org.verdictdb.core.querying.AggExecutionNode.java Source code

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Here is the source code for org.verdictdb.core.querying.AggExecutionNode.java

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/*
 *    Copyright 2018 University of Michigan
 *
 *    Licensed 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.verdictdb.core.querying;

import java.util.List;

import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;
import org.verdictdb.connection.DbmsQueryResult;
import org.verdictdb.core.execplan.ExecutionInfoToken;
import org.verdictdb.core.sqlobject.SelectQuery;
import org.verdictdb.core.sqlobject.SqlConvertible;
import org.verdictdb.exception.VerdictDBException;

/**
 * The aliases for aggregate columns are identified and set in 
 * the AsyncQueryExecutionPlan.createUnfoldSelectlistWithBasicAgg().
 *
 */
public class AggExecutionNode extends CreateTableAsSelectNode {

    private static final long serialVersionUID = 6222493718874657695L;

    // List<HyperTableCube> cubes = new ArrayList<>();

    protected AggExecutionNode(IdCreator namer, SelectQuery query) {
        super(namer, query);
        //    // stores the alias names for aggregate columns
        //    List<SelectItem> selectItems = query.getSelectList();
        //    for (SelectItem item : selectItems) {
        //      if (item instanceof AliasedColumn) {
        //        String alias = ((AliasedColumn) item).getAliasName();
        //        UnnamedColumn col = ((AliasedColumn) item).getColumn(); 
        //        if (col instanceof ColumnOp) {
        //          if (((ColumnOp) col).isMinAggregate()) {
        //            aggMeta.addMinAlias(alias);
        //          } else if (((ColumnOp) col).isMaxAggregate()) {
        //            aggMeta.addMaxAlias(alias);
        //          } else if (col.isAggregateColumn()) {
        //            aggMeta.addAggAlias(alias);
        //          }
        //        }
        //      } else {
        //        // this is not expected to happen.
        //      }
        //    }
    }

    public static AggExecutionNode create(IdCreator namer, SelectQuery query) {
        AggExecutionNode node = new AggExecutionNode(namer, null);
        SubqueriesToDependentNodes.convertSubqueriesToDependentNodes(query, node);
        node.setSelectQuery(query);

        return node;
    }

    @Override
    public SqlConvertible createQuery(List<ExecutionInfoToken> tokens) throws VerdictDBException {
        return super.createQuery(tokens);
    }

    @Override
    public ExecutionInfoToken createToken(DbmsQueryResult result) {
        ExecutionInfoToken token = super.createToken(result);
        token.setKeyValue("aggMeta", aggMeta);
        token.setKeyValue("dependentQuery", this.selectQuery);
        return token;
    }

    @Override
    public ExecutableNodeBase deepcopy() {
        AggExecutionNode node = new AggExecutionNode(namer, selectQuery);
        copyFields(this, node);
        selectQuery = selectQuery.selectListDeepCopy();
        return node;
    }

    @Override
    public String toString() {
        return new ToStringBuilder(this, ToStringStyle.DEFAULT_STYLE).appendSuper(super.toString())
                .append("aggmeta", aggMeta).build();
    }
}