WindowFunction -- Window Function Expressions With WindowFrame¶

WindowFunction is the <> of <> that define a <> in which the window operator must be executed.

[[contract]] [source, scala]

package org.apache.spark.sql.catalyst.expressions

trait WindowFunction extends Expression { // No required properties (vals and methods) that have no implementation }

[[implementations]] .WindowFunctions (Direct Implementations) [cols="1,2",options="header",width="100%"] |=== | WindowFunction | Description

| <> | [[AggregateWindowFunction]]

| <> | [[OffsetWindowFunction]] |===

=== [[frame]] Defining WindowFrame for Execution -- frame Method

[source, scala]¶

frame defines the WindowFrame for function execution, i.e. the WindowFrame in which the window operator must be executed.

frame is UnspecifiedFrame by default.

NOTE: frame is used when...FIXME