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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2019/05/06 05:38:31 UTC

[GitHub] [flink] xuefuz commented on a change in pull request #8314: [FLINK-12365][table] Add stats related catalog APIs

xuefuz commented on a change in pull request #8314: [FLINK-12365][table] Add stats related catalog APIs
URL: https://github.com/apache/flink/pull/8314#discussion_r281065464
 
 

 ##########
 File path: flink-table/flink-table-common/src/main/java/org/apache/flink/table/catalog/stats/CatalogColumnStatisticsDataLong.java
 ##########
 @@ -0,0 +1,73 @@
+/*
+ * 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.catalog.stats;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Column statistics value of long type.
+ */
+public class CatalogColumnStatisticsDataLong extends CatalogColumnStatisticsDataBase {
+	/**
+	 * mim value.
+	 */
+	private final long min;
+
+	/**
+	 * max value.
+	 */
+	private final long max;
+
+	/**
+	 * number of distinct values.
+	 */
+	private final long ndv;
 
 Review comment:
   Maybe true, but Hive doesn't give ndv for boolean. I'm pretty much following Hive's stats definition. Let me know if you insist putting ndv for all types.

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