vdiravka commented on a change in pull request #1466: DRILL-6381: Add support for index based planning and execution URL: https://github.com/apache/drill/pull/1466#discussion_r223377345
########## File path: contrib/format-maprdb/src/main/java/org/apache/drill/exec/store/mapr/db/MapRDBPushLimitIntoScan.java ########## @@ -0,0 +1,203 @@ +/* + * 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.drill.exec.store.mapr.db; + +import org.apache.calcite.plan.RelOptRuleCall; +import org.apache.calcite.plan.RelOptRuleOperand; +import org.apache.calcite.rel.RelNode; +import org.apache.calcite.rex.RexLiteral; +import org.apache.drill.exec.physical.base.GroupScan; +import org.apache.drill.exec.planner.common.DrillRelOptUtil; +import org.apache.drill.exec.planner.logical.RelOptHelper; +import org.apache.drill.exec.planner.physical.LimitPrel; +import org.apache.drill.exec.planner.physical.ProjectPrel; +import org.apache.drill.exec.planner.physical.RowKeyJoinPrel; +import org.apache.drill.exec.planner.physical.ScanPrel; +import org.apache.drill.exec.store.StoragePluginOptimizerRule; +import org.apache.drill.exec.store.hbase.HBaseScanSpec; +import org.apache.drill.exec.store.mapr.db.binary.BinaryTableGroupScan; +import org.apache.drill.exec.store.mapr.db.json.JsonTableGroupScan; +import org.apache.drill.exec.store.mapr.db.json.RestrictedJsonTableGroupScan; + +public abstract class MapRDBPushLimitIntoScan extends StoragePluginOptimizerRule { + static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(MapRDBPushLimitIntoScan.class); + + private MapRDBPushLimitIntoScan(RelOptRuleOperand operand, String description) { + super(operand, description); + } + + public static final StoragePluginOptimizerRule LIMIT_ON_SCAN = + new MapRDBPushLimitIntoScan(RelOptHelper.some(LimitPrel.class, RelOptHelper.any(ScanPrel.class)), + "MapRDBPushLimitIntoScan:Limit_On_Scan") { + + @Override + public void onMatch(RelOptRuleCall call) { + final ScanPrel scan = call.rel(1); Review comment: Could you please change 50 and 51 number strings? It is more clear to use `relNodes` from `call` in order. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services
