Just thinking aloud, but consider:
SELECT INTO _var1 COALESCE(_var1 || col1, _var1) FROM tbl1 WHERE col2 = 1
I think that, or something along that lines, should do the trick.
Lee.
Patrick FICHE writes:
> Hi,
>
> I'm porting an application built upon stored procedures from SQL Server to
> PostgreSQL.
> Most of the work was done without too many problems but now I'm testing and
> I'm facing to a comportment which seems to be different.
>
> In SQL Server, if you do :
> SELECT @var1 = @var1 + col1 FROM tbl1 WHERE col2 = 1
> If there is no record in tbl1 with this condition, @var1 remains unchanged.
>
> I changed it in PostgreSQL to
> SELECT INTO _var1 _var1 || col1 FROM tbl1 WHERE col2 = 1
> It there is no record in tbl1 with this condition, _var1 is now NULL.
>
> Is there an easy way to have the same result as in SQL Server or do I have
> use a temporary variable and concatenate values after ?
>
> Patrick Fiche
> email : patrick.fiche@aqsacom.com
> tél : 01 69 29 36 18
>
>
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