It would possible also to use 

INSERT INTO ...
RETURNING

as described in DbLinq issue tracker.
This does not require extra statement execution and does not assume that 
currval() returns next number.

Andrus.
  ----- Original Message ----- 
  From: Sami M. Kallio 
  To: [email protected] 
  Sent: Saturday, July 18, 2009 5:38 AM
  Subject: [dblinq] Re: Using SERIAL (auto increment) in PostgreSQL?


  I got it working by hacking the provider:
    class PgsqlSqlProvider : SqlProvider

    {

    public override SqlStatement GetInsertIds(IList<SqlStatement> 
outputParameters, IList<SqlStatement> outputExpressions)

    {

      ...

      ids.Add(outputExpression.Replace("nextval", "currval", true));

      ...

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