Class DeduplicateExpressions

Optimize the computation described by a MetricsPlan by de-duplicating Expression nodes when possible. This is not guaranteed to de-duplicate all duplicate nodes.

Inheritance

Object

LoggingTransformerBase

DeduplicateExpressions

Implements

IMetricsPlanTransformer

Inherited Members

LoggingTransformerBase.Logger

LoggingTransformerBase.TransformerName

LoggingTransformerBase.Transform(MetricsPlan, IMetricsPlanValidator)

Object.Equals(Object)

Object.Equals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Object.ReferenceEquals(Object, Object)

Object.ToString()

Namespace: Mangrove.MetricSetTransformers

Assembly: MetricSetTransformers.dll

Syntax

public class DeduplicateExpressions : LoggingTransformerBase, IMetricsPlanTransformer

Remarks

While the current implementation of this logic is not especially comprehensive, it (and any more robust implementations in the future) will all guarantee to satisfy the following set of assumptions:

1. Not create new ColumnReference nodes.
2. Never create a less computationally efficient MetricsPlan.
3. For at least some compute fabrics, create a more computationally efficient MetricsPlan.

Constructors

DeduplicateExpressions(ILogger)

Declaration

public DeduplicateExpressions(ILogger logger)

Parameters

Type	Name	Description
ILogger	logger

Methods

TransformWithTracing(MetricsPlan, IMetricsPlanValidator)

Declaration

public override MetricsPlan TransformWithTracing(MetricsPlan metricsPlan, IMetricsPlanValidator validator)

Parameters

Type	Name	Description
MetricsPlan	metricsPlan
IMetricsPlanValidator	validator

Returns

Type	Description
MetricsPlan

Overrides

LoggingTransformerBase.TransformWithTracing(MetricsPlan, IMetricsPlanValidator)

Implements

IMetricsPlanTransformer

Extension Methods

ObjectExtensions.EventId(Object)