[SPARK-45649] Unify the prepare framework for `OffsetWindowFunctionFrame`

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Component/s: SQL
• Labels: pull-request-available
• Assignee: Jiaan Geng
• Reporter: Jiaan Geng
• Created: 24/Oct/23 11:35
• Updated: 11/Dec/23 11:50
• Resolved: 11/Dec/23 11:50

Description

Currently, the implementation the `prepare` of all the `OffsetWindowFunctionFrame` have the same code logic show below.
```
override def prepare(rows: ExternalAppendOnlyUnsafeRowArray): Unit = {
if (offset > rows.length)

{ fillDefaultValue(EmptyRow) }

else {
resetStates(rows)
if (ignoreNulls)

{ ... } else { ... }

}
}
```

Issue Links

• links to: GitHub Pull Request #43507
• links to: GitHub Pull Request #43958