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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()
+ {}
+
+ /**
+ 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()
+ {}
+
+ 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()
+ {}
+
+ virtual enum_sql_command sql_command_code() const
+ {
+ return SQLCOM_RESIGNAL;
+ }
+
+ virtual bool execute(THD *thd);
+};
+
+#endif
+