MinFunction.cs

using System;
using Queries.Core.Parts.Columns;
using Queries.Core.Attributes;

namespace Queries.Core.Parts.Functions;

/// <summary>
/// "MIN" function.
/// </summary>
[Function]
public class MinFunction : AggregateFunction
{
    /// <summary>
    /// Buils a new <see cref="MinFunction"/> instance.
    /// </summary>
    /// <param name="column">The column the function will be applied onto</param>
    /// <exception cref="System.ArgumentNullException">if <paramref name="column"/> is <see langword="null" />.</exception>
    public MinFunction(IColumn column)
        : base(AggregateType.Min, column)
    { }

    /// <summary>
    /// Buils a new <see cref="MinFunction"/> instance.
    /// </summary>
    /// <param name="columnName">The column the function will be applied onto</param>
    /// <exception cref="System.ArgumentNullException">if <paramref name="columnName"/> is <see langword="null" />.</exception>
    public MinFunction(string columnName)
        : this(columnName?.Field())
    { }

    /// <summary>
    /// Performs a deep copy of the current instance.
    /// </summary>
    /// <returns><see cref="MinFunction"/></returns>
    public override IColumn Clone() => new MinFunction(Column.Clone());
}