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https://issues.apache.org/jira/browse/FLINK-3547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208704#comment-15208704
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ASF GitHub Bot commented on FLINK-3547:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1820#discussion_r57190736
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/plan/nodes/datastream/DataStreamUnion.scala
---
@@ -0,0 +1,68 @@
+/*
+ * 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.nodes.datastream
+
+import org.apache.calcite.plan.{RelOptCluster, RelTraitSet}
+import org.apache.calcite.rel.`type`.RelDataType
+import org.apache.calcite.rel.{RelNode, RelWriter, BiRel}
+import org.apache.flink.api.common.typeinfo.TypeInformation
+import org.apache.flink.api.table.TableConfig
+import org.apache.flink.streaming.api.datastream.DataStream
+
+/**
+ * Flink RelNode which matches along with Union.
+ *
+ */
+class DataStreamUnion(
+ cluster: RelOptCluster,
+ traitSet: RelTraitSet,
+ left: RelNode,
+ right: RelNode,
+ rowType: RelDataType,
+ opName: String)
--- End diff --
`DataSetUnion` was updated to not use the `opName` anymore. Would be good
to reflect these changes also in `DataStreamUnion`.
> Add support for streaming projection, selection, and union
> ----------------------------------------------------------
>
> Key: FLINK-3547
> URL: https://issues.apache.org/jira/browse/FLINK-3547
> Project: Flink
> Issue Type: Sub-task
> Components: Table API
> Reporter: Vasia Kalavri
> Assignee: Vasia Kalavri
>
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