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https://issues.apache.org/jira/browse/FLINK-6968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16576527#comment-16576527
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ASF GitHub Bot commented on FLINK-6968:
---------------------------------------
xhumanoid commented on a change in pull request #6434: [FLINK-6968] [table] Add
Queryable table sink.
URL: https://github.com/apache/flink/pull/6434#discussion_r209314950
##########
File path:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/runtime/stream/sink/queryable/QueryableTableSinkTest.scala
##########
@@ -0,0 +1,188 @@
+/*
+ * 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.runtime.stream.sink.queryable
+
+import java.time.Duration
+import java.util.concurrent.{ExecutionException, TimeUnit}
+
+import org.apache.flink.api.common.state.ValueStateDescriptor
+import org.apache.flink.api.common.time.{Deadline, Time}
+import org.apache.flink.api.common.typeinfo.{BasicTypeInfo, TypeInformation}
+import org.apache.flink.api.java.typeutils.RowTypeInfo
+import org.apache.flink.api.scala._
+import org.apache.flink.contrib.streaming.state.RocksDBStateBackend
+import org.apache.flink.queryablestate.client.QueryableStateClient
+import
org.apache.flink.queryablestate.exceptions.UnknownKeyOrNamespaceException
+import org.apache.flink.runtime.state.StateBackend
+import org.apache.flink.streaming.api.scala.StreamExecutionEnvironment
+import org.apache.flink.table.api.scala._
+import org.apache.flink.table.api.{StreamQueryConfig, TableEnvironment}
+import
org.apache.flink.table.runtime.harness.HarnessTestBase.TestStreamQueryConfig
+import org.apache.flink.table.sinks.queryable.QueryableTableSink
+import org.apache.flink.types.Row
+import org.hamcrest.core.Is
+import org.junit.Assert._
+import org.junit.rules.{ExpectedException, TemporaryFolder}
+import org.junit.{Rule, Test}
+
+
+class QueryableTableSinkTest extends QueryableSinkTestBase {
+
+ private val queryConfig = new StreamQueryConfig()
+ queryConfig.withIdleStateRetentionTime(Time.hours(1), Time.hours(2))
+
+ val _tempFolder = new TemporaryFolder
+ @Rule
+ def tempFolder: TemporaryFolder = _tempFolder
+
+ val _expectedException = ExpectedException.none()
+ @Rule
+ def expectedException: ExpectedException = _expectedException
+
+ def getStateBackend: StateBackend = {
+ val dbPath = tempFolder.newFolder().getAbsolutePath
+ val checkpointPath = tempFolder.newFolder().toURI.toString
+ val backend = new RocksDBStateBackend(checkpointPath)
+ backend.setDbStoragePath(dbPath)
+ backend
+ }
+
+ @Test
+ def testQueryableSink(): Unit = {
+ val env = StreamExecutionEnvironment.getExecutionEnvironment
+ env.setStateBackend(getStateBackend)
+ val tEnv = TableEnvironment.getTableEnvironment(env)
+
+ //name, money
+ val data = List(("jeff", -1), ("dean", -2), ("jeff", 2), ("dean", 4))
+ val source = new TestKVListSource[String, Int](data)
+
+ // select name, sum(money) as sm from t group by name
+ val t = env.addSource(source).toTable(tEnv, 'name, 'money)
+ .groupBy("name")
+ .select("name, sum(money) as sm")
+
+ val queryableSink = new QueryableTableSink("prefix",
+ new StreamQueryConfig().withIdleStateRetentionTime(Time.minutes(1),
Time.minutes(7)))
+
+ t.writeToSink(queryableSink)
+
+ val clusterClient =
QueryableSinkTestBase.miniClusterResource.getClusterClient
+ val deadline = Deadline.now.plus(Duration.ofSeconds(100))
+
+ val autoCancellableJob = new AutoCancellableJob(deadline, clusterClient,
env.getJavaEnv)
+ val client = new QueryableStateClient("localhost", 9084)
+
Review comment:
Required shutdown client in the end
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> Store streaming, updating tables with unique key in queryable state
> -------------------------------------------------------------------
>
> Key: FLINK-6968
> URL: https://issues.apache.org/jira/browse/FLINK-6968
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Fabian Hueske
> Assignee: Renjie Liu
> Priority: Major
> Labels: pull-request-available
>
> Streaming tables with unique key are continuously updated. For example
> queries with a non-windowed aggregation generate such tables. Commonly, such
> updating tables are emitted via an upsert table sink to an external datastore
> (k-v store, database) to make it accessible to applications.
> This issue is about adding a feature to store and maintain such a table as
> queryable state in Flink. By storing the table in Flnk's queryable state, we
> do not need an external data store to access the results of the query but can
> query the results directly from Flink.
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