22921736195

Committed 10 Mar 2026 07:24PM UTC coverage: 89.526% (+0.08%) from 89.45%

Build # 22921736195

Build Type

push

github

Committed by

Giorgi

Commit Message

Update global.json

Coverage Stats

1255 of 1463 branches covered (85.78%)

Branch coverage included in aggregate %.

2651 of 2900 relevant lines covered (91.41%)

447643.55 hits per line

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90.59

/DuckDB.NET.Data/DuckDBAppender.cs

﻿using DuckDB.NET.Data.Common;
using DuckDB.NET.Data.DataChunk.Writer;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;

namespace DuckDB.NET.Data;

public class DuckDBAppender : IDisposable
{
    private bool closed;
    private readonly Native.DuckDBAppender nativeAppender;
    private readonly string qualifiedTableName;

    private ulong rowCount;

    private readonly DuckDBLogicalType[] logicalTypes;
    private readonly DuckDBDataChunk dataChunk;
    private readonly VectorDataWriterBase[] vectorWriters;

    internal DuckDBAppender(Native.DuckDBAppender appender, string qualifiedTableName)
    {
        nativeAppender = appender;
        this.qualifiedTableName = qualifiedTableName;

        var columnCount = NativeMethods.Appender.DuckDBAppenderColumnCount(nativeAppender);

        vectorWriters = new VectorDataWriterBase[columnCount];
        logicalTypes = new DuckDBLogicalType[columnCount];
        var logicalTypeHandles = new IntPtr[columnCount];

        for (ulong index = 0; index < columnCount; index++)
        {
            logicalTypes[index] = NativeMethods.Appender.DuckDBAppenderColumnType(nativeAppender, index);
            logicalTypeHandles[index] = logicalTypes[index].DangerousGetHandle();
        }

        dataChunk = NativeMethods.DataChunks.DuckDBCreateDataChunk(logicalTypeHandles, columnCount);
    }

    /// <summary>
    /// Gets the logical types of the columns in the appender.
    /// </summary>
    internal IReadOnlyList<DuckDBLogicalType> LogicalTypes => logicalTypes;

    public IDuckDBAppenderRow CreateRow()
    {
        if (closed)
        {
            throw new InvalidOperationException("Appender is already closed");
        }

        if (rowCount % DuckDBGlobalData.VectorSize == 0)
        {
            AppendDataChunk();

            InitVectorWriters();

            rowCount = 0;
        }

        rowCount++;
        return new DuckDBAppenderRow(qualifiedTableName, vectorWriters, rowCount - 1, dataChunk, nativeAppender);
    }

    public void Clear()
    {
        if (closed)
        {
            throw new InvalidOperationException("Appender is already closed");
        }
        
        var state = NativeMethods.Appender.DuckDBAppenderClear(nativeAppender);
        if (!state.IsSuccess())
        {
            ThrowLastError(nativeAppender);
        }

        rowCount = 0;
        NativeMethods.DataChunks.DuckDBDataChunkReset(dataChunk);
    }

    public void Close()
    {
        closed = true;

        try
        {
            AppendDataChunk();

            foreach (var logicalType in logicalTypes)
            {
                logicalType.Dispose();
            }

            foreach (var writer in vectorWriters)
            {
                writer?.Dispose();
            }

            dataChunk.Dispose();

            var state = NativeMethods.Appender.DuckDBAppenderClose(nativeAppender);
            if (!state.IsSuccess())
            {
                ThrowLastError(nativeAppender);
            }
        }
        finally
        {
            nativeAppender.Close();
        }
    }

    public void Dispose()
    {
        if (!closed)
        {
            Close();
        }
    }

    private void InitVectorWriters()
    {
        for (long index = 0; index < vectorWriters.LongLength; index++)
        {
            var vector = NativeMethods.DataChunks.DuckDBDataChunkGetVector(dataChunk, index);

            vectorWriters[index]?.Dispose();
            vectorWriters[index] = VectorDataWriterFactory.CreateWriter(vector, logicalTypes[index]);
        }
    }

    private void AppendDataChunk()
    {
        NativeMethods.DataChunks.DuckDBDataChunkSetSize(dataChunk, rowCount);
        var state = NativeMethods.Appender.DuckDBAppendDataChunk(nativeAppender, dataChunk);

        if (!state.IsSuccess())
        {
            ThrowLastError(nativeAppender);
        }

        NativeMethods.DataChunks.DuckDBDataChunkReset(dataChunk);
    }

    [DoesNotReturn]
    [StackTraceHidden]
    internal static void ThrowLastError(Native.DuckDBAppender appender)
    {
        var errorMessage = NativeMethods.Appender.DuckDBAppenderError(appender);

        throw new DuckDBException(errorMessage);
    }
}

1	using DuckDB.NET.Data.Common;
2	using DuckDB.NET.Data.DataChunk.Writer;
3	using System.Diagnostics;
4	using System.Diagnostics.CodeAnalysis;
5
6	namespace DuckDB.NET.Data;
7
8	public class DuckDBAppender : IDisposable
9	{
10	private bool closed;
11	private readonly Native.DuckDBAppender nativeAppender;
12	private readonly string qualifiedTableName;
13
14	private ulong rowCount;
15
16	private readonly DuckDBLogicalType[] logicalTypes;
17	private readonly DuckDBDataChunk dataChunk;
18	private readonly VectorDataWriterBase[] vectorWriters;
19
20	internal DuckDBAppender(Native.DuckDBAppender appender, string qualifiedTableName)	210✔
21	{
22	nativeAppender = appender;	210✔
23	this.qualifiedTableName = qualifiedTableName;	210✔
24
25	var columnCount = NativeMethods.Appender.DuckDBAppenderColumnCount(nativeAppender);	210✔
26
27	vectorWriters = new VectorDataWriterBase[columnCount];	210✔
28	logicalTypes = new DuckDBLogicalType[columnCount];	210✔
29	var logicalTypeHandles = new IntPtr[columnCount];	210✔
30
31	for (ulong index = 0; index < columnCount; index++)	1,740✔
32	{
33	logicalTypes[index] = NativeMethods.Appender.DuckDBAppenderColumnType(nativeAppender, index);	660✔
34	logicalTypeHandles[index] = logicalTypes[index].DangerousGetHandle();	660✔
35	}
36
37	dataChunk = NativeMethods.DataChunks.DuckDBCreateDataChunk(logicalTypeHandles, columnCount);	210✔
38	}	210✔
39
40	/// <summary>
41	/// Gets the logical types of the columns in the appender.
42	/// </summary>
43	internal IReadOnlyList<DuckDBLogicalType> LogicalTypes => logicalTypes;	9✔
44
45	public IDuckDBAppenderRow CreateRow()
46	{
47	if (closed)	430,050✔
48	{
49	throw new InvalidOperationException("Appender is already closed");	3✔
50	}
51
52	if (rowCount % DuckDBGlobalData.VectorSize == 0)	430,047✔
53	{
54	AppendDataChunk();	297✔
55
56	InitVectorWriters();	297✔
57
58	rowCount = 0;	297✔
59	}
60
61	rowCount++;	430,047✔
62	return new DuckDBAppenderRow(qualifiedTableName, vectorWriters, rowCount - 1, dataChunk, nativeAppender);	430,047✔
63	}
64
65	public void Clear()
66	{
67	if (closed)	6!
68	{
69	throw new InvalidOperationException("Appender is already closed");	×
70	}
71
72	var state = NativeMethods.Appender.DuckDBAppenderClear(nativeAppender);	6✔
73	if (!state.IsSuccess())	6!
74	{
75	ThrowLastError(nativeAppender);	×
76	}
77
78	rowCount = 0;	6✔
79	NativeMethods.DataChunks.DuckDBDataChunkReset(dataChunk);	6✔
80	}	6✔
81
82	public void Close()
83	{
84	closed = true;	204✔
85
86	try
87	{
88	AppendDataChunk();	204✔
89
90	foreach (var logicalType in logicalTypes)	1,686✔
91	{
92	logicalType.Dispose();	639✔
93	}
94
95	foreach (var writer in vectorWriters)	1,686✔
96	{
97	writer?.Dispose();	639✔
98	}
99
100	dataChunk.Dispose();	204✔
101
102	var state = NativeMethods.Appender.DuckDBAppenderClose(nativeAppender);	204✔
103	if (!state.IsSuccess())	204!
104	{
105	ThrowLastError(nativeAppender);	×
106	}
107	}	204✔
108	finally
109	{
110	nativeAppender.Close();	204✔
111	}	204✔
112	}	204✔
113
114	public void Dispose()
115	{
116	if (!closed)	201✔
117	{
118	Close();	195✔
119	}
120	}	201✔
121
122	private void InitVectorWriters()
123	{
124	for (long index = 0; index < vectorWriters.LongLength; index++)	2,310✔
125	{
126	var vector = NativeMethods.DataChunks.DuckDBDataChunkGetVector(dataChunk, index);	858✔
127
128	vectorWriters[index]?.Dispose();	858✔
129	vectorWriters[index] = VectorDataWriterFactory.CreateWriter(vector, logicalTypes[index]);	858✔
130	}
131	}	297✔
132
133	private void AppendDataChunk()
134	{
135	NativeMethods.DataChunks.DuckDBDataChunkSetSize(dataChunk, rowCount);	501✔
136	var state = NativeMethods.Appender.DuckDBAppendDataChunk(nativeAppender, dataChunk);	501✔
137
138	if (!state.IsSuccess())	501!
139	{
140	ThrowLastError(nativeAppender);	×
141	}
142
143	NativeMethods.DataChunks.DuckDBDataChunkReset(dataChunk);	501✔
144	}	501✔
145
146	[DoesNotReturn]
147	[StackTraceHidden]
148	internal static void ThrowLastError(Native.DuckDBAppender appender)
149	{
150	var errorMessage = NativeMethods.Appender.DuckDBAppenderError(appender);	3✔
151
152	throw new DuckDBException(errorMessage);	3✔
153	}
154	}

Giorgi / DuckDB.NET / 22921736195

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