At 13:06 5/07/00 -0400, Tom Lane wrote:
>
> UPDATE userTable SET oidcolumn = tmptable.newLOoid WHERE
> oidcolumn = tmptable.oldLOoid;
>
It's actually nastier than this since there could be multiple oid columns,
implying, potentially, multiple scans of the table.
I suppose
update userTable setoidCol1 = Coalesce( (Select newLOoid from oidxref where oldLOoid = oidCol1
), oidCol1 ),oidCol2 = Coalesce( (Select newLOoid from oidxref where oldLOoid = oidCol2
), oidCol2 ),...
would work, or at least only update each row once, but it looks slow.
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