IndexJoinOptimizer.IndexKeyTracer (trino-main 366 API)

java.lang.Object
- io.trino.sql.planner.optimizations.IndexJoinOptimizer.IndexKeyTracer

Enclosing class:

IndexJoinOptimizer
```
public static final class IndexJoinOptimizer.IndexKeyTracer
extends Object
```
Identify the mapping from the lookup symbols used at the top of the index plan to the actual symbols produced by the IndexSource. Note that multiple top-level lookup symbols may share the same underlying IndexSource symbol. Also note that lookup symbols that do not correspond to underlying index source symbols will be omitted from the returned Map.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  IndexKeyTracer()
- Method Summary
  
  All Methods Static Methods Concrete Methods
  Modifier and Type Method Description
  
  static Map<Symbol,Symbol> trace(PlanNode node, Set<Symbol> lookupSymbols)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- IndexKeyTracer
```
public IndexKeyTracer()
```

Method Detail

trace

public static Map<Symbol,Symbol> trace(PlanNode node,
                                             Set<Symbol> lookupSymbols)