[
https://issues.apache.org/jira/browse/FLINK-9852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16546312#comment-16546312
]
ASF GitHub Bot commented on FLINK-9852:
---------------------------------------
Github user pnowojski commented on a diff in the pull request:
https://github.com/apache/flink/pull/6343#discussion_r202965060
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/descriptors/BatchTableDescriptor.scala
---
@@ -0,0 +1,126 @@
+/*
+ * 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.descriptors
+
+import org.apache.flink.table.api.{BatchTableEnvironment,
ValidationException}
+import org.apache.flink.table.factories.{BatchTableSinkFactory,
BatchTableSourceFactory, TableFactoryService}
+
+/**
+ * Descriptor for specifying a table source and/or sink in a batch
environment.
+ */
+class BatchTableDescriptor(
+ private val tableEnv: BatchTableEnvironment,
+ private val connectorDescriptor: ConnectorDescriptor)
+ extends TableDescriptor
+ with SchematicDescriptor
+ with RegistrableDescriptor {
+
+ private var formatDescriptor: Option[FormatDescriptor] = None
+ private var schemaDescriptor: Option[Schema] = None
+
+ /**
+ * Internal method for properties conversion.
+ */
+ override private[flink] def addProperties(properties:
DescriptorProperties): Unit = {
+ connectorDescriptor.addProperties(properties)
+ formatDescriptor.foreach(_.addProperties(properties))
+ schemaDescriptor.foreach(_.addProperties(properties))
+ }
+
+ /**
+ * Searches for the specified table source, configures it accordingly,
and registers it as
+ * a table under the given name.
+ *
+ * @param name table name to be registered in the table environment
+ */
+ override def registerTableSource(name: String): Unit = {
+ val javaMap = getValidProperties.asMap
+ val tableSource = TableFactoryService
+ .find(classOf[BatchTableSourceFactory[_]], javaMap)
+ .createBatchTableSource(javaMap)
+ tableEnv.registerTableSource(name, tableSource)
+ }
+
+ /**
+ * Searches for the specified table sink, configures it accordingly,
and registers it as
+ * a table under the given name.
+ *
+ * @param name table name to be registered in the table environment
+ */
+ override def registerTableSink(name: String): Unit = {
+ val javaMap = getValidProperties.asMap
+ val tableSink = TableFactoryService
+ .find(classOf[BatchTableSinkFactory[_]], javaMap)
+ .createBatchTableSink(javaMap)
+ tableEnv.registerTableSink(name, tableSink)
+ }
+
+ /**
+ * Searches for the specified table source and sink, configures them
accordingly, and registers
+ * them as a table under the given name.
+ *
+ * @param name table name to be registered in the table environment
+ */
+ override def registerTableSourceAndSink(name: String): Unit = {
+ registerTableSource(name)
+ registerTableSink(name)
+ }
+
+ /**
+ * Specifies the format that defines how to read data from a connector.
+ */
+ override def withFormat(format: FormatDescriptor): BatchTableDescriptor
= {
+ formatDescriptor = Some(format)
+ this
+ }
+
+ /**
+ * Specifies the resulting table schema.
+ */
+ override def withSchema(schema: Schema): BatchTableDescriptor = {
+ schemaDescriptor = Some(schema)
+ this
+ }
+
+ override def toString: String = {
+ getValidProperties.toString
+ }
+
+ //
----------------------------------------------------------------------------------------------
+
+ private def getValidProperties: DescriptorProperties = {
--- End diff --
duplicated code with `StreamTableDescriptor. getValidProperties`
> Expose descriptor-based sink creation in table environments
> -----------------------------------------------------------
>
> Key: FLINK-9852
> URL: https://issues.apache.org/jira/browse/FLINK-9852
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Major
> Labels: pull-request-available
>
> Currently, only a table source can be created using the unified table
> descriptors with {{tableEnv.from(...)}}. A similar approach should be
> supported for defining sinks or even both types at the same time.
> I suggest the following syntax:
> {code}
> tableEnv.connect(Kafka(...)).registerSource("name")
> tableEnv.connect(Kafka(...)).registerSink("name")
> tableEnv.connect(Kafka(...)).registerSourceAndSink("name")
> {code}
> A table could then access the registered source/sink.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
