Github user janewangfb commented on a diff in the pull request:
https://github.com/apache/spark/pull/18975#discussion_r137607749
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/InsertIntoDataSourceDirCommand.scala
---
@@ -0,0 +1,81 @@
+/*
+ * 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.SparkException
+import org.apache.spark.sql._
+import org.apache.spark.sql.catalyst.catalog._
+import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
+import org.apache.spark.sql.execution.datasources._
+
+/**
+ * A command used to write the result of a query to a directory.
+ *
+ * The syntax of using this command in SQL is:
+ * {{{
+ * INSERT OVERWRITE DIRECTORY (path=STRING)?
+ * USING format OPTIONS ([option1_name "option1_value", option2_name
"option2_value", ...])
+ * SELECT ...
+ * }}}
+ *
+ * @param storage storage format used to describe how the query result is
stored.
+ * @param provider the data source type to be used
+ * @param query the logical plan representing data to write to
+ * @param overwrite whthere overwrites existing directory
+ */
+case class InsertIntoDataSourceDirCommand(
+ storage: CatalogStorageFormat,
+ provider: String,
+ query: LogicalPlan,
+ overwrite: Boolean) extends RunnableCommand {
+
+ override def innerChildren: Seq[LogicalPlan] = Seq(query)
--- End diff --
updated.
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