public SqlQueryable <T> Avg(Expression <Func <T, object> > expression)
{
if (expression == null)
{
throw new ArgumentNullException("avg expression", "Value cannot be null");
}
this._sqlBuilder.SetSqlCommandType(SqlCommandType.Calculate);
this.Clear();
SqlProvider.Avg(expression.Body, this._sqlBuilder);
return(this);
}
protected override SqlBuilder Avg(ParameterExpression expression, SqlBuilder sqlBuilder)
{
SqlProvider.Avg(expression, sqlBuilder);
return(sqlBuilder);
}
protected override SqlBuilder Avg(UnaryExpression expression, SqlBuilder sqlBuilder)
{
SqlProvider.Avg(expression.Operand, sqlBuilder);
return(sqlBuilder);
}