Github user beyond1920 commented on a diff in the pull request:
https://github.com/apache/flink/pull/4681#discussion_r140462814
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/schema/FlinkRelOptTable.scala
---
@@ -0,0 +1,265 @@
+/*
+ * 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.plan.schema
+
+import org.apache.calcite.plan.{RelOptCluster, RelOptSchema, RelOptTable}
+import org.apache.calcite.rel.`type`.RelDataType
+import org.apache.calcite.prepare.CalcitePrepareImpl
+import java.util.{List => JList}
+
+import com.google.common.collect.ImmutableList
+import org.apache.calcite.adapter.enumerable.EnumerableTableScan
+import org.apache.calcite.linq4j.tree.Expression
+import org.apache.calcite.plan.RelOptTable.ToRelContext
+import org.apache.calcite.prepare.Prepare.PreparingTable
+import org.apache.calcite.rel.`type`.{RelDataTypeField, RelDataTypeFactory}
+import org.apache.calcite.rel._
+import org.apache.calcite.rel.logical.LogicalTableScan
+import org.apache.calcite.runtime.Hook
+import org.apache.calcite.schema.{StreamableTable, TranslatableTable}
+import org.apache.calcite.sql.SqlAccessType
+import org.apache.calcite.sql.validate.{SqlModality, SqlMonotonicity}
+import org.apache.calcite.sql2rel.InitializerContext
+import org.apache.calcite.util.ImmutableBitSet
+import org.apache.flink.table.plan.stats.FlinkStatistic
+
+import scala.collection.JavaConverters._
+
+/**
+ * FlinkRelOptTable wraps a FlinkTable
+ *
+ * @param schema the [[RelOptSchema]] this table belongs to
+ * @param rowType the type of rows returned by this table
+ * @param names the identifier for this table. The identifier must be
unique with
+ * respect to the Connection producing this table.
+ * @param table wrapped flink table
+ */
+
+class FlinkRelOptTable protected(
+ schema: RelOptSchema,
+ rowType: RelDataType,
+ names: JList[String],
+ table: FlinkTable[_]) extends PreparingTable {
--- End diff --
done
---
