Package org.postgresql.pljava.example.annotation

Class RecordParameterDefaults

java.lang.Object

org.postgresql.pljava.example.annotation.RecordParameterDefaults

All Implemented Interfaces:

ResultSetProvider

public class RecordParameterDefaults
extends Object
implements ResultSetProvider

Example demonstrating the use of a RECORD parameter as a way to supply an arbitrary sequence of named, typed parameters to a PL/Java function.

Also tests the proper DDR generation of defaults for such parameters.

Nested Class Summary

Nested classes/interfaces inherited from interface org.postgresql.pljava.ResultSetProvider

ResultSetProvider.Large

Method Summary

Modifier and Type	Method	Description
boolean	assignRowValues(ResultSet receiver, int currentRow)
void	close()
static String	paramDefaultsNamedRow(ResultSet userWithNum)	Like paramDefaultsRecord but illustrating the use of a named row type with known structure, and supplying a default for the function parameter.
static ResultSetProvider	paramDefaultsRecord(ResultSet params)	Return the names, types, and values of parameters supplied as a single anonymous RECORD type; the parameter is given an empty-record default, allowing it to be omitted in calls, or used with the named-parameter call syntax.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.postgresql.pljava.ResultSetProvider

assignRowValues

Method Details

paramDefaultsRecord

@Function(schema="javatest",
          out={"name text","pgtypename text","javaclass text","tostring text"})
public static ResultSetProvider paramDefaultsRecord(@SQLType(defaultValue={})
 ResultSet params)
                                             throws SQLException

Return the names, types, and values of parameters supplied as a single anonymous RECORD type; the parameter is given an empty-record default, allowing it to be omitted in calls, or used with the named-parameter call syntax.

For example, this function could be called as:

 SELECT (paramDefaultsRecord()).*;

or as:

 SELECT (paramDefaultsRecord(params => s)).*
 FROM (SELECT 42 AS a, '42' AS b, 42.0 AS c) AS s;

Throws:

SQLException

paramDefaultsNamedRow

@Function(requires="foobar tables",
          schema="javatest")
public static String paramDefaultsNamedRow(@SQLType(value="javatest.foobar_2",defaultValue={"bob","42"})
 ResultSet userWithNum)
                                    throws SQLException

Like paramDefaultsRecord but illustrating the use of a named row type with known structure, and supplying a default for the function parameter.

 SELECT paramDefaultsNamedRow();

 SELECT paramDefaultsNamedRow(userWithNum => ('fred', 3.14));

Throws:

SQLException

assignRowValues

public boolean assignRowValues(ResultSet receiver,
 int currentRow)
                        throws SQLException

Specified by:

assignRowValues in interface ResultSetProvider

Throws:

SQLException

close

public void close()
           throws SQLException

Specified by:

close in interface ResultSetProvider

Throws:

SQLException