List<String> targetSql = new ArrayList<>();
    targetSql.add("select 'targetType','targetId','targetText' from ${tableName} where 1=0 ");
    TargetTypeEnum.getTargetLeftJoinUnionAllSql(targetSql,getNeedTargetTypeEnums());

=========

    public TargetTypeEnum[] getNeedTargetTypeEnums() {
        //下面代码建议配置到指定的TargetType，例如：TargetTypeEnum.FcUserEntity.setTargetTextColumn("userNickName")
        return new TargetTypeEnum[]{};
    }