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view tests/timestamp.ur @ 1886:b7cd3c7c7edd
Interpret 'table' signature items more flexibly, automatically adding (Ur) constraints to support a kind of subtyping over (SQL) constraint sets
author | Adam Chlipala <adam@chlipala.net> |
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date | Mon, 04 Nov 2013 15:14:23 -0500 |
parents | 690638bd9fef |
children |
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table t : { A : time } fun many ls = case ls of [] => (WHERE TRUE) | tm :: ls' => (WHERE t.A = {[tm]} AND {many ls'}) task initialize = fn () => tm <- now; dml (DELETE FROM t WHERE {many (tm :: [])})