| The representation (mapping) in the Java programming language of an SQL ROWID
value. An SQL ROWID is a built-in type, a value of which can be thought of as
an address for its identified row in a database table. Whether that address
is logical or, in any respects, physical is determined by its originating data
source.
Methods in the interfaces ResultSet, CallableStatement,
and PreparedStatement, such as getRowId and setRowId
allow a programmer to access a SQL ROWID value. The RowId
interface provides a method
for representing the value of the ROWID as a byte array or as a
String.
The method getRowIdLifetime in the interface DatabaseMetaData,
can be used
to determine if a RowId object remains valid for the duration of the transaction in
which the RowId was created, the duration of the session in which
the RowId was created,
or, effectively, for as long as its identified row is not deleted. In addition
to specifying the duration of its valid lifetime outside its originating data
source, getRowIdLifetime specifies the duration of a ROWID
value's valid lifetime
within its originating data source. In this, it differs from a large object,
because there is no limit on the valid lifetime of a large object within its
originating data source.
All methods on the RowId interface must be fully implemented if the
JDBC driver supports the data type. |
