# SYSALIASES system table

Describes the procedures, functions, and user-defined types in the database.

Column Name | Type | Length | Nullability | Contents
--- | --- | --- | --- | ---
ALIASID | CHAR | 36 | false | Unique identifier for the alias
ALIAS | VARCHAR | 128 | false | Alias (in the case of a user-defined type, the name of the user-defined type)
SCHEMAID | CHAR | 36 | true | Reserved for future use
JAVACLASSNAME | LONGVARCHAR | 255 | false | The Java class name
ALIASTYPE | CHAR | 1 | false | 'F' (function), 'P' (procedure), 'A' (user-defined type)
NAMESPACE | CHAR | 1 | false | 'F' (function), 'P' (procedure), 'A' (user-defined type)
SYSTEMALIAS | BOOLEAN |  | false | true (system supplied or built-in alias) false (alias created by a user)
ALIASINFO | org.apache.derby. catalog.AliasInfo This class is not part of the public API. |  | true | A Java interface that encapsulates the additional information that is specific to an alias
SPECIFICNAME | VARCHAR | 128 | false | System-generated identifier

Parent topic: Derby system tables