28102732334

Committed 24 Jun 2026 01:39PM UTC coverage: 89.358% (-0.1%) from 89.474%

Build # 28102732334

Build Type

Pull #334

github

Committed by

web-flow

Commit Message

Merge 0037674ea into 38ddceb66

Pull Request Pull Request #334: Add Apache Arrow result streaming to DuckDBCommand

Coverage Stats

1359 of 1583 branches covered (85.85%)

Branch coverage included in aggregate %.

84 of 94 new or added lines in 4 files covered. (89.36%)

6 existing lines in 2 files now uncovered.

2856 of 3134 relevant lines covered (91.13%)

421088.62 hits per line

Source File
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97.0

/DuckDB.NET.Data/Extensions/TypeExtensions.cs

using System.Diagnostics.CodeAnalysis;
using System.Runtime.CompilerServices;

namespace DuckDB.NET.Data.Extensions;

internal static class TypeExtensions
{
    private static readonly HashSet<Type> FloatingNumericTypes = [typeof(decimal), typeof(float), typeof(double)];

    private static readonly HashSet<Type> IntegralNumericTypes =
    [
        typeof(byte), typeof(sbyte),
        typeof(short), typeof(ushort),
        typeof(int), typeof(uint),
        typeof(long), typeof(ulong),
        typeof(BigInteger)
    ];

    private static readonly Dictionary<Type, DuckDBType> ClrToDuckDBTypeMap = new()
    {
        { typeof(bool), DuckDBType.Boolean },
        { typeof(sbyte), DuckDBType.TinyInt },
        { typeof(short), DuckDBType.SmallInt },
        { typeof(int), DuckDBType.Integer },
        { typeof(long), DuckDBType.BigInt },
        { typeof(byte), DuckDBType.UnsignedTinyInt },
        { typeof(ushort), DuckDBType.UnsignedSmallInt },
        { typeof(uint), DuckDBType.UnsignedInteger },
        { typeof(ulong), DuckDBType.UnsignedBigInt },
        { typeof(float), DuckDBType.Float },
        { typeof(double), DuckDBType.Double},
        { typeof(Guid), DuckDBType.Uuid},
        { typeof(DateTime), DuckDBType.Timestamp},
        { typeof(TimeSpan), DuckDBType.Interval},
        { typeof(DateOnly), DuckDBType.Date},
        { typeof(TimeOnly), DuckDBType.Time},
        { typeof(DateTimeOffset), DuckDBType.TimestampTz},
        { typeof(BigInteger), DuckDBType.HugeInt},
        { typeof(string), DuckDBType.Varchar},
        { typeof(byte[]), DuckDBType.Blob},
        { typeof(decimal), DuckDBType.Decimal},
        { typeof(object), DuckDBType.Any},
    };

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static bool IsNull([NotNullWhen(false)] this object? value) => value is null or DBNull;

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static Type UnderlyingTypeOrSelf(this Type type) => Nullable.GetUnderlyingType(type) ?? type;

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static bool IsFloatingNumericType<T>()
    {
        return typeof(T) == typeof(decimal) || typeof(T) == typeof(float) || typeof(T) == typeof(double);
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static bool IsIntegralNumericType<T>()
    {
        return typeof(T) == typeof(byte) || typeof(T) == typeof(sbyte) ||
               typeof(T) == typeof(short) || typeof(T) == typeof(ushort) ||
               typeof(T) == typeof(int) || typeof(T) == typeof(uint) ||
               typeof(T) == typeof(long) || typeof(T) == typeof(ulong) ||
               typeof(T) == typeof(BigInteger);
    }

    public static bool IsNumeric(this Type type)
    {
        return IntegralNumericTypes.Contains(type) || FloatingNumericTypes.Contains(type);
    }

    public static bool AllowsNullValue(this Type type, out bool isNullableValueType, out Type? underlyingType)
    {
        underlyingType = Nullable.GetUnderlyingType(type);
        isNullableValueType = underlyingType != null;

        var isNullable = isNullableValueType || !type.IsValueType;

        return isNullable;
    }

    public static DuckDBLogicalType GetLogicalType<T>() => typeof(T).GetLogicalType();

    public static DuckDBLogicalType GetLogicalType(this Type type)
    {
        type = type.UnderlyingTypeOrSelf();

        if (type == typeof(decimal))
        {
            return NativeMethods.LogicalType.DuckDBCreateDecimalType(38, 18);
        }

        if (type.IsAssignableTo(typeof(IList)) && type.IsGenericType)
        {
            var genericTypeParameter = type.GetGenericArguments()[0];
            using var nestedType = genericTypeParameter.GetLogicalType();
            return NativeMethods.LogicalType.DuckDBCreateListType(nestedType);
        }

        if (ClrToDuckDBTypeMap.TryGetValue(type, out var duckDBType))
        {
            return NativeMethods.LogicalType.DuckDBCreateLogicalType(duckDBType);
        }

        throw new InvalidOperationException($"Cannot map type {type.FullName} to DuckDBType.");
    }

    public static DuckDBType GetDuckDBType(this Type type) => ClrToDuckDBTypeMap.TryGetValue(type, out var duckDBType) ? duckDBType : DuckDBType.Invalid;
}

1	using System.Diagnostics.CodeAnalysis;
2	using System.Runtime.CompilerServices;
3
4	namespace DuckDB.NET.Data.Extensions;
5
6	internal static class TypeExtensions
7	{
8	private static readonly HashSet<Type> FloatingNumericTypes = [typeof(decimal), typeof(float), typeof(double)];	3✔
9
10	private static readonly HashSet<Type> IntegralNumericTypes =	3✔
11	[	3✔
12	typeof(byte), typeof(sbyte),	3✔
13	typeof(short), typeof(ushort),	3✔
14	typeof(int), typeof(uint),	3✔
15	typeof(long), typeof(ulong),	3✔
16	typeof(BigInteger)	3✔
17	];	3✔
18
19	private static readonly Dictionary<Type, DuckDBType> ClrToDuckDBTypeMap = new()	3✔
20	{	3✔
21	{ typeof(bool), DuckDBType.Boolean },	3✔
22	{ typeof(sbyte), DuckDBType.TinyInt },	3✔
23	{ typeof(short), DuckDBType.SmallInt },	3✔
24	{ typeof(int), DuckDBType.Integer },	3✔
25	{ typeof(long), DuckDBType.BigInt },	3✔
26	{ typeof(byte), DuckDBType.UnsignedTinyInt },	3✔
27	{ typeof(ushort), DuckDBType.UnsignedSmallInt },	3✔
28	{ typeof(uint), DuckDBType.UnsignedInteger },	3✔
29	{ typeof(ulong), DuckDBType.UnsignedBigInt },	3✔
30	{ typeof(float), DuckDBType.Float },	3✔
31	{ typeof(double), DuckDBType.Double},	3✔
32	{ typeof(Guid), DuckDBType.Uuid},	3✔
33	{ typeof(DateTime), DuckDBType.Timestamp},	3✔
34	{ typeof(TimeSpan), DuckDBType.Interval},	3✔
35	{ typeof(DateOnly), DuckDBType.Date},	3✔
36	{ typeof(TimeOnly), DuckDBType.Time},	3✔
37	{ typeof(DateTimeOffset), DuckDBType.TimestampTz},	3✔
38	{ typeof(BigInteger), DuckDBType.HugeInt},	3✔
39	{ typeof(string), DuckDBType.Varchar},	3✔
40	{ typeof(byte[]), DuckDBType.Blob},	3✔
41	{ typeof(decimal), DuckDBType.Decimal},	3✔
42	{ typeof(object), DuckDBType.Any},	3✔
43	};	3✔
44
45	[MethodImpl(MethodImplOptions.AggressiveInlining)]
46	public static bool IsNull([NotNullWhen(false)] this object? value) => value is null or DBNull;	12,483✔
47
48	[MethodImpl(MethodImplOptions.AggressiveInlining)]
49	public static Type UnderlyingTypeOrSelf(this Type type) => Nullable.GetUnderlyingType(type) ?? type;	1,446✔
50
51	[MethodImpl(MethodImplOptions.AggressiveInlining)]
52	public static bool IsFloatingNumericType<T>()
53	{
54	return typeof(T) == typeof(decimal) \|\| typeof(T) == typeof(float) \|\| typeof(T) == typeof(double);	4,039,452✔
55	}
56
57	[MethodImpl(MethodImplOptions.AggressiveInlining)]
58	public static bool IsIntegralNumericType<T>()
59	{
60	return typeof(T) == typeof(byte) \|\| typeof(T) == typeof(sbyte) \|\|	4,039,452✔
61	typeof(T) == typeof(short) \|\| typeof(T) == typeof(ushort) \|\|	4,039,452✔
62	typeof(T) == typeof(int) \|\| typeof(T) == typeof(uint) \|\|	4,039,452✔
63	typeof(T) == typeof(long) \|\| typeof(T) == typeof(ulong) \|\|	4,039,452✔
64	typeof(T) == typeof(BigInteger);	4,039,452✔
65	}
66
67	public static bool IsNumeric(this Type type)
68	{
69	return IntegralNumericTypes.Contains(type) \|\| FloatingNumericTypes.Contains(type);	9,609,273✔
70	}
71
72	public static bool AllowsNullValue(this Type type, out bool isNullableValueType, out Type? underlyingType)
73	{
74	underlyingType = Nullable.GetUnderlyingType(type);	1,042,244✔
75	isNullableValueType = underlyingType != null;	1,042,244✔
76
77	var isNullable = isNullableValueType \|\| !type.IsValueType;	1,042,244✔
78
79	return isNullable;	308,129✔
80	}
81
82	public static DuckDBLogicalType GetLogicalType<T>() => typeof(T).GetLogicalType();	246✔
83
84	public static DuckDBLogicalType GetLogicalType(this Type type)
85	{
86	type = type.UnderlyingTypeOrSelf();	1,413✔
87
88	if (type == typeof(decimal))	1,413✔
89	{
90	return NativeMethods.LogicalType.DuckDBCreateDecimalType(38, 18);	93✔
91	}
92
93	if (type.IsAssignableTo(typeof(IList)) && type.IsGenericType)	1,320✔
94	{
95	var genericTypeParameter = type.GetGenericArguments()[0];	42✔
96	using var nestedType = genericTypeParameter.GetLogicalType();	42✔
97	return NativeMethods.LogicalType.DuckDBCreateListType(nestedType);	42✔
98	}
99
100	if (ClrToDuckDBTypeMap.TryGetValue(type, out var duckDBType))	1,278!
101	{
102	return NativeMethods.LogicalType.DuckDBCreateLogicalType(duckDBType);	1,278✔
103	}
104
UNCOV 105	throw new InvalidOperationException($"Cannot map type {type.FullName} to DuckDBType.");	×
106	}	42✔
107
108	public static DuckDBType GetDuckDBType(this Type type) => ClrToDuckDBTypeMap.TryGetValue(type, out var duckDBType) ? duckDBType : DuckDBType.Invalid;	33!
109	}

Giorgi / DuckDB.NET / 28102732334

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