net.sf.farrago.namespace.mql
Class MedMqlColumnSet

java.lang.Object
  org.eigenbase.relopt.RelOptAbstractTable
      net.sf.farrago.namespace.impl.MedAbstractColumnSet
          net.sf.farrago.namespace.mql.MedMqlColumnSet

All Implemented Interfaces:

FarragoMedColumnSet, FarragoQueryColumnSet, RelOptTable, SqlValidatorTable

 class MedMqlColumnSet
extends MedAbstractColumnSet

MedMqlColumnSet provides an implementation of the FarragoMedColumnSet interface for MQL.

Version:

$Id: //open/dev/farrago/ext/mql/src/net/sf/farrago/namespace/mql/MedMqlColumnSet.java#3 $

Author:

John V. Sichi

Field Summary

(package private) String	metawebType
(package private) MedMqlDataServer	server
(package private) String	udxSpecificName

Fields inherited from class org.eigenbase.relopt.RelOptAbstractTable

name, rowType, schema

Constructor Summary

MedMqlColumnSet(MedMqlDataServer server, String[] localName, RelDataType rowType, String metawebType, String udxSpecificName)

Method Summary

RelNode

toRel(RelOptCluster cluster, RelOptConnection connection) Converts this table into a relational expression.

Methods inherited from class net.sf.farrago.namespace.impl.MedAbstractColumnSet

getAllowedAccess, getColumnPropertyMap, getCwmColumnSet, getForeignName, getLocalName, getMonotonicity, getPreparingStmt, getQualifiedName, getTableProperties, setAllowedAccess, setCwmColumnSet, setPreparingStmt, toLenientRel, toUdxRel

Methods inherited from class org.eigenbase.relopt.RelOptAbstractTable

getCollationList, getName, getRelOptSchema, getRowCount, getRowType, setRowType

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eigenbase.relopt.RelOptTable

getCollationList, getRelOptSchema, getRowCount, getRowType

Methods inherited from interface org.eigenbase.sql.validate.SqlValidatorTable

getRowType

Field Detail

server

final MedMqlDataServer server

metawebType

final String metawebType

udxSpecificName

final String udxSpecificName

Constructor Detail

MedMqlColumnSet

MedMqlColumnSet(MedMqlDataServer server,
                String[] localName,
                RelDataType rowType,
                String metawebType,
                String udxSpecificName)

Method Detail

toRel

public RelNode toRel(RelOptCluster cluster,
                     RelOptConnection connection)

Description copied from interface: RelOptTable

Converts this table into a relational expression.

The planner calls this method to convert a table into an initial relational expression, generally something abstract, such as a TableAccessRel, then optimizes this expression by applying rules to transform it into more efficient access methods for this table.

Parameters:

cluster - the cluster the relational expression will belong to

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