content: package com.alibaba.druid.sql.dialect.bigquery.ast;
  
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.expr.SQLAliasedExpr;
  import com.alibaba.druid.sql.ast.statement.SQLExecuteImmediateStatement;
  import com.alibaba.druid.sql.dialect.bigquery.visitor.BigQueryVisitor;
  import com.alibaba.druid.sql.visitor.SQLASTVisitor;
  
  import java.util.ArrayList;
  import java.util.List;
  
  public class BigQueryExecuteImmediateStatement
          extends SQLExecuteImmediateStatement {
      private final List<SQLAliasedExpr> using = new ArrayList<>();
  
      public List<SQLAliasedExpr> getUsing() {
          return using;
      }
  
      public void addUsing(SQLExpr x) {
          x.setParent(this);
          using.add(new SQLAliasedExpr(x));
      }
  
      public void addUsing(SQLExpr x, String alias) {
          x.setParent(this);
          using.add(new SQLAliasedExpr(x, alias));
      }
  
      @Override
      public void accept0(SQLASTVisitor v) {
          if (v instanceof BigQueryVisitor) {
              accept0((BigQueryVisitor) v);
          } else {
              super.accept0(v);
          }
      }
  
      public void accept0(BigQueryVisitor v) {
          if (v.visit(this)) {
              acceptChild(v);
          }
      }
  
      protected void acceptChild(SQLASTVisitor v) {
          super.acceptChild(v);
          acceptChild(v, using);
      }
  
      protected BigQueryExecuteImmediateStatement cloneTo(BigQueryExecuteImmediateStatement x) {
          super.cloneTo(x);
          for (SQLAliasedExpr item : using) {
              SQLAliasedExpr item2 = item.clone();
              item2.setParent(x);
              x.using.add(item2);
          }
          return x;
      }
  
      public BigQueryExecuteImmediateStatement clone() {
          BigQueryExecuteImmediateStatement x = new BigQueryExecuteImmediateStatement();
          cloneTo(x);
          return x;
      }
  }
  