In MySQL 8.0, partitioning support is not actually
provided by the MySQL Server, but rather by a table storage
engine's own or native partitioning handler. In MySQL
8.0, only the
NDB storage engines provide
native partitioning handlers. This means that partitioned tables
cannot be created using any other storage engine than these.
(You must be using MySQL NDB Cluster with the
NDB storage engine to create
InnoDB storage engine.
InnoDB foreign keys and MySQL
partitioning are not compatible. Partitioned
InnoDB tables cannot have foreign key
references, nor can they have columns referenced by foreign
InnoDB tables which have or which are
referenced by foreign keys cannot be partitioned.
TABLE ... OPTIMIZE PARTITION does not work correctly
with partitioned tables that use
ALTER TABLE ... REBUILD PARTITION and
ALTER TABLE ... ANALYZE PARTITION, instead,
for such tables. For more information, see
ALTER TABLE Partition Operations.
User-defined partitioning and the NDB storage engine (NDB Cluster).
LINEAR KEY) is the only type of
partitioning supported for the
NDB storage engine. It is not
possible under normal circumstances in NDB Cluster to create
an NDB Cluster table using any partitioning type other than
attempting to do so fails with an error.
Exception (not for production): It is
possible to override this restriction by setting the
new system variable on NDB
Cluster SQL nodes to
ON. If you choose to do
this, you should be aware that tables using partitioning types
[LINEAR] KEY are not supported in
production. In such cases, you can create and use
tables with partitioning types other than
LINEAR KEY, but you do this entirely at
your own risk.
The maximum number of partitions that can be defined for an
NDB table depends on the number of
data nodes and node groups in the cluster, the version of the
NDB Cluster software in use, and other factors. See
NDB and user-defined partitioning,
for more information.
The maximum amount of fixed-size data that can be stored per
partition in an
NDB table is 128 TB.
Previously, this was 16 GB.
CREATE TABLE and
TABLE statements that would cause a user-partitioned
NDB table not to meet either or
both of the following two requirements are not permitted, and
fail with an error:
The table must have an explicit primary key.
All columns listed in the table's partitioning expression must be part of the primary key.
If a user-partitioned
is created using an empty column-list (that is, using
PARTITION BY KEY() or
LINEAR KEY()), then no explicit primary key is
Partition selection is not supported for
NDB tables. See
Partition Selection, for more
Upgrading partitioned tables.
When performing an upgrade, tables which are partitioned by
KEY must be dumped and reloaded.
Partitioned tables using storage engines other than
InnoDB cannot be upgraded from MySQL 5.7 or
earlier to MySQL 8.0 or later; you must either drop the
partitioning from such tables with
ALTER TABLE ...
REMOVE PARTITIONING or convert them to
ALTER TABLE ...
ENGINE=INNODB prior to the upgrade.
For information about converting
Converting Tables from MyISAM to InnoDB.