Drizzled Public API Documentation

numhybrid.h
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
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6  * This program is free software; you can redistribute it and/or modify
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8  * the Free Software Foundation; version 2 of the License.
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13  * GNU General Public License for more details.
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15  * You should have received a copy of the GNU General Public License
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17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #pragma once
21 
22 #include <drizzled/function/func.h>
23 
24 namespace drizzled
25 {
26 
28 {
29 protected:
30  Item_result hybrid_type;
31 public:
32  Item_func_numhybrid(): Item_func(), hybrid_type(REAL_RESULT)
33  {}
34  Item_func_numhybrid(Item *a) :Item_func(a), hybrid_type(REAL_RESULT)
35  {}
37  :Item_func(a,b), hybrid_type(REAL_RESULT)
38  {}
40  :Item_func(list), hybrid_type(REAL_RESULT)
41  {}
42 
43  enum Item_result result_type () const { return hybrid_type; }
44  void fix_length_and_dec();
45  void fix_num_length_and_dec();
46  virtual void find_num_type()= 0; /* To be called from fix_length_and_dec */
47 
48  double val_real();
49  int64_t val_int();
51  String *val_str(String*str);
52 
59  virtual int64_t int_op()= 0;
60 
67  virtual double real_op()= 0;
68 
79  virtual type::Decimal *decimal_op(type::Decimal *)= 0;
80 
87  virtual String *str_op(String *)= 0;
88  bool is_null() { update_null_value(); return null_value; }
89 };
90 
91 } /* namespace drizzled */
92