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
|
1 |
Identity=<span>value</span> |
|
Parameter |
Description |
|---|---|
|
value |
A value specifying the syntax for obtaining
|
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
To specify the syntax for obtaining the identity
value of a newly inserted row:
-
Database profile
Select SCOPE_IDENTITY() from the DataWindow Identity
Value drop-down list on the Syntax page in the Database Profile Setup
dialog box. -
Application
Type the following in code:
1SQLCA.DbParameter="Identity='SCOPE_IDENTITY()'"