internal override string DisplayValue(KeyWordInfomation info)
{
DelAggregateFunctionHandle handle = functionHandle;
if (handle != null)
{
string strParam = null;
if (!CommonMethods.IsNull(param))
{
strParam = param.DisplayValue(info);
}
else
{
strParam = "*";
}
if (this.ValueDbType == DbType.Object) //如果此函数为未知返回类型时候就自动转为字段类型
{
_valueDbType = param.ValueDbType;
}
return(handle(strParam, info.DBInfo));
}
return(null);
}
/// <summary>
/// 聚合函数
/// </summary>
/// <param name="functionName">函数名</param>
/// <param name="param"></param>
public BQLAggregateFunction(DelAggregateFunctionHandle functionHandle, BQLParamHandle param)
{
this.functionHandle = functionHandle;
this.param = param;
}
