Some database objects such as tables and indexes have different
limitations when using the
NDBCLUSTER
storage engine:
Identifiers.
Database names, table names and attribute names cannot be
as long in NDB
tables as when
using other table handlers. Attribute names are truncated
to 31 characters, and if not unique after truncation give
rise to errors. Database names and table names can total a
maximum of 122 characters. In other words, the maximum
length for an NDB
table name
is 122 characters, less the number of characters in the
name of the database of which that table is a part.
Table names containing special characters.
NDB
tables whose names
contain characters other than letters, numbers, dashes,
and underscores and which are created on one SQL node may
not be discovered correctly by other SQL nodes.
(Bug#31470)
Number of tables and other database objects.
The maximum number of tables in a Cluster database in
MySQL 4.1 is limited to 1792. The maximum
number of all
NDBCLUSTER
database objects
in a single MySQL Cluster — including databases,
tables, and indexes — is limited to 20320.
Attributes per table. The maximum number of attributes (that is, columns and indexes) per table is limited to 128.
Attributes per key. The maximum number of attributes per key is 32.
Row size.
The maximum permitted size of any one row is 8052 bytes.
Each BLOB
or
TEXT
column contributes 256
+ 8 = 264 bytes towards this total.
User Comments
Add your own comment.