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twalthr pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/flink.git
commit 2893f3f597ea3574636d0376bd7823b547fd2217
Author: JingsongLi <lzljs3620...@aliyun.com>
AuthorDate: Wed Jul 17 20:20:22 2019 +0800
[FLINK-13287][table-planner] Support Reinterpret cast call in blink planner
---
.../expressions/PlannerExpressionConverter.scala | 8 ++++
.../flink/table/expressions/Reinterpret.scala | 45 ++++++++++++++++++++++
2 files changed, 53 insertions(+)
diff --git
a/flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/expressions/PlannerExpressionConverter.scala
b/flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/expressions/PlannerExpressionConverter.scala
index 208cad9..8b5dada 100644
---
a/flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/expressions/PlannerExpressionConverter.scala
+++
b/flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/expressions/PlannerExpressionConverter.scala
@@ -56,6 +56,14 @@ class PlannerExpressionConverter private extends
ApiExpressionVisitor[PlannerExp
fromDataTypeToLegacyInfo(
children(1).asInstanceOf[TypeLiteralExpression].getOutputDataType))
+ case REINTERPRET_CAST =>
+ assert(children.size == 3)
+ Reinterpret(
+ children.head.accept(this),
+ fromDataTypeToLegacyInfo(
+ children(1).asInstanceOf[TypeLiteralExpression].getOutputDataType),
+ getValue[Boolean](children(2).accept(this)))
+
case WINDOW_START =>
assert(children.size == 1)
val windowReference = translateWindowReference(children.head)
diff --git
a/flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/expressions/Reinterpret.scala
b/flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/expressions/Reinterpret.scala
new file mode 100644
index 0000000..530fd3c
--- /dev/null
+++
b/flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/expressions/Reinterpret.scala
@@ -0,0 +1,45 @@
+/*
+ * 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.expressions
+
+import org.apache.flink.api.common.typeinfo.TypeInformation
+import
org.apache.flink.table.types.TypeInfoLogicalTypeConverter.fromTypeInfoToLogicalType
+import org.apache.flink.table.typeutils.TypeCoercion
+import org.apache.flink.table.validate._
+
+case class Reinterpret(child: PlannerExpression, resultType:
TypeInformation[_],
+ checkOverflow: Boolean) extends UnaryExpression {
+
+ override def toString = s"$child.reinterpret($resultType)"
+
+ override private[flink] def makeCopy(anyRefs: Array[AnyRef]): this.type = {
+ val child: PlannerExpression = anyRefs.head.asInstanceOf[PlannerExpression]
+ copy(child, resultType).asInstanceOf[this.type]
+ }
+
+ override private[flink] def validateInput(): ValidationResult = {
+ if (TypeCoercion.canReinterpret(
+ fromTypeInfoToLogicalType(child.resultType),
fromTypeInfoToLogicalType(resultType))) {
+ ValidationSuccess
+ } else {
+ ValidationFailure(s"Unsupported reinterpret from ${child.resultType} to
$resultType")
+ }
+ }
+}
+
