clintropolis commented on a change in pull request #6902: sql, filters, and virtual columns URL: https://github.com/apache/incubator-druid/pull/6902#discussion_r258678571
########## File path: sql/src/main/java/org/apache/druid/sql/calcite/rel/DruidQuerySignature.java ########## @@ -0,0 +1,167 @@ +/* + * 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.druid.sql.calcite.rel; + +import com.google.common.collect.ImmutableMap; +import org.apache.calcite.sql.type.SqlTypeName; +import org.apache.druid.segment.VirtualColumn; +import org.apache.druid.sql.calcite.expression.DruidExpression; +import org.apache.druid.sql.calcite.planner.Calcites; +import org.apache.druid.sql.calcite.planner.PlannerContext; +import org.apache.druid.sql.calcite.table.RowSignature; + +import javax.annotation.Nullable; +import java.util.HashMap; +import java.util.Map; +import java.util.TreeSet; + +/** + * Wraps a {@link RowSignature} and provides facilities to re-use {@link VirtualColumn} definitions for dimensions, + * filters, and filtered aggregators while constructing a {@link DruidQuery} + */ +public class DruidQuerySignature +{ + private final RowSignature rowSignature; + + private final Map<String, VirtualColumn> virtualColumnsByExpression; + private final Map<String, VirtualColumn> virtualColumnsByName; + private final String virtualColumnPrefix; + private int virtualColumnCounter; + + private final boolean isImmutable; + + public DruidQuerySignature(RowSignature rowSignature) Review comment: Traced through and I think this can never be `null`; I've removed `@Nullable` from the field in `DruidQuery`. ---------------------------------------------------------------- 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 --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
