public interface RowIdThe 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
PreparedStatement, such as
setRowIdallow a programmer to access a SQL
RowIdinterface provides a method for representing the value of the
ROWIDas a byte array or as a
getRowIdLifetimein the interface
DatabaseMetaData, can be used to determine if a
RowIdobject remains valid for the duration of the transaction in which the
RowIdwas created, the duration of the session in which the
RowIdwas 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,
getRowIdLifetimespecifies the duration of a
ROWIDvalue'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
RowIdinterface must be fully implemented if the JDBC driver supports the data type.
- See Also:
Modifier and Type Method Description
equals(Object obj)Compares this
RowIdto the specified object.
getBytes()Returns an array of bytes representing the value of the SQL
ROWIDdesignated by this
hashCode()Returns a hash code value of this
toString()Returns a String representing the value of the SQL ROWID designated by this
boolean equals(Object obj)Compares this
RowIdto the specified object. The result is
trueif and only if the argument is not null and is a RowId object that represents the same ROWID as this object.
It is important to consider both the origin and the valid lifetime of a
RowIdwhen comparing it to another
RowId. If both are valid, and both are from the same table on the same data source, then if they are equal they identify the same row; if one or more is no longer guaranteed to be valid, or if they originate from different data sources, or different tables on the same data source, they may be equal but still not identify the same row.
ROWIDdesignated by this
- an array of bytes, whose length is determined by the driver supplying the connection, representing the value of the ROWID designated by this java.sql.RowId object.
String toString()Returns a String representing the value of the SQL ROWID designated by this
java.sql.Date.toString()returns the contents of its DATE as the
String"2004-03-17" rather than as DATE literal in SQL (which would have been the
StringDATE "2004-03-17"), toString() returns the contents of its ROWID in a form specific to the driver supplying the connection, and possibly not as a