org.eigenbase.rel
Class WindowedAggregateRel

java.lang.Object
  org.eigenbase.rel.AbstractRelNode
      org.eigenbase.rel.SingleRel
          org.eigenbase.rel.WindowedAggregateRel

All Implemented Interfaces:

Cloneable, RelNode

public final class WindowedAggregateRel
extends SingleRel

A relational expression representing a set of window aggregates.

Rules:

• Created by WindowedAggSplitterRule.
• Triggers FennelWindowRule.

  Field Summary

  RexProgram

  program

  Fields inherited from class org.eigenbase.rel.AbstractRelNode

  digest, id, nextId, rowType, traits

  Fields inherited from interface org.eigenbase.rel.RelNode

  emptyArray

  Constructor Summary

  WindowedAggregateRel(RelOptCluster cluster, RelTraitSet traits, RelNode child, RexProgram program, RelDataType rowType)
  Creates a WindowedAggregateRel.

  Method Summary

  WindowedAggregateRel	clone() Clones this RelNode.
  void	explain(RelOptPlanWriter pw)
  RexProgram	getProgram()
  boolean	isValid(boolean fail) Returns whether this relational expression is valid.

  Methods inherited from class org.eigenbase.rel.SingleRel

  childrenAccept, deriveRowType, getChild, getInputs, getRows, replaceInput

  Methods inherited from class org.eigenbase.rel.AbstractRelNode

  cloneTraits, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getOrCreateCorrelVariable, getQuery, getRelTypeName, getRowType, getTable, getTraits, getVariablesStopped, inheritTraitsFrom, isAccessTo, isDistinct, onRegister, recomputeDigest, register, registerCorrelVariable, setCorrelVariable, toString

  Methods inherited from class java.lang.Object

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

  Field Detail

  program

  public final RexProgram program

  Constructor Detail

  WindowedAggregateRel

  public WindowedAggregateRel(RelOptCluster cluster,
                              RelTraitSet traits,
                              RelNode child,
                              RexProgram program,
                              RelDataType rowType)

  Creates a WindowedAggregateRel.

  Parameters:

  cluster -

  traits -

  child -

  program - Program containing an array of expressions. The program must not have a condition, and each expression must be either a RexLocalRef, or a RexOver whose arguments are all RexLocalRef.

  rowType -

  Method Detail

  isValid

  public boolean isValid(boolean fail)

  Description copied from interface: RelNode

  Returns whether this relational expression is valid.

  If assertions are enabled, this method is typically called with fail = true, as follows:

  assert rel.isValid(true)

  This signals that the method can throw an AssertionError if it is not valid.

  Specified by:

  isValid in interface RelNode

  Overrides:

  isValid in class AbstractRelNode

  Parameters:

  fail - Whether to fail if invalid

  Returns:

  Whether relational expression is valid

  getProgram

  public RexProgram getProgram()

  explain

  public void explain(RelOptPlanWriter pw)

  Specified by:

  explain in interface RelNode

  Overrides:

  explain in class SingleRel

  clone

  public WindowedAggregateRel 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

  Specified by:

  clone in class AbstractRelNode

  Returns:

  a clone of this RelNode