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.controlfunc;
  
  import com.actiontech.dble.plan.common.MySQLcom;
  import com.actiontech.dble.plan.common.item.Item;
  import com.actiontech.dble.plan.common.item.function.ItemFunc;
  import com.actiontech.dble.plan.common.item.function.operator.cmpfunc.ItemFuncCoalesce;
  import com.actiontech.dble.plan.common.time.MySQLTime;
  
  import java.math.BigDecimal;
  import java.math.BigInteger;
  import java.util.List;
  
  
  public class ItemFuncIfnull extends ItemFuncCoalesce {
      public ItemFuncIfnull(List<Item> args, int charsetIndex) {
          super(args, charsetIndex);
      }
  
      @Override
      public final String funcName() {
          return "ifnull";
      }
  
      @Override
      public void fixLengthAndDec() {
          hybridType = MySQLcom.aggResultType(args, 0, 2);
          cachedFieldType = MySQLcom.aggFieldType(args, 0, 2);
          maybeNull = args.get(1).isMaybeNull();
          decimals = Math.max(args.get(0).getDecimals(), args.get(1).getDecimals());
      }
  
      @Override
      public int decimalPrecision() {
          int arg0IntPart = args.get(0).decimalIntPart();
          int arg1IntPart = args.get(1).decimalIntPart();
          int maxIntPart = Math.max(arg0IntPart, arg1IntPart);
          int precision = maxIntPart + decimals;
          return Math.min(precision, MySQLcom.DECIMAL_MAX_PRECISION);
      }
  
      @Override
      public BigDecimal realOp() {
          BigDecimal value = args.get(0).valReal();
          if (!args.get(0).isNullValue()) {
              nullValue = false;
              return value;
          }
          value = args.get(1).valReal();
          if ((nullValue = args.get(1).isNullValue()))
              return BigDecimal.ZERO;
          return value;
      }
  
      @Override
      public BigInteger intOp() {
          BigInteger value = args.get(0).valInt();
          if (!args.get(0).isNullValue()) {
              nullValue = false;
              return value;
          }
          value = args.get(1).valInt();
          if ((nullValue = args.get(1).isNullValue()))
              return BigInteger.ZERO;
          return value;
      }
  
      @Override
      public String strOp() {
          String value = args.get(0).valStr();
          if (!args.get(0).isNullValue()) {
              nullValue = false;
              return value;
          }
          value = args.get(1).valStr();
          if ((nullValue = args.get(1).isNullValue()))
              return null;
          return value;
      }
  
      @Override
      public BigDecimal decimalOp() {
          BigDecimal value = args.get(0).valDecimal();
          if (!args.get(0).isNullValue()) {
              nullValue = false;
              return value;
          }
          value = args.get(1).valDecimal();
          if ((nullValue = args.get(1).isNullValue()))
              return null;
          return value;
      }
  
      @Override
      public boolean dateOp(MySQLTime ltime, long fuzzydate) {
          if (!args.get(0).getDate(ltime, fuzzydate))
              return (nullValue = false);
          return (nullValue = args.get(1).getDate(ltime, fuzzydate));
      }
  
      @Override
      public boolean timeOp(MySQLTime ltime) {
          if (!args.get(0).getTime(ltime))
              return (nullValue = false);
          return (nullValue = args.get(1).getTime(ltime));
      }
  
      @Override
      public ItemFunc nativeConstruct(List<Item> realArgs) {
          return new ItemFuncIfnull(realArgs, charsetIndex);
      }
  }
  