Drizzled Public API Documentation

decimal.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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17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #pragma once
21 
22 #include <drizzled/item/num.h>
23 
24 namespace drizzled {
25 
26 /* decimal (fixed point) constant */
27 class Item_decimal : public Item_num
28 {
29 protected:
30  type::Decimal decimal_value;
31 public:
32  Item_decimal(const char *str_arg, uint32_t length, const charset_info_st*);
33  Item_decimal(const char *str, const type::Decimal *val_arg, uint32_t decimal_par, uint32_t length);
34  Item_decimal(type::Decimal *value_par);
35  Item_decimal(int64_t val, bool unsig);
36  Item_decimal(double val, int precision, int scale);
37  Item_decimal(const unsigned char *bin, int precision, int scale);
38 
39  enum Type type() const { return DECIMAL_ITEM; }
40  enum Item_result result_type () const { return DECIMAL_RESULT; }
41  enum_field_types field_type() const { return DRIZZLE_TYPE_DECIMAL; }
42  int64_t val_int();
43  double val_real();
46  { return &decimal_value; }
47  int save_in_field(Field *field, bool no_conversions);
48  bool basic_const_item() const { return true; }
49  Item *clone_item()
50  {
51  return new Item_decimal(name, &decimal_value, decimals, max_length);
52  }
53  virtual void print(String *str);
54  Item_num *neg()
55  {
56  class_decimal_neg(&decimal_value);
57  unsigned_flag= !decimal_value.sign();
58  return this;
59  }
60  uint32_t decimal_precision() const { return decimal_value.precision(); }
61  bool eq(const Item *, bool binary_cmp) const;
62  void set_decimal_value(type::Decimal *value_par);
63 };
64 
65 } /* namespace drizzled */
66