Package io.trino.sql.planner.iterative

Interface Lookup

public interface Lookup

Method Summary

Modifier and Type	Method	Description
static Lookup	from(Function<GroupReference,Stream<PlanNode>> resolver)
static Lookup	noLookup()	A Lookup implementation that does not perform lookup.
default PlanNode	resolve(PlanNode node)	Resolves a node by materializing GroupReference nodes representing symbolic references to other nodes.
Stream<PlanNode>	resolveGroup(PlanNode node)	Resolves nodes by materializing GroupReference nodes representing symbolic references to other nodes.

Method Details

resolve

default PlanNode resolve(PlanNode node)

Resolves a node by materializing GroupReference nodes representing symbolic references to other nodes. This method is deprecated since is assumes group contains only one node.

If the node is not a GroupReference, it returns the argument as is.

resolveGroup

Stream<PlanNode> resolveGroup(PlanNode node)

Resolves nodes by materializing GroupReference nodes representing symbolic references to other nodes.

Throws:

IllegalArgumentException - if the node is not a GroupReference

noLookup

static Lookup noLookup()

A Lookup implementation that does not perform lookup. It satisfies contract by rejecting GroupReference-s.

from

static Lookup from(Function<GroupReference,Stream<PlanNode>> resolver)