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.actiontech.dble.plan.common.item.function.operator.ItemBoolFunc2;
  import com.alibaba.druid.sql.ast.SQLExpr;
  import com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr;
  import com.alibaba.druid.sql.ast.expr.SQLBinaryOperator;
  
  import java.math.BigInteger;
  import java.util.List;
  
  
  public class ItemFuncEqual extends ItemBoolFunc2 {
  
      public ItemFuncEqual(Item a, Item b, int charsetIndex) {
          super(a, b, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "=";
      }
  
      @Override
      public Functype functype() {
          return Functype.EQ_FUNC;
      }
  
      @Override
      public BigInteger valInt() {
          int value = cmp.compare();
          return value == 0 ? BigInteger.ONE : BigInteger.ZERO;
      }
  
      @Override
      public SQLExpr toExpression() {
          SQLExpr left = args.get(0).toExpression();
          SQLExpr right = args.get(1).toExpression();
          return new SQLBinaryOpExpr(left, SQLBinaryOperator.Equality, right);
      }
  
      @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 ItemFuncEqual(newArgs.get(0), newArgs.get(1), this.charsetIndex);
      }
  
  }
  