[jira] [Created] (SPARK-27166) Improve `printSchema` to print up to the given level

["Dongjoon Hyun (JIRA)" <ji...@apache.org>]

Dongjoon Hyun created SPARK-27166:
-------------------------------------

             Summary: Improve `printSchema` to print up to the given level
                 Key: SPARK-27166
                 URL: https://issues.apache.org/jira/browse/SPARK-27166
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Dongjoon Hyun


This issue aims to improve `printSchema` to be able to print up to the given level of the schema.
{code:java}
scala> val df = Seq((1,(2,(3,4)))).toDF
df: org.apache.spark.sql.DataFrame = [_1: int, _2: struct<_1: int, _2: struct<_1: int, _2: int>>]

scala> df.printSchema
root
|-- _1: integer (nullable = false)
|-- _2: struct (nullable = true)
| |-- _1: integer (nullable = false)
| |-- _2: struct (nullable = true)
| | |-- _1: integer (nullable = false)
| | |-- _2: integer (nullable = false)

scala> df.printSchema(1)
root
|-- _1: integer (nullable = false)
|-- _2: struct (nullable = true)

scala> df.printSchema(2)
root
|-- _1: integer (nullable = false)
|-- _2: struct (nullable = true)
| |-- _1: integer (nullable = false)
| |-- _2: struct (nullable = true)

scala> df.printSchema(3)
root
|-- _1: integer (nullable = false)
|-- _2: struct (nullable = true)
| |-- _1: integer (nullable = false)
| |-- _2: struct (nullable = true)
| | |-- _1: integer (nullable = false)
| | |-- _2: integer (nullable = false){code}
 



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