Drizzled Public API Documentation

date.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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13  * GNU General Public License for more details.
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19 
20 #pragma once
21 
22 #include <drizzled/function/func.h>
23 #include <drizzled/function/str/strfunc.h>
24 #include <drizzled/temporal.h>
25 
26 namespace drizzled
27 {
28 
29 /* A function which evaluates to a Date */
30 class Item_date :public Item_func
31 {
32 public:
33  using Item_func::tmp_table_field;
34 
35  Item_date() :Item_func() {}
36  Item_date(Item *a) :Item_func(a) {}
37  enum Item_result result_type () const { return STRING_RESULT; }
38  enum_field_types field_type() const { return DRIZZLE_TYPE_DATE; }
39  String *val_str(String *str);
40  int64_t val_int();
41  double val_real() { return val_real_from_decimal(); }
42  const char *func_name() const { return "date"; }
43  void fix_length_and_dec()
44  {
45  collation.set(&my_charset_bin);
46  decimals=0;
47  max_length=Date::MAX_STRING_LENGTH*MY_CHARSET_BIN_MB_MAXLEN;
48  }
60  virtual bool get_temporal(Date &temporal)= 0;
61  Field *tmp_table_field(Table *table)
62  {
63  return tmp_table_field_from_field_type(table, 0);
64  }
65  bool result_as_int64_t() { return true; }
67  {
68  assert(fixed == 1);
69  return val_decimal_from_date(decimal_value);
70  }
71  int save_in_field(Field *field,
72  bool )
73  {
74  return save_date_in_field(field);
75  }
76 };
77 
79 {
80 public:
83  Item_date_func(Item *a,Item *b) :Item_str_func(a,b) {}
84  Item_date_func(Item *a,Item *b, Item *c) :Item_str_func(a,b,c) {}
85  enum_field_types field_type() const { return DRIZZLE_TYPE_DATETIME; }
86 
87  using Item_func::tmp_table_field;
88  Field *tmp_table_field(Table *table)
89  {
90  return tmp_table_field_from_field_type(table, 0);
91  }
92  bool result_as_int64_t() { return true; }
93  double val_real() { return (double) val_int(); }
95  {
96  assert(fixed == 1);
97  return val_decimal_from_date(decimal_value);
98  }
99  int save_in_field(Field *field,
100  bool )
101  {
102  return save_date_in_field(field);
103  }
104 };
105 
106 } /* namespace drizzled */
107