+  virtual enum_sql_command sql_command_code() const
+  {
+    return SQLCOM_SIGNAL;
+  }
+
+  virtual bool execute(THD *thd);
+};
+
+/**
+  Sql_cmd_resignal represents a RESIGNAL statement.
+*/
+class Sql_cmd_resignal : public Sql_cmd_common_signal
+{
+public:
+  /**
+    Constructor, used to represent a RESIGNAL statement.
+    @param cond the SQL condition to resignal (optional, may be NULL).
+    @param set the collection of signal information to resignal.
+  */
+  Sql_cmd_resignal(const sp_condition_value *cond,
+                   const Set_signal_information& set)
+    : Sql_cmd_common_signal(cond, set)
+  {}
+
+  virtual ~Sql_cmd_resignal() = default;
+
+  virtual enum_sql_command sql_command_code() const
+  {
+    return SQLCOM_RESIGNAL;
+  }
+
+  virtual bool execute(THD *thd);
+};
+
+#endif
+