| /* |
| * 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.calcite.adapter.cassandra; |
| |
| import com.datastax.oss.driver.api.core.CqlSession; |
| import org.apache.calcite.plan.RelOptCluster; |
| import org.apache.calcite.plan.RelOptRule; |
| import org.apache.calcite.plan.RelOptTable; |
| import org.apache.calcite.plan.RelTraitSet; |
| import org.apache.calcite.rel.type.RelDataType; |
| import org.apache.calcite.schema.SchemaPlus; |
| import org.apache.drill.exec.store.cassandra.CassandraStorageConfig; |
| import org.apache.drill.exec.store.cassandra.plan.CassandraEnumerablePrelContext; |
| import org.apache.drill.exec.store.cassandra.plan.DrillCassandraLimitRule; |
| import org.apache.drill.exec.store.cassandra.schema.CassandraDrillSchema; |
| import org.apache.drill.exec.store.enumerable.plan.EnumerableIntermediatePrelConverterRule; |
| import org.apache.drill.exec.store.enumerable.plan.VertexDrelConverterRule; |
| |
| import java.util.Arrays; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| public class CalciteUtils { |
| private static final RelOptRule VERTEX_DREL_CONVERTER_RULE = |
| VertexDrelConverterRule.create(CassandraRel.CONVENTION); |
| |
| private static final RelOptRule ENUMERABLE_INTERMEDIATE_PREL_CONVERTER_RULE = |
| new EnumerableIntermediatePrelConverterRule( |
| new CassandraEnumerablePrelContext(CassandraStorageConfig.NAME), CassandraRel.CONVENTION); |
| |
| public static CassandraTableScan tableScanCreator(RelOptCluster cluster, RelTraitSet traitSet, |
| RelOptTable table, CassandraTable cassandraTable, |
| RelDataType projectRowType) { |
| return new CassandraTableScan(cluster, traitSet, table, cassandraTable, projectRowType); |
| } |
| |
| public static Set<RelOptRule> cassandraRules() { |
| Set<RelOptRule> rules = Arrays.stream(CassandraRules.RULES) |
| .collect(Collectors.toSet()); |
| rules.add(DrillCassandraLimitRule.INSTANCE); |
| rules.add(ENUMERABLE_INTERMEDIATE_PREL_CONVERTER_RULE); |
| rules.add(VERTEX_DREL_CONVERTER_RULE); |
| return rules; |
| } |
| |
| public static CqlSession getSession(SchemaPlus schema) { |
| return schema.unwrap(CassandraDrillSchema.class).getDelegatingSchema().session; |
| } |
| } |