1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*****************************************************************************
Copyright (c) 1996, 2015, Oracle and/or its affiliates. All Rights Reserved.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
*****************************************************************************/
/********************************************************************//**
@file include/btr0types.h
The index tree general types
Created 2/17/1996 Heikki Tuuri
*************************************************************************/
#ifndef btr0types_h
#define btr0types_h
#include "univ.i"
#include "rem0types.h"
#include "page0types.h"
#include "sync0rw.h"
#include "page0size.h"
/** Persistent cursor */
struct btr_pcur_t;
/** B-tree cursor */
struct btr_cur_t;
/** B-tree search information for the adaptive hash index */
struct btr_search_t;
/** Is search system enabled.
Search system is protected by array of latches. */
extern char btr_search_enabled;
/** Number of adaptive hash index partition. */
extern ulong btr_ahi_parts;
/** The size of a reference to data stored on a different page.
The reference is stored at the end of the prefix of the field
in the index record. */
#define BTR_EXTERN_FIELD_REF_SIZE FIELD_REF_SIZE
/** If the data don't exceed the size, the data are stored locally. */
#define BTR_EXTERN_LOCAL_STORED_MAX_SIZE \
(BTR_EXTERN_FIELD_REF_SIZE * 2)
/** The information is used for creating a new index tree when
applying TRUNCATE log record during recovery */
struct btr_create_t {
explicit btr_create_t(const byte* const ptr)
:
format_flags(),
n_fields(),
field_len(),
fields(ptr),
trx_id_pos(ULINT_UNDEFINED)
{
/* Do nothing */
}
/** Page format */
ulint format_flags;
/** Numbr of index fields */
ulint n_fields;
/** The length of the encoded meta-data */
ulint field_len;
/** Field meta-data, encoded. */
const byte* const fields;
/** Position of trx-id column. */
ulint trx_id_pos;
};
#endif
|
