create.h

/* -*- 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
 */

/* Functions to create an item. Used by sql/sql_yacc.yy */

#pragma once

#include <drizzled/item/func.h>
#include <drizzled/plugin/function.h>

namespace drizzled {

class Create_func
{
public:
  virtual Item *create(Session*, str_ref name, List<Item> *item_list) = 0;

protected:
  virtual ~Create_func() {}
};

class Create_qfunc : public Create_func
{
public:
  virtual Item *create(Session*, str_ref name, List<Item> *item_list);

  virtual Item* create(Session*, str_ref db, str_ref name, bool use_explicit_name, List<Item>*) = 0;
};


extern Create_func* find_native_function_builder(str_ref name);


extern Create_qfunc* find_qualified_function_builder(Session*);


class Create_udf_func : public Create_func
{
public:
  virtual Item *create(Session*, str_ref name, List<Item> *item_list);

  Item *create(Session*, const plugin::Function *fct, List<Item> *item_list);

  static Create_udf_func s_singleton;

protected:
  Create_udf_func() {}
};

Item*
create_func_char_cast(Session*, Item *a, int len, const charset_info_st * const cs);

Item *
create_func_cast(Session*, Item *a, Cast_target cast_type, const char *len, const char *dec, const charset_info_st*);

void item_create_init();
void item_create_cleanup();

} /* namespace drizzled */