Github user dongjoon-hyun commented on a diff in the pull request: https://github.com/apache/spark/pull/14114#discussion_r70305351 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/internal/CatalogImpl.scala --- @@ -138,7 +138,7 @@ class CatalogImpl(sparkSession: SparkSession) extends Catalog { */ @throws[AnalysisException]("table does not exist") override def listColumns(tableName: String): Dataset[Column] = { --- End diff -- Thank you again, @hvanhovell 1. Yep. That is the purpose of this PR, to make the contract consistent with other APIs. 2. The existence checking here is redundant because it call other `listColumns`. The callee will check that.
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