Package io.trino.sql.planner.iterative.rule

Class MergeUnion

java.lang.Object

io.trino.sql.planner.iterative.rule.MergeUnion

All Implemented Interfaces:

Rule<UnionNode>

public class MergeUnion
extends Object
implements Rule<UnionNode>

Transforms:

 - Union
   - Union
     - Relation1
     - Relation2
   - Union
     - Relation3
     - Relation4
 

Into

 - Union
   - Relation1
   - Relation2
   - Relation3
   - Relation4
 

Nested Class Summary

Nested classes/interfaces inherited from interface io.trino.sql.planner.iterative.Rule

Rule.Context, Rule.Result

Constructor Summary

Constructors

Constructor	Description
MergeUnion()

Method Summary

Modifier and Type	Method	Description
Rule.Result	apply(UnionNode node, Captures captures, Rule.Context context)
Pattern<UnionNode>	getPattern()	Returns a pattern to which plan nodes this rule applies.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.trino.sql.planner.iterative.Rule

isEnabled

Constructor Details

MergeUnion

public MergeUnion()

Method Details

getPattern

public Pattern<UnionNode> getPattern()

Description copied from interface: Rule

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<UnionNode>

apply

public Rule.Result apply(UnionNode node,
 Captures captures,
 Rule.Context context)

Specified by:

apply in interface Rule<UnionNode>