brkyvz commented on a change in pull request #26957: [SPARK-30314] Add 
identifier and catalog information to DataSourceV2Relation
URL: https://github.com/apache/spark/pull/26957#discussion_r366592152
 
 

 ##########
 File path: sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
 ##########
 @@ -554,12 +556,14 @@ final class DataFrameWriter[T] private[sql](ds: 
Dataset[T]) {
     }
 
     val command = (mode, tableOpt) match {
-      case (_, Some(table: V1Table)) =>
+      case (_, Some(_: V1Table)) =>
         return saveAsTable(TableIdentifier(ident.name(), 
ident.namespace().headOption))
 
       case (SaveMode.Append, Some(table)) =>
         checkPartitioningMatchesV2Table(table)
-        AppendData.byName(DataSourceV2Relation.create(table), df.logicalPlan, 
extraOptions.toMap)
+        val v2Relation =
+          DataSourceV2Relation.create(table, 
catalogManager.catalogIdentifier(catalog), Seq(ident))
+        AppendData.byName(v2Relation, df.logicalPlan, extraOptions.toMap)
 
       case (SaveMode.Overwrite, _) =>
 
 Review comment:
   It drops and recreates a table. It's a DDL operation instead of DML

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