Package org.elasticsearch.xpack.esql.datasources

Class ColumnMapping

java.lang.Object

org.elasticsearch.xpack.esql.datasources.ColumnMapping

All Implemented Interfaces:

Writeable

public final class ColumnMapping
extends Object
implements Writeable

Per-file value describing how this file's blocks become the query's output blocks: for each output column, the source position in the file's natural-order page (or -1 when the file lacks that column), and the cast (if any) the coordinator chose during reconciliation. Built by SchemaReconciliation; consumed by SchemaAdaptingIterator (page mapping) and AsyncExternalSourceOperatorFactory (pushed-filter mapping).

For the four-schema model (File / Unified / Query / Per-file query) this bridges, see the class Javadoc on SchemaReconciliation.

Nested Class Summary

Nested classes/interfaces inherited from interface org.elasticsearch.common.io.stream.Writeable

Writeable.Reader<V>, Writeable.Writer<V>

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
int	hashCode()
void	writeTo(StreamOutput out)

Methods inherited from class java.lang.Object

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

Method Details

writeTo

public void writeTo(StreamOutput out)
             throws IOException

Specified by:

writeTo in interface Writeable

Throws:

IOException

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object