Details
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Bug
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Status: Closed (View Workflow)
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Minor
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Resolution: Fixed
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10.0.2
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None
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None
Description
When the first SQL to use a SEQUENCE table is DDL, it is only discovered with TEST_SQL_DISCOVERY enabled.
TEST_SQL_DISCOVERY enabled:
MariaDB [test]> show engines;
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+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
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| MRG_MyISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
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| CSV | YES | CSV storage engine | NO | NO | NO |
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| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
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| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
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| Aria | YES | Crash-safe tables with MyISAM heritage | NO | NO | NO |
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| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
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| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
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| TEST_SQL_DISCOVERY | YES | Minimal engine to test table discovery via sql statements | NO | NO | NO |
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| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
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| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
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| FEDERATED | YES | FederatedX pluggable storage engine | YES | NO | YES |
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| SPHINX | YES | Sphinx storage engine | NO | NO | NO |
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| CONNECT | YES | Direct access to external data, including many file formats | NO | NO | NO |
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| SEQUENCE | YES | Generated tables filled with sequential values | YES | YES | YES |
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+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
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14 rows in set (0.00 sec)
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|
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MariaDB [test]> drop table seq_1_to_1;
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Query OK, 0 rows affected (0.01 sec)
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TEST_SQL_DISCOVERY disabled:
MariaDB [test]> show engines;
|
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
|
| MRG_MyISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
|
| CSV | YES | CSV storage engine | NO | NO | NO |
|
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
|
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
|
| Aria | YES | Crash-safe tables with MyISAM heritage | NO | NO | NO |
|
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
|
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
|
| TEST_SQL_DISCOVERY | NO | Minimal engine to test table discovery via sql statements | NULL | NULL | NULL |
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| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
|
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
|
| FEDERATED | YES | FederatedX pluggable storage engine | YES | NO | YES |
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| SPHINX | YES | Sphinx storage engine | NO | NO | NO |
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| CONNECT | YES | Direct access to external data, including many file formats | NO | NO | NO |
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| SEQUENCE | YES | Generated tables filled with sequential values | YES | YES | YES |
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+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
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14 rows in set (0.00 sec)
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|
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MariaDB [test]> drop table seq_1_to_1;
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ERROR 1051 (42S02): Unknown table 'seq_1_to_1'
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SELECT and SHOW CREATE still work as expected:
MariaDB [test]> select * from seq_1_to_2;
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+-----+
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| seq |
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+-----+
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| 1 |
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| 2 |
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+-----+
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2 rows in set (0.01 sec)
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|
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MariaDB [test]> show create table seq_1_to_3;
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+------------+----------------------------------------------------------------------------------------------------------------------------------+
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| Table | Create Table |
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+------------+----------------------------------------------------------------------------------------------------------------------------------+
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| seq_1_to_3 | CREATE TABLE `seq_1_to_3` (
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`seq` bigint(20) unsigned NOT NULL,
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PRIMARY KEY (`seq`)
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) ENGINE=SEQUENCE DEFAULT CHARSET=latin1 |
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+------------+----------------------------------------------------------------------------------------------------------------------------------+
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1 row in set (0.00 sec)
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I would actually expect DROP TABLE to cause ER_ILLEGAL_HA, but maybe it's impossible or undesirable for engine purposes; in any case the behavior on DDL is somewhat inconsistent now, but it's out of scope of this report. I will file something about it separately for the record, although it doesn't seem important.
Attachments
Issue Links
- relates to
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MDEV-3808 Better table discovery
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- Closed
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