forked from npgsql/npgsql
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathUnrecognizedTypeHandler.cs
More file actions
executable file
·60 lines (57 loc) · 2.47 KB
/
UnrecognizedTypeHandler.cs
File metadata and controls
executable file
·60 lines (57 loc) · 2.47 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
#region License
// The PostgreSQL License
//
// Copyright (C) 2015 The Npgsql Development Team
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph and the following two paragraphs appear in all copies.
//
// IN NO EVENT SHALL THE NPGSQL DEVELOPMENT TEAM BE LIABLE TO ANY PARTY
// FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
// INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
// DOCUMENTATION, EVEN IF THE NPGSQL DEVELOPMENT TEAM HAS BEEN ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
// THE NPGSQL DEVELOPMENT TEAM SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE NPGSQL DEVELOPMENT TEAM HAS NO OBLIGATIONS
// TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
#endregion
using NpgsqlTypes;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using Npgsql.BackendMessages;
namespace Npgsql.TypeHandlers
{
/// <summary>
/// Handles "conversions" for columns sent by the database with unknown OIDs.
/// This differs from TextHandler in that its a text-only handler (we don't want to receive binary
/// representations of the types registered here).
/// Note that this handler is also used in the very initial query that loads the OID mappings
/// (chicken and egg problem).
/// Also used for sending parameters with unknown types (OID=0)
/// </summary>
internal class UnrecognizedTypeHandler : TextHandler
{
internal UnrecognizedTypeHandler()
{
OID = 0;
PgName = "<unknown>";
}
internal override void PrepareRead(NpgsqlBuffer buf, FieldDescription fieldDescription, int len)
{
if (fieldDescription.IsBinaryFormat) {
buf.Skip(len);
throw new SafeReadException(new NotSupportedException(
$"The field '{fieldDescription.Name}' has a type currently unknown to Npgsql (OID {fieldDescription.OID}). You can retrieve it as a string by marking it as unknown, please see the FAQ."));
}
base.PrepareRead(buf, fieldDescription, len);
}
}
}