SQLJ data conversion

When you use SQLJ with existing databases, the data conversion (or mapping) from tables to objects and back must be performed in the application or the application server. This is illustrated in the diagram where you see the mapping layer above the JDBC interface. SQLJ sits on top of JDBC. The diagram also shows that this mapping may also occur in multiple locations. For more information on this data conversion, see the description of the mapping layer (new window) and mapping SQL and Java data types (new window).

Also see when to use SQLJ with Java application servers.

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