/*
 * 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.shardingsphere.core.rewrite.token.pojo;

import com.google.common.base.Optional;
import lombok.Getter;

/**
 * Aggregation distinct token.
 *
 * @author panjuan
 */
@Getter
public final class AggregationDistinctToken extends SQLToken implements Substitutable {
    
    private String columnName;
    
    private Optional<String> derivedAlias;
    
    private final int stopIndex;
    
    public AggregationDistinctToken(final int startIndex, final int stopIndex, final String columnName, final Optional<String> derivedAlias) {
        super(startIndex);
        this.columnName = columnName;
        this.derivedAlias = derivedAlias;
        this.stopIndex = stopIndex;
    }
}

/*
 * 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.shardingsphere.core.rewrite.token.pojo;

import lombok.Getter;

/**
 * Aggregation distinct token.
 *
 * @author panjuan
 */
@Getter
public final class AggregationDistinctToken extends SQLToken implements Substitutable {
    
    private final String columnName;
    
    private final String derivedAlias;
    
    private final int stopIndex;
    
    public AggregationDistinctToken(final int startIndex, final int stopIndex, final String columnName, final String derivedAlias) {
        super(startIndex);
        this.columnName = columnName;
        this.derivedAlias = derivedAlias;
        this.stopIndex = stopIndex;
    }
    
    @Override
    public String toString() {
        return null != derivedAlias ? columnName + " AS " + derivedAlias : columnName;
    }
}

modify to String derivedAlias