Class: SQLEqualityChecker

Defined in: lang-sql/src/visitors/equality-checker.ts:13

Extends the core EqualityChecker with structural equality checks for SQL-specific plan operators: LangSwitch, Using, and TableAlias.

Extends

• EqualityChecker

Implements

• SQLPlanVisitor<boolean, EcDescentArgs>

Constructors

Constructor

new SQLEqualityChecker(vmap): SQLEqualityChecker

Defined in: lang-sql/src/visitors/equality-checker.ts:17

Parameters

Parameter	Type
vmap	Record<string, PlanVisitor<boolean, EcDescentArgs>>

Returns

SQLEqualityChecker

Overrides

EqualityChecker.constructor

Properties

vmap

protected vmap: Record<string, PlanVisitor<boolean, EcDescentArgs>>

Defined in: core/dist/visitors/equality-checker.d.ts:20

Per-language visitor map used for recursive descent.

Inherited from

EqualityChecker.vmap

Methods

areEqual()

areEqual(op1, op2, options?): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:47

if options.renameMap is provided, it will be used to rename the items in the op2 before comparing.

Parameters

Parameter	Type
op1	OpOrId
op2	OpOrId
options?	{ ignoreLang?: boolean; renameMap?: RenameMap; }
options.ignoreLang?	boolean
options.renameMap?	RenameMap

Returns

boolean

Inherited from

EqualityChecker.areEqual

---

maybeRename()

protected maybeRename(id, renameMap?): ASTIdentifier

Defined in: core/dist/visitors/equality-checker.d.ts:28

Returns id renamed according to renameMap, or id unchanged when the map is absent or does not contain an entry for id.

Parameters

Parameter	Type
id	ASTIdentifier
renameMap?	RenameMap

Returns

ASTIdentifier

Inherited from

EqualityChecker.maybeRename

---

processArray()

protected processArray(arrA, arrB, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:43

Returns true only when arrA and arrB have the same length and every element pair compares equal via processItem.

Parameters

Parameter	Type
arrA	OpOrId[]
arrB	OpOrId[]
args	EcDescentArgs

Returns

boolean

Inherited from

EqualityChecker.processArray

---

processItem()

protected processItem(operator, __namedParameters): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:34

Compares operator against other, optionally applying renameMap to identifiers from other. Handles the special case where one side is a bare identifier and the other is an identity FnCall(ret1, [id]).

Parameters

Parameter	Type
operator	OpOrId
__namedParameters	{ ignoreLang: boolean; other: OpOrId; renameMap?: RenameMap; }
__namedParameters.ignoreLang	boolean
__namedParameters.other	OpOrId
__namedParameters.renameMap?	RenameMap

Returns

boolean

Inherited from

EqualityChecker.processItem

---

visitAggregate()

visitAggregate(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:75

Parameters

Parameter	Type
a	AggregateCall
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitAggregate

Inherited from

EqualityChecker.visitAggregate

---

visitBidirectionalRecursion()

visitBidirectionalRecursion(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:81

Parameters

Parameter	Type
a	BidirectionalRecursion
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitBidirectionalRecursion

Inherited from

EqualityChecker.visitBidirectionalRecursion

---

visitCalculation()

visitCalculation(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:58

Parameters

Parameter	Type
a	Calculation
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitCalculation

Inherited from

EqualityChecker.visitCalculation

---

visitCartesianProduct()

visitCartesianProduct(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:60

Parameters

Parameter	Type
a	CartesianProduct
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitCartesianProduct

Inherited from

EqualityChecker.visitCartesianProduct

---

visitConditional()

visitConditional(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:59

Parameters

Parameter	Type
a	Conditional
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitConditional

Inherited from

EqualityChecker.visitConditional

---

visitDifference()

visitDifference(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:72

Parameters

Parameter	Type
a	Difference
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitDifference

Inherited from

EqualityChecker.visitDifference

---

visitDistinct()

visitDistinct(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:73

Parameters

Parameter	Type
a	Distinct
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitDistinct

Inherited from

EqualityChecker.visitDistinct

---

visitFnCall()

visitFnCall(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:56

Parameters

Parameter	Type
a	FnCall
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitFnCall

Inherited from

EqualityChecker.visitFnCall

---

visitGroupBy()

visitGroupBy(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:67

Parameters

Parameter	Type
a	GroupBy
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitGroupBy

Inherited from

EqualityChecker.visitGroupBy

---

visitIndexedRecursion()

visitIndexedRecursion(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:80

Parameters

Parameter	Type
a	IndexedRecursion
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitIndexedRecursion

Inherited from

EqualityChecker.visitIndexedRecursion

---

visitIndexScan()

visitIndexScan(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:79

Parameters

Parameter	Type
a	IndexScan
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitIndexScan

Inherited from

EqualityChecker.visitIndexScan

---

visitIntersection()

visitIntersection(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:71

Parameters

Parameter	Type
a	Intersection
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitIntersection

Inherited from

EqualityChecker.visitIntersection

---

visitItemFnSource()

visitItemFnSource(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:76

Parameters

Parameter	Type
a	ItemFnSource
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitItemFnSource

Inherited from

EqualityChecker.visitItemFnSource

---

visitItemSource()

visitItemSource(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:55

Parameters

Parameter	Type
a	ItemSource
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitItemSource

Inherited from

EqualityChecker.visitItemSource

---

visitJoin()

visitJoin(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:61

Parameters

Parameter	Type
a	Join
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitJoin

Inherited from

EqualityChecker.visitJoin

---

visitLangSwitch()

visitLangSwitch(a, args): boolean

Defined in: lang-sql/src/visitors/equality-checker.ts:20

Parameters

Parameter	Type
a	LangSwitch
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitLangSwitch

---

visitLimit()

visitLimit(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:68

Parameters

Parameter	Type
a	Limit
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitLimit

Inherited from

EqualityChecker.visitLimit

---

visitLiteral()

visitLiteral(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:57

Parameters

Parameter	Type
a	Literal
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitLiteral

Inherited from

EqualityChecker.visitLiteral

---

visitMapFromItem()

visitMapFromItem(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:64

Parameters

Parameter	Type
a	MapFromItem
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitMapFromItem

Inherited from

EqualityChecker.visitMapFromItem

---

visitMapToItem()

visitMapToItem(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:63

Parameters

Parameter	Type
a	MapToItem
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitMapToItem

Inherited from

EqualityChecker.visitMapToItem

---

visitNullSource()

visitNullSource(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:74

Parameters

Parameter	Type
a	NullSource
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitNullSource

Inherited from

EqualityChecker.visitNullSource

---

visitOrderBy()

visitOrderBy(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:66

Parameters

Parameter	Type
a	OrderBy
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitOrderBy

Inherited from

EqualityChecker.visitOrderBy

---

visitProjection()

visitProjection(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:52

Parameters

Parameter	Type
a	Projection
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitProjection

Inherited from

EqualityChecker.visitProjection

---

visitProjectionConcat()

visitProjectionConcat(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:62

Parameters

Parameter	Type
a	ProjectionConcat
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitProjectionConcat

Inherited from

EqualityChecker.visitProjectionConcat

---

visitProjectionIndex()

visitProjectionIndex(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:65

Parameters

Parameter	Type
a	ProjectionIndex
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitProjectionIndex

Inherited from

EqualityChecker.visitProjectionIndex

---

visitQuantifier()

visitQuantifier(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:78

Parameters

Parameter	Type
a	Quantifier
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitQuantifier

Inherited from

EqualityChecker.visitQuantifier

---

visitRecursion()

visitRecursion(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:51

Parameters

Parameter	Type
a	Recursion
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitRecursion

Inherited from

EqualityChecker.visitRecursion

---

visitSelection()

visitSelection(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:53

Parameters

Parameter	Type
a	Selection
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitSelection

Inherited from

EqualityChecker.visitSelection

---

visitSetOp()

protected visitSetOp(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:69

Parameters

Parameter	Type
a	SetOperator
args	EcDescentArgs

Returns

boolean

Inherited from

EqualityChecker.visitSetOp

---

visitTableAlias()

visitTableAlias(operator, arg?): boolean

Defined in: lang-sql/src/visitors/equality-checker.ts:33

Parameters

Parameter	Type
operator	TableAlias
arg?	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitTableAlias

---

visitTupleFnSource()

visitTupleFnSource(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:77

Parameters

Parameter	Type
a	TupleFnSource
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitTupleFnSource

Inherited from

EqualityChecker.visitTupleFnSource

---

visitTupleSource()

visitTupleSource(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:54

Parameters

Parameter	Type
a	TupleSource
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitTupleSource

Inherited from

EqualityChecker.visitTupleSource

---

visitUnion()

visitUnion(a, args): boolean

Defined in: core/dist/visitors/equality-checker.d.ts:70

Parameters

Parameter	Type
a	Union
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitUnion

Inherited from

EqualityChecker.visitUnion

---

visitUsing()

visitUsing(a, args): boolean

Defined in: lang-sql/src/visitors/equality-checker.ts:24

Parameters

Parameter	Type
a	Using
args	EcDescentArgs

Returns

boolean

Implementation of

SQLPlanVisitor.visitUsing