| /* |
| * 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.calcite.rex.RexNode |
| import org.apache.calcite.tools.RelBuilder |
| import org.apache.flink.table.api.types.InternalType |
| import org.apache.flink.table.calcite.FlinkTypeFactory |
| import org.apache.flink.table.plan.logical.LogicalExprVisitor |
| import org.apache.flink.table.typeutils.TypeCoercion |
| import org.apache.flink.table.validate._ |
| |
| case class Reinterpret(child: Expression, resultType: InternalType, |
| checkOverflow: Boolean) extends UnaryExpression { |
| |
| override def toString = s"$child.reinterpret($resultType)" |
| |
| override private[flink] def toRexNode(implicit relBuilder: RelBuilder): RexNode = { |
| val typeFactory = relBuilder.getTypeFactory.asInstanceOf[FlinkTypeFactory] |
| |
| val childRexNode = child.toRexNode |
| relBuilder |
| .getRexBuilder |
| .makeReinterpretCast( |
| typeFactory.createTypeFromInternalType(resultType, childRexNode.getType.isNullable), |
| childRexNode, |
| relBuilder.getRexBuilder.makeLiteral(checkOverflow)) |
| } |
| |
| override private[flink] def makeCopy(anyRefs: Array[AnyRef]): this.type = { |
| val child: Expression = anyRefs.head.asInstanceOf[Expression] |
| copy(child, resultType).asInstanceOf[this.type] |
| } |
| |
| override private[flink] def validateInput(): ValidationResult = { |
| if (TypeCoercion.canReinterpret(child.resultType, resultType)) { |
| ValidationSuccess |
| } else { |
| ValidationFailure(s"Unsupported reinterpret from ${child.resultType} to $resultType") |
| } |
| } |
| |
| override def accept[T](logicalExprVisitor: LogicalExprVisitor[T]): T = |
| logicalExprVisitor.visit(this) |
| } |
| |