net.sf.farrago.namespace.jdbc
Class MedJdbcMetadataProvider

java.lang.Object
  org.eigenbase.rel.metadata.ReflectiveRelMetadataProvider
      net.sf.farrago.namespace.jdbc.MedJdbcMetadataProvider

All Implemented Interfaces:

RelMetadataProvider, ReflectiveVisitor

public class MedJdbcMetadataProvider
extends ReflectiveRelMetadataProvider

MedJdbcMetadataProvider supplies metadata to the optimizer about JDBC relational expressions.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/namespace/jdbc/MedJdbcMetadataProvider.java#7 $

Author:

John Sichi

Constructor Summary

MedJdbcMetadataProvider()

Method Summary

Boolean	areColumnsUnique(MedJdbcQueryRel rel, BitSet columns, boolean ignoreNulls)
Boolean	canRestart(MedJdbcQueryRel rel)
Set<BitSet>	getUniqueKeys(MedJdbcQueryRel rel)

Methods inherited from class org.eigenbase.rel.metadata.ReflectiveRelMetadataProvider

getRelMetadata, mapParameterTypes

Methods inherited from class java.lang.Object

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

Constructor Detail

MedJdbcMetadataProvider

public MedJdbcMetadataProvider()

Method Detail

canRestart

public Boolean canRestart(MedJdbcQueryRel rel)

getUniqueKeys

public Set<BitSet> getUniqueKeys(MedJdbcQueryRel rel)

areColumnsUnique

public Boolean areColumnsUnique(MedJdbcQueryRel rel,
                                BitSet columns,
                                boolean ignoreNulls)