net.sf.farrago.query
Class FarragoExecutableExplainStmt

java.lang.Object
  org.eigenbase.util.CompoundClosableAllocation
      net.sf.farrago.util.FarragoCompoundAllocation
          net.sf.farrago.query.FarragoExecutableStmtImpl
              net.sf.farrago.query.FarragoExecutableExplainStmt

All Implemented Interfaces:

FarragoSessionExecutableStmt, FarragoAllocation, FarragoAllocationOwner, ClosableAllocation, ClosableAllocationOwner

 class FarragoExecutableExplainStmt
extends FarragoExecutableStmtImpl

FarragoExecutableExplainStmt implements FarragoSessionExecutableStmt for an EXPLAIN PLAN statement.

NOTE: be sure to read superclass warnings before modifying this class.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/query/FarragoExecutableExplainStmt.java#15 $

Author:

John V. Sichi

Field Summary

private String

explanation

Fields inherited from class net.sf.farrago.query.FarragoExecutableStmtImpl

tracer

Fields inherited from class org.eigenbase.util.CompoundClosableAllocation

allocations

Constructor Summary

FarragoExecutableExplainStmt(RelDataType dynamicParamRowType, String explanation)

Method Summary

ResultSet	execute(FarragoSessionRuntimeContext runtimeContext) Executes this statement.
long	getMemoryUsage()
RelDataType	getRowType()

Methods inherited from class net.sf.farrago.query.FarragoExecutableStmtImpl

getDynamicParamRowType, getIterCalcTypeMap, getReferencedObjectIds, getReferencedObjectModTime, getResultSetTypeMap, getTableAccessMap, getTableModOp, isDml

Methods inherited from class org.eigenbase.util.CompoundClosableAllocation

addAllocation, closeAllocation, forgetAllocation, hasAllocations

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eigenbase.util.ClosableAllocationOwner

addAllocation

Methods inherited from interface org.eigenbase.util.ClosableAllocation

closeAllocation

Methods inherited from interface org.eigenbase.util.ClosableAllocation

closeAllocation

Field Detail

explanation

private final String explanation

Constructor Detail

FarragoExecutableExplainStmt

FarragoExecutableExplainStmt(RelDataType dynamicParamRowType,
                             String explanation)

Method Detail

getRowType

public RelDataType getRowType()

Returns:

type descriptor for rows produced by this stmt

execute

public ResultSet execute(FarragoSessionRuntimeContext runtimeContext)

Description copied from interface: FarragoSessionExecutableStmt

Executes this statement.

Parameters:

runtimeContext - context in which to execute

Returns:

ResultSet produced by statement

getMemoryUsage

public long getMemoryUsage()

Returns:

approximate total number of bytes used by this statement's in-memory representation