web server - Borland Technical Publications

Container-managed data access support
By default, the Borland CMP engine does not automatically map cmp-field to LOBs. If
you intend to use LOB data types, you must inform the CMP engine explicitely in the
ejb-borland.xml deployment descriptor. You do this by setting the Column Property
createColumnSql. For example:
CLOB-column
createColumnSql
String>
CLOB
BLOB-column
createColumnSql
String>
BLOB
Container-created tables
You can instruct the Borland EJB Container to automatically create tables for
container-managed entities based on the entity's container-managed fields by enabling
the create-tables property. Because table creation and data type mappings vary
among vendors, you must specify the JDBC database dialect in the deployment
descriptor to the Container. For all databases (except for JDataStore) if you specify the
dialect, then the Container automatically creates tables for container-managed entities
for you if the create-tables property is set to true. The Container will not create these
tables unless you specify the dialect.
The following table shows the names or values for the different dialects (case is
ignored for these values):
Database Name
JDataStore
Oracle
Sybase
MSSQLServer
DB2
Interbase
Informix
Dialect Value
jdatastore
oracle
sybase
mssqlserver
db2
interbase
informix
Chapter 17: EJB-QL and Data Access Support 161