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public interface Ref
The mapping in the Java programming language of an SQL REF value, which is a reference to an SQL structured type value in the database.
SQL REF values are stored in a table that contains instances of a referenceable SQL structured type, and each REF value is a unique identifier for one instance in that table. An SQL REF value may be used in place of the SQL structured type it references, either as a column value in a table or an attribute value in a structured type.
Because an SQL REF value is a logical pointer to an SQL structured type, a Ref object is by default also a logical pointer. Thus, retrieving an SQL REF value as a Ref object does not materialize the attributes of the structured type on the client.
A Ref object can be stored in the database using the PreparedStatement.setRef method.
All methods on the Ref interface must be fully implemented if the JDBC driver supports the data type.
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Since:
- 1.2
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See Also:
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Struct
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