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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems
*
* 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
*/
#ifndef DRIZZLED_FUNCTION_NUMHYBRID_H
#define DRIZZLED_FUNCTION_NUMHYBRID_H
#include <drizzled/function/func.h>
class Item_func_numhybrid: public Item_func
{
protected:
Item_result hybrid_type;
public:
Item_func_numhybrid(Item *a) :Item_func(a), hybrid_type(REAL_RESULT)
{}
Item_func_numhybrid(Item *a,Item *b)
:Item_func(a,b), hybrid_type(REAL_RESULT)
{}
Item_func_numhybrid(List<Item> &list)
:Item_func(list), hybrid_type(REAL_RESULT)
{}
enum Item_result result_type () const { return hybrid_type; }
void fix_length_and_dec();
void fix_num_length_and_dec();
virtual void find_num_type()= 0; /* To be called from fix_length_and_dec */
double val_real();
int64_t val_int();
my_decimal *val_decimal(my_decimal *);
String *val_str(String*str);
/**
@brief Performs the operation that this functions implements when the
result type is INT.
@return The result of the operation.
*/
virtual int64_t int_op()= 0;
/**
@brief Performs the operation that this functions implements when the
result type is REAL.
@return The result of the operation.
*/
virtual double real_op()= 0;
/**
@brief Performs the operation that this functions implements when the
result type is DECIMAL.
@param A pointer where the DECIMAL value will be allocated.
@return
- 0 If the result is NULL
- The same pointer it was given, with the area initialized to the
result of the operation.
*/
virtual my_decimal *decimal_op(my_decimal *)= 0;
/**
@brief Performs the operation that this functions implements when the
result type is a string type.
@return The result of the operation.
*/
virtual String *str_op(String *)= 0;
bool is_null() { update_null_value(); return null_value; }
};
#endif /* DRIZZLED_FUNCTION_NUMHYBRID_H */
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