flink-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-9964) Add a CSV table format factory
Date Mon, 13 Aug 2018 14:57:02 GMT

    [ https://issues.apache.org/jira/browse/FLINK-9964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16578392#comment-16578392
] 

ASF GitHub Bot commented on FLINK-9964:
---------------------------------------

twalthr commented on a change in pull request #6541: [FLINK-9964] [table] Add a CSV table
format factory
URL: https://github.com/apache/flink/pull/6541#discussion_r209616703
 
 

 ##########
 File path: flink-formats/flink-csv/src/main/java/org/apache/flink/formats/csv/CsvRowSchemaConverter.java
 ##########
 @@ -0,0 +1,104 @@
+/*
+ * 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.formats.csv;
+
+import org.apache.flink.api.common.typeinfo.BasicArrayTypeInfo;
+import org.apache.flink.api.common.typeinfo.PrimitiveArrayTypeInfo;
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.common.typeinfo.Types;
+import org.apache.flink.api.java.typeutils.ObjectArrayTypeInfo;
+import org.apache.flink.api.java.typeutils.RowTypeInfo;
+
+import com.fasterxml.jackson.dataformat.csv.CsvSchema;
+import com.fasterxml.jackson.dataformat.csv.CsvSchema.Builder;
+import com.fasterxml.jackson.dataformat.csv.CsvSchema.Column;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Converting functions that related to {@link CsvSchema}.
+ * In {@link CsvSchema}, there are four types(string,number,boolean
+ * and array), in order to satisfy various flink types, this class
+ * sorts out instances of {@link TypeInformation} and convert them to
+ * one of CsvSchema's types.
 
 Review comment:
   We should also document internals of Jackson. In particular when trimmed (leading/trailing
white space) and the special meaning of literals "null", "true" and "false".

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on 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


> Add a CSV table format factory
> ------------------------------
>
>                 Key: FLINK-9964
>                 URL: https://issues.apache.org/jira/browse/FLINK-9964
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table API &amp; SQL
>            Reporter: Timo Walther
>            Assignee: buptljy
>            Priority: Major
>              Labels: pull-request-available
>
> We should add a RFC 4180 compliant CSV table format factory to read and write data into
Kafka and other connectors. This requires a {{SerializationSchemaFactory}} and {{DeserializationSchemaFactory}}.
How we want to represent all data types and nested types is still up for discussion. For example,
we could flatten and deflatten nested types as it is done [here|http://support.gnip.com/articles/json2csv.html].
We can also have a look how tools such as the Avro to CSV tool perform the conversion.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Mime
View raw message