Class: ProjConcatToJoin

Defined in: packages/core/src/optimizer/rules/remove-projection-concat.ts:15

Converts a non-correlated projection concatenation into a join or cartesian product operator.

Implements

• PatternRule<ProjectionConcat>

Constructors

Constructor

new ProjConcatToJoin(db): ProjConcatToJoin

Defined in: packages/core/src/optimizer/rules/remove-projection-concat.ts:20

Parameters

Parameter	Type	Description
db	DortDBAsFriend	Internal database interface.

Returns

ProjConcatToJoin

Properties

db

protected db: DortDBAsFriend

Defined in: packages/core/src/optimizer/rules/remove-projection-concat.ts:22

Internal database interface.

---

operator

operator: typeof ProjectionConcat = ProjectionConcat

Defined in: packages/core/src/optimizer/rules/remove-projection-concat.ts:16

The operator this rule starts matching at.

Implementation of

PatternRule.operator

---

tdepsVmap

protected tdepsVmap: Record<string, TransitiveDependencies>

Defined in: packages/core/src/optimizer/rules/remove-projection-concat.ts:18

Per-language transitive-dependency visitor instances.

Methods

match()

match(node): PatternRuleMatchResult<unknown>

Defined in: packages/core/src/optimizer/rules/remove-projection-concat.ts:26

Matches the given plan operator against this rule.

Parameters

Parameter	Type	Description
node	ProjectionConcat	The plan operator to match.

Returns

PatternRuleMatchResult<unknown>

Implementation of

PatternRule.match

---

transform()

transform(node, bindings): PlanOperator

Defined in: packages/core/src/optimizer/rules/remove-projection-concat.ts:33

Transforms the given plan operator using the provided bindings.

Parameters

Parameter	Type	Description
node	ProjectionConcat	The plan operator to transform.
bindings	any	The bindings to use for the transformation.

Returns

PlanOperator

Implementation of

PatternRule.transform