Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/12362#discussion_r59621513
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala ---
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution.command
+
+import org.apache.spark.sql.{AnalysisException, Row, SQLContext}
+import org.apache.spark.sql.catalyst.TableIdentifier
+import org.apache.spark.sql.catalyst.catalog.CatalogTable
+
+/**
+ * A command to create a table with the same definition of the given
existing table.
+ *
+ * The syntax of using this command in SQL is:
+ * {{{
+ * CREATE TABLE [IF NOT EXISTS] [db_name.]table_name
+ * LIKE [other_db_name.]existing_table_name
+ * }}}
+ */
+case class CreateTableLike(
+ table: CatalogTable,
+ ifNotExists: Boolean,
+ sourceTable: TableIdentifier) extends RunnableCommand {
+
+ override def run(sqlContext: SQLContext): Seq[Row] = {
+ val catalog = sqlContext.sessionState.catalog
+ if (!catalog.tableExists(sourceTable)) {
+ throw new AnalysisException(
+ s"Cannot create table like on not existing table
${sourceTable.identifier}.")
+ }
+ if (catalog.isTemporaryTable(sourceTable)) {
+ throw new AnalysisException(
+ s"Cannot create table like on a temporary table
${sourceTable.identifier}.")
--- End diff --
I would say: `Operation not allowed: CREATE TABLE ... LIKE temp_table`
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