Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/5240#discussion_r163865339
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/descriptors/TableSourceDescriptor.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.flink.table.descriptors
+
+import org.apache.flink.table.descriptors.DescriptorUtils.statistics
+import org.apache.flink.table.plan.stats.TableStats
+
+import scala.collection.JavaConverters._
+
+/**
+ * Common class for all descriptors describing a table source.
+ */
+abstract class TableSourceDescriptor extends Descriptor {
+
+ protected var schemaDescriptor: Option[Schema] = None
+ protected var connectorDescriptor: Option[ConnectorDescriptor] = None
+ protected var encodingDescriptor: Option[EncodingDescriptor] = None
+ protected var proctimeDescriptor: Option[Proctime] = None
+ protected var rowtimeDescriptor: Option[Rowtime] = None
+ protected var statisticsDescriptor: Option[Statistics] = None
+ protected var metaDescriptor: Option[Metadata] = None
+
--- End diff --
I added this functionality to the `Schema` descriptor.
---
