FunctionMultiReturn
User defined functions can return a result set,
and can therefore be used like a table.
This sample application uses such a function to convert
polar to cartesian coordinates.
| Methods |
|---|
| static void |
main(String... args)
This method is called when executing this sample application from the
command line.
|
| static void |
main(String... args) throws Exception
This method is called when executing this sample application from the
command line.
Parameters:
args - the command line parameters
|
| static ResultSet |
polar2Cartesian(Double r, Double alpha)
Convert polar coordinates to cartesian coordinates.
|
| static ResultSet |
polar2Cartesian(Double r, Double alpha)
Convert polar coordinates to cartesian coordinates. The function may be
called twice, once to retrieve the result columns (with null parameters),
and the second time to return the data.
Parameters:
r - the distance from the point 0/0
alpha - the angle
Returns:
a result set with two columns: x and y
|
| static Object[] |
polar2CartesianArray(Double r, Double alpha)
Convert polar coordinates to cartesian coordinates.
|
| static Object[] |
polar2CartesianArray(Double r, Double alpha)
Convert polar coordinates to cartesian coordinates. The function may be
called twice, once to retrieve the result columns (with null parameters),
and the second time to return the data.
Parameters:
r - the distance from the point 0/0
alpha - the angle
Returns:
an array two values: x and y
|
| static ResultSet |
polar2CartesianSet(Connection conn, String query)
Convert a set of polar coordinates to cartesian coordinates.
|
| static ResultSet |
polar2CartesianSet(Connection conn, String query) throws SQLException
Convert a set of polar coordinates to cartesian coordinates. The function
may be called twice, once to retrieve the result columns (with null
parameters), and the second time to return the data.
Parameters:
conn - the connection
query - the query
Returns:
a result set with the coordinates
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