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https://issues.apache.org/jira/browse/FLINK-4506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15562187#comment-15562187
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ASF GitHub Bot commented on FLINK-4506:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/2477#discussion_r82594396
--- Diff:
flink-java/src/test/java/org/apache/flink/api/java/io/CsvOutputFormatTest.java
---
@@ -0,0 +1,72 @@
+/*
+ * 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.api.java.io;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.flink.api.common.io.FileOutputFormat;
+import org.apache.flink.api.java.tuple.Tuple3;
+import org.apache.flink.core.fs.FSDataInputStream;
+import org.apache.flink.core.fs.FileSystem;
+import org.apache.flink.core.fs.Path;
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+public class CsvOutputFormatTest {
+
+ private static final Path PATH = new Path("csv_output_test_file.csv");
--- End diff --
Please use `File.createTempFile()` to create a file in the default temp
space.
> CsvOutputFormat defaults allowNullValues to false, even though doc and
> declaration says true
> --------------------------------------------------------------------------------------------
>
> Key: FLINK-4506
> URL: https://issues.apache.org/jira/browse/FLINK-4506
> Project: Flink
> Issue Type: Bug
> Components: Batch Connectors and Input/Output Formats, Documentation
> Reporter: Michael Wong
> Assignee: Kirill Morozov
> Priority: Minor
>
> In the constructor, it has this
> {code}
> this.allowNullValues = false;
> {code}
> But in the setAllowNullValues() method, the doc says the allowNullValues is
> true by default. Also, in the declaration of allowNullValues, the value is
> set to true. It probably makes the most sense to change the constructor.
> {code}
> /**
> * Configures the format to either allow null values (writing an empty
> field),
> * or to throw an exception when encountering a null field.
> * <p>
> * by default, null values are allowed.
> *
> * @param allowNulls Flag to indicate whether the output format should
> accept null values.
> */
> public void setAllowNullValues(boolean allowNulls) {
> this.allowNullValues = allowNulls;
> }
> {code}
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