flink-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From GitBox <...@apache.org>
Subject [GitHub] [flink] hequn8128 commented on a change in pull request #8050: [FLINK-11067][table] Convert TableEnvironments to interfaces
Date Mon, 15 Apr 2019 06:46:40 GMT
hequn8128 commented on a change in pull request #8050: [FLINK-11067][table] Convert TableEnvironments
to interfaces
URL: https://github.com/apache/flink/pull/8050#discussion_r275223611
 
 

 ##########
 File path: flink-table/flink-table-common/src/main/java/org/apache/flink/table/descriptors/Rowtime.java
 ##########
 @@ -0,0 +1,145 @@
+/*
+ * 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.annotation.PublicEvolving;
+import org.apache.flink.api.common.typeinfo.Types;
+import org.apache.flink.table.sources.tsextractors.TimestampExtractor;
+import org.apache.flink.table.sources.wmstrategies.WatermarkStrategy;
+import org.apache.flink.table.utils.EncodingUtils;
+
+import java.util.Map;
+
+/**
+ * Rowtime descriptor for describing an event time attribute in the schema.
+ */
+@PublicEvolving
+public class Rowtime implements Descriptor {
+
+	private final DescriptorProperties internalProperties = new DescriptorProperties(true);
+
+	public static final String ROWTIME = "rowtime";
+	public static final String ROWTIME_TIMESTAMPS_TYPE = "rowtime.timestamps.type";
+	public static final String ROWTIME_TIMESTAMPS_TYPE_VALUE_FROM_FIELD = "from-field";
+	public static final String ROWTIME_TIMESTAMPS_TYPE_VALUE_FROM_SOURCE = "from-source";
+	public static final String ROWTIME_TIMESTAMPS_TYPE_VALUE_CUSTOM = "custom";
+	public static final String ROWTIME_TIMESTAMPS_FROM = "rowtime.timestamps.from";
+	public static final String ROWTIME_TIMESTAMPS_CLASS = "rowtime.timestamps.class";
+	public static final String ROWTIME_TIMESTAMPS_SERIALIZED = "rowtime.timestamps.serialized";
+
+	public static final String ROWTIME_WATERMARKS_TYPE = "rowtime.watermarks.type";
+	public static final String ROWTIME_WATERMARKS_TYPE_VALUE_PERIODIC_ASCENDING = "periodic-ascending";
+	public static final String ROWTIME_WATERMARKS_TYPE_VALUE_PERIODIC_BOUNDED = "periodic-bounded";
+	public static final String ROWTIME_WATERMARKS_TYPE_VALUE_FROM_SOURCE = "from-source";
+	public static final String ROWTIME_WATERMARKS_TYPE_VALUE_CUSTOM = "custom";
+	public static final String ROWTIME_WATERMARKS_CLASS = "rowtime.watermarks.class";
+	public static final String ROWTIME_WATERMARKS_SERIALIZED = "rowtime.watermarks.serialized";
+	public static final String ROWTIME_WATERMARKS_DELAY = "rowtime.watermarks.delay";
+
+	/**
+	 * Sets a built-in timestamp extractor that converts an existing {@link Long} or
+	 * {@link Types#SQL_TIMESTAMP} field into the rowtime attribute.
+	 *
+	 * @param fieldName The field to convert into a rowtime attribute.
+	 */
+	public Rowtime timestampsFromField(String fieldName) {
+		internalProperties.putString(ROWTIME_TIMESTAMPS_TYPE, ROWTIME_TIMESTAMPS_TYPE_VALUE_FROM_FIELD);
+		internalProperties.putString(ROWTIME_TIMESTAMPS_FROM, fieldName);
+		return this;
+	}
+
+	/**
+	 * Sets a built-in timestamp extractor that converts the assigned timestamps from
+	 * a DataStream API record into the rowtime attribute and thus preserves the assigned
+	 * timestamps from the source.
+	 *
+	 * <p>Note: This extractor only works in streaming environments.
+	 */
+	public Rowtime timestampsFromSource() {
+		internalProperties.putString(ROWTIME_TIMESTAMPS_TYPE, ROWTIME_TIMESTAMPS_TYPE_VALUE_FROM_SOURCE);
+		return this;
+	}
+
+	/**
+	 * Sets a custom timestamp extractor to be used for the rowtime attribute.
+	 *
+	 * @param extractor The {@link TimestampExtractor} to extract the rowtime attribute
+	 *                  from the physical type.
+	 */
+	public Rowtime timestampsFromExtractor(TimestampExtractor extractor) {
+		internalProperties.putString(ROWTIME_TIMESTAMPS_TYPE, ROWTIME_TIMESTAMPS_TYPE_VALUE_CUSTOM);
 
 Review comment:
   Good idea!

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services

Mime
View raw message