75
78
* Transaction and Statement messages, false otherwise.
77
80
bool shouldConstructMessages();
82
* Method which returns the active Transaction message
83
* for the supplied Session. If one is not found, a new Transaction
84
* message is allocated, initialized, and returned. It is possible that
85
* we may want to NOT increment the transaction id for a new Transaction
86
* object (e.g., splitting up Transactions into smaller chunks). The
87
* should_inc_trx_id flag controls if we do this.
89
* @param in_session The session processing the transaction
90
* @param should_inc_trx_id If true, increments the transaction id for a new trx
92
message::Transaction *getActiveTransactionMessage(Session *in_session,
93
bool should_inc_trx_id= true);
95
* Method which attaches a transaction context
96
* the supplied transaction based on the supplied Session's
97
* transaction information. This method also ensure the
98
* transaction message is attached properly to the Session object
100
* @param in_transaction The transaction message to initialize
101
* @param in_session The Session processing this transaction
102
* @param should_inc_trx_id If true, increments the transaction id for a new trx
104
void initTransactionMessage(message::Transaction &in_transaction,
106
bool should_inc_trx_id);
108
* Helper method which finalizes data members for the
109
* supplied transaction's context.
111
* @param in_transaction The transaction message to finalize
112
* @param in_session The Session processing this transaction
114
void finalizeTransactionMessage(message::Transaction &in_transaction, Session *in_session);
116
* Helper method which deletes transaction memory and
117
* unsets Session's transaction and statement messages.
119
void cleanupTransactionMessage(message::Transaction *in_transaction,
120
Session *in_session);
122
* Helper method which initializes a Statement message
124
* @param statement The statement to initialize
125
* @param in_type The type of the statement
126
* @param in_session The session processing this statement
128
void initStatementMessage(message::Statement &statement,
129
message::Statement::Type in_type,
130
Session *in_session);
80
132
* Finalizes a Statement message and sets the Session's statement
81
133
* message to NULL.
83
135
* @param statement The statement to initialize
84
* @param session The Session object processing this statement
136
* @param in_session The session processing this statement
86
138
void finalizeStatementMessage(message::Statement &statement,
87
Session::reference session);
139
Session *in_session);
140
/** Helper method which returns an initialized Statement message for methods
141
* doing insertion of data.
143
* @param[in] in_session Pointer to the Session doing the processing
144
* @param[in] in_table Pointer to the Table object being inserted into
145
* @param[out] next_segment_id The next Statement segment id to be used
147
message::Statement &getInsertStatement(Session *in_session,
149
uint32_t *next_segment_id);
152
* Helper method which initializes the header message for
155
* @param[in,out] statement Statement message container to modify
156
* @param[in] in_session Pointer to the Session doing the processing
157
* @param[in] in_table Pointer to the Table being inserted into
159
void setInsertHeader(message::Statement &statement,
163
* Helper method which returns an initialized Statement
164
* message for methods doing updates of data.
166
* @param[in] in_session Pointer to the Session doing the processing
167
* @param[in] in_table Pointer to the Table object being updated
168
* @param[in] old_record Pointer to the old data in the record
169
* @param[in] new_record Pointer to the new data in the record
170
* @param[out] next_segment_id The next Statement segment id to be used
172
message::Statement &getUpdateStatement(Session *in_session,
174
const unsigned char *old_record,
175
const unsigned char *new_record,
176
uint32_t *next_segment_id);
178
* Helper method which initializes the header message for
181
* @param[in,out] statement Statement message container to modify
182
* @param[in] in_session Pointer to the Session doing the processing
183
* @param[in] in_table Pointer to the Table being updated
184
* @param[in] old_record Pointer to the old data in the record
185
* @param[in] new_record Pointer to the new data in the record
187
void setUpdateHeader(message::Statement &statement,
190
const unsigned char *old_record,
191
const unsigned char *new_record);
193
* Helper method which returns an initialized Statement
194
* message for methods doing deletion of data.
196
* @param[in] in_session Pointer to the Session doing the processing
197
* @param[in] in_table Pointer to the Table object being deleted from
198
* @param[out] next_segment_id The next Statement segment id to be used
200
message::Statement &getDeleteStatement(Session *in_session,
202
uint32_t *next_segment_id);
205
* Helper method which initializes the header message for
208
* @param[in,out] statement Statement message container to modify
209
* @param[in] in_session Pointer to the Session doing the processing
210
* @param[in] in_table Pointer to the Table being deleted from
212
void setDeleteHeader(message::Statement &statement,
216
* Commits a normal transaction (see above) and pushes the transaction
217
* message out to the replicators.
219
* @param in_session Pointer to the Session committing the transaction
221
int commitTransactionMessage(Session *in_session);
223
* Marks the current active transaction message as being rolled back and
224
* pushes the transaction message out to replicators.
226
* @param in_session Pointer to the Session committing the transaction
228
void rollbackTransactionMessage(Session *in_session);
90
230
* Creates a new InsertRecord GPB message and pushes it to
93
* @param session Session object which has inserted a record
94
* @param table Table object containing insert information
233
* @param in_session Pointer to the Session which has inserted a record
234
* @param in_table Pointer to the Table containing insert information
96
236
* Grr, returning "true" here on error because of the cursor
97
237
* reversed bool return crap...fix that.
99
bool insertRecord(Session::reference session, Table &in_table);
239
bool insertRecord(Session *in_session, Table *in_table);
102
241
* Creates a new UpdateRecord GPB message and pushes it to
105
* @param session Session object which has updated a record
106
* @param table Table object containing update information
244
* @param in_session Pointer to the Session which has updated a record
245
* @param in_table Pointer to the Table containing update information
107
246
* @param old_record Pointer to the raw bytes representing the old record/row
108
247
* @param new_record Pointer to the raw bytes representing the new record/row
110
void updateRecord(Session::reference session,
249
void updateRecord(Session *in_session,
112
251
const unsigned char *old_record,
113
252
const unsigned char *new_record);
116
254
* Creates a new DeleteRecord GPB message and pushes it to
119
* @param session Session object which has deleted a record
120
* @param table Table object containing delete information
257
* @param in_session Pointer to the Session which has deleted a record
258
* @param in_table Pointer to the Table containing delete information
121
259
* @param use_update_record If true, uses the values from the update row instead
123
void deleteRecord(Session::reference session,
125
bool use_update_record= false);
261
void deleteRecord(Session *in_session, Table *in_table, bool use_update_record= false);
128
263
* Creates a CreateSchema Statement GPB message and adds it
129
264
* to the Session's active Transaction GPB message for pushing
130
265
* out to the replicator streams.
132
* @param[in] session Session object which issued the statement
267
* @param[in] in_session Pointer to the Session which issued the statement
133
268
* @param[in] schema message::Schema message describing new schema
135
void createSchema(Session::reference session, const message::Schema &schema);
270
void createSchema(Session *in_session, const message::Schema &schema);
138
272
* Creates a DropSchema Statement GPB message and adds it
139
273
* to the Session's active Transaction GPB message for pushing
140
274
* out to the replicator streams.
142
* @param[in] session Session object which issued the statement
143
* @param[in] identifier Identifier for the schema to drop
145
void dropSchema(Session::reference session,
146
identifier::Schema::const_reference identifier);
149
* Creates an AlterSchema Statement GPB message and adds it
150
* to the Session's active Transaction GPB message for pushing
151
* out to the replicator streams.
153
* @param[in] session Session object which issued the statement
154
* @param[in] old_schema Original schema definition
155
* @param[in] new_schema New schema definition
157
void alterSchema(Session::reference session,
158
const message::schema::shared_ptr &old_schema,
159
const message::Schema &new_schema);
276
* @param[in] in_session Pointer to the Session which issued the statement
277
* @param[in] schema_name message::Schema message describing new schema
279
void dropSchema(Session *in_session, const std::string &schema_name);
162
281
* Creates a CreateTable Statement GPB message and adds it
163
282
* to the Session's active Transaction GPB message for pushing
164
283
* out to the replicator streams.
166
* @param[in] session Session object which issued the statement
285
* @param[in] in_session Pointer to the Session which issued the statement
167
286
* @param[in] table message::Table message describing new schema
169
void createTable(Session::reference session, const message::Table &table);
288
void createTable(Session *in_session, const message::Table &table);
172
290
* Creates a DropTable Statement GPB message and adds it
173
291
* to the Session's active Transaction GPB message for pushing
174
292
* out to the replicator streams.
176
* @param[in] session Session object which issued the statement
177
* @param[in] table Identifier for the table being dropped
294
* @param[in] in_session Pointer to the Session which issued the statement
295
* @param[in] schema_name The schema of the table being dropped
296
* @param[in] table_name The table name of the table being dropped
178
297
* @param[in] if_exists Did the user specify an IF EXISTS clause?
180
void dropTable(Session::reference session,
181
const identifier::Table &table,
299
void dropTable(Session *in_session,
300
const std::string &schema_name,
301
const std::string &table_name,
185
304
* Creates a TruncateTable Statement GPB message and adds it
186
305
* to the Session's active Transaction GPB message for pushing
187
306
* out to the replicator streams.
189
* @param[in] session Session object which issued the statement
190
* @param[in] table The Table being truncated
308
* @param[in] in_session Pointer to the Session which issued the statement
309
* @param[in] in_table The Table being truncated
192
void truncateTable(Session::reference session, Table &table);
311
void truncateTable(Session *in_session, Table *in_table);
195
313
* Creates a new RawSql GPB message and pushes it to
200
318
* on the I_S, etc. Not sure what to do with administrative
201
319
* commands like CHECK TABLE, though..
203
* @param session Session object which issued the statement
321
* @param in_session Pointer to the Session which issued the statement
204
322
* @param query Query string
206
void rawStatement(Session::reference session, const std::string &query);
324
void rawStatement(Session *in_session, const std::string &query);
208
325
/* transactions: interface to plugin::StorageEngine functions */
209
int rollbackTransaction(Session::reference session, bool all);
212
* Commit the current transaction.
215
* @retval 1 transaction was rolled back
216
* @retval 2 error during commit, data may be inconsistent
219
* Since we don't support nested statement transactions in 5.0,
220
* we can't commit or rollback stmt transactions while we are inside
221
* stored functions or triggers. So we simply do nothing now.
222
* This should be fixed in later ( >= 5.1) releases.
224
int commitTransaction(Session::reference session, bool all);
227
* This is used to commit or rollback a single statement depending on
228
* the value of error.
231
* Note that if the autocommit is on, then the following call inside
232
* InnoDB will commit or rollback the whole transaction (= the statement). The
233
* autocommit mechanism built into InnoDB is based on counting locks, but if
234
* the user has used LOCK TABLES then that mechanism does not know to do the
237
int autocommitOrRollback(Session::reference session, int error);
326
int commitPhaseOne(Session *session, bool all);
327
int rollbackTransaction(Session *session, bool all);
329
/* transactions: these functions never call plugin::StorageEngine functions directly */
330
int commitTransaction(Session *session, bool all);
331
int autocommitOrRollback(Session *session, int error);
240
int rollbackToSavepoint(Session::reference session, NamedSavepoint &sv);
241
int setSavepoint(Session::reference session, NamedSavepoint &sv);
242
int releaseSavepoint(Session::reference session, NamedSavepoint &sv);
334
int rollbackToSavepoint(Session *session, NamedSavepoint &sv);
335
int setSavepoint(Session *session, NamedSavepoint &sv);
336
int releaseSavepoint(Session *session, NamedSavepoint &sv);
245
339
* Marks a storage engine as participating in a statement
311
405
* time when this method is called except from the
312
406
* TransactionServices::registerResourceForStatement method.
314
void registerResourceForTransaction(Session::reference session,
408
void registerResourceForTransaction(Session *session,
315
409
plugin::MonitoredInTransaction *monitored,
316
410
plugin::TransactionalStorageEngine *engine);
318
void registerResourceForTransaction(Session::reference session,
411
void registerResourceForTransaction(Session *session,
319
412
plugin::MonitoredInTransaction *monitored,
320
413
plugin::TransactionalStorageEngine *engine,
321
414
plugin::XaResourceManager *resource_manager);
323
void allocateNewTransactionId();
330
* Send server startup event.
332
* @param session Session object
334
* @retval true Success
335
* @retval false Failure
337
bool sendStartupEvent(Session::reference session);
340
* Send server shutdown event.
342
* @param session Session object
344
* @retval true Success
345
* @retval false Failure
347
bool sendShutdownEvent(Session::reference session);
415
TransactionId getNextTransactionId()
417
return current_transaction_id.increment();
419
TransactionId getCurrentTransactionId()
421
return current_transaction_id;
424
* DEBUG ONLY. See plugin::TransactionLog::truncate()
426
void resetTransactionId()
428
current_transaction_id= 0;
352
* Method which returns the active Transaction message
353
* for the supplied Session. If one is not found, a new Transaction
354
* message is allocated, initialized, and returned. It is possible that
355
* we may want to NOT increment the transaction id for a new Transaction
356
* object (e.g., splitting up Transactions into smaller chunks). The
357
* should_inc_trx_id flag controls if we do this.
359
* @param session The Session object processing the transaction
360
* @param should_inc_trx_id If true, increments the transaction id for a new trx
362
message::Transaction *getActiveTransactionMessage(Session::reference session,
363
bool should_inc_trx_id= true);
366
* Method which attaches a transaction context
367
* the supplied transaction based on the supplied Session's
368
* transaction information. This method also ensure the
369
* transaction message is attached properly to the Session object
371
* @param transaction The transaction message to initialize
372
* @param session The Session object processing this transaction
373
* @param should_inc_trx_id If true, increments the transaction id for a new trx
375
void initTransactionMessage(message::Transaction &transaction,
376
Session::reference session,
377
bool should_inc_trx_id);
380
* Helper method which initializes a Statement message
382
* @param statement The statement to initialize
383
* @param type The type of the statement
384
* @param session The Session object processing this statement
386
void initStatementMessage(message::Statement &statement,
387
message::Statement::Type type,
388
Session::const_reference session);
391
* Helper method which finalizes data members for the
392
* supplied transaction's context.
394
* @param transaction The transaction message to finalize
395
* @param session The Session object processing this transaction
397
void finalizeTransactionMessage(message::Transaction &transaction,
398
Session::const_reference session);
401
* Helper method which deletes transaction memory and
402
* unsets Session's transaction and statement messages.
404
void cleanupTransactionMessage(message::Transaction *transaction,
405
Session::reference session);
407
/** Helper method which returns an initialized Statement message for methods
408
* doing insertion of data.
410
* @param[in] session Session object doing the processing
411
* @param[in] table Table object being inserted into
412
* @param[out] next_segment_id The next Statement segment id to be used
414
message::Statement &getInsertStatement(Session::reference session,
416
uint32_t *next_segment_id);
419
* Helper method which initializes the header message for
422
* @param[in,out] statement Statement message container to modify
423
* @param[in] session Session object doing the processing
424
* @param[in] table Table object being inserted into
426
void setInsertHeader(message::Statement &statement,
427
Session::const_reference session,
430
* Helper method which returns an initialized Statement
431
* message for methods doing updates of data.
433
* @param[in] session Session object doing the processing
434
* @param[in] table Table object being updated
435
* @param[in] old_record Pointer to the old data in the record
436
* @param[in] new_record Pointer to the new data in the record
437
* @param[out] next_segment_id The next Statement segment id to be used
439
message::Statement &getUpdateStatement(Session::reference session,
441
const unsigned char *old_record,
442
const unsigned char *new_record,
443
uint32_t *next_segment_id);
445
* Helper method which initializes the header message for
448
* @param[in,out] statement Statement message container to modify
449
* @param[in] session Session object doing the processing
450
* @param[in] table Table object being updated
451
* @param[in] old_record Pointer to the old data in the record
452
* @param[in] new_record Pointer to the new data in the record
454
void setUpdateHeader(message::Statement &statement,
455
Session::const_reference session,
457
const unsigned char *old_record,
458
const unsigned char *new_record);
461
* Helper method which returns an initialized Statement
462
* message for methods doing deletion of data.
464
* @param[in] session Session object doing the processing
465
* @param[in] table Table object being deleted from
466
* @param[out] next_segment_id The next Statement segment id to be used
468
message::Statement &getDeleteStatement(Session::reference session,
470
uint32_t *next_segment_id);
473
* Helper method which initializes the header message for
476
* @param[in,out] statement Statement message container to modify
477
* @param[in] session Session object doing the processing
478
* @param[in] table Table object being deleted from
480
void setDeleteHeader(message::Statement &statement,
481
Session::const_reference session,
485
* Commits a normal transaction (see above) and pushes the transaction
486
* message out to the replicators.
488
* @param session Session object committing the transaction
490
int commitTransactionMessage(Session::reference session);
493
* Marks the current active transaction message as being rolled back and
494
* pushes the transaction message out to replicators.
496
* @param session Session object committing the transaction
498
void rollbackTransactionMessage(Session::reference session);
501
* Rolls back the current statement, deleting the last Statement out of
502
* the current Transaction message.
504
* @param session Session object committing the transaction
506
* @note This depends on having clear statement boundaries (i.e., one
507
* Statement message per actual SQL statement).
509
void rollbackStatementMessage(Session::reference session);
431
atomic<TransactionId> current_transaction_id;
512
434
* Checks if a field has been updated
514
436
* @param current_field Pointer to the field to check if it is updated
515
* @param table Table object containing update information
437
* @in_table Pointer to the Table containing update information
516
438
* @param old_record Pointer to the raw bytes representing the old record/row
517
439
* @param new_record Pointer to the raw bytes representing the new record/row
519
441
bool isFieldUpdated(Field *current_field,
521
443
const unsigned char *old_record,
522
444
const unsigned char *new_record);
525
* Create a Transaction that contains event information and send it off.
527
* This differs from other uses of Transaction in that we don't use the
528
* message associated with Session. We create a totally new message and
531
* @param session Session object
532
* @param event Event message to send
534
* @note Used by the public Events API.
536
* @returns Non-zero on error
538
int sendEvent(Session::reference session, const message::Event &event);
541
* Makes a given Transaction message segmented.
543
* The given Transaction message will have its segment information set
544
* appropriately and a new Transaction message, containing the same
545
* transaction ID as the supplied Transaction, and is created.
547
* @param session Session object
548
* @param transaction Transaction message to segment.
550
* @returns Returns a pointer to a new Transaction message ready for use.
552
message::Transaction *segmentTransactionMessage(Session::reference session,
553
message::Transaction *transaction);
555
int commitPhaseOne(Session::reference session, bool all);
557
uint64_t getCurrentTransactionId(Session::reference session);
559
plugin::XaStorageEngine *xa_storage_engine;
562
447
} /* namespace drizzled */