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

Class ApplyPreferredTableWriterPartitioning

java.lang.Object

io.trino.sql.planner.iterative.rule.ApplyPreferredTableWriterPartitioning

All Implemented Interfaces:

Rule<TableWriterNode>

public class ApplyPreferredTableWriterPartitioning
extends Object
implements Rule<TableWriterNode>

Rule verifies if preconditions for using preferred write partitioning are met: - expected number of partitions to be written (based on table stat) is greater than or equal to preferred_write_partitioning_min_number_of_partitions session property, - use_preferred_write_partitioning is set to true. If precondition are met the TableWriterNode is modified to mark the intention to use preferred write partitioning: value of TableWriterNode.getPreferredPartitioningScheme() is set as result of TableWriterNode.getPartitioningScheme().

Nested Class Summary

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

Rule.Context, Rule.Result

Field Summary

Fields

Modifier and Type	Field	Description
static final Pattern<TableWriterNode>	WRITER_NODE_WITH_PREFERRED_PARTITIONING

Constructor Summary

Constructors

Constructor	Description
ApplyPreferredTableWriterPartitioning()

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Details

WRITER_NODE_WITH_PREFERRED_PARTITIONING

public static final Pattern<TableWriterNode> WRITER_NODE_WITH_PREFERRED_PARTITIONING

Constructor Details

ApplyPreferredTableWriterPartitioning

public ApplyPreferredTableWriterPartitioning()

Method Details

getPattern

public Pattern<TableWriterNode> getPattern()

Description copied from interface: Rule

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<TableWriterNode>

isEnabled

public boolean isEnabled(Session session)

Specified by:

isEnabled in interface Rule<TableWriterNode>

apply

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

Specified by:

apply in interface Rule<TableWriterNode>