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https://issues.apache.org/jira/browse/SPARK-34204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17270326#comment-17270326
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Nick Hryhoriev commented on SPARK-34204:
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Look like `spark_partition_id` have same issue.
> When use input_file_name() func all column from file appeared in physical
> plan of query, not only projection.
> -------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-34204
> URL: https://issues.apache.org/jira/browse/SPARK-34204
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.7
> Reporter: Nick Hryhoriev
> Priority: Major
>
> input_file_name() function damage applying projection to the physical plan of
> the query.
> if use this function and a new column, column-oriented formats like parquet
> and orc put all columns to Physical plan.
> While without it, only selected columns uploaded.
> In my case, performance influence is x30.
> {code:java}
> import org.apache.spark.sql.SparkSession
> import org.apache.spark.sql.functions._
> object TestSize {
> def main(args: Array[String]): Unit = {
> implicit val spark: SparkSession = SparkSession.builder()
> .master("local")
> .config("spark.sql.shuffle.partitions", "5")
> .getOrCreate()
> import spark.implicits._
> val quey1 = spark.read.parquet(
> "s3a:/part-00040-a19f0d20-eab3-48ef-be5a-602c7f9a8e58.c000.gz.parquet"
> )
> .select($"app_id", $"idfa", input_file_name().as("fileName"))
> .distinct()
> .count()
> val quey2 = spark.read.parquet( "s3a:/part-00040-a19f0d20-eab3-48ef-be5a-
> 602c7f9a8e58.c000.gz.parquet" )
> .select($"app_id", $"idfa", input_file_name().as("fileName"))
> .distinct()
> .count()
> Thread.sleep(10000000000L)
> }
> }
> {code}
> Query 1 has all columns in the physical plan, while query 2 only two.
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