GUID Type coversion error
-------------------------
Key: DNET-376
URL: http://tracker.firebirdsql.org/browse/DNET-376
Project: .NET Data provider
Issue Type: Bug
Components: ADO.NET Provider
Affects Versions: 2.6
Environment: Firebird 2.5
Reporter: ssdi
Assignee: Jiri Cincura
My first post - http://216.121.112.228/browse/NH-2618 .
Firebird 2.5 store Uuid into left to right convetion as "CHAR(16) CHARACTER SET
OCTETS" (see http://www.firebirdfaq.org/faq98/ ). But ADO.NET Provider
constructs System.Guid with System.Guid(byte[]) constructor, but
System.GuidType shoul be constructed with Guid(int a, short b, short c, byte d,
byte e, byte f, byte g, byte h, byte i, byte j, byte k) for correct
representation. Also see Firebird 2.5 builtin fuctions UUID_TO_CHAR() and
CHAR_TO_UUID().
System.Guid reflection:
{{{
// Creates a new guid from an array of bytes.
//
public Guid(byte[] b)
{
if (b==null)
throw new ArgumentNullException("b");
if (b.Length != 16)
throw new
ArgumentException(String.Format(CultureInfo.CurrentCulture,
Environment.GetResourceString("Arg_GuidArrayCtor"), "16"));
_a = ((int)b[3] << 24) | ((int)b[2] << 16) | ((int)b[1] << 8) |
b[0];
_b = (short)(((int)b[5] << 8) | b[4]);
_c = (short)(((int)b[7] << 8) | b[6]);
_d = b[8];
_e = b[9];
_f = b[10];
_g = b[11];
_h = b[12];
_i = b[13];
_j = b[14];
_k = b[15];
}
// Creates a new GUID initialized to the value represented by the
// arguments. The bytes are specified like this to avoid endianness
issues.
//
public Guid(int a, short b, short c, byte d, byte e, byte f, byte g,
byte h, byte i, byte j, byte k)
{
_a = a;
_b = b;
_c = c;
_d = d;
_e = e;
_f = f;
_g = g;
_h = h;
_i = i;
_j = j;
_k = k;
}
}}}
NUnit test:
{{{
[Test]
public void GuidMappingTest()
{
FbCommand createTable = new FbCommand("CREATE TABLE
GUID_TEST (INT_FIELD INTEGER, GUID_FIELD CHAR(16) CHARACTER SET OCTETS)",
Connection);
createTable.ExecuteNonQuery();
createTable.Dispose();
var patternGuid = Guid.NewGuid();
// Insert the Guid
FbCommand insert = new FbCommand("INSERT INTO GUID_TEST
(INT_FIELD, GUID_FIELD) VALUES (@IntField, @GuidValue)", Connection);
insert.Parameters.Add("@IntField",
FbDbType.Integer).Value = this.GetId();
insert.Parameters.Add("@GuidValue", FbDbType.Guid).Value = patternGuid;
insert.ExecuteNonQuery();
insert.Dispose();
// Select the value
FbCommand select = new FbCommand("SELECT INT_FIELD, GUID_FIELD,
UUID_TO_CHAR(GUID_FIELD) AS FBGUID FROM GUID_TEST", Connection);
using (FbDataReader r = select.ExecuteReader())
{
if (r.Read())
{
var providerGuid = r.GetGuid(1);
Console.WriteLine("patternGuid = {0}", patternGuid);
Console.WriteLine("providerGuid = {0}", providerGuid);
Assert.AreEqual(patternGuid, providerGuid);
var fbGuidStr = r.GetString(2);
var fbGuid = new Guid(fbGuidStr);
Console.WriteLine("rfc4122Guid = {0}", fbGuid);
Assert.AreEqual(patternGuid, fbGuid);
}
}
}
}}}
Execution Result:
{{{
GuidMappingTest: Failed
Command:
CREATE TABLE GUID_TEST (INT_FIELD INTEGER, GUID_FIELD CHAR(16) CHARACTER SET
OCTETS)
Command:
INSERT INTO GUID_TEST (INT_FIELD, GUID_FIELD) VALUES (@IntField, @GuidValue)
Name:@IntField Type:Integer Value:-169522060
Name:@GuidValue Type:Guid Value:f470fb5b-fbbd-412e-83f9-eb14aa132ad9
Command:
SELECT INT_FIELD, GUID_FIELD, UUID_TO_CHAR(GUID_FIELD) AS FBGUID FROM GUID_TEST
patternGuid = f470fb5b-fbbd-412e-83f9-eb14aa132ad9
providerGuid = f470fb5b-fbbd-412e-83f9-eb14aa132ad9
rfc4122Guid = 5bfb70f4-bdfb-2e41-83f9-eb14aa132ad9
Expected: f470fb5b-fbbd-412e-83f9-eb14aa132ad9
But was: 5bfb70f4-bdfb-2e41-83f9-eb14aa132ad9
}}}
Best regards,
Eugenyi Vinogradnyi (aka ssdi).
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