Java Doc for FunctionMultiReturn.java in  » Database-DBMS » h2database » org » h2 » samples » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » h2database » org.h2.samples   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.h2.samples.FunctionMultiReturn FunctionMultiReturn public class FunctionMultiReturn (Code) 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. Method Summary public static  void main(String[] args)      public static  ResultSet polar2Cartesian(Double r, Double alpha)      Convert polar coordinates to cartesian coordinates. public static  Object[] polar2CartesianArray(Double r, Double alpha)      Convert polar coordinates to cartesian coordinates. public static  ResultSet polar2CartesianSet(Connection conn, String query)      Convert a set of polar coordinates to cartesian coordinates. Method Detail main public static void main(String[] args) throws Exception(Code) polar2Cartesian public static ResultSet polar2Cartesian(Double r, Double alpha) throws SQLException(Code) 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 Parameters:   alpha - the angle a result set with two columns: x and y polar2CartesianArray public static Object[] polar2CartesianArray(Double r, Double alpha) throws SQLException(Code) 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 Parameters:   alpha - the angle an array two values: x and y polar2CartesianSet public static ResultSet polar2CartesianSet(Connection conn, String query) throws SQLException(Code) 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 Parameters:   query - the query a result set with the coordinates Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)