Class: Optimizer

Defined in: packages/core/src/optimizer/optimizer.ts:17

Optimizer for query plans.

Constructors

Constructor

new Optimizer(config, db): Optimizer

Defined in: packages/core/src/optimizer/optimizer.ts:23

Parameters

Parameter	Type	Description
config	OptimizerConfig	-
db	DortDBAsFriend	Internal database interface passed to rule constructors.

Returns

Optimizer

Properties

config

protected config: OptimizerConfig

Defined in: packages/core/src/optimizer/optimizer.ts:21

Active optimizer configuration.

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db

protected db: DortDBAsFriend

Defined in: packages/core/src/optimizer/optimizer.ts:26

Internal database interface passed to rule constructors.

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rules

protected rules: PatternRule<PlanOperator, any>[]

Defined in: packages/core/src/optimizer/optimizer.ts:19

Instantiated rule objects derived from the current config.

Methods

breakReferences()

protected breakReferences(operator): void

Defined in: packages/core/src/optimizer/optimizer.ts:96

Ensures parent and child operators do not share the same schema array or schema-set reference.

Parameters

Parameter	Type
operator	PlanOperator

Returns

void

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optimize()

optimize(plan): PlanOperator

Defined in: packages/core/src/optimizer/optimizer.ts:50

Optimize the given query plan.

Parameters

Parameter	Type	Description
plan	PlanOperator	The query plan to optimize.

Returns

PlanOperator

The optimized query plan.

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reconfigure()

reconfigure(config): void

Defined in: packages/core/src/optimizer/optimizer.ts:35

Reconfigure the optimizer with a new set of rules.

Parameters

Parameter	Type	Description
config	OptimizerConfig	The new configuration to apply.

Returns

void

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visitOperator()

protected visitOperator(operator, rule): void

Defined in: packages/core/src/optimizer/optimizer.ts:66

Visit an operator and apply the given rule. Recursively applies the rule to child operators.

Parameters

Parameter	Type	Description
operator	PlanOperator	The operator to visit.
rule	PatternRule	The rule to apply.

Returns

void