Attached is a draft patch that makes rules support RETURNING as per my
proposal of earlier today, ie, have the rewriter automatically adjust a
RETURNING clause present in an unconditional INSTEAD rule.  The core of
the patch is barely twenty lines (the code added to rewriteRuleAction)
--- the rest is error checking to reject invalid rules.

Comments, objections?

                        regards, tom lane

Attachment: bin91urRGXXGs.bin
Description: rule-returning.patch.gz

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