Details
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Bug
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Status: Open (View Workflow)
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Major
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Resolution: Unresolved
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10.5, 10.6, 10.11, 11.1, 11.2, 11.4, 11.5, 11.6
Description
The kb for enforce_storage_engine states:
- Force the use of a particular storage engine for new tables. Used to avoid unwanted creation of tables using another engine.
- For example, setting to InnoDB will prevent any MyISAM tables from being created.
It also discusses "if another engine is specified in a CREATE TABLE statement" in connection with NO_ENGINE_SUBSTITUTION, however, this is not the case here as no other engine is specified in the CREATE TABLE.
When the following SQL is executed is the CLI:
SET sql_mode=''; # Disables NO_ENGINE_SUBSTITUTION |
SET SESSION enforce_storage_engine=MyISAM; |
CREATE TABLE t (c INT) PARTITION BY LIST (c) (PARTITION p VALUES IN (0)); |
SHOW WARNINGS;
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SHOW CREATE TABLE t; |
We expect the table to MyISAM. However, it is InnoDB (CLI default):
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10.5.27 0e27351028a4888b0da271e2089bf1f847620396 (Optimized) |
10.5.27-opt>SET sql_mode=''; # Disable NO_ENGINE_SUBSTITUTION
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Query OK, 0 rows affected (0.000 sec)
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10.5.27-opt>SET SESSION enforce_storage_engine=MyISAM;
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Query OK, 0 rows affected (0.001 sec)
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10.5.27-opt>CREATE TABLE t (c INT) PARTITION BY LIST (c) (PARTITION p VALUES IN (0));
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Query OK, 0 rows affected, 1 warning (0.010 sec)
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10.5.27-opt>SHOW WARNINGS;
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+-------+------+-------------------------------------------+
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| Level | Code | Message |
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+-------+------+-------------------------------------------+
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| Note | 1266 | Using storage engine MyISAM for table 't' |
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+-------+------+-------------------------------------------+
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1 row in set (0.000 sec)
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10.5.27-opt>SHOW CREATE TABLE t;
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+-------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| Table | Create Table |
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+-------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| t | CREATE TABLE `t` (
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`c` int(11) DEFAULT NULL
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) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
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PARTITION BY LIST (`c`)
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(PARTITION `p` VALUES IN (0) ENGINE = InnoDB) |
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+-------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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1 row in set (0.000 sec)
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We also see the misleading note that MyISAM will be used for the table.
The issue does not happen when no partitioning is used:
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10.5.27 0e27351028a4888b0da271e2089bf1f847620396 (Optimized) |
10.5.27-opt>SET sql_mode=''; # Disable NO_ENGINE_SUBSTITUTION
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Query OK, 0 rows affected (0.000 sec)
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10.5.27-opt>SET SESSION enforce_storage_engine=MyISAM;
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Query OK, 0 rows affected (0.000 sec)
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10.5.27-opt>CREATE TABLE t (c INT);
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Query OK, 0 rows affected, 1 warning (0.002 sec)
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10.5.27-opt>SHOW WARNINGS;
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+-------+------+-------------------------------------------+
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| Level | Code | Message |
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+-------+------+-------------------------------------------+
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| Note | 1266 | Using storage engine MyISAM for table 't' |
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+-------+------+-------------------------------------------+
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1 row in set (0.000 sec)
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10.5.27-opt>SHOW CREATE TABLE t;
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+-------+----------------------------------------------------------------------------------------------------------------+
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| Table | Create Table |
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+-------+----------------------------------------------------------------------------------------------------------------+
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| t | CREATE TABLE `t` (
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`c` int(11) DEFAULT NULL
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) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci |
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+-------+----------------------------------------------------------------------------------------------------------------+
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1 row in set (0.000 sec)
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Present in 10.5+ dbg+opt. The same issue exists in Percona Server; ref MDEV-6858 re: implementation.
Attachments
Issue Links
- relates to
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- Confirmed
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MDEV-6858 enforce_storage_engine option
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- Closed
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