Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/2562#discussion_r82990268
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/expressions/properties.scala
---
@@ -0,0 +1,57 @@
+/*
+ * 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.expressions
+
+import org.apache.calcite.rex.RexNode
+import org.apache.calcite.tools.RelBuilder
+import org.apache.flink.api.common.typeinfo.SqlTimeTypeInfo
+import org.apache.flink.api.table.FlinkRelBuilder.NamedProperty
+import org.apache.flink.api.table.validate.{ValidationFailure,
ValidationSuccess}
+
+abstract class Property(child: Expression) extends UnaryExpression {
+
+ override def toString = s"Property($child)"
+
+ override private[flink] def toRexNode(implicit relBuilder: RelBuilder):
RexNode =
+ throw new UnsupportedOperationException("Property cannot be
transformed to RexNode.")
+
+ override private[flink] def validateInput() =
+ if (child.isInstanceOf[WindowReference]) {
--- End diff --
I just tried to keep the names short. Because the Scala line lengths are
pretty strict.
Done.
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