Package io.trino.sql.planner

Class TranslationMap

java.lang.Object

io.trino.sql.planner.TranslationMap

public class TranslationMap
extends Object

Keeps mappings of fields and AST expressions to symbols in the current plan within query boundary.

AST and IR expressions use the same class hierarchy (Expression, but differ in the following ways:

• AST expressions contain Identifiers, while IR expressions contain SymbolReferences
• FunctionCalls in AST expressions are SQL function names. In IR expressions, they contain an encoded name representing a resolved function

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TranslationMap.ParametersRow

Constructor Summary

Constructors

Constructor	Description
TranslationMap(Optional<TranslationMap> outerContext, Scope scope, Analysis analysis, Map<NodeRef<LambdaArgumentDeclaration>,Symbol> lambdaArguments, Symbol[] fieldSymbols, Map<ScopeAware<Expression>,Symbol> astToSymbols, Map<NodeRef<Expression>,Symbol> substitutions, Session session, PlannerContext plannerContext)
TranslationMap(Optional<TranslationMap> outerContext, Scope scope, Analysis analysis, Map<NodeRef<LambdaArgumentDeclaration>,Symbol> lambdaArguments, List<Symbol> fieldSymbols, Session session, PlannerContext plannerContext)
TranslationMap(Optional<TranslationMap> outerContext, Scope scope, Analysis analysis, Map<NodeRef<LambdaArgumentDeclaration>,Symbol> lambdaArguments, List<Symbol> fieldSymbols, Map<ScopeAware<Expression>,Symbol> astToSymbols, Session session, PlannerContext plannerContext)

Method Summary

Modifier and Type	Method	Description
boolean	canTranslate(Expression expression)
Analysis	getAnalysis()
List<Symbol>	getFieldSymbols()
Map<ScopeAware<Expression>,Symbol>	getMappings()
TranslationMap.ParametersRow	getParametersRow(List<JsonPathParameter> pathParameters, List<Expression> rewrittenPathParameters, Type parameterRowType, Constant failOnError)
Scope	getScope()
Expression	rewrite(Expression root)
TranslationMap	withAdditionalIdentityMappings(Map<NodeRef<Expression>,Symbol> mappings)
TranslationMap	withAdditionalMappings(Map<ScopeAware<Expression>,Symbol> mappings)
TranslationMap	withNewMappings(Map<ScopeAware<Expression>,Symbol> mappings, List<Symbol> fields)
TranslationMap	withScope(Scope scope, List<Symbol> fields)

Methods inherited from class java.lang.Object

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

Constructor Details

TranslationMap

public TranslationMap(Optional<TranslationMap> outerContext,
 Scope scope,
 Analysis analysis,
 Map<NodeRef<LambdaArgumentDeclaration>,Symbol> lambdaArguments,
 List<Symbol> fieldSymbols,
 Session session,
 PlannerContext plannerContext)

TranslationMap

public TranslationMap(Optional<TranslationMap> outerContext,
 Scope scope,
 Analysis analysis,
 Map<NodeRef<LambdaArgumentDeclaration>,Symbol> lambdaArguments,
 List<Symbol> fieldSymbols,
 Map<ScopeAware<Expression>,Symbol> astToSymbols,
 Session session,
 PlannerContext plannerContext)

TranslationMap

public TranslationMap(Optional<TranslationMap> outerContext,
 Scope scope,
 Analysis analysis,
 Map<NodeRef<LambdaArgumentDeclaration>,Symbol> lambdaArguments,
 Symbol[] fieldSymbols,
 Map<ScopeAware<Expression>,Symbol> astToSymbols,
 Map<NodeRef<Expression>,Symbol> substitutions,
 Session session,
 PlannerContext plannerContext)

Method Details

withScope

public TranslationMap withScope(Scope scope,
 List<Symbol> fields)

withNewMappings

public TranslationMap withNewMappings(Map<ScopeAware<Expression>,Symbol> mappings,
 List<Symbol> fields)

withAdditionalMappings

public TranslationMap withAdditionalMappings(Map<ScopeAware<Expression>,Symbol> mappings)

withAdditionalIdentityMappings

public TranslationMap withAdditionalIdentityMappings(Map<NodeRef<Expression>,Symbol> mappings)

getFieldSymbols

public List<Symbol> getFieldSymbols()

getMappings

public Map<ScopeAware<Expression>,Symbol> getMappings()

getAnalysis

public Analysis getAnalysis()

canTranslate

public boolean canTranslate(Expression expression)

rewrite

public Expression rewrite(Expression root)

getScope

public Scope getScope()

getParametersRow

public TranslationMap.ParametersRow getParametersRow(List<JsonPathParameter> pathParameters,
 List<Expression> rewrittenPathParameters,
 Type parameterRowType,
 Constant failOnError)