PostgreSQL to .NET type mapping

Postgresql to .NET type mapping

Type mapping rules from this table are used when generating a model from a database with Entity Data Model Wizard in Visual Studio 2008 - 2015 and Create Model Wizard in Entity Developer.

Postgresql data types	SSDL1	CSDL .NET
boolean	Boolean	System.Boolean
smallint,int2	smallint	Int16	System.Int16
integer,int4	int	Int32	System.Int32
bigint,int8	bigint	Int64	System.Int64
real	Single	System.Single
double precision,money	double precision	Double	System.Double
numeric,decimal,float	Decimal	System.Decimal
date,timestamp,timestamp with time zone,timestamp without time zone	DateTime	System.DateTime
time,time with time zone,time without time zone,interval	Time	System.TimeSpan
timestamp with time zone	datetimeoffset	DateTimeOffset	System.DateTimeOffset
char,varchar,text,citext,enum,bit,varbit,cidr,inet,macaddr,point,line,lseg,box,path,polygon,circle,xml*,character,character varying,bit varying,json,jsonb	String	System.String
bytea	Binary	System.Byte[]
uuid2	uuid	Guid	System.Guid
geometry3	spatial_geometry	Geometry,GeometryCollection,GeometryLinestring,GeometryMultiLinestring,GeometryMultiPoint,GeometryMultipolygon,GeometryPoint,Geometrypolygon	System.Data.Spatial.DbGeometry
geography spatial_geography	Geography,GeographyCollection,GeographyLineString,GeographyMultiLineString,GeographyMultiPoint,GeographyMultiPolygon,GeographyPoint,GeographyPolygon	System.Data.Spatial.DbGeography

¹Note that when mapping corresponding database data type,you will need the .NET type with larger precision. That is because,for example,any Int32 value can be stored in the NUMBER(10) column,but largest NUMBER(10) column value cannot be stored in the Int32 field,it requires Int64 field.

²Uuid and xml data types appeared in Postgresql 8.3.

³Supported in Entity Framework v5 and v6.

.NET to Postgresql default type mapping

.NET	CSDL SSDL PostgreSQL data types
System.Boolean	boolean
System.Byte	Byte	byte	smallint
System.Byte[]	bytea
System.Data.Spatial.DbGeometry Geometry	geometry
System.Data.Spatial.DbGeography Geography	geography
System.DateTime	timestamp	timestamp
System.DateTimeOffset	timestamp with time zone
System.Decimal	numeric	numeric
System.Double	double precision
System.Guid	uuid
System.Int16	System.Int32	integer
System.Int64	bigint
System.SByte	SByte	sbyte	System.Single	real
System.String
System.TimeSpan	timestamp

²Supported in Entity Framework v5 and v6.

DateTimeOffcet type is not supported.