content: /*
   * Copyright (C) 2016-2023 ActionTech.
   * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher.
   */
  
  package com.actiontech.dble.plan.common.item.function.operator.cmpfunc;
  
  import com.actiontech.dble.plan.common.field.Field;
  import com.actiontech.dble.plan.common.item.Item;
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr;
  import com.alibaba.druid.sql.ast.expr.SQLBinaryOperator;
  import com.alibaba.druid.sql.ast.expr.SQLBooleanExpr;
  
  import java.util.List;
  
  
  /**
   * This Item represents a <code>X IS NOT TRUE</code> boolean predicate.
   */
  public class ItemFuncIsnottrue extends ItemFuncTruth {
  
      public ItemFuncIsnottrue(Item a, int charsetIndex) {
          super(a, true, false, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "isnottrue";
      }
  
      @Override
      public SQLExpr toExpression() {
          SQLExpr left = args.get(0).toExpression();
          return new SQLBinaryOpExpr(left, SQLBinaryOperator.IsNot, new SQLBooleanExpr(true));
      }
  
      @Override
      protected Item cloneStruct(boolean forCalculate, List<Item> calArgs, boolean isPushDown, List<Field> fields) {
          List<Item> newArgs = null;
          if (!forCalculate)
              newArgs = cloneStructList(args);
          else
              newArgs = calArgs;
          return new ItemFuncIsnottrue(newArgs.get(0), charsetIndex);
      }
  
  }
  