Github user xuchuanyin commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2328#discussion_r189764133
--- Diff:
integration/spark2/src/main/scala/org/apache/spark/sql/execution/command/stream/CarbonCreateStreamSourceCommand.scala
---
@@ -0,0 +1,50 @@
+/*
+ * 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.stream
+
+import scala.collection.mutable
+
+import org.apache.spark.sql.{Row, SparkSession}
+import org.apache.spark.sql.execution.command.{Field, MetadataCommand,
TableNewProcessor}
+import
org.apache.spark.sql.execution.command.table.CarbonCreateTableCommand
+import org.apache.spark.sql.parser.CarbonSpark2SqlParser
+
+/**
+ * This command is used to create Stream Source, which is implemented as a
Carbon Table
+ */
+case class CarbonCreateStreamSourceCommand(
+ dbName: Option[String],
+ tableName: String,
+ fields: Seq[Field],
+ tblProperties: Map[String, String]
+) extends MetadataCommand {
+ override def processMetadata(sparkSession: SparkSession): Seq[Row] = {
+ val tableModel = new CarbonSpark2SqlParser().prepareTableModel(
+ ifNotExistPresent = false,
+ dbName,
+ tableName,
+ fields,
+ Seq.empty,
+ mutable.Map[String, String](tblProperties.toSeq: _*),
+ None
+ )
+ val tableInfo = TableNewProcessor.apply(tableModel)
--- End diff --
The `Create Stream Source` internally calls `Create Table`. What's the
difference between them? If there is no difference, is `Create Stream Source`
necessary? Can ordinary carbon table can be used as source?
---
