net.sf.saffron.sql2rel
Class SqlToRelConverter.NullDefaultValueFactory

java.lang.Object
  |
  +--net.sf.saffron.sql2rel.SqlToRelConverter.NullDefaultValueFactory

All Implemented Interfaces:

DefaultValueFactory

Enclosing class:

SqlToRelConverter

class SqlToRelConverter.NullDefaultValueFactory

extends Object

implements DefaultValueFactory

An implementation of DefaultValueFactory which always supplies NULL.

Constructor Summary

(package private)

SqlToRelConverter.NullDefaultValueFactory()

Method Summary

RexNode

newDefaultValue(SaffronTable table, int iColumn) Create an expression which evaluates to the default value for a particular column.

Methods inherited from class java.lang.Object

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

Constructor Detail

SqlToRelConverter.NullDefaultValueFactory

SqlToRelConverter.NullDefaultValueFactory()

Method Detail

newDefaultValue

public RexNode newDefaultValue(SaffronTable table,
                               int iColumn)

Description copied from interface: DefaultValueFactory

Create an expression which evaluates to the default value for a particular column.

Specified by:

newDefaultValue in interface DefaultValueFactory

Parameters:

table - the table containing the column

iColumn - the 0-based offset of the column in the table

Returns:

default value expression