| Column Name | Type | Length | Nullability | Contents | 
|---|---|---|---|---|
| ALIASID | CHAR | 36 | false | unique identifier for the alias | 
| ALIAS | VARCHAR | 128 | false | alias | 
| SCHEMAID | CHAR | 36 | true | reserved for future use | 
| JAVACLASSNAME | LONGVARCHAR | 255 | false | the Java class name | 
| ALIASTYPE | CHAR | 1 | false | 'F' (function)'P' (procedure) | 
| NAMESPACE | CHAR | 1 | false | 'F' (function)'P' (procedure) | 
| SYSTEMALIAS | BOOLEAN | false | true (system supplied or built-in alias) false (alias created by a user) | |
| ALIASINFO | org.apache.derby. 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 |