Class: ASTDeterministicStringifier

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:58

Converts a Cypher AST into a deterministic string, used to generate stable cache keys and computed-column aliases during logical plan building. Embedded LangSwitch sub-expressions are replaced with opaque lang_<lang>_<N> placeholders; uniqueId is incremented on each encounter to keep them unique within one traversal.

Implements

• CypherVisitor<string>

Constructors

Constructor

new ASTDeterministicStringifier(): ASTDeterministicStringifier

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:62

Returns

ASTDeterministicStringifier

Properties

uniqueId

protected uniqueId: number = 0

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:60

Counter appended to LangSwitch placeholders to keep them unique within one traversal.

Methods

addQuotes()

protected addQuotes(str, quot): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:106

Wraps str in quot, doubling any existing occurrences of that character.

Parameters

Parameter	Type
str	string
quot	""" | "'" | "`"

Returns

string

---

processAttr()

protected processAttr(x): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:82

Serializes an aliased AST pair as expr AS alias.

Parameters

Parameter	Type
x	Aliased<ASTNode>

Returns

string

---

processNode()

protected processNode(x): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:70

Dispatches x through this visitor and returns its string form.

Parameters

Parameter	Type
x	ASTNode

Returns

string

---

processNodeOrAttr()

protected processNodeOrAttr(x): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:74

Returns '*' unchanged, serializes an aliased pair as expr AS alias, or dispatches a bare node.

Parameters

Parameter	Type
x	"*" | ASTNode | Aliased<ASTNode>

Returns

string

---

visitBooleanLiteral()

visitBooleanLiteral(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:124

Parameters

Parameter	Type
node	ASTBooleanLiteral

Returns

string

Implementation of

CypherVisitor.visitBooleanLiteral

---

visitCaseExpr()

visitCaseExpr(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:203

Parameters

Parameter	Type
node	CaseExpr

Returns

string

Implementation of

CypherVisitor.visitCaseExpr

---

visitCountAll()

visitCountAll(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:210

Parameters

Parameter	Type
node	CountAll

Returns

string

Implementation of

CypherVisitor.visitCountAll

---

visitCreateClause()

visitCreateClause(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:242

Parameters

Parameter	Type
node	CreateClause

Returns

string

Implementation of

CypherVisitor.visitCreateClause

---

visitCypherIdentifier()

visitCypherIdentifier(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:102

Parameters

Parameter	Type
node	CypherIdentifier

Returns

string

Implementation of

CypherVisitor.visitCypherIdentifier

---

visitDeleteClause()

visitDeleteClause(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:273

Parameters

Parameter	Type
node	DeleteClause

Returns

string

Implementation of

CypherVisitor.visitDeleteClause

---

visitExistsSubquery()

visitExistsSubquery(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:142

Parameters

Parameter	Type
node	ExistsSubquery

Returns

string

Implementation of

CypherVisitor.visitExistsSubquery

---

visitFnCallWrapper()

visitFnCallWrapper(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:127

Parameters

Parameter	Type
node	FnCallWrapper

Returns

string

Implementation of

CypherVisitor.visitFnCallWrapper

---

visitFunction()

visitFunction(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:311

Not implemented in the base class; subclasses must override.

Parameters

Parameter	Type
node	ASTFunction

Returns

string

Throws

Always throws Error('Method not implemented.').

Implementation of

CypherVisitor.visitFunction

---

visitIdentifier()

visitIdentifier(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:98

Parameters

Parameter	Type
node	ASTIdentifier

Returns

string

Implementation of

CypherVisitor.visitIdentifier

---

visitLabelFilterExpr()

visitLabelFilterExpr(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:213

Parameters

Parameter	Type
node	LabelFilterExpr

Returns

string

Implementation of

CypherVisitor.visitLabelFilterExpr

---

visitLangSwitch()

visitLangSwitch(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:319

Returns an opaque lang_<lang>_<N> placeholder and increments uniqueId, producing a stable unique alias for the embedded sub-expression without recursing into it.

Parameters

Parameter	Type
node	LangSwitch

Returns

string

Implementation of

CypherVisitor.visitLangSwitch

---

visitListComprehension()

visitListComprehension(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:197

Parameters

Parameter	Type
node	ListComprehension

Returns

string

Implementation of

CypherVisitor.visitListComprehension

---

visitListLiteral()

visitListLiteral(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:115

Parameters

Parameter	Type
node	ASTListLiteral

Returns

string

Implementation of

CypherVisitor.visitListLiteral

---

visitLiteral()

visitLiteral<T>(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:301

Not implemented in the base class; subclasses must override.

Type Parameters

Type Parameter
T

Parameters

Parameter	Type
node	ASTLiteral<T>

Returns

string

Throws

Always throws Error('Method not implemented.').

Implementation of

CypherVisitor.visitLiteral

---

visitMapLiteral()

visitMapLiteral(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:118

Parameters

Parameter	Type
node	ASTMapLiteral

Returns

string

Implementation of

CypherVisitor.visitMapLiteral

---

visitMatchClause()

visitMatchClause(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:233

Parameters

Parameter	Type
node	MatchClause

Returns

string

Implementation of

CypherVisitor.visitMatchClause

---

visitMergeClause()

visitMergeClause(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:245

Parameters

Parameter	Type
node	MergeClause

Returns

string

Implementation of

CypherVisitor.visitMergeClause

---

visitNodePattern()

visitNodePattern(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:155

Parameters

Parameter	Type
node	NodePattern

Returns

string

Implementation of

CypherVisitor.visitNodePattern

---

visitNumberLiteral()

visitNumberLiteral(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:112

Parameters

Parameter	Type
node	ASTNumberLiteral

Returns

string

Implementation of

CypherVisitor.visitNumberLiteral

---

visitOperator()

visitOperator(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:304

Parameters

Parameter	Type
node	ASTOperator

Returns

string

Implementation of

CypherVisitor.visitOperator

---

visitOrderItem()

visitOrderItem(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:287

Parameters

Parameter	Type
node	OrderItem

Returns

string

Implementation of

CypherVisitor.visitOrderItem

---

visitPatternComprehension()

visitPatternComprehension(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:191

Parameters

Parameter	Type
node	PatternComprehension

Returns

string

Implementation of

CypherVisitor.visitPatternComprehension

---

visitPatternElChain()

visitPatternElChain(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:150

Parameters

Parameter	Type
node	PatternElChain

Returns

string

Implementation of

CypherVisitor.visitPatternElChain

---

visitProjectionBody()

visitProjectionBody(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:277

Parameters

Parameter	Type
node	ProjectionBody

Returns

string

Implementation of

CypherVisitor.visitProjectionBody

---

visitPropLookup()

visitPropLookup(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:219

Parameters

Parameter	Type
node	PropLookup

Returns

string

Implementation of

CypherVisitor.visitPropLookup

---

visitQuantifiedExpr()

visitQuantifiedExpr(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:145

Parameters

Parameter	Type
node	QuantifiedExpr

Returns

string

Implementation of

CypherVisitor.visitQuantifiedExpr

---

visitQuery()

visitQuery(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:225

Parameters

Parameter	Type
node	Query

Returns

string

Implementation of

CypherVisitor.visitQuery

---

visitRange()

protected visitRange(range): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:169

Serializes a relationship hop range: a single-element tuple emits just start; a two-element tuple emits start..end with missing bounds left blank (e.g. ..5 or 1..).

Parameters

Parameter	Type
range	[ASTNode, ASTNode] | [ASTNode]

Returns

string

---

visitRelPattern()

visitRelPattern(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:178

Parameters

Parameter	Type
node	RelPattern

Returns

string

Implementation of

CypherVisitor.visitRelPattern

---

visitRemoveClause()

visitRemoveClause(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:263

Parameters

Parameter	Type
node	RemoveClause

Returns

string

Implementation of

CypherVisitor.visitRemoveClause

---

visitRemoveItem()

visitRemoveItem(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:266

Parameters

Parameter	Type
node	RemoveItem

Returns

string

Implementation of

CypherVisitor.visitRemoveItem

---

visitReturnClause()

visitReturnClause(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:294

Parameters

Parameter	Type
node	ReturnClause

Returns

string

Implementation of

CypherVisitor.visitReturnClause

---

visitSchemaPart()

protected visitSchemaPart(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:91

Serializes one segment of a schema path: allAttrs becomes '*', other symbols and numbers use .toString(), and plain strings are backtick-quoted.

Parameters

Parameter	Type
node	string | number | symbol

Returns

string

---

visitSetClause()

visitSetClause(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:253

Parameters

Parameter	Type
node	SetClause

Returns

string

Implementation of

CypherVisitor.visitSetClause

---

visitSetItem()

visitSetItem(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:256

Parameters

Parameter	Type
node	SetItem

Returns

string

Implementation of

CypherVisitor.visitSetItem

---

visitSetOp()

visitSetOp(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:222

Parameters

Parameter	Type
node	SetOp

Returns

string

Implementation of

CypherVisitor.visitSetOp

---

visitStringLiteral()

visitStringLiteral(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:109

Parameters

Parameter	Type
node	ASTStringLiteral

Returns

string

Implementation of

CypherVisitor.visitStringLiteral

---

visitSubscriptExpr()

visitSubscriptExpr(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:216

Parameters

Parameter	Type
node	SubscriptExpr

Returns

string

Implementation of

CypherVisitor.visitSubscriptExpr

---

visitUnwindClause()

visitUnwindClause(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:239

Parameters

Parameter	Type
node	UnwindClause

Returns

string

Implementation of

CypherVisitor.visitUnwindClause

---

visitWithClause()

visitWithClause(node): string

Defined in: lang-cypher/src/visitors/ast-stringifier.ts:290

Parameters

Parameter	Type
node	WithClause

Returns

string

Implementation of

CypherVisitor.visitWithClause