dongjoon-hyun commented on a change in pull request #28425:
URL: https://github.com/apache/spark/pull/28425#discussion_r453202963



##########
File path: 
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/FileScan.scala
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@@ -94,22 +96,27 @@ trait FileScan extends Scan with Batch with 
SupportsReportStatistics with Loggin
   override def hashCode(): Int = getClass.hashCode()
 
   override def description(): String = {
+    val maxMetadataValueLength = 100

Review comment:
       Shall we move this out of functions (`description`/`getMetaData`) 
because this is used already in two places and is assumed that to be the same 
value, `100`?




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