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