dilipbiswal opened a new pull request #28425:
URL: https://github.com/apache/spark/pull/28425
### What changes were proposed in this pull request?
Improve the EXPLAIN FORMATTED output of DSV2 Scan nodes (file based ones).
**Before**
```
== Physical Plan ==
* Project (4)
+- * Filter (3)
+- * ColumnarToRow (2)
+- BatchScan (1)
(1) BatchScan
Output [2]: [value#7, id#8]
Arguments: [value#7, id#8],
ParquetScan(org.apache.spark.sql.test.TestSparkSession@17477bbb,Configuration:
core-default.xml, core-site.xml, mapred-default.xml, mapred-site.xml,
yarn-default.xml, yarn-site.xml, hdfs-default.xml, hdfs-site.xml,
__spark_hadoop_conf__.xml,org.apache.spark.sql.execution.datasources.InMemoryFileIndex@a6c363ce,StructType(StructField(value,IntegerType,true)),StructType(StructField(value,IntegerType,true)),StructType(StructField(id,IntegerType,true)),[Lorg.apache.spark.sql.sources.Filter;@40fee459,org.apache.spark.sql.util.CaseInsensitiveStringMap@feca1ec6,Vector(isnotnull(id#8),
(id#8 > 1)),List(isnotnull(value#7), (value#7 > 2)))
(2) ...
(3) ...
(4) ...
```
**After**
```
== Physical Plan ==
* Project (4)
+- * Filter (3)
+- * ColumnarToRow (2)
+- BatchScan (1)
(1) BatchScan
Output [2]: [value#7, id#8]
DataFilters: [isnotnull(value#7), (value#7 > 2)]
Format: parquet
Location: InMemoryFileIndex[....]
PartitionFilters: [isnotnull(id#8), (id#8 > 1)]
PushedFilers: [IsNotNull(id), IsNotNull(value), GreaterThan(id,1),
GreaterThan(value,2)]
ReadSchema: struct<value:int>
(2) ...
(3) ...
(4) ...
```
### Why are the changes needed?
The old format is not very readable. This improves the readability of the
plan.
### Does this PR introduce any user-facing change?
Yes. the explain output will be different.
### How was this patch tested?
Added a test case in ExplainSuite.
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