Class: TableAlias

Defined in: lang-sql/src/plan/table-alias.ts:14

Plan operator that renames all attributes of a table or function source under a single alias, making them addressable as alias.column.

Remarks

Replaced in-place by a Projection during schema inference (see SchemaInferrer.visitTableAlias).

Extends

• PlanTupleOperator

Constructors

Constructor

new TableAlias(lang, alias, source): TableAlias

Defined in: lang-sql/src/plan/table-alias.ts:15

Parameters

Parameter	Type	Description
lang	Lowercase<string>	-
alias	ASTIdentifier	The identifier used as the new relation name for all output attributes.
source	LangSwitch | TupleSource | TupleFnSource	The underlying tuple source being aliased.

Returns

TableAlias

Overrides

PlanTupleOperator.constructor

Properties

alias

alias: ASTIdentifier

Defined in: lang-sql/src/plan/table-alias.ts:18

The identifier used as the new relation name for all output attributes.

---

lang

lang: Lowercase<string>

Defined in: core/dist/plan/visitor.d.ts:36

PlanOperator.lang

Inherited from

PlanTupleOperator.lang

---

parent?

optional parent?: PlanOperator

Defined in: core/dist/plan/visitor.d.ts:38

PlanOperator.parent

Inherited from

PlanTupleOperator.parent

---

schema

schema: ASTIdentifier[]

Defined in: core/dist/plan/visitor.d.ts:32

Ordered list of attribute identifiers produced by this operator.

Inherited from

PlanTupleOperator.schema

---

schemaSet

schemaSet: IdSet

Defined in: core/dist/plan/visitor.d.ts:34

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

Inherited from

PlanTupleOperator.schemaSet

---

source

source: LangSwitch | TupleSource | TupleFnSource

Defined in: lang-sql/src/plan/table-alias.ts:20

The underlying tuple source being aliased.

Methods

accept()

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

Defined in: lang-sql/src/plan/table-alias.ts:29

Dispatches this operator to the SQL plan visitor.

Type Parameters

Type Parameter
Ret
Arg

Parameters

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

Returns

Ret

Overrides

PlanTupleOperator.accept

---

addToSchema()

addToSchema(item): void

Defined in: core/dist/plan/visitor.d.ts:46

will preserve object references

Parameters

Parameter	Type
item	ASTIdentifier | ASTIdentifier[] | IdSet

Returns

void

Inherited from

PlanTupleOperator.addToSchema

---

clearSchema()

clearSchema(): void

Defined in: core/dist/plan/visitor.d.ts:50

will preserve object references

Returns

void

Inherited from

PlanTupleOperator.clearSchema

---

clone()

clone(): TableAlias

Defined in: lang-sql/src/plan/table-alias.ts:48

Returns a deep copy with a cloned source and copied schema.

Returns

TableAlias

Overrides

PlanTupleOperator.clone

---

getChildren()

getChildren(): PlanOperator[]

Defined in: lang-sql/src/plan/table-alias.ts:44

Returns [source].

Returns

PlanOperator[]

Overrides

PlanTupleOperator.getChildren

---

getDependencies()

getDependencies(): IdSet

Defined in: core/dist/plan/visitor.d.ts:54

PlanOperator.getDependencies

Returns

IdSet

Inherited from

PlanTupleOperator.getDependencies

---

removeFromSchema()

removeFromSchema(item): boolean

Defined in: core/dist/plan/visitor.d.ts:48

will preserve object references

Parameters

Parameter	Type
item	ASTIdentifier | ASTIdentifier[] | IdSet

Returns

boolean

Inherited from

PlanTupleOperator.removeFromSchema

---

replaceChild()

replaceChild(current, replacement): void

Defined in: lang-sql/src/plan/table-alias.ts:36

Replaces the current source with replacement.

Parameters

Parameter	Type
current	PlanTupleOperator
replacement	PlanTupleOperator

Returns

void

Overrides

PlanTupleOperator.replaceChild