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https://issues.apache.org/jira/browse/FLINK-4691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15551459#comment-15551459
]
ASF GitHub Bot commented on FLINK-4691:
---------------------------------------
Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/2562#discussion_r82149847
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/plan/logical/Resolvable.scala
---
@@ -0,0 +1,26 @@
+/*
+ * 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.plan.logical
+
+import org.apache.flink.api.table.expressions.Expression
+
+trait Resolvable[T <: AnyRef] {
--- End diff --
Done.
> 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.
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