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
|
/*
Copyright (c) 2000, 2011, Oracle and/or its affiliates
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 St, Fifth Floor, Boston, MA 02110-1335 USA */
#ifdef USE_PRAGMA_INTERFACE
#pragma interface /* gcc class implementation */
#endif
/* class for the the myisam merge handler */
#include <myisammrg.h>
/**
Represents one name of a MERGE child.
@todo: Add MYRG_SHARE and store chlidren names in the
share.
*/
class Mrg_child_def: public Sql_alloc
{
/* Remembered MERGE child def version. See top comment in ha_myisammrg.cc */
enum_table_ref_type m_child_table_ref_type;
ulong m_child_def_version;
public:
LEX_STRING db;
LEX_STRING name;
/* Access MERGE child def version. See top comment in ha_myisammrg.cc */
inline enum_table_ref_type get_child_table_ref_type()
{
return m_child_table_ref_type;
}
inline ulong get_child_def_version()
{
return m_child_def_version;
}
inline void set_child_def_version(enum_table_ref_type child_table_ref_type,
ulong version)
{
m_child_table_ref_type= child_table_ref_type;
m_child_def_version= version;
}
Mrg_child_def(char *db_arg, size_t db_len_arg,
char *table_name_arg, size_t table_name_len_arg)
{
db.str= db_arg;
db.length= db_len_arg;
name.str= table_name_arg;
name.length= table_name_len_arg;
m_child_def_version= ~0UL;
m_child_table_ref_type= TABLE_REF_NULL;
}
};
class ha_myisammrg final : public handler
{
MYRG_INFO *file;
my_bool is_cloned; /* This instance has been cloned */
public:
MEM_ROOT children_mem_root; /* mem root for children list */
List<Mrg_child_def> child_def_list;
TABLE_LIST *children_l; /* children list */
TABLE_LIST **children_last_l; /* children list end */
uint test_if_locked; /* flags from ::open() */
ha_myisammrg(handlerton *hton, TABLE_SHARE *table_arg);
~ha_myisammrg();
const char *index_type(uint key_number);
ulonglong table_flags() const
{
return (HA_REC_NOT_IN_SEQ | HA_AUTO_PART_KEY | HA_NO_TRANSACTIONS |
HA_BINLOG_ROW_CAPABLE | HA_BINLOG_STMT_CAPABLE |
HA_NULL_IN_KEY | HA_CAN_INDEX_BLOBS | HA_FILE_BASED |
HA_ANY_INDEX_MAY_BE_UNIQUE | HA_CAN_BIT_FIELD |
HA_HAS_RECORDS | HA_CAN_EXPORT |
HA_NO_COPY_ON_ALTER |
HA_DUPLICATE_POS | HA_CAN_MULTISTEP_MERGE);
}
ulong index_flags(uint inx, uint part, bool all_parts) const
{
return ((table_share->key_info[inx].algorithm == HA_KEY_ALG_FULLTEXT) ?
0 : HA_READ_NEXT | HA_READ_PREV | HA_READ_RANGE |
HA_READ_ORDER | HA_KEYREAD_ONLY);
}
uint max_supported_keys() const { return MI_MAX_KEY; }
uint max_supported_key_length() const { return HA_MAX_KEY_LENGTH; }
uint max_supported_key_part_length() const { return HA_MAX_KEY_LENGTH; }
double scan_time()
{ return ulonglong2double(stats.data_file_length) / IO_SIZE + file->tables; }
int open(const char *name, int mode, uint test_if_locked);
int add_children_list(void);
int attach_children(void);
int detach_children(void);
virtual handler *clone(const char *name, MEM_ROOT *mem_root);
int close(void);
int write_row(const uchar * buf);
int update_row(const uchar * old_data, const uchar * new_data);
int delete_row(const uchar * buf);
int index_read_map(uchar *buf, const uchar *key, key_part_map keypart_map,
enum ha_rkey_function find_flag);
int index_read_idx_map(uchar *buf, uint index, const uchar *key,
key_part_map keypart_map,
enum ha_rkey_function find_flag);
int index_read_last_map(uchar *buf, const uchar *key, key_part_map keypart_map);
int index_next(uchar * buf);
int index_prev(uchar * buf);
int index_first(uchar * buf);
int index_last(uchar * buf);
int index_next_same(uchar *buf, const uchar *key, uint keylen);
int rnd_init(bool scan);
int rnd_next(uchar *buf);
int rnd_pos(uchar * buf, uchar *pos);
void position(const uchar *record);
ha_rows records_in_range(uint inx, const key_range *start_key,
const key_range *end_key, page_range *pages);
int delete_all_rows();
int info(uint);
int reset(void);
int extra(enum ha_extra_function operation);
int extra_opt(enum ha_extra_function operation, ulong cache_size);
int external_lock(THD *thd, int lock_type);
uint lock_count(void) const;
int create_mrg(const char *name, HA_CREATE_INFO *create_info);
int create(const char *name, TABLE *form, HA_CREATE_INFO *create_info);
THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
enum thr_lock_type lock_type);
void update_create_info(HA_CREATE_INFO *create_info);
void append_create_info(String *packet);
MYRG_INFO *myrg_info() { return file; }
TABLE *table_ptr() { return table; }
enum_alter_inplace_result check_if_supported_inplace_alter(TABLE *,
Alter_inplace_info *);
bool inplace_alter_table(TABLE *altered_table,
Alter_inplace_info *ha_alter_info);
int check(THD* thd, HA_CHECK_OPT* check_opt);
ha_rows records();
virtual uint count_query_cache_dependant_tables(uint8 *tables_type);
virtual my_bool
register_query_cache_dependant_tables(THD *thd,
Query_cache *cache,
Query_cache_block_table **block,
uint *n);
virtual void set_lock_type(enum thr_lock_type lock);
};
|
