public static object Sum(FunctionContext context, IEnumerable data, ExpressionNode node)
{
int count;
StorageType type;
return(Aggregates.Sum(data, node, context.GlobalContext, nameof(Sum), out count, out type));
}
private static object Mean(
IEnumerable data,
ExpressionNode node,
object context,
string exp,
out int count,
out StorageType type)
{
count = 0;
type = StorageType.Empty;
object obj = Aggregates.Sum(data, node, context, exp, out count, out type);
if (count == 0)
{
return((object)0);
}
switch (type)
{
case StorageType.Char:
return((object)((int)(char)obj / count));
case StorageType.SByte:
case StorageType.Byte:
case StorageType.Int16:
case StorageType.UInt16:
case StorageType.Int32:
case StorageType.UInt32:
return((object)(Convert.ToDouble(obj) / (double)count));
case StorageType.Int64:
case StorageType.UInt64:
return((object)(Convert.ToDecimal(obj) / (Decimal)count));
case StorageType.Single:
return((object)(float)((double)(float)obj / (double)count));
case StorageType.Double:
return((object)((double)obj / (double)count));
case StorageType.Decimal:
case StorageType.String:
return((object)((Decimal)obj / (Decimal)count));
case StorageType.TimeSpan:
return((object)new TimeSpan(((TimeSpan)obj).Ticks / (long)count));
case StorageType.SqlByte:
return((object)((SqlDouble)((SqlByte)obj) / (SqlDouble)((double)count)));
case StorageType.SqlDecimal:
return((object)((SqlDouble)((SqlDecimal)obj) / (SqlDouble)((double)count)));
case StorageType.SqlDouble:
return((object)((SqlDouble)obj / (SqlDouble)((double)count)));
case StorageType.SqlInt16:
return((object)((SqlDouble)((SqlInt16)obj) / (SqlDouble)((double)(short)count)));
case StorageType.SqlInt32:
return((object)((SqlDouble)((SqlInt32)obj) / (SqlDouble)((double)count)));
case StorageType.SqlInt64:
return((object)((SqlDouble)((SqlInt64)obj) / (SqlDouble)((double)count)));
case StorageType.SqlMoney:
return((object)((SqlMoney)obj / (SqlMoney)((long)count)));
case StorageType.SqlSingle:
return((object)((SqlSingle)obj / (SqlSingle)((float)count)));
default:
throw InvalidExpressionException.TypeMismatch(exp);
}
}