Add test for non-existent table.

Author: mccheah

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala

@@ -981,7 +981,6 @@ class Analyzer(
    * the table identifier does not include a catalog.
    */
   object ResolveDescribeTable extends Rule[LogicalPlan] {
-    import org.apache.spark.sql.catalog.v2.CatalogV2Implicits._
     override def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
       case describe @ DescribeTableStatement(
           CatalogObjectIdentifier(Some(v2Catalog), ident), _, isExtended) =>

sql/core/src/test/scala/org/apache/spark/sql/sources/v2/DataSourceV2SQLSuite.scala

@@ -87,6 +87,12 @@ class DataSourceV2SQLSuite extends QueryTest with SharedSQLContext with BeforeAn
       Row("data", "string", "")))
   }
 
+  test("DescribeTable with v2 catalog when table does not exist.") {
+    intercept[AnalysisException] {
+      spark.sql("DESCRIBE TABLE testcat.table_name")
+    }
+  }
+
   test("DescribeTable extended using v2 catalog") {
     spark.sql("CREATE TABLE testcat.table_name (id bigint, data string)" +
       " USING foo" +