Type Mapping

This article is relevant to entity models that utilize the deprecated Visual Studio integration of Telerik Data Access. The current documentation of the Data Access framework is available here.

Telerik Data Access supports flexible mappings from .NET types (e.g., System.String) to database specific SQL types (e.g., VARCHAR on Firebird). The default mappings can be customized for a specific datastore. The mapping for specific fields can also be customized. Mappings are resolved by first using any information specified for the field, then looking up a generic type for the type of the field using the .NET Type Mapping, then converting this generic type into actual SQL type information using the Generic Type Mapping. You can have different mapping information for each database supported by Telerik Data Access.

The following table shows the default mapping from .NET types to Firebird specific types:

.NET Type	Firebird Type
System.Boolean	SMALLINT
System.Char	CHAR(1)
System.SByte	SMALLINT
System.Byte	SMALLINT
System.Int16	SMALLINT
System.UInt16	INTEGER
System.Int32	INTEGER
System.UInt32	BIGINT
System.Int64	BIGINT
System.UInt64	BIGINT
System.Single	FLOAT
System.Double	DOUBLE PRECISION
System.String	VARCHAR(190)
System.DateTime	TIMESTAMP
System.Decimal	NUMERIC(18,8)
System.Guid	CHAR(16)
Byte[]	BLOB