Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the names of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).

Note:This method cannot be called on a PreparedStatement or CallableStatement.

Parameters:

sql		an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.
columnNames		an array of the names of the columns that should be returned from the inserted row

Returns:  either the row count for INSERT, UPDATE, or DELETE statements, or 0 for SQL statements that return nothing

Exceptions:

SQLException		if a database access error occurs, this method is called on a closed Statement, the SQL statement returns a ResultSet object, the second argument supplied to this method is not a String array whose elements are valid column names, the method is called on a PreparedStatement or CallableStatement
SQLFeatureNotSupportedException		if the JDBC driver does not support this method
SQLTimeoutException		when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement

Since:  1.4