Github user beyond1920 commented on a diff in the pull request:
https://github.com/apache/flink/pull/3196#discussion_r100951579
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/stats/ColumnStats.scala
---
@@ -0,0 +1,52 @@
+/*
+ * 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.stats
+
+/**
+ * column statistics
+ *
+ * @param ndv number of distinct values
+ * @param nullCount number of nulls
+ * @param avgLen average length of column values
+ * @param maxLen max length of column values
+ * @param max max value of column values
+ * @param min min value of column values
+ */
+case class ColumnStats(
+ ndv: Long,
+ nullCount: Long,
+ avgLen: Long,
--- End diff --
ok
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
