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→Mapping Data Types, Metadata
===Mapping Data Types, Metadata===
* Mapping Overview
: Because data types in SQL and data types in the Java programming language are not identical, there needs to be some mechanism for transferring data between an application using Java types and a database using SQL types. (Note that the phrase "Java types," as used in this book, stands for "types in the Java programming language.")[http://download.oracle.com/javase/1.3/docs/guide/jdbc/getstart/mapping.html]
: Mapping - Postgre [http://postgresql.1045698.n5.nabble.com/PostgreSQL-data-types-mapped-Java-classes-for-JDBC-td3205204.html]
* Data Types
: Bytea - Binary - hex
: bit & bit varying - for storing binaries [http://www.postgresql.org/docs/8.1/static/datatype-bit.html]
: BLOBs [http://www.postgresql.org/files/documentation/books/aw_pgsql/node96.html]
===Functions===
