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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
|
#ifndef SQL_PARTITION_INCLUDED
#define SQL_PARTITION_INCLUDED
/*
Copyright (c) 2006, 2010, 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 02110-1301 USA */
#ifdef __GNUC__
#pragma interface /* gcc class implementation */
#endif
#include "sql_list.h" /* List */
#include "table.h" /* TABLE_LIST */
class Alter_info;
class Field;
class String;
class handler;
class partition_info;
struct TABLE;
struct TABLE_LIST;
typedef struct st_bitmap MY_BITMAP;
typedef struct st_ha_create_information HA_CREATE_INFO;
typedef struct st_key KEY;
typedef struct st_key_range key_range;
/* Flags for partition handlers */
#define HA_CAN_PARTITION (1 << 0) /* Partition support */
#define HA_CAN_UPDATE_PARTITION_KEY (1 << 1)
#define HA_CAN_PARTITION_UNIQUE (1 << 2)
#define HA_USE_AUTO_PARTITION (1 << 3)
#define NORMAL_PART_NAME 0
#define TEMP_PART_NAME 1
#define RENAMED_PART_NAME 2
typedef struct st_lock_param_type
{
TABLE_LIST *table_list;
ulonglong copied;
ulonglong deleted;
THD *thd;
HA_CREATE_INFO *create_info;
Alter_info *alter_info;
TABLE *table;
TABLE *old_table;
KEY *key_info_buffer;
const char *db;
const char *table_name;
uchar *pack_frm_data;
uint key_count;
uint db_options;
size_t pack_frm_len;
partition_info *part_info;
} ALTER_PARTITION_PARAM_TYPE;
typedef struct {
longlong list_value;
uint32 partition_id;
} LIST_PART_ENTRY;
typedef struct {
uint32 start_part;
uint32 end_part;
} part_id_range;
struct st_partition_iter;
#define NOT_A_PARTITION_ID ((uint32)-1)
bool is_partition_in_list(char *part_name, List<char> list_part_names);
char *are_partitions_in_table(partition_info *new_part_info,
partition_info *old_part_info);
bool check_reorganise_list(partition_info *new_part_info,
partition_info *old_part_info,
List<char> list_part_names);
handler *get_ha_partition(partition_info *part_info);
int get_parts_for_update(const uchar *old_data, uchar *new_data,
const uchar *rec0, partition_info *part_info,
uint32 *old_part_id, uint32 *new_part_id,
longlong *func_value);
int get_part_for_delete(const uchar *buf, const uchar *rec0,
partition_info *part_info, uint32 *part_id);
void prune_partition_set(const TABLE *table, part_id_range *part_spec);
bool check_partition_info(partition_info *part_info,handlerton **eng_type,
TABLE *table, handler *file, HA_CREATE_INFO *info);
void set_linear_hash_mask(partition_info *part_info, uint num_parts);
bool fix_partition_func(THD *thd, TABLE *table, bool create_table_ind);
void get_partition_set(const TABLE *table, uchar *buf, const uint index,
const key_range *key_spec,
part_id_range *part_spec);
uint get_partition_field_store_length(Field *field);
int get_cs_converted_part_value_from_string(THD *thd,
Item *item,
String *input_str,
String *output_str,
CHARSET_INFO *cs,
bool use_hex);
void get_full_part_id_from_key(const TABLE *table, uchar *buf,
KEY *key_info,
const key_range *key_spec,
part_id_range *part_spec);
bool mysql_unpack_partition(THD *thd, char *part_buf,
uint part_info_len,
TABLE *table, bool is_create_table_ind,
handlerton *default_db_type,
bool *work_part_info_used);
void make_used_partitions_str(partition_info *part_info, String *parts_str);
uint32 get_list_array_idx_for_endpoint(partition_info *part_info,
bool left_endpoint,
bool include_endpoint);
uint32 get_partition_id_range_for_endpoint(partition_info *part_info,
bool left_endpoint,
bool include_endpoint);
bool check_part_func_fields(Field **ptr, bool ok_with_charsets);
bool field_is_partition_charset(Field *field);
Item* convert_charset_partition_constant(Item *item, CHARSET_INFO *cs);
void mem_alloc_error(size_t size);
/*
A "Get next" function for partition iterator.
SYNOPSIS
partition_iter_func()
part_iter Partition iterator, you call only "iter.get_next(&iter)"
DESCRIPTION
Depending on whether partitions or sub-partitions are iterated, the
function returns next subpartition id/partition number. The sequence of
returned numbers is not ordered and may contain duplicates.
When the end of sequence is reached, NOT_A_PARTITION_ID is returned, and
the iterator resets itself (so next get_next() call will start to
enumerate the set all over again).
RETURN
NOT_A_PARTITION_ID if there are no more partitions.
[sub]partition_id of the next partition
*/
typedef uint32 (*partition_iter_func)(st_partition_iter* part_iter);
/*
Partition set iterator. Used to enumerate a set of [sub]partitions
obtained in partition interval analysis (see get_partitions_in_range_iter).
For the user, the only meaningful field is get_next, which may be used as
follows:
part_iterator.get_next(&part_iterator);
Initialization is done by any of the following calls:
- get_partitions_in_range_iter-type function call
- init_single_partition_iterator()
- init_all_partitions_iterator()
Cleanup is not needed.
*/
typedef struct st_partition_iter
{
partition_iter_func get_next;
/*
Valid for "Interval mapping" in LIST partitioning: if true, let the
iterator also produce id of the partition that contains NULL value.
*/
bool ret_null_part, ret_null_part_orig;
struct st_part_num_range
{
uint32 start;
uint32 cur;
uint32 end;
};
struct st_field_value_range
{
longlong start;
longlong cur;
longlong end;
};
union
{
struct st_part_num_range part_nums;
struct st_field_value_range field_vals;
};
partition_info *part_info;
} PARTITION_ITERATOR;
/*
Get an iterator for set of partitions that match given field-space interval
SYNOPSIS
get_partitions_in_range_iter()
part_info Partitioning info
is_subpart
store_length_array Length of fields packed in opt_range_key format
min_val Left edge, field value in opt_range_key format
max_val Right edge, field value in opt_range_key format
min_len Length of minimum value
max_len Length of maximum value
flags Some combination of NEAR_MIN, NEAR_MAX, NO_MIN_RANGE,
NO_MAX_RANGE
part_iter Iterator structure to be initialized
DESCRIPTION
Functions with this signature are used to perform "Partitioning Interval
Analysis". This analysis is applicable for any type of [sub]partitioning
by some function of a single fieldX. The idea is as follows:
Given an interval "const1 <=? fieldX <=? const2", find a set of partitions
that may contain records with value of fieldX within the given interval.
The min_val, max_val and flags parameters specify the interval.
The set of partitions is returned by initializing an iterator in *part_iter
NOTES
There are currently three functions of this type:
- get_part_iter_for_interval_via_walking
- get_part_iter_for_interval_cols_via_map
- get_part_iter_for_interval_via_mapping
RETURN
0 - No matching partitions, iterator not initialized
1 - Some partitions would match, iterator intialized for traversing them
-1 - All partitions would match, iterator not initialized
*/
typedef int (*get_partitions_in_range_iter)(partition_info *part_info,
bool is_subpart,
uint32 *store_length_array,
uchar *min_val, uchar *max_val,
uint min_len, uint max_len,
uint flags,
PARTITION_ITERATOR *part_iter);
#include "partition_info.h"
#ifdef WITH_PARTITION_STORAGE_ENGINE
uint fast_alter_partition_table(THD *thd, TABLE *table,
Alter_info *alter_info,
HA_CREATE_INFO *create_info,
TABLE_LIST *table_list,
char *db,
const char *table_name,
TABLE *fast_alter_table);
bool set_part_state(Alter_info *alter_info, partition_info *tab_part_info,
enum partition_state part_state);
uint prep_alter_part_table(THD *thd, TABLE *table, Alter_info *alter_info,
HA_CREATE_INFO *create_info,
handlerton *old_db_type,
bool *partition_changed,
char *db,
const char *table_name,
const char *path,
TABLE **fast_alter_table);
char *generate_partition_syntax(partition_info *part_info,
uint *buf_length, bool use_sql_alloc,
bool show_partition_options,
HA_CREATE_INFO *create_info,
Alter_info *alter_info);
bool partition_key_modified(TABLE *table, const MY_BITMAP *fields);
#else
#define partition_key_modified(X,Y) 0
#endif
void create_partition_name(char *out, const char *in1,
const char *in2, uint name_variant,
bool translate);
void create_subpartition_name(char *out, const char *in1,
const char *in2, const char *in3,
uint name_variant);
void set_field_ptr(Field **ptr, const uchar *new_buf, const uchar *old_buf);
void set_key_field_ptr(KEY *key_info, const uchar *new_buf,
const uchar *old_buf);
extern const LEX_STRING partition_keywords[];
#endif /* SQL_PARTITION_INCLUDED */
|
