content: /*
   * Copyright 1999-2017 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.druid.sql.ast.statement;
  
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.SQLName;
  import com.alibaba.druid.sql.ast.SQLStatementImpl;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class SQLOptimizeStatement extends SQLStatementImpl {
      protected final List<SQLExprTableSource> tableSources = new ArrayList<SQLExprTableSource>();
      protected SQLName cluster;
  
      boolean isFinal;
      boolean deduplicate;
      SQLExpr deduplicateBy;
  
      public boolean isFinal() {
          return isFinal;
      }
  
      public void setFinal(boolean isFinal) {
          this.isFinal = isFinal;
      }
  
      public boolean isDeduplicate() {
          return deduplicate;
      }
  
      public void setDeduplicate(boolean deduplicate) {
          this.deduplicate = deduplicate;
      }
  
      public SQLExpr getDeduplicateBy() {
          return deduplicateBy;
      }
  
      public void setDeduplicateBy(SQLExpr deduplicateBy) {
          this.deduplicateBy = deduplicateBy;
      }
  
      public List<SQLExprTableSource> getTableSources() {
          return tableSources;
      }
  
      public void addTableSource(SQLExprTableSource tableSource) {
          if (tableSource != null) {
              tableSource.setParent(this);
          }
          this.tableSources.add(tableSource);
      }
  
      public SQLName getCluster() {
          return cluster;
      }
  
      public void setCluster(SQLName cluster) {
          this.cluster = cluster;
      }
  
      @Override
      protected void accept0(SQLASTVisitor visitor) {
          if (visitor.visit(this)) {
              acceptChild(visitor, tableSources);
              acceptChild(visitor, cluster);
          }
          visitor.endVisit(this);
      }
  
  }
  