org.eigenbase.sarg
Interface SargExpr

All Known Implementing Classes:

SargIntervalExpr, SargSetExpr

public interface SargExpr

SargExpr represents an expression defining a possibly non-contiguous search subset of a scalar domain of a given datatype.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sarg/SargExpr.java#9 $

Author:

John V. Sichi

Method Summary

void	collectDynamicParams(Set<RexDynamicParam> dynamicParams) Collects all dynamic parameters referenced by this expression.
SargIntervalSequence	evaluate() Resolves this expression into a fixed SargIntervalSequence.
SargIntervalSequence	evaluateComplemented() Resolves the complement of this expression into a fixed SargIntervalSequence.
RelDataType	getDataType()
SargFactory	getFactory()
String	toString() Overrides the default Object.toString.

Method Detail

toString

String toString()

Overrides the default Object.toString. The result must be safe for use in a RelNode digest.

Overrides:

toString in class Object

getDataType

RelDataType getDataType()

Returns:

datatype for coordinates of search domain

evaluate

SargIntervalSequence evaluate()

Resolves this expression into a fixed SargIntervalSequence.

TODO jvs 17-Jan-2006: add binding for dynamic params so they can be evaluated as well

Returns:

immutable ordered sequence of disjoint intervals

evaluateComplemented

SargIntervalSequence evaluateComplemented()

Resolves the complement of this expression into a fixed SargIntervalSequence.

Returns:

immutable ordered sequence of disjoint intervals

getFactory

SargFactory getFactory()

Returns:

the factory which produced this expression

collectDynamicParams

void collectDynamicParams(Set<RexDynamicParam> dynamicParams)

Collects all dynamic parameters referenced by this expression.

Parameters:

dynamicParams - receives dynamic parameter references