/*
 * Copyright 2016-2018 shardingsphere.io.
 * <p>
 * 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.
 * </p>
 */

package io.shardingsphere.core.rewrite.placeholder;

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

/**
 * Aggregation distinct placeholder for rewrite.
 *
 * @author panjuan
 */
@RequiredArgsConstructor
@Getter
public final class AggregationDistinctPlaceholder implements ShardingPlaceholder {
    
    private final String columnName;
    
    private final String logicTableName;
    
    private final Optional<String> autoAlias;
    
    @Override
    public String toString() {
        if (autoAlias.isPresent()) {
            return " " + columnName + " " + autoAlias.get();
        }
        return " " + columnName;
    }
}

@@ -1096,18 +1096,14 @@
 g%3E a
-utoA
 lias;%0A
+
     
@@ -1160,86 +1160,94 @@
     
-if (autoAlias.isPresent()) %7B%0A            return %22 %22 + columnName
+String result = %22 %22 + columnName;%0A        return alias.isPresent() ? result
  + %22
- 
+AS
 %22 + a
-utoA
 lias
@@ -1256,51 +1256,17 @@
 et()
-;%0A        %7D%0A        return %22 %22 + columnName
+ : result
 ;%0A  

modify toString()