A database column. If true, the value of attribute is unique and used as a primary key identifier. A persistent Java class managed by Cayenne. Defines arbitrary SQL statement. Note that SQL statement can be customized for different SQL dialects per DbAdapter class. If no adapter-specific statement is found, the one with no adapter label is used by default. A generic property used by other elements. Used to install the Automatic Sequence/Key Generation facility for db-entity. This feature is intended for use with simple (non-compound) integral primary keys. Specifies the Key Generation Method that will be employed 'ORACLE' - use Oracle's SEQUENCE 'NAMED_SEQUENCE_TABLE' - use USER designated SEQUENCE TABLE. User specifies the name of a DBMS Table with the schema (sequence INT) which will be used to hold sequence values (not supported yet) For db-generator-type ORACLE this is the name of the ORACLE SEQUENCE to use. The SEQUENCE is assumed to already exist in the Database. If this is db-generator-type NAMED_SEQUENCE_TABLE Key Generation, this specifies the name of the SEQUENCE TABLE to use. The NAMED_SEQUENCE_TABLE is assumed to already exist in the database. Size of key cache. For db-generator-type ORACLE , this value MUST match the Oracle SEQUENCE INCREMENT value. If there is a mismatch between this value and the Oracle SEQUENCE INCREMENT value, then there will likely be duplicate key problems. For db-generator-type NAMED_SEQUENCE_TABLE , this tells how many keys the Container will fetch in a single DBMS call.