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Edit File : sql_signal.h \| Size : 3.28 KB
/* 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 Back

Edit File : sql_signal.h | Size : 3.28 KB

/* 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

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