11.5 The JDBC Optional Package for the CDC
Due to the resource limits of mobile devices, we can support only part of the JDBC API on J2ME. The CDC JDBC optional package is a rich subset of JDBC v3.0. In particular, the following standard JDBC features are not supported.Connection pools.The ParameterMetaData interface.Setting parameters by name in the CallableStatement interface.SQL 99 types (the Struct, Array, Ref, SQLData, SQLInput, and SQLOutput interfaces).Custom type mapping (the setTypeMap() and getTypeMap() methods).
The J2ME subset of JDBC is supported by most mobile database vendors. In addition to the standard interfaces, vendors provide performance and productivity features to distinguish themselves from competitors. In the next several sections, we look at mobile database solutions from leading vendors. |
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