annotate tests/selexp.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> |
| date |
Mon, 04 Nov 2013 15:14:23 -0500 |
| parents |
71bafe66dbe1 |
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| rev |
line source |
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adamc@233
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1 table t1 : {A : int, B : string, C : float}
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adamc@233
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2 table t2 : {A : float, D : int}
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adamc@233
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3
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4 val q1 = (SELECT 0 AS Zero FROM t1)
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5 val q2 = (SELECT t1.A < t2.D AS Lt FROM t1, t2)
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6 val q3 = (SELECT t1.A < t2.D AS Lt, t1.A, t2.D, t1.C = t2.A AS Eq FROM t1, t2)
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