io.prestosql.sql.planner.iterative.rule

Class RewriteSpatialPartitioningAggregation

java.lang.Object

io.prestosql.sql.planner.iterative.rule.RewriteSpatialPartitioningAggregation

All Implemented Interfaces:

Rule<AggregationNode>

public class RewriteSpatialPartitioningAggregation
extends Object
implements Rule<AggregationNode>

Re-writes spatial_partitioning(geometry) aggregations into spatial_partitioning(envelope, partition_count) on top of ST_Envelope(geometry) projection, e.g.

 - Aggregation: spatial_partitioning(geometry)
    - source
 

becomes

 - Aggregation: spatial_partitioning(envelope, partition_count)
    - Project: envelope := ST_Envelope(geometry)
        - source
 

, where partition_count is the value of session property hash_partition_count

Nested Class Summary

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

Rule.Context, Rule.Result

Constructor Summary

Constructors

Constructor and Description
RewriteSpatialPartitioningAggregation(Metadata metadata)

Method Summary

Modifier and Type	Method and Description
Rule.Result	apply(AggregationNode node, Captures captures, Rule.Context context)
Pattern<AggregationNode>	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.prestosql.sql.planner.iterative.Rule

isEnabled

Constructor Detail

RewriteSpatialPartitioningAggregation

public RewriteSpatialPartitioningAggregation(Metadata metadata)

Method Detail

getPattern

public Pattern<AggregationNode> getPattern()

Description copied from interface: Rule

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<AggregationNode>

apply

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

Specified by:

apply in interface Rule<AggregationNode>