← Back to branch summary

~drizzle-trunk/drizzle/development

« back to all changes in this revision

Viewing changes to drizzled/item/ident.cc

  • Committer: Eric Herman
  • Date: 2008-12-06 22:37:37 UTC
  • mfrom: (656.1.6 devel)
  • mto: (656.1.8 devel)
  • mto: This revision was merged to the branch mainline in revision 665.
  • Revision ID: eric@mysql.com-20081206223737-viem01l5uhm0w14r
merged from lp:drizzle/mordred

Show diffs side-by-side

added added

removed removed

Lines of Context:
drizzled/item/ident.cc
 
1
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 
2
 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 
3
 *
 
4
 *  Copyright (C) 2008 Sun Microsystems
 
5
 *
 
6
 *  This program is free software; you can redistribute it and/or modify
 
7
 *  it under the terms of the GNU General Public License as published by
 
8
 *  the Free Software Foundation; version 2 of the License.
 
9
 *
 
10
 *  This program is distributed in the hope that it will be useful,
 
11
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 
12
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
13
 *  GNU General Public License for more details.
 
14
 *
 
15
 *  You should have received a copy of the GNU General Public License
 
16
 *  along with this program; if not, write to the Free Software
 
17
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
18
 */
 
19
 
 
20
#include <drizzled/server_includes.h>
 
21
#include CSTDINT_H
 
22
#include <drizzled/show.h>
 
23
#include <drizzled/table.h>
 
24
#include <drizzled/item/ident.h>
 
25
 
 
26
const uint32_t NO_CACHED_FIELD_INDEX= UINT32_MAX;
 
27
 
 
28
Item_ident::Item_ident(Name_resolution_context *context_arg,
 
29
                       const char *db_name_arg,const char *table_name_arg,
 
30
                       const char *field_name_arg)
 
31
  :orig_db_name(db_name_arg), orig_table_name(table_name_arg),
 
32
   orig_field_name(field_name_arg), context(context_arg),
 
33
   db_name(db_name_arg), table_name(table_name_arg),
 
34
   field_name(field_name_arg),
 
35
   alias_name_used(false), cached_field_index(NO_CACHED_FIELD_INDEX),
 
36
   cached_table(0), depended_from(0)
 
37
{
 
38
  name = (char*) field_name_arg;
 
39
}
 
40
 
 
41
/**
 
42
  Constructor used by Item_field & Item_*_ref (see Item comment)
 
43
*/
 
44
 
 
45
Item_ident::Item_ident(Session *session, Item_ident *item)
 
46
  :Item(session, item),
 
47
   orig_db_name(item->orig_db_name),
 
48
   orig_table_name(item->orig_table_name),
 
49
   orig_field_name(item->orig_field_name),
 
50
   context(item->context),
 
51
   db_name(item->db_name),
 
52
   table_name(item->table_name),
 
53
   field_name(item->field_name),
 
54
   alias_name_used(item->alias_name_used),
 
55
   cached_field_index(item->cached_field_index),
 
56
   cached_table(item->cached_table),
 
57
   depended_from(item->depended_from)
 
58
{}
 
59
 
 
60
void Item_ident::cleanup()
 
61
{
 
62
#ifdef CANT_BE_USED_AS_MEMORY_IS_FREED
 
63
                       db_name ? db_name : "(null)",
 
64
                       orig_db_name ? orig_db_name : "(null)",
 
65
                       table_name ? table_name : "(null)",
 
66
                       orig_table_name ? orig_table_name : "(null)",
 
67
                       field_name ? field_name : "(null)",
 
68
                       orig_field_name ? orig_field_name : "(null)"));
 
69
#endif
 
70
  Item::cleanup();
 
71
  db_name= orig_db_name;
 
72
  table_name= orig_table_name;
 
73
  field_name= orig_field_name;
 
74
  depended_from= 0;
 
75
  return;
 
76
}
 
77
 
 
78
bool Item_ident::remove_dependence_processor(unsigned char * arg)
 
79
{
 
80
  if (depended_from == (st_select_lex *) arg)
 
81
    depended_from= 0;
 
82
  return(0);
 
83
}
 
84
 
 
85
const char *Item_ident::full_name() const
 
86
{
 
87
  char *tmp;
 
88
  if (!table_name || !field_name)
 
89
    return field_name ? field_name : name ? name : "tmp_field";
 
90
  if (db_name && db_name[0])
 
91
  {
 
92
    tmp=(char*) sql_alloc((uint) strlen(db_name)+(uint) strlen(table_name)+
 
93
                          (uint) strlen(field_name)+3);
 
94
    strxmov(tmp,db_name,".",table_name,".",field_name,NULL);
 
95
  }
 
96
  else
 
97
  {
 
98
    if (table_name[0])
 
99
    {
 
100
      tmp= (char*) sql_alloc((uint) strlen(table_name) +
 
101
                             (uint) strlen(field_name) + 2);
 
102
      strxmov(tmp, table_name, ".", field_name, NULL);
 
103
    }
 
104
    else
 
105
      tmp= (char*) field_name;
 
106
  }
 
107
  return tmp;
 
108
}
 
109
 
 
110
 
 
111
void Item_ident::print(String *str,
 
112
                       enum_query_type)
 
113
{
 
114
  Session *session= current_session;
 
115
  char d_name_buff[MAX_ALIAS_NAME], t_name_buff[MAX_ALIAS_NAME];
 
116
  const char *d_name= db_name, *t_name= table_name;
 
117
  if (lower_case_table_names== 1 ||
 
118
      (lower_case_table_names == 2 && !alias_name_used))
 
119
  {
 
120
    if (table_name && table_name[0])
 
121
    {
 
122
      strcpy(t_name_buff, table_name);
 
123
      my_casedn_str(files_charset_info, t_name_buff);
 
124
      t_name= t_name_buff;
 
125
    }
 
126
    if (db_name && db_name[0])
 
127
    {
 
128
      strcpy(d_name_buff, db_name);
 
129
      my_casedn_str(files_charset_info, d_name_buff);
 
130
      d_name= d_name_buff;
 
131
    }
 
132
  }
 
133
 
 
134
  if (!table_name || !field_name || !field_name[0])
 
135
  {
 
136
    const char *nm= (field_name && field_name[0]) ?
 
137
                      field_name : name ? name : "tmp_field";
 
138
    append_identifier(session, str, nm, (uint) strlen(nm));
 
139
    return;
 
140
  }
 
141
  if (db_name && db_name[0] && !alias_name_used)
 
142
  {
 
143
    {
 
144
      append_identifier(session, str, d_name, (uint)strlen(d_name));
 
145
      str->append('.');
 
146
    }
 
147
    append_identifier(session, str, t_name, (uint)strlen(t_name));
 
148
    str->append('.');
 
149
    append_identifier(session, str, field_name, (uint)strlen(field_name));
 
150
  }
 
151
  else
 
152
  {
 
153
    if (table_name[0])
 
154
    {
 
155
      append_identifier(session, str, t_name, (uint) strlen(t_name));
 
156
      str->append('.');
 
157
      append_identifier(session, str, field_name, (uint) strlen(field_name));
 
158
    }
 
159
    else
 
160
      append_identifier(session, str, field_name, (uint) strlen(field_name));
 
161
  }
 
162
}
 
163
 
 
164
double Item_ident_for_show::val_real()
 
165
{
 
166
  return field->val_real();
 
167
}
 
168
 
 
169
 
 
170
int64_t Item_ident_for_show::val_int()
 
171
{
 
172
  return field->val_int();
 
173
}
 
174
 
 
175
 
 
176
String *Item_ident_for_show::val_str(String *str)
 
177
{
 
178
  return field->val_str(str);
 
179
}
 
180
 
 
181
 
 
182
my_decimal *Item_ident_for_show::val_decimal(my_decimal *dec)
 
183
{
 
184
  return field->val_decimal(dec);
 
185
}
 
186
 
 
187
void Item_ident_for_show::make_field(Send_field *tmp_field)
 
188
{
 
189
  tmp_field->table_name= tmp_field->org_table_name= table_name;
 
190
  tmp_field->db_name= db_name;
 
191
  tmp_field->col_name= tmp_field->org_col_name= field->field_name;
 
192
  tmp_field->charsetnr= field->charset()->number;
 
193
  tmp_field->length=field->field_length;
 
194
  tmp_field->type=field->type();
 
195
  tmp_field->flags= field->table->maybe_null ?
 
196
    (field->flags & ~NOT_NULL_FLAG) : field->flags;
 
197
  tmp_field->decimals= field->decimals();
 
198
}
 
199