saffron.ext
Class ExtentTable

java.lang.Object
  |
  +--saffron.ext.AbstractTable
        |
        +--saffron.ext.ExtentTable

All Implemented Interfaces:

Table

public class ExtentTable

extends AbstractTable

ExtentTable is a relational expression formed by all of the instances of a given class. It is transformed into an ExtentRel.

Field Summary

Fields inherited from class saffron.ext.AbstractTable

name, rowType, schema

Constructor Summary

ExtentTable(Schema schema, String name, Type rowType)

Method Summary

Rel	toRel(Cluster cluster, Expression schemaExp) Converts this table into a relational expression.

Methods inherited from class saffron.ext.AbstractTable

getName, getQualifiedName, getRowCount, getRowType, getSchema

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtentTable

public ExtentTable(Schema schema,
                   String name,
                   Type rowType)

Method Detail

toRel

public Rel toRel(Cluster cluster,
                 Expression schemaExp)

Description copied from interface: Table

Converts this table into a relational expression. This relational expression can then be optimized by applying rules to transform it into other access methods for this table.

Parameters:

cluster - the cluster this Rel will belong to

schemaExp - the parse tree of the expression which evaluates to a connection object