15.10 - PERMANENT - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

Teradata Database
Release Number
December 2015
English (United States)
Last Update

Number of bytes to be reserved for permanent storage for database_name. The space is taken from unallocated space in the database or user of the immediate owner.

You must specify a value for this option. There is no default.

The only significant difference between a Teradata Database user and a database is that you can specify a password for a user, but not for a database.
You can enter the number of bytes as an integer, decimal, or floating point value or as a constant expression whose evaluation determines the number of bytes. You can also enter the value using exponential notation. For example, you can write one thousand as either 1000 or 1E3.
n cannot exceed the spool space parameter in the profile of the creator. If no spool space is defined for that profile, then Teradata Database uses the spool space limit defined for the individual user-creator.
Optional keyword that redundantly specifies the unit for the amount of space allowed.
constant_expression BYTES
A constant expression is any SQL expression that does not make any column references. Specifying an appropriate constant expression for the PERM space size of a database enables Teradata Database to assign an optimal quantity of PERM space that scales to the size of your system by allocating PERM space on a per AMP basis.
When you specify a PERM space size based on a constant expression, the assigned size does not automatically scale if, for example, you add more AMPs to your system.

Example: Using a Constant Expression to Specify the PERM and SPOOL Space for a Database

The following request creates PERM space for database production_development with a size based on the constant expression 2,000,000 * (HASHAMP()+1) and SPOOL with a size based on the constant expression 2,000,000 * (HASHAMP()+1). The expressions calculate the number of AMPs in the current system and scales the PERM and SPOOL space for the production_development database to that size.

     CREATE DATABASE production_development AS
       DEFAULT DATABASE = it_dev,
       PASSWORD = (EXPIRE = 0),
       PERM = 2000000*(HASHAMP()+1),
       SPOOL = 2000000*(HASHAMP()+1);