System.Data 2.0.0.0 System.Attribute System.AttributeUsage(System.AttributeTargets.Property | System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.ReturnValue, AllowMultiple=false, Inherited=false)

may only be specified on non-void return values.

is used only to derive information about the return type, and is not intended to be a constraint specification on what can be stored in the type. Thus, if a field has a indicating its size to be 2 characters, then the SQL Server type of the field access expression is of size 2, but assignments into the field are not restricted by this facet.

The table below captures the matrix of valid values for the various properties for specific field types. In this table, "Y" indicates that the property is valid, and "N" indicates that the property is not valid.

The specified must be compatible with the field type. If the property is not valid, type registration will report an error if the user specifies a non-default value for the property. The maximum values for and properties are 38. For the property, the value should be in the range of 1-8000 for binary and non-Unicode data, 1-4000 for Unicode data, or -1. All other values are not valid.

Type

IsFixedLength

MaxSize

Precision

Scale

IsNullable

N

N

N

N

Y

N

N

N

N

Y

N

N

N

N

Y

N

N

N

N

Y

N

N

N

N

Y

N

N

N

N

Y

N

N

N

N

Y

N

N

N

N

Y

N

N

N

N

Y

N

N

N

N

Y

N

N

Y

Y

Y

Y

Y

N

N

Y

Y

Y

N

N

Y

N

N

N

N

Y

Y

Y

N

N

Y

Y

Y

N

N

Y

Embedded UDTs

N

N

N

N

Y

Y

Y

N

N

Y

Byte[]

Y

Y

N

N

Y

Char[]

Y

Y

N

N

Y

N

N

N

Y1

N

N

N

Y

Y

Y

(1) Specifying the scale on a DateTime type will cause the value to be returned to Transact-SQL as a DateTime2 type with the specified scale.

Annotates the returned result of a user-defined type (UDT) with additional information that can be used in Transact-SQL.

- Constructor
  To be added.

  An optional attribute on a user-defined type (UDT) return type, used to annotate the returned result with additional information that can be used in Transact-SQL.

  2.0.0.0
- Property
  System.Boolean To be added.

  This property must be set to false if the property is set to 1.

  The default value is false.

  Indicates whether the return type of the user-defined type is of a fixed length.

  2.0.0.0
- Property
  System.Boolean To be added.

  The default value is true.

  Indicates whether the return type of the user-defined type can be null.

  2.0.0.0
- Property
  System.Int32 To be added.

  Logical unit is bytes (with a maximum size of 8000) for the binary and non-Unicode data types, and the number of Unicode characters (with a maximum size of 4000) for the character field types.

  The value -1 is reserved for large character and binary types.

  The default value is 4000 for Unicode character types and 8000 for binary and non-Unicode types.

  The maximum size, in logical units, of the underlying field type of the user-defined type.

  2.0.0.0
- Property
  System.Int32 To be added.

  The property is valid only for numeric types. The property must also be specified when setting the property.

  The maximum value of the property is 38; the default value is 38.

  The precision of the return type of the user-defined type.

  2.0.0.0
- Property
  System.Int32 To be added.

  The property is valid only for decimal types. The property must also be specified when setting the property.

  The maximum value of the property is 38; the default value is 0.

  The scale of the return type of the user-defined type.

  2.0.0.0