In the source code for each supported dialect below, you will see calls to registerColumnType(type, String). The type is a java.sql.Types constant, and String can represent the supported database type for the database. Additionally, you may see calls to registerColumnType(type, int, String) where the int is a maximum length for this mapping. When no maximum length is specified this is the "default" mapping. If a source database contains a field whose length exceeds any destination type mapping, the "default" mapping is used.

Axion
DB2
Derby
Firebird
Frontbase
HyperSonic
Ingres
McKoi
MySQL
Oracle
Pointbase
PostgreSQL
MS SQL-Server