How can I see the storage engine of a table in MySQL?
How can I see the storage engine of a table in MySQL?
To determine which engine a database table is currently using, type the following command at the mysql> prompt. Replace database with the name of the database that you want to check: Copy SELECT TABLE_NAME, ENGINE FROM information_schema. TABLES where TABLE_SCHEMA = ‘database’;
What is engine in MySQL CREATE TABLE?
A storage engine is a software module that a database management system uses to create, read, update data from a database. There are two types of storage engines in MySQL: transactional and non-transactional. For MySQL 5.5 and later, the default storage engine is InnoDB.
How do I find my MySQL database engine?
Show activity on this post. Add default-storage-engine=InnoDB in [mysqld] section of the my. cnf file for the default engine to be active. Use the ‘show create table table_name’ command to view default engine in the table.
What is InnoDB table MySQL?
InnoDB is a general-purpose storage engine that balances high reliability and high performance. In MySQL 5.6, InnoDB is the default MySQL storage engine. Unless you have configured a different default storage engine, issuing a CREATE TABLE statement without an ENGINE clause creates an InnoDB table.
Where can I find InnoDB in MySQL?
You can view a list of InnoDB INFORMATION_SCHEMA tables by issuing a SHOW TABLES statement on the INFORMATION_SCHEMA database: mysql> SHOW TABLES FROM INFORMATION_SCHEMA LIKE ‘INNODB%’; For table definitions, see Section 26.4, “INFORMATION_SCHEMA InnoDB Tables”.
How do you set an engine for a table?
CREATE TABLE t1 (i INT) ENGINE = INNODB; — Simple table definitions can be switched from one to another. CREATE TABLE t2 (i INT) ENGINE = CSV; CREATE TABLE t3 (i INT) ENGINE = MEMORY; When you omit the ENGINE option, the default storage engine is used. The default engine is InnoDB in MySQL 5.6.
What is the default storage engine in MySQL?
InnoDB
The default engine is InnoDB in MySQL 5.7. You can specify the default engine by using the –default-storage-engine server startup option, or by setting the default-storage-engine option in the my. cnf configuration file.
How does InnoDB store data?
When you create a table using the InnoDB storage engine, data written to that table is stored on the file system in a data file called a tablespace. Tablespace files contain both the data and indexes. When innodb_file_per_table=ON is set, InnoDB uses one tablespace file per InnoDB table.
How do I know if my MySQL database is InnoDB?
To determine whether your server supports InnoDB :
- Issue the SHOW ENGINES statement to view the available MySQL storage engines.
- If InnoDB is not present, you have a mysqld binary that was compiled without InnoDB support and you need to get a different one.
What is the default storage engine of MySQL?
The default engine is InnoDB in MySQL 8.0. You can specify the default engine by using the –default-storage-engine server startup option, or by setting the default-storage-engine option in the my. cnf configuration file.
What is MyISAM tables in MySQL?
MyISAM is a storage engine employed by MySQL database that was used by default prior to MySQL version 5.5 (released in December, 2009). It is based on ISAM (Indexed Sequential Access Method), an indexing algorithm developed by IBM that allows retrieving information from large sets of data in a fast way.
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