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Make RecordSetHeader.ColumnGroups array instead of List<> #364

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Mar 11, 2025
Merged

Make RecordSetHeader.ColumnGroups array instead of List<> #364

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58 changes: 13 additions & 45 deletions Orm/Xtensive.Orm/Orm/Model/ColumnGroup.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -4,51 +4,19 @@
// Created by: Alexey Kochetov
// Created: 2008.08.01

using System;
using System.Collections.Generic;
using System.Diagnostics;
using Xtensive.Collections;


namespace Xtensive.Orm.Model
{
/// <summary>
/// Describes a group of columns that belongs to the specified <see cref="TypeInfoRef"/>.
/// </summary>
[Serializable]
[DebuggerDisplay("Type = {TypeInfoRef}, Keys = {Keys}, Columns = {Columns}")]
public readonly struct ColumnGroup
{
/// <summary>
/// Gets the <see cref="Model.TypeInfoRef"/> pointing to <see cref="TypeInfo"/>
/// this column group belongs to.
/// </summary>
public TypeInfoRef TypeInfoRef { get; }

/// <summary>
/// Gets the indexes of key columns.
/// </summary>
public IReadOnlyList<ColNum> Keys { get; }

/// <summary>
/// Gets the indexes of all columns.
/// </summary>
public IReadOnlyList<ColNum> Columns { get; }


// Constructors

/// <summary>
/// Initializes a new instance of this class.
/// </summary>
/// <param name="type">The type.</param>
/// <param name="keys">The keys.</param>
/// <param name="columns">The columns.</param>
public ColumnGroup(TypeInfoRef type, IReadOnlyList<ColNum> keys, IReadOnlyList<ColNum> columns)
{
TypeInfoRef = type;
Keys = keys;
Columns = columns;
}
}
}
namespace Xtensive.Orm.Model;

/// <summary>
/// Describes a group of columns that belongs to the specified <see cref="TypeInfoRef"/>.
/// </summary>
[Serializable]
[DebuggerDisplay("Type = {TypeInfoRef}, Keys = {Keys}, Columns = {Columns}")]
public record struct ColumnGroup
(
TypeInfoRef TypeInfoRef,
IReadOnlyList<ColNum> Keys, // indexes of key columns.
IReadOnlyList<ColNum> Columns // indexes of all columns.
);
2 changes: 1 addition & 1 deletion Orm/Xtensive.Orm/Orm/Rse/RecordSetHeader.cs
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Expand Up @@ -188,7 +188,7 @@ public RecordSetHeader Select(IReadOnlyList<ColNum> columns)
return new RecordSetHeader(
TupleDescriptor.CreateFromNormalized(columns.Select(i => TupleDescriptor[i]).ToArray(columns.Count)),
columns.Select((oldIndex, newIndex) => Columns[oldIndex].Clone((ColNum) newIndex)).ToArray(columns.Count),
resultGroups.ToList(),
resultGroups.ToArray(),
null,
resultOrder);
}
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