> > I think the proposed idea of applying record::text explicit coercion to a > whole-row reference in the IS NOT NULL condition in the CASE WHEN > conversion would work as expected as you explained, but I'm concerned that > the cost wouldn't be negligible when the foreign table has a lot of columns. >
That's right, if the foreign server doesn't optimize the case for IS NOT NULL, which it doesn't :) I am happy to use any cheaper means e.g a function which counts number of columns in a record. All we need here is a way to correctly identify when a record is null and not null in the way we want (as described upthread). I didn't find any quickly. Do you have any suggestions? -- Best Wishes, Ashutosh Bapat EnterpriseDB Corporation The Postgres Database Company
