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Ticket UUID: 0ed01c447cb7d1777aad43ceec8010933cf322e1
Title: guid and uniqueidentifier has incorrect ProviderDbType value
Status: Closed Type: Code_Defect
Severity: Important Priority: Medium
Subsystem: Connection Resolution: Fixed
Last Modified: 2016-08-25 01:53:00
Version Found In:
User Comments:
anonymous added on 2016-06-24 20:04:20:
I am attempting to use F# SqlProvider as well as GUID columns (to enable simplified syncing between databases).  I found that specifying uniqueidentifier as the column type worked (they appeared as a property of type Guid by the type provider), but an insert would always fail, stating that a Guid could not be cast to an IConvertable.  What I found is that the type provider was attempting to map System.Guid to DbType.Currency.  After a bit of research, I found that SQLiteConnection.GetSchema("DataTypes") reported both 'guid' and 'uniqueidentifier' as a System.Guid as the CLR data type, but was using the value of 4 for ProviderDbType, which maps to DbType.Currency.  DbType.Guid is actually 9.  This causes the parameters for insert commands to have a value of type System.Guid, but have a database type of DbType.Currency, which System.Data.SQLite attempts to load as a double by calling IConvertable.ToDouble() (along with DbType.Double and DbType.Single).  I believe this can be fixed by modifying Resources\DbTypes.xml such that the last two items have a ProviderDbType value of 9 instead of 4.

mistachkin added on 2016-06-24 20:47:22:
Thanks for the report.

mistachkin added on 2016-06-24 20:56:23:
Preliminary fix checked-in on trunk [81cf9aaddb1f1adc].  Still needs tests.

mistachkin added on 2016-08-25 01:53:00:
Tests added on trunk.