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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