Advantage Data Types Mapping
XPO creates these column types when updating the Advantage database schema and expects them in existing databases.
| .NET Type | Database Column Type |
|---|---|
| Boolean | logical |
| Byte | short |
| SByte | short |
| Char | nchar(1) or char(1) |
| Decimal | money |
| Double | double |
| Single | double |
| Int16 | short |
| UInt16 | integer |
| Int32 | integer |
| UInt32 | money |
| Int64 | numeric(20,0) |
| UInt64 | numeric(21,0) |
| Guid | char(36) |
| String | nchar(N) or char(N) |
| DateTime | timestamp |
| TimeSpan | double |
| Byte[] | blob |
| Unlimited size string | nmemo or memo |
Mapping Properties To Database Column Types Not Supported By Default
If a column type is not listed in the above table but can be converted to any of the listed type by the database, it can be read and modified by XPO. To create a column of a specific type in the database when updating the schema, decorate the property with DbTypeAttribute. If a column type cannot be converted to a supported type, it is possible to support such columns by creating a custom connection provider. Here are some examples:
See Also