Package org.elasticsearch.xpack.esql.datasources

Class PartitionFilterHintExtractor

java.lang.Object

org.elasticsearch.xpack.esql.datasources.PartitionFilterHintExtractor

public final class PartitionFilterHintExtractor
extends Object

Walks an unresolved logical plan extracting simple filter predicates from Filter nodes above UnresolvedExternalRelation nodes. These hints are used for partition pruning during glob expansion and split discovery.

Only extracts predicates with an UnresolvedAttribute on one side and a Literal on the other. Supported operators: =, !=, >, >=, <, <=, IN.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	PartitionFilterHintExtractor.Operator
static final record	PartitionFilterHintExtractor.PartitionFilterHint

Method Summary

Modifier and Type	Method	Description
static Map<String,List<PartitionFilterHintExtractor.PartitionFilterHint>>	extract(LogicalPlan unresolvedPlan)

Methods inherited from class java.lang.Object

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

Method Details

extract

public static Map<String,List<PartitionFilterHintExtractor.PartitionFilterHint>> extract(LogicalPlan unresolvedPlan)