Class: ProjectionConcat

Defined in: packages/core/src/plan/operators/tuple/projection.ts:108

dependent join, mapping can introduce columns which override the source

Extends

• PlanTupleOperator

Constructors

Constructor

new ProjectionConcat(lang, mapping, outer, source): ProjectionConcat

Defined in: packages/core/src/plan/operators/tuple/projection.ts:118

Parameters

Parameter	Type	Description
lang	Lowercase<string>	-
mapping	PlanTupleOperator	mapping must be interpreted in the context of the source
outer	boolean	When true, rows from source with no matching mapping rows are still emitted (outer join).
source	PlanTupleOperator	Tuple operator providing the driving rows.

Returns

ProjectionConcat

Overrides

PlanTupleOperator.constructor

Properties

emptyVal

emptyVal: Trie<string | number | symbol, unknown>

Defined in: packages/core/src/plan/operators/tuple/projection.ts:112

empty value for the outer join (default is null)

---

lang

lang: Lowercase<string>

Defined in: packages/core/src/plan/visitor.ts:42

PlanOperator.lang

Inherited from

PlanTupleOperator.lang

---

mapping

mapping: PlanTupleOperator

Defined in: packages/core/src/plan/operators/tuple/projection.ts:121

mapping must be interpreted in the context of the source

---

outer

outer: boolean

Defined in: packages/core/src/plan/operators/tuple/projection.ts:123

When true, rows from source with no matching mapping rows are still emitted (outer join).

---

parent?

optional parent?: PlanOperator

Defined in: packages/core/src/plan/visitor.ts:44

PlanOperator.parent

Inherited from

PlanTupleOperator.parent

---

schema

schema: ASTIdentifier[]

Defined in: packages/core/src/plan/visitor.ts:38

Ordered list of attribute identifiers produced by this operator.

Inherited from

PlanTupleOperator.schema

---

schemaSet

schemaSet: IdSet

Defined in: packages/core/src/plan/visitor.ts:40

Trie-backed set of the same paths as schema; used for O(k) membership tests.

Inherited from

PlanTupleOperator.schemaSet

---

source

source: PlanTupleOperator

Defined in: packages/core/src/plan/operators/tuple/projection.ts:125

Tuple operator providing the driving rows.

---

validateSingleValue

validateSingleValue: boolean = false

Defined in: packages/core/src/plan/operators/tuple/projection.ts:116

if true, the mapping is not allowed to return multiple values per one source value

Methods

accept()

accept<Ret, Arg>(visitors, arg?): Ret

Defined in: packages/core/src/plan/operators/tuple/projection.ts:138

PlanOperator.accept

Type Parameters

Type Parameter
Ret
Arg

Parameters

Parameter	Type
visitors	Record<string, PlanVisitor<Ret, Arg>>
arg?	Arg

Returns

Ret

Overrides

PlanTupleOperator.accept

---

addToSchema()

addToSchema(item): void

Defined in: packages/core/src/plan/visitor.ts:57

will preserve object references

Parameters

Parameter	Type
item	IdSet | ASTIdentifier | ASTIdentifier[]

Returns

void

Inherited from

PlanTupleOperator.addToSchema

---

clearSchema()

clearSchema(): void

Defined in: packages/core/src/plan/visitor.ts:102

will preserve object references

Returns

void

Inherited from

PlanTupleOperator.clearSchema

---

clone()

clone(): ProjectionConcat

Defined in: packages/core/src/plan/operators/tuple/projection.ts:165

PlanOperator.clone

Returns

ProjectionConcat

Overrides

PlanTupleOperator.clone

---

getChildren()

getChildren(): PlanOperator[]

Defined in: packages/core/src/plan/operators/tuple/projection.ts:161

PlanOperator.getChildren

Returns

PlanOperator[]

Overrides

PlanTupleOperator.getChildren

---

getDependencies()

getDependencies(): IdSet

Defined in: packages/core/src/plan/visitor.ts:113

PlanOperator.getDependencies

Returns

IdSet

Inherited from

PlanTupleOperator.getDependencies

---

removeFromSchema()

removeFromSchema(item): boolean

Defined in: packages/core/src/plan/visitor.ts:80

will preserve object references

Parameters

Parameter	Type
item	IdSet | ASTIdentifier | ASTIdentifier[]

Returns

boolean

Inherited from

PlanTupleOperator.removeFromSchema

---

replaceChild()

replaceChild(current, replacement): void

Defined in: packages/core/src/plan/operators/tuple/projection.ts:145

PlanOperator.replaceChild

Parameters

Parameter	Type
current	PlanTupleOperator
replacement	PlanTupleOperator

Returns

void

Overrides

PlanTupleOperator.replaceChild