net.sf.farrago.namespace.jdbc
Class MedJdbcQueryRel

java.lang.Object
  org.eigenbase.rel.AbstractRelNode
      org.eigenbase.rel.jdbc.JdbcQuery
          net.sf.farrago.namespace.jdbc.MedJdbcQueryRel

All Implemented Interfaces:

Cloneable, JavaRel, ResultSetRel, RelNode

public class MedJdbcQueryRel
extends JdbcQuery

MedJdbcQueryRel adapts JdbcQuery to the SQL/MED framework.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/namespace/jdbc/MedJdbcQueryRel.java#19 $

Author:

John V. Sichi

Field Summary

(package private) MedJdbcColumnSet	columnSet
(package private) RelOptConnection	connection
(package private) SqlDialect	dialect
(package private) Set<BitSet>	uniqueKeys

Fields inherited from class org.eigenbase.rel.jdbc.JdbcQuery

queryString

Fields inherited from class org.eigenbase.rel.AbstractRelNode

digest, id, rowType, traits

Fields inherited from interface org.eigenbase.rel.RelNode

emptyArray

Constructor Summary

MedJdbcQueryRel(MedJdbcColumnSet columnSet, RelOptCluster cluster, RelDataType rowType, RelOptConnection connection, SqlDialect dialect, SqlSelect sql)

MedJdbcQueryRel(MedJdbcColumnSet columnSet, RelOptCluster cluster, RelDataType rowType, RelOptConnection connection, SqlDialect dialect, SqlSelect sql, Set<BitSet> uniqueKeys)

Method Summary

MedJdbcQueryRel	clone() Clones this RelNode.
ParseTree	implement(JavaRelImplementor implementor) Creates a plan for this expression according to a calling convention.

Methods inherited from class org.eigenbase.rel.jdbc.JdbcQuery

computeSelfCost, explain, getConnection, getDataSource, getForeignSql, getSql, onRegister, register

Methods inherited from class org.eigenbase.rel.AbstractRelNode

childrenAccept, cloneTraits, collectVariablesSet, collectVariablesUsed, computeDigest, deriveRowType, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getInputs, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraits, getVariablesStopped, inheritTraitsFrom, isAccessTo, isDistinct, isValid, recomputeDigest, registerCorrelVariable, replaceInput, setCorrelVariable, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eigenbase.rel.RelNode

childrenAccept, collectVariablesSet, collectVariablesUsed, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getInputs, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraits, getVariablesStopped, isAccessTo, isDistinct, isValid, recomputeDigest, registerCorrelVariable, replaceInput, setCorrelVariable

Field Detail

columnSet

MedJdbcColumnSet columnSet

connection

RelOptConnection connection

dialect

SqlDialect dialect

uniqueKeys

Set<BitSet> uniqueKeys

Constructor Detail

MedJdbcQueryRel

public MedJdbcQueryRel(MedJdbcColumnSet columnSet,
                       RelOptCluster cluster,
                       RelDataType rowType,
                       RelOptConnection connection,
                       SqlDialect dialect,
                       SqlSelect sql)

MedJdbcQueryRel

public MedJdbcQueryRel(MedJdbcColumnSet columnSet,
                       RelOptCluster cluster,
                       RelDataType rowType,
                       RelOptConnection connection,
                       SqlDialect dialect,
                       SqlSelect sql,
                       Set<BitSet> uniqueKeys)

Method Detail

implement

public ParseTree implement(JavaRelImplementor implementor)

Description copied from interface: JavaRel

Creates a plan for this expression according to a calling convention.

Specified by:

implement in interface JavaRel

Overrides:

implement in class JdbcQuery

Parameters:

implementor - implementor

clone

public MedJdbcQueryRel clone()

Description copied from interface: RelNode

Clones this RelNode.

Traits of the RelNode must be explicitly cloned, using AbstractRelNode.inheritTraitsFrom(AbstractRelNode), as the RelNode may have traits of which it has no knowledge. Example implementation:

     public MyRelNode clone()
     {
         MyRelNode clone = new MyRelNode(...);
         clone.inheritTraitsFrom(this);
         return clone;
     }
 

N.B.: This method must be overridden whenever an existing, concrete RelNode is extended. Otherwise, calling clone() will produce a differently typed RelNode, resulting in invalid or incorrect query plans.

Specified by:

clone in interface RelNode

Overrides:

clone in class JdbcQuery

Returns:

a clone of this RelNode