Package io.trino.json

Class CachingResolver

java.lang.Object

io.trino.json.CachingResolver

public class CachingResolver
extends Object

A resolver providing coercions and binary operators used for JSON path evaluation, based on the operation type and the input types.

It is instantiated per-driver, and caches the resolved operators and coercions. Caching is applied to IrArithmeticBinary and IrComparisonPredicate path nodes. Its purpose is to avoid resolving operators and coercions on a per-row basis, assuming that the input types to the JSON path operations repeat across rows.

If an operator or a component coercion cannot be resolved for certain input types, it is cached as RESOLUTION_ERROR. It depends on the caller to handle this condition.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CachingResolver.ResolvedOperatorAndCoercions

Constructor Summary

Constructors

Constructor	Description
CachingResolver(Metadata metadata)

Method Summary

Modifier and Type	Method	Description
CachingResolver.ResolvedOperatorAndCoercions	getOperators(IrPathNode node, OperatorType operatorType, Type leftType, Type rightType)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CachingResolver

public CachingResolver(Metadata metadata)

Method Details

getOperators

public CachingResolver.ResolvedOperatorAndCoercions getOperators(IrPathNode node,
 OperatorType operatorType,
 Type leftType,
 Type rightType)