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https://issues.apache.org/jira/browse/FLINK-6232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16085366#comment-16085366
]
ASF GitHub Bot commented on FLINK-6232:
---------------------------------------
Github user wuchong commented on a diff in the pull request:
https://github.com/apache/flink/pull/4266#discussion_r126683783
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/api/scala/stream/sql/JoinITCase.scala
---
@@ -0,0 +1,117 @@
+/*
+ * 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.api.scala.stream.sql
+
+import org.apache.flink.api.scala._
+import org.apache.flink.streaming.api.scala.StreamExecutionEnvironment
+import org.apache.flink.table.api.TableEnvironment
+import org.apache.flink.table.api.scala._
+import org.apache.flink.table.api.scala.stream.utils.{StreamITCase,
StreamingWithStateTestBase}
+import org.apache.flink.types.Row
+import org.junit._
+
+import scala.collection.mutable
+
+class JoinITCase extends StreamingWithStateTestBase {
+
+ val data = List(
+ (1L, 1, "Hello"),
+ (2L, 2, "Hello"),
+ (3L, 3, "Hello"),
+ (4L, 4, "Hello"),
+ (5L, 5, "Hello"),
+ (6L, 6, "Hello"),
+ (7L, 7, "Hello World"),
+ (8L, 8, "Hello World"),
+ (20L, 20, "Hello World"))
+
+ /** test process time inner join **/
+ @Test
+ def testProcessTimeInnerJoin(): Unit = {
+ val env = StreamExecutionEnvironment.getExecutionEnvironment
+ val tEnv = TableEnvironment.getTableEnvironment(env)
+ env.setStateBackend(getStateBackend)
+ StreamITCase.testResults = mutable.MutableList()
+ env.setParallelism(1)
+
+ val sqlQuery = "SELECT t2.a, t2.c, t1.c from T1 as t1 join T2 as t2 on
t1.a = t2.a and " +
+ "t1.proctime between t2.proctime - interval '5' second and
t2.proctime + interval '5' second"
+
+ val data1 = new mutable.MutableList[(Int, Long, String)]
+ data1.+=((1, 1L, "Hi1"))
+ data1.+=((1, 2L, "Hi2"))
+ data1.+=((1, 5L, "Hi3"))
+ data1.+=((2, 7L, "Hi5"))
+ data1.+=((1, 9L, "Hi6"))
+ data1.+=((1, 8L, "Hi8"))
+
+ val data2 = new mutable.MutableList[(Int, Long, String)]
+ data2.+=((1, 1L, "HiHi"))
+ data2.+=((2, 2L, "HeHe"))
+
+ val t1 = env.fromCollection(data1).toTable(tEnv, 'a, 'b, 'c,
'proctime.proctime)
+ val t2 = env.fromCollection(data2).toTable(tEnv, 'a, 'b, 'c,
'proctime.proctime)
+
+ tEnv.registerTable("T1", t1)
+ tEnv.registerTable("T2", t2)
+
+ val result = tEnv.sql(sqlQuery).toAppendStream[Row]
+ result.addSink(new StreamITCase.StringSink[Row])
+ env.execute()
+ }
+
+ /** test process time inner join with other condition **/
+ @Test
+ def testProcessTimeInnerJoinWithOtherCondition(): Unit = {
+ val env = StreamExecutionEnvironment.getExecutionEnvironment
+ val tEnv = TableEnvironment.getTableEnvironment(env)
+ env.setStateBackend(getStateBackend)
+ StreamITCase.testResults = mutable.MutableList()
--- End diff --
You can simply do `StreamITCase.clear` instead of this.
> Support proctime inner equi-join between two streams in the SQL API
> -------------------------------------------------------------------
>
> Key: FLINK-6232
> URL: https://issues.apache.org/jira/browse/FLINK-6232
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: hongyuhong
> Assignee: hongyuhong
>
> The goal of this issue is to add support for inner equi-join on proc time
> streams to the SQL interface.
> Queries similar to the following should be supported:
> {code}
> SELECT o.proctime, o.productId, o.orderId, s.proctime AS shipTime
> FROM Orders AS o
> JOIN Shipments AS s
> ON o.orderId = s.orderId
> AND o.proctime BETWEEN s.proctime AND s.proctime + INTERVAL '1' HOUR;
> {code}
> The following restrictions should initially apply:
> * The join hint only support inner join
> * The ON clause should include equi-join condition
> * The time-condition {{o.proctime BETWEEN s.proctime AND s.proctime +
> INTERVAL '1' HOUR}} only can use proctime that is a system attribute, the
> time condition only support bounded time range like {{o.proctime BETWEEN
> s.proctime - INTERVAL '1' HOUR AND s.proctime + INTERVAL '1' HOUR}}, not
> support unbounded like {{o.proctime > s.protime}}, and should include both
> two stream's proctime attribute, {{o.proctime between proctime() and
> proctime() + 1}} should also not be supported.
> This issue includes:
> * Design of the DataStream operator to deal with stream join
> * Translation from Calcite's RelNode representation (LogicalJoin).
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