comparison demo/constraints.ur @ 1394:d328983dc5a6

Allow subqueries to reference aggregate-only columns of free tables; treat non-COUNT aggregate functions as possibly returning NULL
author Adam Chlipala <adam@chlipala.net>
date Sat, 15 Jan 2011 14:53:13 -0500
parents 74a090ff296e
children
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1393:802c179dac1f 1394:d328983dc5a6