What can you do with alter table in MariaDB?
ALTER TABLE enables you to change the structure of an existing table. For example, you can add or delete columns, create or destroy indexes, change the type of existing columns, or rename columns or the table itself. You can also change the comment for the table and the storage engine of the table.
What happens when column definitions do not match in MariaDB?
When using row-based replication, the value of the slave_type_conversions variable is important. The default value of this variable is empty, in which case MariaDB will not perform attribute promotion or demotion. If the column definitions do not match, replication will stop.
When to use first and after clauses in MariaDB?
This is very useful when doing scripts to modify tables. The FIRST and AFTER clauses affect the physical order of columns in the datafile. Use FIRST to add a column in the first (leftmost) position, or AFTER followed by a column name to add the new column in any other position.
Do you need alter privilege for ALTER TABLE?
Executing the ALTER TABLE statement generally requires at least the ALTER privilege for the table or the database.. If you are renaming a table, then it also requires the DROP, CREATE and INSERT privileges for the table or the database as well. Online DDL is supported with the ALGORITHM and LOCK clauses.
How to delete a file per table table in MariaDB?
DISCARD TABLESPACE to discard the new table’s tablespace: Then, copy the .ibd and .cfg files from the original server to the relevant directory on the target MariaDB Server: File-per-table tablespaces can be imported with just the .ibd file in many cases.
How to import tablespaces from partitioned tables in MariaDB?
IMPORT TABLESPACE to import the new table’s tablespace: Currently, MariaDB does not directly support the transport of tablespaces from partitioned tables. See MDEV-10568 for more information about that. It is still possible to transport partitioned tables if we use a workaround.
Can you change the name of a column in MariaDB?
Works like MODIFY COLUMN except that you can also change the name of the column. The column will be at the same place as the original column and all index on the column will be kept. This lets you change column options.