WindowFunction -- Window Function Expressions With WindowFrame¶
WindowFunction
is the <
[[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
| <
| <
=== [[frame]] Defining WindowFrame for Execution -- frame
Method
[source, scala]¶
frame: WindowFrame¶
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