Drizzled Public API Documentation

hp_extra.cc
1 /* Copyright (C) 2000-2001, 2004 MySQL AB
2 
3  This program is free software; you can redistribute it and/or modify
4  it under the terms of the GNU General Public License as published by
5  the Free Software Foundation; version 2 of the License.
6 
7  This program is distributed in the hope that it will be useful,
8  but WITHOUT ANY WARRANTY; without even the implied warranty of
9  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  GNU General Public License for more details.
11 
12  You should have received a copy of the GNU General Public License
13  along with this program; if not, write to the Free Software
14  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
15 
16 /* Extra functions we want to do with a database */
17 /* - Set flags for quicker databasehandler */
18 /* - Set databasehandler to normal */
19 /* - Reset recordpointers as after open database */
20 
21 #include "heap_priv.h"
22 
23 using namespace drizzled;
24 
25 static void heap_extra_keyflag(register HP_INFO *info,
26  enum ha_extra_function function);
27 
28 
29  /* set extra flags for database */
30 
31 int heap_extra(register HP_INFO *info, enum ha_extra_function function)
32 {
33  switch (function) {
34  case HA_EXTRA_RESET_STATE:
35  heap_reset(info);
36  case HA_EXTRA_NO_READCHECK:
37  info->opt_flag&= ~READ_CHECK_USED; /* No readcheck */
38  break;
39  case HA_EXTRA_READCHECK:
40  info->opt_flag|= READ_CHECK_USED;
41  break;
42  case HA_EXTRA_CHANGE_KEY_TO_UNIQUE:
43  case HA_EXTRA_CHANGE_KEY_TO_DUP:
44  heap_extra_keyflag(info, function);
45  break;
46  default:
47  break;
48  }
49  return(0);
50 } /* heap_extra */
51 
52 
53 int heap_reset(HP_INFO *info)
54 {
55  info->lastinx= -1;
56  info->current_record= UINT32_MAX;
57  info->current_hash_ptr=0;
58  info->update=0;
59  info->next_block=0;
60  return 0;
61 }
62 
63 
64 /*
65  Start/Stop Inserting Duplicates Into a Table, WL#1648.
66  */
67 static void heap_extra_keyflag(register HP_INFO *info,
68  enum ha_extra_function function)
69 {
70  for (uint32_t idx= 0; idx< info->getShare()->keys; idx++)
71  {
72  switch (function) {
73  case HA_EXTRA_CHANGE_KEY_TO_UNIQUE:
74  info->getShare()->keydef[idx].flag|= HA_NOSAME;
75  break;
76  case HA_EXTRA_CHANGE_KEY_TO_DUP:
77  info->getShare()->keydef[idx].flag&= ~(HA_NOSAME);
78  break;
79  default:
80  break;
81  }
82  }
83 }
TODO: Rename this file - func.h is stupid.