~drizzle-trunk/drizzle/development

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2008 Sun Microsystems, Inc.

 *

 *  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

 */

#include <config.h>

#include <drizzled/function/math/int.h>

#include <drizzled/plugin/function.h>

#include <drizzled/session.h>

#include <drizzled/system_variables.h>

using namespace std;

using namespace drizzled;

class ConnectionIdFunction :public Item_int_func

{

  int64_t value;

public:

  ConnectionIdFunction() :Item_int_func() {}

  int64_t val_int() 

  {

    assert(fixed == true);

    return value;

  }

  const char *func_name() const 

  { 

    return "connection_id"; 

  }

  void fix_length_and_dec() 

  {

    Item_int_func::fix_length_and_dec();

    max_length= 10;

  }

  bool fix_fields(Session *session, Item **ref)

  {

    if (Item_int_func::fix_fields(session, ref))

    {

      return true;

    }

    value= session->variables.pseudo_thread_id;

    return false;

  }

  bool check_argument_count(int n)

  {

    return (n == 0);

  }

};

plugin::Create_function<ConnectionIdFunction> *connection_idudf= NULL;

static int initialize(module::Context &context)

{

  connection_idudf=

    new plugin::Create_function<ConnectionIdFunction>("connection_id");

  context.add(connection_idudf);

  return 0;

}

DRIZZLE_DECLARE_PLUGIN

{

  DRIZZLE_VERSION_ID,

  "connection_id",

  "1.0",

  "Devananda van der Veen",

  "Return the current connection_id",

  PLUGIN_LICENSE_GPL,

  initialize, /* Plugin Init */

  NULL,   /* depends */

  NULL    /* config options */

}

DRIZZLE_DECLARE_PLUGIN_END;