12
12
You should have received a copy of the GNU General Public License
13
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 */
14
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
16
16
#include "heap_priv.h"
17
17
#include <drizzled/error.h>
18
18
#include <drizzled/table.h>
19
19
#include <drizzled/session.h>
20
#include <drizzled/current_session.h>
21
#include <drizzled/field/timestamp.h>
20
22
#include <drizzled/field/varstring.h>
21
#include <drizzled/plugin/daemon.h>
22
#include <drizzled/plugin/storage_engine.h>
24
#include <boost/thread/mutex.hpp>
23
#include "drizzled/plugin/daemon.h"
27
26
#include "ha_heap.h"
50
49
HTON_FAST_KEY_READ |
52
HTON_HAS_DATA_DICTIONARY |
53
53
HTON_SKIP_STORE_LOCK |
54
54
HTON_TEMPORARY_ONLY)
56
pthread_mutex_init(&THR_LOCK_heap, MY_MUTEX_INIT_FAST);
58
59
virtual ~HeapEngine()
60
61
hp_panic(HA_PANIC_CLOSE);
63
pthread_mutex_destroy(&THR_LOCK_heap);
63
virtual Cursor *create(Table &table)
66
virtual Cursor *create(TableShare &table,
67
memory::Root *mem_root)
65
return new ha_heap(*this, table);
69
return new (mem_root) ha_heap(*this, table);
68
72
const char **bas_ext() const {
69
73
return ha_heap_exts;
72
int doCreateTable(Session &session,
74
const identifier::Table &identifier,
76
int doCreateTable(Session *session,
78
drizzled::TableIdentifier &identifier,
75
79
message::Table &create_proto);
77
81
/* For whatever reason, internal tables can be created by Cursor::open()
85
89
message::Table &create_proto,
86
90
HP_SHARE **internal_share);
88
int doRenameTable(Session&, const identifier::Table &from, const identifier::Table &to);
92
int doRenameTable(Session&, TableIdentifier &from, TableIdentifier &to);
90
int doDropTable(Session&, const identifier::Table &identifier);
94
int doDropTable(Session&, TableIdentifier &identifier);
92
96
int doGetTableDefinition(Session& session,
93
const identifier::Table &identifier,
97
TableIdentifier &identifier,
94
98
message::Table &table_message);
100
/* Temp only engine, so do not return values. */
101
void doGetTableNames(CachedDirectory &, string& , set<string>&) { };
96
103
uint32_t max_supported_keys() const { return MAX_KEY; }
97
104
uint32_t max_supported_key_part_length() const { return MAX_KEY_LENGTH; }
99
uint32_t index_flags(enum ha_key_alg ) const
106
uint32_t index_flags(enum ha_key_alg algorithm) const
101
return ( HA_ONLY_WHOLE_INDEX | HA_KEY_SCAN_NOT_ROR);
108
return ((algorithm == HA_KEY_ALG_BTREE) ?
113
HA_ONLY_WHOLE_INDEX |
114
HA_KEY_SCAN_NOT_ROR);
104
bool doDoesTableExist(Session& session, const identifier::Table &identifier);
105
void doGetTableIdentifiers(CachedDirectory &directory,
106
const identifier::Schema &schema_identifier,
107
identifier::Table::vector &set_of_identifiers);
117
bool doDoesTableExist(Session& session, TableIdentifier &identifier);
110
void HeapEngine::doGetTableIdentifiers(CachedDirectory&,
111
const identifier::Schema&,
112
identifier::Table::vector&)
116
bool HeapEngine::doDoesTableExist(Session& session, const identifier::Table &identifier)
118
return session.getMessageCache().doesTableMessageExist(identifier);
120
bool HeapEngine::doDoesTableExist(Session& session, TableIdentifier &identifier)
122
return session.doesTableMessageExist(identifier);
121
125
int HeapEngine::doGetTableDefinition(Session &session,
122
const identifier::Table &identifier,
126
TableIdentifier &identifier,
123
127
message::Table &table_proto)
125
if (session.getMessageCache().getTableMessage(identifier, table_proto))
129
if (session.getTableMessage(identifier, table_proto))
131
135
We have to ignore ENOENT entries as the MEMORY table is created on open and
132
136
not when doing a CREATE on the table.
134
int HeapEngine::doDropTable(Session &session, const identifier::Table &identifier)
138
int HeapEngine::doDropTable(Session &session, TableIdentifier &identifier)
136
session.getMessageCache().removeTableMessage(identifier);
138
int error= heap_delete_table(identifier.getPath().c_str());
140
session.removeTableMessage(identifier);
142
return heap_delete_table(identifier.getPath().c_str());
146
145
static HeapEngine *heap_storage_engine= NULL;
148
static int heap_init(module::Context &context)
147
static int heap_init(plugin::Context &context)
150
149
heap_storage_engine= new HeapEngine(engine_name);
151
150
context.add(heap_storage_engine);
177
176
#define MEMORY_STATS_UPDATE_THRESHOLD 10
179
int ha_heap::doOpen(const drizzled::identifier::Table &identifier, int mode, uint32_t test_if_locked)
178
int ha_heap::open(const char *name, int mode, uint32_t test_if_locked)
181
if ((test_if_locked & HA_OPEN_INTERNAL_TABLE) || (!(file= heap_open(identifier.getPath().c_str(), mode)) && errno == ENOENT))
180
if ((test_if_locked & HA_OPEN_INTERNAL_TABLE) || (!(file= heap_open(name, mode)) && errno == ENOENT))
182
HA_CREATE_INFO create_info;
183
183
internal_table= test(test_if_locked & HA_OPEN_INTERNAL_TABLE);
184
memset(&create_info, 0, sizeof(create_info));
185
186
HP_SHARE *internal_share= NULL;
186
187
message::Table create_proto;
188
if (not heap_storage_engine->heap_create_table(getTable()->in_use,
189
identifier.getPath().c_str(),
189
if (!heap_storage_engine->heap_create_table(ha_session(), name, table,
195
194
file= internal_table ?
196
195
heap_open_from_share(internal_share, mode) :
235
235
Do same as default implementation but use file->s->name instead of
236
table->getShare()->path. This is needed by Windows where the clone() call sees
237
'/'-delimited path in table->getShare()->path, while ha_peap::open() was called
236
table->s->path. This is needed by Windows where the clone() call sees
237
'/'-delimited path in table->s->path, while ha_peap::open() was called
238
238
with '\'-delimited path.
241
Cursor *ha_heap::clone(memory::Root *)
241
Cursor *ha_heap::clone(memory::Root *mem_root)
243
Cursor *new_handler= getTable()->getMutableShare()->db_type()->getCursor(*getTable());
244
identifier::Table identifier(getTable()->getShare()->getSchemaName(),
245
getTable()->getShare()->getTableName(),
246
getTable()->getShare()->getPath());
243
Cursor *new_handler= table->s->db_type()->getCursor(*table->s, mem_root);
248
if (new_handler && !new_handler->ha_open(identifier, getTable()->db_stat,
245
if (new_handler && !new_handler->ha_open(table, file->s->name, table->db_stat,
249
246
HA_OPEN_IGNORE_IF_LOCKED))
250
247
return new_handler;
255
const char *ha_heap::index_type(uint32_t )
252
const char *ha_heap::index_type(uint32_t inx)
254
return ((table_share->key_info[inx].algorithm == HA_KEY_ALG_BTREE) ?
277
275
void ha_heap::set_keys_for_scanning(void)
278
for (uint32_t i= 0 ; i < table->s->keys ; i++)
280
if (table->key_info[i].algorithm == HA_KEY_ALG_BTREE)
282
286
void ha_heap::update_key_stats()
284
for (uint32_t i= 0; i < getTable()->getShare()->sizeKeys(); i++)
288
for (uint32_t i= 0; i < table->s->keys; i++)
286
KeyInfo *key= &getTable()->key_info[i];
290
KEY *key=table->key_info+i;
288
291
if (!key->rec_per_key)
293
if (key->algorithm != HA_KEY_ALG_BTREE)
292
295
if (key->flags & HA_NOSAME)
293
296
key->rec_per_key[key->key_parts-1]= 1;
296
ha_rows hash_buckets= file->getShare()->keydef[i].hash_buckets;
297
uint32_t no_records= hash_buckets ? (uint) (file->getShare()->records/hash_buckets) : 2;
299
ha_rows hash_buckets= file->s->keydef[i].hash_buckets;
300
uint32_t no_records= hash_buckets ? (uint) (file->s->records/hash_buckets) : 2;
298
301
if (no_records < 2)
300
303
key->rec_per_key[key->key_parts-1]= no_records;
304
307
records_changed= 0;
305
308
/* At the end of update_key_stats() we can proudly claim they are OK. */
306
key_stat_version= file->getShare()->key_stat_version;
309
key_stat_version= file->s->key_stat_version;
310
int ha_heap::doInsertRecord(unsigned char * buf)
313
int ha_heap::write_row(unsigned char * buf)
313
if (getTable()->next_number_field && buf == getTable()->getInsertRecord())
316
ha_statistic_increment(&system_status_var::ha_write_count);
317
if (table->next_number_field && buf == table->record[0])
315
319
if ((res= update_auto_increment()))
318
322
res= heap_write(file,buf);
319
323
if (!res && (++records_changed*MEMORY_STATS_UPDATE_THRESHOLD >
320
file->getShare()->records))
323
327
We can perform this safely since only one writer at the time is
324
328
allowed on the table.
326
file->getShare()->key_stat_version++;
330
file->s->key_stat_version++;
331
int ha_heap::doUpdateRecord(const unsigned char * old_data, unsigned char * new_data)
335
int ha_heap::update_row(const unsigned char * old_data, unsigned char * new_data)
338
ha_statistic_increment(&system_status_var::ha_update_count);
339
if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_UPDATE)
340
table->timestamp_field->set_time();
335
341
res= heap_update(file,old_data,new_data);
336
342
if (!res && ++records_changed*MEMORY_STATS_UPDATE_THRESHOLD >
337
file->getShare()->records)
340
346
We can perform this safely since only one writer at the time is
341
347
allowed on the table.
343
file->getShare()->key_stat_version++;
349
file->s->key_stat_version++;
348
int ha_heap::doDeleteRecord(const unsigned char * buf)
354
int ha_heap::delete_row(const unsigned char * buf)
357
ha_statistic_increment(&system_status_var::ha_delete_count);
352
358
res= heap_delete(file,buf);
353
if (!res && getTable()->getShare()->getType() == message::Table::STANDARD &&
354
++records_changed*MEMORY_STATS_UPDATE_THRESHOLD > file->getShare()->records)
359
if (!res && table->s->tmp_table == STANDARD_TABLE &&
360
++records_changed*MEMORY_STATS_UPDATE_THRESHOLD > file->s->records)
357
363
We can perform this safely since only one writer at the time is
358
364
allowed on the table.
360
file->getShare()->key_stat_version++;
366
file->s->key_stat_version++;
426
432
assert(inited==INDEX);
427
433
ha_statistic_increment(&system_status_var::ha_read_last_count);
428
434
int error=heap_rlast(file, buf, active_index);
429
getTable()->status=error ? STATUS_NOT_FOUND: 0;
435
table->status=error ? STATUS_NOT_FOUND: 0;
433
int ha_heap::doStartTableScan(bool scan)
439
int ha_heap::rnd_init(bool scan)
435
441
return scan ? heap_scan_init(file) : 0;
450
456
ha_statistic_increment(&system_status_var::ha_read_rnd_count);
451
457
memcpy(&heap_position, pos, sizeof(HEAP_PTR));
452
458
error=heap_rrnd(file, buf, heap_position);
453
getTable()->status=error ? STATUS_NOT_FOUND: 0;
459
table->status=error ? STATUS_NOT_FOUND: 0;
479
485
have to update the key statistics. Hoping that a table lock is now
482
if (key_stat_version != file->getShare()->key_stat_version)
488
if (key_stat_version != file->s->key_stat_version)
483
489
update_key_stats();
494
enum row_type ha_heap::get_row_type() const
496
if (file->s->recordspace.is_variable_size)
497
return ROW_TYPE_DYNAMIC;
499
return ROW_TYPE_FIXED;
487
502
int ha_heap::extra(enum ha_extra_function operation)
489
504
return heap_extra(file,operation);
620
635
void ha_heap::drop_table(const char *)
622
file->getShare()->delete_on_close= 1;
637
file->s->delete_on_close= 1;
627
int HeapEngine::doRenameTable(Session &session, const identifier::Table &from, const identifier::Table &to)
642
int HeapEngine::doRenameTable(Session &session, TableIdentifier &from, TableIdentifier &to)
629
session.getMessageCache().renameTableMessage(from, to);
644
session.renameTableMessage(from, to);
630
645
return heap_rename(from.getPath().c_str(), to.getPath().c_str());
634
649
ha_rows ha_heap::records_in_range(uint32_t inx, key_range *min_key,
635
650
key_range *max_key)
637
KeyInfo *key= &getTable()->key_info[inx];
652
KEY *key=table->key_info+inx;
653
if (key->algorithm == HA_KEY_ALG_BTREE)
654
return hp_rb_records_in_range(file, inx, min_key, max_key);
639
656
if (!min_key || !max_key ||
640
657
min_key->length != max_key->length ||
647
664
return stats.records;
649
666
/* Assert that info() did run. We need current statistics here. */
650
assert(key_stat_version == file->getShare()->key_stat_version);
667
assert(key_stat_version == file->s->key_stat_version);
651
668
return key->rec_per_key[key->key_parts-1];
654
int HeapEngine::doCreateTable(Session &session,
671
int HeapEngine::doCreateTable(Session *session,
655
672
Table &table_arg,
656
const identifier::Table &identifier,
673
drizzled::TableIdentifier &identifier,
657
674
message::Table& create_proto)
660
677
HP_SHARE *internal_share;
661
678
const char *table_name= identifier.getPath().c_str();
663
error= heap_create_table(&session, table_name, &table_arg,
680
error= heap_create_table(session, table_name, &table_arg,
666
683
&internal_share);
670
session.getMessageCache().storeTableMessage(identifier, create_proto);
687
session->storeTableMessage(identifier, create_proto);
680
697
message::Table &create_proto,
681
698
HP_SHARE **internal_share)
683
uint32_t key, parts, mem_per_row_keys= 0;
684
uint32_t keys= table_arg->getShare()->sizeKeys();
700
uint32_t key, parts, mem_per_row_keys= 0, keys= table_arg->s->keys;
685
701
uint32_t auto_key= 0, auto_key_type= 0;
686
702
uint32_t max_key_fieldnr = 0, key_part_size = 0, next_field_pos = 0;
687
uint32_t column_count= table_arg->getShare()->sizeFields();
688
std::vector<HP_KEYDEF> keydef;
703
uint32_t column_idx, column_count= table_arg->s->fields;
704
HP_COLUMNDEF *columndef;
707
char buff[FN_REFLEN];
709
TableShare *share= table_arg->s;
690
710
bool found_real_auto_increment= 0;
695
715
* can return a number more than that, we trap it here instead of casting
696
716
* to a truncated integer.
698
uint64_t num_rows= table_arg->getShare()->getMaxRows();
718
uint64_t num_rows= share->getMaxRows();
699
719
if (num_rows > UINT32_MAX)
722
if (!(columndef= (HP_COLUMNDEF*) malloc(column_count * sizeof(HP_COLUMNDEF))))
725
for (column_idx= 0; column_idx < column_count; column_idx++)
727
Field* field= *(table_arg->field + column_idx);
728
HP_COLUMNDEF* column= columndef + column_idx;
729
column->type= (uint16_t)field->type();
730
column->length= field->pack_length();
731
column->offset= field->offset(field->table->record[0]);
735
column->null_bit= field->null_bit;
736
column->null_pos= (uint) (field->null_ptr - (unsigned char*) table_arg->record[0]);
744
if (field->type() == DRIZZLE_TYPE_VARCHAR)
746
column->length_bytes= (uint8_t)(((Field_varstring*)field)->length_bytes);
750
column->length_bytes= 0;
702
754
for (key= parts= 0; key < keys; key++)
703
755
parts+= table_arg->key_info[key].key_parts;
706
std::vector<HA_KEYSEG> seg_buffer;
707
seg_buffer.resize(parts);
708
HA_KEYSEG *seg= &seg_buffer[0];
757
if (!(keydef= (HP_KEYDEF*) malloc(keys * sizeof(HP_KEYDEF) +
758
parts * sizeof(HA_KEYSEG))))
760
free((void *) columndef);
764
seg= reinterpret_cast<HA_KEYSEG*> (keydef + keys);
710
765
for (key= 0; key < keys; key++)
712
KeyInfo *pos= &table_arg->key_info[key];
713
KeyPartInfo *key_part= pos->key_part;
714
KeyPartInfo *key_part_end= key_part + pos->key_parts;
767
KEY *pos= table_arg->key_info+key;
768
KEY_PART_INFO *key_part= pos->key_part;
769
KEY_PART_INFO *key_part_end= key_part + pos->key_parts;
716
771
keydef[key].keysegs= (uint) pos->key_parts;
717
772
keydef[key].flag= (pos->flags & (HA_NOSAME | HA_NULL_ARE_EQUAL));
718
773
keydef[key].seg= seg;
720
mem_per_row_keys+= sizeof(char*) * 2; // = sizeof(HASH_INFO)
775
switch (pos->algorithm) {
776
case HA_KEY_ALG_UNDEF:
777
case HA_KEY_ALG_HASH:
778
keydef[key].algorithm= HA_KEY_ALG_HASH;
779
mem_per_row_keys+= sizeof(char*) * 2; // = sizeof(HASH_INFO)
781
case HA_KEY_ALG_BTREE:
782
keydef[key].algorithm= HA_KEY_ALG_BTREE;
783
mem_per_row_keys+=sizeof(TREE_ELEMENT)+pos->key_length+sizeof(char*);
786
assert(0); // cannot happen
722
789
for (; key_part != key_part_end; key_part++, seg++)
724
791
Field *field= key_part->field;
793
if (pos->algorithm == HA_KEY_ALG_BTREE)
794
seg->type= field->key_type();
727
797
if ((seg->type = field->key_type()) != (int) HA_KEYTYPE_TEXT &&
728
798
seg->type != HA_KEYTYPE_VARTEXT1 &&
770
840
auto_key= key+ 1;
771
841
auto_key_type= field->key_type();
773
if ((uint)field->position() + 1 > max_key_fieldnr)
843
if ((uint)field->field_index + 1 > max_key_fieldnr)
775
845
/* Do not use seg->fieldnr as it's not reliable in case of temp tables */
776
max_key_fieldnr= field->position() + 1;
846
max_key_fieldnr= field->field_index + 1;
781
if (key_part_size < table_arg->getShare()->null_bytes + ((table_arg->getShare()->last_null_bit_pos+7) >> 3))
851
if (key_part_size < share->null_bytes + ((share->last_null_bit_pos+7) >> 3))
783
853
/* Make sure to include null fields regardless of the presense of keys */
784
key_part_size = table_arg->getShare()->null_bytes + ((table_arg->getShare()->last_null_bit_pos+7) >> 3);
854
key_part_size = share->null_bytes + ((share->last_null_bit_pos+7) >> 3);
789
859
if (table_arg->found_next_number_field)
791
keydef[table_arg->getShare()->next_number_index].flag|= HA_AUTO_KEY;
792
found_real_auto_increment= table_arg->getShare()->next_number_key_offset == 0;
861
keydef[share->next_number_index].flag|= HA_AUTO_KEY;
862
found_real_auto_increment= share->next_number_key_offset == 0;
794
864
HP_CREATE_INFO hp_create_info;
795
865
hp_create_info.auto_key= auto_key;
799
869
hp_create_info.max_table_size=session->variables.max_heap_table_size;
800
870
hp_create_info.with_auto_increment= found_real_auto_increment;
801
871
hp_create_info.internal_table= internal_table;
802
hp_create_info.max_chunk_size= table_arg->getShare()->block_size;
804
error= heap_create(table_name,
808
table_arg->getShare()->getRecordLength(), mem_per_row_keys,
809
static_cast<uint32_t>(num_rows), /* We check for overflow above, so cast is fine here. */
811
&hp_create_info, internal_share);
872
hp_create_info.max_chunk_size= share->block_size;
873
hp_create_info.is_dynamic= (share->row_type == ROW_TYPE_DYNAMIC);
875
error= heap_create(internal::fn_format(buff,table_name,"","",
876
MY_REPLACE_EXT|MY_UNPACK_FILENAME),
878
column_count, columndef,
879
max_key_fieldnr, key_part_size,
880
share->reclength, mem_per_row_keys,
881
static_cast<uint32_t>(num_rows), /* We check for overflow above, so cast is fine here. */
883
&hp_create_info, internal_share);
885
free((unsigned char*) keydef);
886
free((void *) columndef);