/// <summary>
/// Return the approximate distinct count using the APPROX_COUNT_DISTINCT function.
/// </summary>
/// <param name="tableDbCommand">The table database command.</param>
/// <param name="columnName">Name of the column.</param>
public static ILink <long> AsCountDistinctApproximate(this TableDbCommandBuilder <SqlCommand, SqlParameter, SqlServerLimitOption> tableDbCommand, string columnName)
{
if (tableDbCommand == null)
{
throw new ArgumentNullException(nameof(tableDbCommand), $"{nameof(tableDbCommand)} is null.");
}
return(((ISupportsApproximateCount)tableDbCommand).AsCountApproximate(columnName));
}
/// <summary>
/// Allows compilation of the ToObject and ToCollection materializer.
/// </summary>
/// <typeparam name="TCommand">The type of the command.</typeparam>
/// <typeparam name="TParameter">The type of the parameter.</typeparam>
/// <typeparam name="TLimit">The type of the limit option.</typeparam>
/// <typeparam name="TObject">The type of the object to be constructed.</typeparam>
/// <param name="commandBuilder">The command builder.</param>
public static CompiledMultipleRow <TCommand, TParameter, TObject> Compile <TCommand, TParameter, TLimit, TObject>(this TableDbCommandBuilder <TCommand, TParameter, TLimit, TObject> commandBuilder)
where TCommand : DbCommand
where TParameter : DbParameter
where TLimit : struct //really an enum
where TObject : class, new()
{
return(new CompiledMultipleRow <TCommand, TParameter, TObject>(commandBuilder));
}
