Package org.apache.calcite.rel

Class RelCommonExpressionBasicSuggester

java.lang.Object

org.apache.calcite.rel.RelCommonExpressionBasicSuggester

All Implemented Interfaces:

RelCommonExpressionSuggester

@API(since="1.41.0",
     status=EXPERIMENTAL)
public class RelCommonExpressionBasicSuggester
extends Object
implements RelCommonExpressionSuggester

Suggester for common relational expressions that appear as is (identical trees) more than once in the query plan.

Constructor Summary

Constructors

Constructor	Description
RelCommonExpressionBasicSuggester()

Method Summary

Modifier and Type	Method	Description
Collection<RelNode>	suggest(RelNode input, @Nullable Context context)	Suggests interesting expressions for the specified input expression and context.

Methods inherited from class java.lang.Object

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

Constructor Details

RelCommonExpressionBasicSuggester

public RelCommonExpressionBasicSuggester()

Method Details

suggest

public Collection<RelNode> suggest(RelNode input,
 @Nullable Context context)

Description copied from interface: RelCommonExpressionSuggester

Suggests interesting expressions for the specified input expression and context.

Specified by:

suggest in interface RelCommonExpressionSuggester

Parameters:

input - a relational expression representing the query under compilation.

context - a context for tuning aspects of the suggestion process.

Returns:

a collection with interesting expressions for the specified relational expression