Identity database parameter

Description

Specifies the syntax the SNC database
interface uses to obtain the identity value of a new row in a database
table.When a DataWindow update request inserts a new row into a
Microsoft SQL Server table that
contains an IDENTITY column, the DataWindow engine calls the SNC interface to obtain the identity
value of the newly inserted row. The Identity database parameter
allows you to define how this request is implemented.

Controls

• SNC SQL Native Client for Microsoft SQL Server

Syntax

Parameter	Description
value	A value specifying the syntax for obtaining the identity value of a newly inserted row. Values are: @@IDENTITY (Default) Use the syntax SELECT @@identity. IDENT_CURRENT() Use the syntax SELECT IDENT_CURRENT('tablename'). SCOPE_IDENTITY() Use the syntax SELECT scope_identity().

Default

Identity=”@@IDENTITY”

Usage

By default, the SNC interface
issues SELECT @@identity to
obtain the IDENTITY column value of the newly inserted row. It returns
the last IDENTITY value produced on a connection, regardless of
the table that produced the value, and regardless of the scope of
the statement that produced the value.

SELECT IDENT_CURRENT('tablename') returns
the last IDENTITY value produced in a table, regardless of the connection
that created the value, and regardless of the scope of the statement
that produced the value.

SELECT SCOPE_IDENTITY() returns
the last IDENTITY value produced on a table and by a statement in
the same scope, regardless of the table that produced the value.

Because Identity is a dynamic database parameter, it can be
set and reset at any time during an application.

Examples

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