| /* |
| * 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.calcite |
| |
| import org.apache.flink.table.plan.metadata.FlinkDefaultRelMetadataProvider |
| |
| import org.apache.calcite.plan.{RelOptCluster, RelOptPlanner} |
| import org.apache.calcite.rel.metadata.{DefaultRelMetadataProvider, JaninoRelMetadataProvider, RelMetadataQuery} |
| import org.apache.calcite.rex.RexBuilder |
| |
| /** |
| * The utility class is to create special [[RelOptCluster]] instance which use |
| * [[FlinkDefaultRelMetadataProvider]] instead of [[DefaultRelMetadataProvider]]. |
| */ |
| object FlinkRelOptClusterFactory { |
| |
| def create(planner: RelOptPlanner, rexBuilder: RexBuilder): RelOptCluster = { |
| val cluster = FlinkRelOptCluster.create(planner, rexBuilder) |
| cluster.setMetadataProvider(FlinkDefaultRelMetadataProvider.INSTANCE) |
| // just set metadataProvider is not enough, see |
| // https://www.mail-archive.com/dev@calcite.apache.org/msg00930.html |
| RelMetadataQuery.THREAD_PROVIDERS.set( |
| JaninoRelMetadataProvider.of(cluster.getMetadataProvider)) |
| cluster |
| } |
| |
| } |
