[GitHub] [flink] JingsongLi commented on a change in pull request #10306: [FLINK-13943][table-api] Provide utility method to convert Flink table to Java List

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JingsongLi commented on a change in pull request #10306: [FLINK-13943][table-api] Provide utility method to convert Flink table to Java List
URL: https://github.com/apache/flink/pull/10306#discussion_r354135147
 
 

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 File path: flink-table/flink-table-planner-blink/src/main/java/org/apache/flink/table/util/TableResultUtils.java
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+/*
+ * 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.util;
+
+import org.apache.flink.annotation.Experimental;
+import org.apache.flink.api.common.ExecutionConfig;
+import org.apache.flink.api.common.JobExecutionResult;
+import org.apache.flink.api.common.accumulators.Accumulator;
+import org.apache.flink.api.common.accumulators.SerializedListAccumulator;
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.common.typeutils.TypeSerializer;
+import org.apache.flink.api.java.Utils;
+import org.apache.flink.streaming.api.datastream.DataStream;
+import org.apache.flink.streaming.api.datastream.DataStreamSink;
+import org.apache.flink.table.api.DataTypes;
+import org.apache.flink.table.api.Table;
+import org.apache.flink.table.api.TableEnvironment;
+import org.apache.flink.table.api.TableSchema;
+import org.apache.flink.table.api.internal.TableImpl;
+import org.apache.flink.table.runtime.types.LogicalTypeDataTypeConverter;
+import org.apache.flink.table.runtime.types.TypeInfoDataTypeConverter;
+import org.apache.flink.table.sinks.AppendStreamTableSink;
+import org.apache.flink.table.sinks.TableSink;
+import org.apache.flink.table.types.DataType;
+import org.apache.flink.table.types.logical.TimestampKind;
+import org.apache.flink.table.types.logical.TimestampType;
+import org.apache.flink.types.Row;
+import org.apache.flink.util.AbstractID;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A collection of utilities for fetching table results.
+ *
+ * <p>NOTE: Methods in this utility class are experimental and can only be used for demonstration or testing
+ * small table results. Please DO NOT use them in production or on large tables.
+ *
+ * <p>We ought to put this class in the api module, but as converting high precision timestamp data type
+ * to type information is not possible in flink planner, we have to put this class in blink planner.
+ */
+@Experimental
+public class TableResultUtils {
+
+	/**
+	 * Convert Flink table to Java list.
+	 * This method is only applicable for small batch jobs and small finite append only stream jobs.
+	 *
+	 * @param table		Flink table to convert
+	 * @return			Converted Java list
+	 */
+	@SuppressWarnings("unchecked")
+	public static List<Row> tableResultToList(Table table) throws Exception {
 
 Review comment:
   Just `collect`?

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