Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3712#discussion_r132146531
--- Diff:
flink-connectors/flink-jdbc/src/main/java/org/apache/flink/api/java/io/jdbc/JDBCAppendTableSinkBuilder.java
---
@@ -0,0 +1,97 @@
+/*
+ * 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.util.Preconditions;
+
+import static
org.apache.flink.api.java.io.jdbc.JDBCOutputFormat.DEFAULT_BATCH_INTERVAL;
+
+/**
+ * A builder to configure and build the JDBCAppendTableSink.
+ */
+public class JDBCAppendTableSinkBuilder {
+ private String username;
+ private String password;
+ private String driverName;
+ private String dbURL;
+ private String query;
+ private int batchSize = DEFAULT_BATCH_INTERVAL;
+ private TypeInformation<?>[] fieldTypes;
+
+ public JDBCAppendTableSinkBuilder setUsername(String username) {
+ this.username = username;
+ return this;
+ }
+
+ public JDBCAppendTableSinkBuilder setPassword(String password) {
+ this.password = password;
+ return this;
+ }
+
+ public JDBCAppendTableSinkBuilder setDrivername(String drivername) {
+ this.driverName = drivername;
+ return this;
+ }
+
+ public JDBCAppendTableSinkBuilder setDBUrl(String dbURL) {
+ this.dbURL = dbURL;
+ return this;
+ }
+
+ public JDBCAppendTableSinkBuilder setQuery(String query) {
+ this.query = query;
+ return this;
+ }
+
+ public JDBCAppendTableSinkBuilder setBatchSize(int batchSize) {
+ this.batchSize = batchSize;
+ return this;
+ }
+
+ public JDBCAppendTableSinkBuilder setFieldTypes(TypeInformation<?>...
fieldTypes) {
+ this.fieldTypes = fieldTypes;
+ return this;
+ }
+
+ /**
+ * Finalizes the configuration and checks validity.
+ *
+ * @return Configured JDBCOutputFormat
+ */
+ public JDBCAppendTableSink build() {
+ Preconditions.checkNotNull(fieldTypes, "Row type is
unspecified");
--- End diff --
change error message to `"Types of the query parameters are not specified.
Please specify types using the setFieldTypes() method."` (or
`setParameterTypes()` if we rename the method).`
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