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
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/* Copyright (c) 2000, 2002-2007 MySQL AB
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, Fifth Floor, Boston, MA 02110-1301, USA */
/* Check that heap-structure is ok */
#include "heapdef.h"
static int check_one_key(HP_KEYDEF *keydef, uint keynr, ulong records,
ulong blength, my_bool print_status);
static int check_one_rb_key(HP_INFO *info, uint keynr, ulong records,
my_bool print_status);
/*
Check if keys and rows are ok in a heap table
SYNOPSIS
heap_check_heap()
info Table handler
print_status Prints some extra status
NOTES
Doesn't change the state of the table handler
RETURN VALUES
0 ok
1 error
*/
int heap_check_heap(HP_INFO *info, my_bool print_status)
{
int error;
uint key;
ulong records=0, deleted=0, pos, next_block;
HP_SHARE *share=info->s;
HP_INFO save_info= *info; /* Needed because scan_init */
DBUG_ENTER("heap_check_heap");
for (error=key= 0 ; key < share->keys ; key++)
{
if (share->keydef[key].algorithm == HA_KEY_ALG_BTREE)
error|= check_one_rb_key(info, key, share->records, print_status);
else
error|= check_one_key(share->keydef + key, key, share->records,
share->blength, print_status);
}
/*
This is basicly the same code as in hp_scan, but we repeat it here to
get shorter DBUG log file.
*/
for (pos=next_block= 0 ; ; pos++)
{
if (pos < next_block)
{
info->current_ptr+= share->block.recbuffer;
}
else
{
next_block+= share->block.records_in_block;
if (next_block >= share->records+share->deleted)
{
next_block= share->records+share->deleted;
if (pos >= next_block)
break; /* End of file */
}
}
hp_find_record(info,pos);
if (!info->current_ptr[share->reclength])
deleted++;
else
records++;
}
if (records != share->records || deleted != share->deleted)
{
DBUG_PRINT("error",("Found rows: %lu (%lu) deleted %lu (%lu)",
records, (ulong) share->records,
deleted, (ulong) share->deleted));
error= 1;
}
*info= save_info;
DBUG_RETURN(error);
}
static int check_one_key(HP_KEYDEF *keydef, uint keynr, ulong records,
ulong blength, my_bool print_status)
{
int error;
ulong i,found,max_links,seek,links;
ulong rec_link; /* Only used with debugging */
ulong hash_buckets_found;
HASH_INFO *hash_info;
error=0;
hash_buckets_found= 0;
for (i=found=max_links=seek=0 ; i < records ; i++)
{
hash_info=hp_find_hash(&keydef->block,i);
if (hp_mask(hp_rec_hashnr(keydef, hash_info->ptr_to_rec),
blength,records) == i)
{
found++;
seek++;
links=1;
while ((hash_info=hash_info->next_key) && found < records + 1)
{
seek+= ++links;
if ((rec_link = hp_mask(hp_rec_hashnr(keydef, hash_info->ptr_to_rec),
blength, records))
!= i)
{
DBUG_PRINT("error",
("Record in wrong link: Link %lu Record: 0x%lx Record-link %lu",
i, (long) hash_info->ptr_to_rec, rec_link));
error=1;
}
else
found++;
}
if (links > max_links) max_links=links;
hash_buckets_found++;
}
}
if (found != records)
{
DBUG_PRINT("error",("Found %ld of %ld records", found, records));
error=1;
}
if (keydef->hash_buckets != hash_buckets_found)
{
DBUG_PRINT("error",("Found %ld buckets, stats shows %ld buckets",
hash_buckets_found, (long) keydef->hash_buckets));
error=1;
}
DBUG_PRINT("info",
("records: %ld seeks: %lu max links: %lu hitrate: %.2f "
"buckets: %lu",
records,seek,max_links,
(float) seek / (float) (records ? records : 1),
hash_buckets_found));
if (print_status)
printf("Key: %d records: %ld seeks: %lu max links: %lu "
"hitrate: %.2f buckets: %lu\n",
keynr, records, seek, max_links,
(float) seek / (float) (records ? records : 1),
hash_buckets_found);
return error;
}
static int check_one_rb_key(HP_INFO *info, uint keynr, ulong records,
my_bool print_status)
{
HP_KEYDEF *keydef= info->s->keydef + keynr;
int error= 0;
ulong found= 0;
uchar *key, *recpos;
uint key_length;
uint not_used[2];
if ((key= tree_search_edge(&keydef->rb_tree, info->parents,
&info->last_pos, offsetof(TREE_ELEMENT, left))))
{
do
{
memcpy(&recpos, key + (*keydef->get_key_length)(keydef,key), sizeof(uchar*));
key_length= hp_rb_make_key(keydef, info->recbuf, recpos, 0);
if (ha_key_cmp(keydef->seg, (uchar*) info->recbuf, (uchar*) key,
key_length, SEARCH_FIND | SEARCH_SAME, not_used))
{
error= 1;
DBUG_PRINT("error",("Record in wrong link: key: %u Record: 0x%lx\n",
keynr, (long) recpos));
}
else
found++;
key= tree_search_next(&keydef->rb_tree, &info->last_pos,
offsetof(TREE_ELEMENT, left),
offsetof(TREE_ELEMENT, right));
} while (key);
}
if (found != records)
{
DBUG_PRINT("error",("Found %lu of %lu records", found, records));
error= 1;
}
if (print_status)
printf("Key: %d records: %ld\n", keynr, records);
return error;
}
|
