Class ActorRdfJoinSelectivityVariableCounting

A comunica Variable Counting RDF Join Selectivity Actor. Based on the "variable counting predicates" heuristic from "SPARQL basic graph pattern optimization using selectivity estimation."

Hierarchy (View Summary)

ActorRdfJoinSelectivity
- ActorRdfJoinSelectivityVariableCounting

Index

Constructors

constructor

new ActorRdfJoinSelectivityVariableCounting(
    args: IActorArgs<
        IActionRdfJoinSelectivity,
        IMediatorTypeAccuracy,
        IActorRdfJoinSelectivityOutput,
    >,
): ActorRdfJoinSelectivityVariableCounting
Parameters
- args: IActorArgs<
      IActionRdfJoinSelectivity,
      IMediatorTypeAccuracy,
      IActorRdfJoinSelectivityOutput,
  >
Returns ActorRdfJoinSelectivityVariableCounting
Overrides ActorRdfJoinSelectivity.constructor
- Defined in actor-rdf-join-selectivity-variable-counting/lib/ActorRdfJoinSelectivityVariableCounting.ts:17

Properties

`Readonly`beforeActors

beforeActors: Actor<
    IActionRdfJoinSelectivity,
    IMediatorTypeAccuracy,
    IActorRdfJoinSelectivityOutput,
    undefined,
>[] = []

Actor that must be registered in the bus before this actor.

`Readonly`bus

bus: Bus<
    Actor<
        IActionRdfJoinSelectivity,
        IMediatorTypeAccuracy,
        IActorRdfJoinSelectivityOutput,
        undefined,
    >,
    IActionRdfJoinSelectivity,
    IMediatorTypeAccuracy,
    IActorRdfJoinSelectivityOutput,
    undefined,
>

The bus this actor subscribes to.

`Readonly`name

name: string

The name for this actor.

Default

{<rdf:subject>}

`Static`MAX_PAIRWISE_COST

MAX_PAIRWISE_COST: number = ...

Methods

`Protected`getDefaultLogData

getDefaultLogData(context: IActionContext, data?: () => any): any
Parameters
- context: IActionContext
- Optionaldata: () => any
Returns any
Inherited from ActorRdfJoinSelectivity.getDefaultLogData
- Defined in core/lib/Actor.ts:95

`Protected`logDebug

logDebug(context: IActionContext, message: string, data?: () => any): void
Parameters
- context: IActionContext
- message: string
- Optionaldata: () => any
Returns void
Inherited from ActorRdfJoinSelectivity.logDebug
- Defined in core/lib/Actor.ts:108

`Protected`logError

logError(context: IActionContext, message: string, data?: () => any): void
Parameters
- context: IActionContext
- message: string
- Optionaldata: () => any
Returns void
Inherited from ActorRdfJoinSelectivity.logError
- Defined in core/lib/Actor.ts:129

`Protected`logFatal

logFatal(context: IActionContext, message: string, data?: () => any): void
Parameters
- context: IActionContext
- message: string
- Optionaldata: () => any
Returns void
Inherited from ActorRdfJoinSelectivity.logFatal
- Defined in core/lib/Actor.ts:136

`Protected`logInfo

logInfo(context: IActionContext, message: string, data?: () => any): void
Parameters
- context: IActionContext
- message: string
- Optionaldata: () => any
Returns void
Inherited from ActorRdfJoinSelectivity.logInfo
- Defined in core/lib/Actor.ts:115

`Protected`logTrace

logTrace(context: IActionContext, message: string, data?: () => any): void
Parameters
- context: IActionContext
- message: string
- Optionaldata: () => any
Returns void
Inherited from ActorRdfJoinSelectivity.logTrace
- Defined in core/lib/Actor.ts:101

`Protected`logWarn

logWarn(context: IActionContext, message: string, data?: () => any): void
Parameters
- context: IActionContext
- message: string
- Optionaldata: () => any
Returns void
Inherited from ActorRdfJoinSelectivity.logWarn
- Defined in core/lib/Actor.ts:122

run

run(action: IActionRdfJoinSelectivity): Promise<IActorRdfJoinSelectivityOutput>
Run the given action on this actor.

In most cases, this method should not be called directly. Instead, #runObservable should be called.
Parameters
- action: IActionRdfJoinSelectivity
  The action to run.
Returns Promise<IActorRdfJoinSelectivityOutput>
A promise that resolves to the run result.
Overrides ActorRdfJoinSelectivity.run
- Defined in actor-rdf-join-selectivity-variable-counting/lib/ActorRdfJoinSelectivityVariableCounting.ts:319

runObservable

runObservable(
action: IActionRdfJoinSelectivity,
sideData: undefined,
): Promise<IActorRdfJoinSelectivityOutput>
Run the given action on this actor AND invokes the Bus#onRun method.
Parameters
- action: IActionRdfJoinSelectivity
  The action to run.
- sideData: undefined
Returns Promise<IActorRdfJoinSelectivityOutput>
A promise that resolves to the run result.
Inherited from ActorRdfJoinSelectivity.runObservable
- Defined in core/lib/Actor.ts:87

test

test(
_action: IActionRdfJoinSelectivity,
): Promise<TestResult<IMediatorTypeAccuracy>>
Check if this actor can run the given action, without actually running it.
Parameters
- _action: IActionRdfJoinSelectivity
Returns Promise<TestResult<IMediatorTypeAccuracy>>
A promise that resolves to the test result.
Overrides ActorRdfJoinSelectivity.test
- Defined in actor-rdf-join-selectivity-variable-counting/lib/ActorRdfJoinSelectivityVariableCounting.ts:23

`Static`getContextLogger

getContextLogger(context: IActionContext): undefined | Logger
Get the logger from the given context.
Parameters
- context: IActionContext
  An optional context.
Returns undefined | Logger
The logger or undefined.
Inherited from ActorRdfJoinSelectivity.getContextLogger
- Defined in core/lib/Actor.ts:56

`Static`getJoinTypes

getJoinTypes(
operation1: Pattern | Path,
operation2: Pattern | Path,
): JoinTypes[]
Parameters
- operation1: Pattern | Path
- operation2: Pattern | Path
Returns JoinTypes[]
- Defined in actor-rdf-join-selectivity-variable-counting/lib/ActorRdfJoinSelectivityVariableCounting.ts:44

`Static`getOperationsJoinCost

getOperationsJoinCost(operations: Operation[]): number
Parameters
- operations: Operation[]
Returns number
- Defined in actor-rdf-join-selectivity-variable-counting/lib/ActorRdfJoinSelectivityVariableCounting.ts:281

`Static`getOperationsPairwiseJoinCost

getOperationsPairwiseJoinCost(
operation1: Pattern | Path,
operation2: Pattern | Path,
): number
Parameters
- operation1: Pattern | Path
- operation2: Pattern | Path
Returns number
- Defined in actor-rdf-join-selectivity-variable-counting/lib/ActorRdfJoinSelectivityVariableCounting.ts:171

`Static`getPatternCost

getPatternCost(pattern: Pattern | Path): number
Parameters
- pattern: Pattern | Path
Returns number
- Defined in actor-rdf-join-selectivity-variable-counting/lib/ActorRdfJoinSelectivityVariableCounting.ts:27

Class ActorRdfJoinSelectivityVariableCounting

Hierarchy (View Summary)

Index

Constructors

Properties

Methods

Constructors

constructor

Parameters

Returns ActorRdfJoinSelectivityVariableCounting

Properties

ReadonlybeforeActors

Readonlybus

Readonlyname

Default

StaticMAX_PAIRWISE_COST

Methods

ProtectedgetDefaultLogData

Parameters

Returns any

ProtectedlogDebug

Parameters

Returns void

ProtectedlogError

Parameters

Returns void

ProtectedlogFatal

Parameters

Returns void

ProtectedlogInfo

Parameters

Returns void

ProtectedlogTrace

Parameters

Returns void

ProtectedlogWarn

Parameters

Returns void

run

Parameters

Returns Promise<IActorRdfJoinSelectivityOutput>

runObservable

Parameters

Returns Promise<IActorRdfJoinSelectivityOutput>

test

Parameters

Returns Promise<TestResult<IMediatorTypeAccuracy>>

StaticgetContextLogger

Parameters

Returns undefined | Logger

StaticgetJoinTypes

Parameters

Returns JoinTypes[]

StaticgetOperationsJoinCost

Parameters

Returns number

StaticgetOperationsPairwiseJoinCost

Parameters

Returns number

StaticgetPatternCost

Parameters

Returns number

Settings

On This Page

`Readonly`beforeActors

`Readonly`bus

`Readonly`name

`Static`MAX_PAIRWISE_COST

`Protected`getDefaultLogData

`Protected`logDebug

`Protected`logError

`Protected`logFatal

`Protected`logInfo

`Protected`logTrace

`Protected`logWarn

`Static`getContextLogger

`Static`getJoinTypes

`Static`getOperationsJoinCost

`Static`getOperationsPairwiseJoinCost

`Static`getPatternCost