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https://issues.apache.org/jira/browse/FLINK-6281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15984520#comment-15984520
]
ASF GitHub Bot commented on FLINK-6281:
---------------------------------------
Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/3712#discussion_r113412006
--- Diff:
flink-connectors/flink-jdbc/src/main/java/org/apache/flink/api/java/io/jdbc/JDBCTableSink.java
---
@@ -0,0 +1,91 @@
+/*
+ * 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.jdbc;
+
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.common.typeutils.TypeSerializer;
+import org.apache.flink.api.java.typeutils.RowTypeInfo;
+import org.apache.flink.streaming.api.datastream.DataStream;
+import org.apache.flink.streaming.runtime.operators.CheckpointCommitter;
+import org.apache.flink.streaming.runtime.operators.GenericWriteAheadSink;
+import org.apache.flink.table.sinks.StreamTableSink;
+import org.apache.flink.table.sinks.TableSink;
+import org.apache.flink.types.Row;
+
+import java.io.IOException;
+import java.util.UUID;
+
+public class JDBCTableSink extends GenericWriteAheadSink<Row> implements
StreamTableSink<Row> {
+ private final JDBCOutputFormat outputFormat;
+ private final CheckpointCommitter committer;
+ private final String[] fieldNames;
+ private final TypeInformation[] fieldTypes;
+
+ public JDBCTableSink(CheckpointCommitter committer, TypeSerializer<Row>
serializer,
+ JDBCOutputFormat outputFormat, String[]
fieldNames,
+ TypeInformation[] fieldTypes) throws Exception {
+ super(committer, serializer,
UUID.randomUUID().toString().replace("-", "_"));
+ this.outputFormat = outputFormat;
+ this.committer = committer;
+ this.fieldNames = fieldNames;
+ this.fieldTypes = fieldTypes;
+ }
+
+ @Override
+ public void emitDataStream(DataStream<Row> dataStream) {
+ dataStream.transform("JDBC Sink", getOutputType(), this);
+ }
+
+ @Override
+ public TypeInformation<Row> getOutputType() {
+ return new RowTypeInfo(fieldTypes, fieldNames);
+ }
+
+ @Override
+ public String[] getFieldNames() {
+ return fieldNames;
+ }
+
+ @Override
+ public TypeInformation<?>[] getFieldTypes() {
+ return fieldTypes;
+ }
+
+ @Override
+ public TableSink<Row> configure(String[] fieldNames,
TypeInformation<?>[] fieldTypes) {
+ try {
+ return new JDBCTableSink(committer, serializer,
outputFormat, fieldNames, fieldTypes);
+ } catch (Exception e) {
+ LOG.warn("Failed to create a copy of the sink.", e);
+ return null;
+ }
+ }
+
+ @Override
+ protected boolean sendValues(Iterable<Row> value, long timestamp)
throws Exception {
+ for (Row r : value) {
+ try {
+ outputFormat.writeRecord(r);
--- End diff --
This doesn't guarantee in any way that the values are actually being sent;
you need some kind of flushing functionality for this to work properly.
> Create TableSink for JDBC
> -------------------------
>
> Key: FLINK-6281
> URL: https://issues.apache.org/jira/browse/FLINK-6281
> Project: Flink
> Issue Type: Improvement
> Reporter: Haohui Mai
> Assignee: Haohui Mai
>
> It would be nice to integrate the table APIs with the JDBC connectors so that
> the rows in the tables can be directly pushed into JDBC.
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