[ 
https://issues.apache.org/jira/browse/FLINK-4691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15568262#comment-15568262
 ] 

ASF GitHub Bot commented on FLINK-4691:
---------------------------------------

Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2562#discussion_r82964905
  
    --- Diff: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/typeutils/RowIntervalTypeInfo.scala
 ---
    @@ -0,0 +1,108 @@
    +/*
    + * 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.table.typeutils
    +
    +import java.util.Objects
    +
    +import org.apache.flink.api.common.ExecutionConfig
    +import org.apache.flink.api.common.typeinfo.{AtomicType, TypeInformation}
    +import org.apache.flink.api.common.typeutils.base.{LongComparator, 
LongSerializer}
    +import org.apache.flink.api.common.typeutils.{TypeComparator, 
TypeSerializer}
    +import 
org.apache.flink.api.table.typeutils.RowIntervalTypeInfo.instantiateComparator
    +import org.apache.flink.util.Preconditions._
    +
    +/**
    +  * TypeInformation for row intervals.
    +  */
    +@SerialVersionUID(-1306179424364925258L)
    +class RowIntervalTypeInfo[T](
    --- End diff --
    
    I know why we need this class, but IMO it doesn't look like a clean design 
to require a `TypeInformation` for things that will never be serialized or 
compared during execution. Did we consider using Calcite's type system during 
validation?


> Add group-windows for streaming tables        
> ---------------------------------------
>
>                 Key: FLINK-4691
>                 URL: https://issues.apache.org/jira/browse/FLINK-4691
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table API & SQL
>            Reporter: Timo Walther
>            Assignee: Timo Walther
>
> Add Tumble, Slide, Session group-windows for streaming tables as described in 
> [FLIP-11|https://cwiki.apache.org/confluence/display/FLINK/FLIP-11%3A+Table+API+Stream+Aggregations].
>  
> Implementation of group-windows on streaming tables. This includes 
> implementing the API of group-windows, the logical validation for 
> group-windows, and the definition of the “rowtime” and “systemtime” keywords. 
> Group-windows on batch tables won’t be initially supported and will throw an 
> exception.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Reply via email to