On Fri, Mar 9, 2012 at 12:04 PM, Max Vlasov <max.vla...@gmail.com> wrote:
> So looks on the way from 3.6.10 to 3.7.10 something was really fixed > related to this issue, but seems like not everything. > > Don't know whether this is serious or a problem at all, but I spent some time with such queries and narrowed the random part to (the table still the same, auto-incremented id from 1 to 1000) Select id, (abs(random() % 1000)) as rndid from TestTable where id <= rndid order by id desc limit 5 which in 3.7.10 returns results like id / rndid "442" "84" "441" "134" "440" "135" "439" "805" "438" "971" Looks like rndid is evaluated only once for comparison, but produces different random-originated results for output.I remember there was a discussion about it and even different versions behave differently. I think that either rndid here should contain the value evaluated for where or comparison should be performed for every row separately What also puzzles me is that another variation of the original query Select id, (abs(random() % (ToValue-FromValue + 1))) as actualrndid from TestTable left join (Select 1 as FromValue, 1000 as ToValue) StatTable where id<=actualrndid order by id desc limit 10 ...always returns for left (id) column random values from 800 to 900 (no other ranges), but if I change ToValue-FromValue to 999 (no other modifications to the query), id column starts returning values from different part of 1..1000 range (the version is still the same, 3.7.10) Max _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
