[SPARK-39706] Set missing column with defaultValue as constant in `ParquetColumnVector`

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: SQL
• Assignee: Yang Jie
• Reporter: Yang Jie
• Created: 07/Jul/22 06:52
• Updated: 12/Jul/22 16:20
• Resolved: 12/Jul/22 16:20

Description

For the missing column with default value of ParquetColumnVector, setting isConstant to true can will prevent the `reset()` method from restoring the internal state of `WritableColumnVector`.

`OrcColumnarBatchReader` has done similar things to missing column.

Issue Links

• links to: [Github] Pull Request #37115 (LuciferYang)